Journal articles: 'Prestressed concrete construction Joints'

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Yan, Xueyuan, Suguo Wang, Canling Huang, Ai Qi, and Chao Hong. "Experimental Study of a New Precast Prestressed Concrete Joint." Applied Sciences 8, no. 10 (October 10, 2018): 1871. http://dx.doi.org/10.3390/app8101871.

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Precast monolithic structures are increasingly applied in construction. Such a structure has a performance somewhere between that of a pure precast structure and that of a cast-in-place structure. A precast concrete frame structure is one of the most common prefabricated structural systems. The post-pouring joint is important for controlling the seismic performance of the entire precast monolithic frame structure. This paper investigated the joints of a precast prestressed concrete frame structure. A reversed cyclic loading test was carried out on two precast prestressed concrete beam–column joints that were fabricated with two different concrete strengths in the keyway area. This testing was also performed on a cast-in-place reinforced concrete joint for comparison. The phenomena such as joint crack development, yielding, and ultimate damage were observed, and the seismic performance of the proposed precast prestressed concrete joint was determined. The results showed that the precast prestressed concrete joint and the cast-in-place joint had a similar failure mode. The stiffness, bearing capacity, ductility, and energy dissipation were comparable. The hysteresis curves were full and showed that the joints had good energy dissipation. The presence of prestressing tendons limited the development of cracks in the precast beams. The concrete strength of the keyway area had little effect on the seismic performance of the precast prestressed concrete joints. The precast prestressed concrete joints had a seismic performance that was comparable to the equivalent monolithic system.

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RUBIN, O. D., S. E. LISICHKIN, and O. V. ZYUZINA. "THE INFLUENCE OF BASALT-COMPOSITE PRESTRESSED REINFORCEMENT ON THE OPERATION OF LOW-REINFORCED CONCRETE STRUCTURES WITH INTERBLOCK CONSTRUCTION JOINTS." Prirodoobustrojstvo, no. 5 (2020): 50–59. http://dx.doi.org/10.26897/1997-6011-2020-5-50-59.

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It is proposed to use prestressed basalt composite reinforcement to strengthen reinforced concrete structures of hydraulic structures. In order to substantiate technical reinforcement of reinforced concrete structures of hydraulic structures with prestressed basalt composite inforcement, experimental studies were carried out. For experimental studies, reinforced concrete beam-type structures with vertical interblock construction joints were adopted.The results of experimental studies of reinforced concrete models of beam type with interblock joints reinforced with prestressed basalt composite reinforcement by the method of tension “on concrete”are presented. The models are tested for bending moment and transverse force. A special character of cracking is noted; full restoration of the bearing capacity of reinforced concrete structures, weakened by interblock construction joints, was recorded due to the reinforcement of prestressed basalt composite reinforcement.

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Li, Qing Ning, Huang Huang, and Wei Shan Jiang. "Joint Construction of Assembled Integrally Floor." Advanced Materials Research 446-449 (January 2012): 775–79. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.775.

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This article expounds the floor ends and sides joint constructions of prestressed concrete floor and prestressed concrete hollow floor with added surface，as well as prestressed concrete hollow floor without added surface，and the comparation are available。Finally，some new construction methods are raised based on improving the seismic performance of integrally assembled prestressed concrete floor。

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Rubin, Oleg D., Sergey E. Lisichkin, and Oksana V. Zyuzina. "Experimental studies of the stress-strain state of reinforced concrete structures strengthened by prestressed basalt-composite rebar." Structural Mechanics of Engineering Constructions and Buildings 17, no. 3 (October 24, 2021): 288–98. http://dx.doi.org/10.22363/1815-5235-2021-17-3-288-298.

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Relevance. In recent years, composite materials have become widespread in the construction of reinforced concrete structures for industrial, civil and transport structures. It is proposed to strengthen the reinforced concrete structures of hydraulic structures with prestressed basalt composite rebar. It took an experimental and theoretical substantiation of technical solutions to strengthen the reinforced concrete structures of hydraulic structures with prestressed basalt composite reinforcement. The aim of the work was to carry out a set of experimental and theoretical studies of the stress-strain state and internal forces in low-reinforced concrete structures of hydraulic structures reinforced with prestressed basalt composite rebar. Methods. Experimental studies of the stress-strain state and internal forces were carried out on the basis of low-reinforced concrete beam-type models with interblock construction joints, harden with prestressed basalt composite reinforcement in the stretched (compressed) zones of the models. Theoretical studies of the stress-strain state and internal forces were carried out on the basis of the theory of reinforced concrete and structural mechanics. Results. As a result of the research carried out on typical low-reinforced concrete structures of hydraulic structures with interblock construction joints, the main stages of the stress-strain state of hydraulic reinforced concrete structures were formulated. Based on the data of experimental and theoretical studies, taking into account the reinforcement with prestressed basalt composite rebar, as well as with prestressed clamps in the shear zone, a method was developed for calculating the strength of low-reinforced hydrotechnical reinforced concrete structures with interblock construction joints.

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Zyuzina, Oksana V. "Experimental studies of reinforced concrete structures of hydraulic structures strengthened with prestressed transverse reinforcement." Structural Mechanics of Engineering Constructions and Buildings 16, no. 6 (December 15, 2020): 504–12. http://dx.doi.org/10.22363/1815-5235-2020-16-6-504-512.

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Relevance. When repairing hydraulic structures, it is often necessary to face the task of strengthening them. Among the methods of strengthening retaining structures, the most interesting are those that allow to immediately include reinforcement elements in joint work with the structure and carry out work without removing the backfill soil from the rear edge. When choosing repair materials, attention should be paid to corrosion-resistant composite materials, the use of which in hydraulic engineering is not yet standardized, but the scope of their application is expanding every year. The main aim of experimental research is to strengthen the reinforced concrete structures of hydraulic structures, including those with interblock construction joints and transverse cracks, using prestressed transverse reinforcement. Methods. The investigations were carried out on a reinforced concrete model of a beam type reinforced with prestressed transverse reinforcement in the zone of inclined cracks formation. The model was made taking into account the typical tasks encountered during the repair of long-term operating retaining hydraulic structures with open seams and cracks, insufficient transverse reinforcement, low reinforcement coefficient, and initial deflection. Results. The task of strengthening a special reinforced concrete model using prestressed transverse reinforcement was realized. Experimental data were obtained on the nature of deformation and destruction, the opening of interblock construction joints and cracks, and the stresses in the reinforcement. Recommendations are given for strengthening the operated low-reinforced concrete structures of hydraulic structures with interblock construction joints with prestressed reinforcement.

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Yang, Min. "Prestressed Concrete Building Coal Mine Stent Design." Applied Mechanics and Materials 651-653 (September 2014): 1224–26. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.1224.

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With the continuous development of China's coal technology, prestressed concrete stand in the coal mine construction jobs because of the building structure stiffness, mechanical characteristics, and other characteristics of joints less widely used. Firstly, the main concepts of prestressed concrete is analyzed, combined with the building of a coal mine stent design prestressed concrete examples of the main problems in the mine design process involved the stent to expand a detailed analysis and discussion, hoping to mine construction of large buildings play a guiding role in improving mine safety production conditions, to provide reliable protection for coal mine safety.

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Han, Wei Wei, Dong Sheng Zhang, Na Li, Xi Juan Xu, and De Sheng Jia. "Research on the Construction Technology of Cross-Prestressed Concrete Pavement." Advanced Materials Research 857 (December 2013): 283–87. http://dx.doi.org/10.4028/www.scientific.net/amr.857.283.

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Cross-prestressed concrete pavement, without setting expansion joints, can extend its service life, improve its bearing capacity and make the continuous construction possible. In recent years, it has been successfully applied to toll plazas, short subgrade of the highway and the overweight or overloaded road. Materials choosing, construction method of the cross-prestressed concrete pavement was presented in details and some relevant problems during the construction have been discussed in this paper.

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Tang, Mengxiong, Zao Ling, and Yuliang Qi. "Bending Strength of Connection Joints of Prestressed Reinforced Concrete Pipe Piles." Buildings 13, no. 1 (January 3, 2023): 119. http://dx.doi.org/10.3390/buildings13010119.

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The connection joint of prestressed concrete pipe piles is a typical steel–concrete structure, and its bending strength has evolved into a critical factor affecting the safety of supporting structures in underground engineering. Based on full-scale bending tests of five specimens of large-diameter prestressed reinforced concrete (PRC) pipe piles and connection joints, as well as the corresponding finite element numerical simulation, the bending bearing and deformation characteristics of connection joints of PRC pipe piles were analyzed, together with the effects of concrete strength, precompression stress, and connection mode of joints. The results showed that the crack resistance of the welded joint of PRC pipe piles was equivalent to that of the pipe pile shaft, but the ultimate bending moment of the joint was about 58–87% of that of the pile shaft. The bending failure mode of the pipe pile joint was mainly manifested in the end plate yielding into a drum shape, with the tension side of the pile hoop and the end plate clearly separated from the pipe pile, and crushed concrete at the upper edge of the pile hoop. The bending strength of the joint can be improved by increasing the bonding strength between the end plates of the joint or embedding Rachel reinforcement in concrete. In addition, synchronously increasing the strength grade and reinforcement ratio of concrete or strengthening the precompression stress of concrete are favorable measures.

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Song, Manrong, Jiaxuan He, Yuan Liu, Hang Zhang, Chenjun Ge, Yadong Jin, Bingkang Liu, Shenjiang Huang, and Yan Liu. "Seismic Behavior of Three-Story Prestressed Fabricated Concrete Frame under Dynamic and Low Reversed Cyclic Loading." Advances in Civil Engineering 2018 (September 10, 2018): 1–10. http://dx.doi.org/10.1155/2018/7876908.

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Precast concrete structure is the building industrialization of the sure route. It can realize the construction process of low energy consumption and low emission and effectively meet the green development requirements of the construction industry. Based on prestressing technique, the connections of the precast concrete structure obtain prestress producing integrate joints and continuous frames, which improve the seismic safety and are applied widely in the earthquake area. To study seismic behavior of prestressed fabricated concrete frame structure, the experiments on the concrete frame under dynamic loading and low reversed cyclic loading were carried out. The single-span three-story prestressed fabricated concrete frame can accurately represent the load-carrying capability and the failure mechanism of multistory frame. Results of the study show that experimental specimens have good behaviors such as full hysteresis curves, proper displacement restoring capacity, and energy dissipation; the maximum interlayer drift ratio arrives 0.27% which has no damage to the frame in small earthquakes subjected to the 102 gal peak ground acceleration; the frame is repairable in moderate earthquakes when the maximal interlayer drift ratio arrives 0.73% subjected to the 204 gal peak ground acceleration; plastic hinges appeared at the ends of beam under low reversed cyclic loading firstly where the section curvature ductility factor ranges from 3.64 to 5.62; biaxial compression is acquired at beam-column joints with the help of column axial force and horizontal prestressing force; the beam fails before the column in the prestressed fabricated concrete frame at interlayer drift ratio between 1.56% and 2.56%.

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Li, Hong Jiang. "Influence of Stiffness Weakening at Construction Joints on the Deflection of Cantilevering-Cast Prestressed Concrete Box Girder." Applied Mechanics and Materials 777 (July 2015): 34–37. http://dx.doi.org/10.4028/www.scientific.net/amm.777.34.

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For a long-span prestressed concrete box-girder bridge erected by the double-cantilever segmental method, concrete of segmental joints and concrete in their nearby area may be different from integrally-cast concrete in structural performances. For example, the stiffness of segmental joints could be weakened significantly. To reveal influences of weakening in the stiffness of segmental joints on the deflection at mid-span of box girder, a typical continuous rigid frame bridge in China was taken as the analysis example, and its finite element models were established. In these models, weakening joints were simulated. After the validity of finite element models were warranted, the deflection in the completed construction stage and the long-term deflection in the running period of box girder were calculated, and then the variation of these deflections with the stiffness reduction in all segmental joints was described. Results showed that, compared with the shearing stiffness reduction in segmental joints, the bending stiffness reduction played more significant role in affecting the deflection of box girder. When the weakening times of joint stiffness arrived at 100, deflection values of the box girder increased significantly. However, in the practical engineering, the determination of stiffness reduction in segmental joints according by their damages, and the incorporation of weakening segmental joints into the bearing capacity assessment for existing box girders were all worth further study.

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Yan, Xueyuan, Shen Shi, Xuhong Liu, and Huimin Mao. "Numerical Analysis of Mechanical Behavior of Self-Centering Joint between CFDST Column and RC Beam." Buildings 13, no. 1 (January 4, 2023): 135. http://dx.doi.org/10.3390/buildings13010135.

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The existing connection between the concrete-filled double steel tubular (CFDST) column and the reinforced concrete (RC) beam is difficult to repair and reuse after damage. In this paper, a self-centering joint between the CFDST column and the RC beam is proposed. The self-centering of the joint is realized by prestressed steel strands, and the energy dissipation is realized by friction. The overall purpose of the research is to analyze the influence of steel strand and friction on the mechanical behavior of the joint. By comparing the envelope curve and the restoring force model of a numerical joint model with theoretical values, accuracy of the numerical model was verified. Then, joints with different parameters, including the friction, prestress of steel strands, and ratio of the resisting moment provided by steel strands to the resisting moment provided by friction in the opening moment of joints, were numerically analyzed. The results showed that the joints with greater friction and prestress of steel strands had higher bearing capacity. Increasing the friction could increase the energy dissipation capacity of the joint, but it would increase the residual deformation of the joint. To reduce residual deformation, the prestress of steel strands should be increased. When the resultant force of the pretension of steel strands was greater than friction, the steel head could be kept pressed on the connecting block, making the stress changes of steel strands and the self-centering performance of the joint stable.

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Xiong, Xueyu, Yifan Xie, Gangfeng Yao, Ju Liu, Laizhang Yan, and Liang He. "Experimental Study on Seismic Performance of Precast Pretensioned Prestressed Concrete Beam-Column Interior Joints Using UHPC for Connection." Materials 15, no. 16 (August 22, 2022): 5791. http://dx.doi.org/10.3390/ma15165791.

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The traditional connections and reinforcement details of precast RC frames are complex and cause difficulty in construction. Ultra-high-performance concrete (UHPC) exhibits outstanding compressive strength and bond strength with rebars and strands; thus, the usage of UHPC in the joint core area will reduce the amount of transverse reinforcement and shorten the anchoring length of beam rebars as well as strands significantly. Moreover, the lap splice connections of precast columns can be placed in the UHPC joint zone and the construction process will be simplified. This paper presented a novel joint consisting of a precast pretensioned prestressed concrete beam, an ordinary precast reinforced concrete (RC) column, and a UHPC joint zone. To study the seismic performance of the proposed joints, six novel interior joints and one monolithic RC joint were tested under low-cyclic loads. Variables such as the axial force, the compressive strength of UHPC, the stirrup ratio were considered in the tests. The test results indicate that the proposed joints exhibit comparable seismic performance of the monolithic RC joint. An anchorage length of 40 times the strands-diameter and a lap splice length of 16 times the rebar-diameter are adequate for prestressed strands and precast column rebars, respectively. A minimum column depth is suggested as 13 times the diameter of the beam-top continuous rebars passing through the joint. In addition, a nine-time rebar diameter is sufficient for the anchorage of beam bottom rebars. The shear strength of UHPC in the joint core area is suggested as 0.8 times the square root of the UHPC compressive strength.

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13

Wang, Kun, Zhiyu Zhu, Yang Yang, Kai Yan, Guanpu Xu, and Guanjun Zhang. "Study on shear capacity of prestressed composite joints with concrete-encased CFST columns." Advances in Structural Engineering 24, no. 11 (March 23, 2021): 2457–71. http://dx.doi.org/10.1177/13694332211000558.

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Through assuming reasonable constitutive relation of materials, finite element analysis (FEA) models of joints consisting of prestressed concrete-encased steel beams and concrete-encased concrete filled steel tube (CFST) columns were established by soft ABAQUS, and the simulated results were compared with tested ones. On this basis, the nonlinear analysis on the total loading process was conducted, and the stress variation of concrete, profile steel skeleton, steel bar skeleton, and prestressing tendons were observed at yield, peak, and ultimate loads; the influence of axial compressive ratio, steel tube ratio, stirrup ratio, and prestressing level on lateral load-displacement curves at column top and shear force-shear angle in joint core were investigated, and the shear capacity formulae of joint core were developed. It could be concluded that, the lateral peak loads and shear capacity could be improved with the increase of axial compressive ratio, steel tube ratio, stirrup ratio, and prestressing levels in varying degrees, and the ductility of joints will reduce with the increase of axial compressive ratio. Additionally, the shear capacity calculated by proposed practical formula was a little lower than FEA results, which could keep the joints safety and could be used in engineering design.

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Liu, Jie, Xiangyu Huang, Juanjuan Chen, and Qiaoyun Wu. "Effect of Shear Deformation at Segmental Joints on the Short-Term Deflection of Large-Span Cantilever Cast Prestressed Concrete Box Girders." Buildings 13, no. 1 (January 12, 2023): 219. http://dx.doi.org/10.3390/buildings13010219.

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The excessive deflection of large-span cantilever cast prestressed concrete (LCCPC) box girders has always been a complex problem to be solved in bridge engineering. To analyze the effect of shear deformation at segmental joints on the deflection of LCCPC box girders, comparison tests were carried out on three prestressed concrete (PC) I-girders with joints and a PC I-girder without joints, and a finite element simulation method of segmental joints was proposed based on the tests. Subsequently, finite element analysis was conducted on a test girder and the Assistant Shipping Channel Bridge of Humen Bridge (a PC continuous rigid frame bridge with a main span of 270 m) using this method. The experimental and theoretical analysis results showed that the effect of the shear deformation at joints compared to the deformation at midspan of the girder specimens was negligible. Deformation at midspan of the specimens would not significantly increase, even if shear rigidity at the joints was significantly reduced or there were more joints in the girder specimen. The effect of shear deformation at segmental joints on the deflection of LCCPC box girders was quite small and thus insignificant.

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RUBIN, O. D., S. E. LISICHKIN, and O. V. ZYUZINA. "STRENGTH OF LOW-REINFORCED CONCRETE STRUCTURES WITH THE INTERBLOCK CONSTRUCTION JOINTS REINFORCED BY PRESTRESSED BASALT-COMPOSITE BARS." Prirodoobustrojstvo, no. 1 (2021): 53–62. http://dx.doi.org/10.26897/1997-6011-2021-1-53-62.

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Many slightly reinforced concrete structures of operating hydraulic structures need strengthening. Traditional methods of strengthening (by reinforced concrete, metal structures, etc.) have significant disadvantages. A method of strengthening by external reinforcement systems based on carbon fiber which is effective in cases where there is an access to the tension zone of the reinforced structures begins to spread. The authors propose to strengthen slightly reinforced concrete structures of the operated hydraulic structures with pre-stressed basalt composite reinforcement placed in the pre-drilled holes in the concrete of the reinforced structures. To substantiate the proposed technical solutions there was carried out a set of experimental studies of characteristic slightly reinforced concrete structures of hydraulic facilities (including those with inter-block construction joints) reinforced with pre-stressed basalt composite reinforcement. The results of experimental studies have shown the effectiveness of strengthening low-reinforced concrete structures of operating hydraulic facilities with inter block construction joints by means of pre-stressed: longitudinal basalt composite reinforcement and transverse reinforcement.

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Tork, Andres. "Investigation of prestressed concrete box beams of an elevated expressway." Canadian Journal of Civil Engineering 12, no. 1 (March 1, 1985): 1–11. http://dx.doi.org/10.1139/l85-001.

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The object of this paper is to share the experience gained from an investigation of prestressed concrete box beams of the elevated roadway of the F. G. Gardiner Expressway in Toronto, 16 years after construction. The 18–30 m long, simply supported beams, which are either pretensioned or posttensioned with prestressing strands, are covered by concrete topping and asphalt. Methods of investigation include coring, chloride-content tests, and power chipping of soffit areas. Rusted reinforcing steel, rusted prestressing strands, and delaminated or spalled concrete were found at transverse joints and at beam soffits. Concrete damage due to bird droppings, as well as a beam with nearly 60% strand loss, were discovered. Causes for deterioration are discussed and proposed repair methods are described.

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Tong, Wan Quan. "Asymmetric of Continuous Rigid Frame Bridge Precamber and Construction." Applied Mechanics and Materials 361-363 (August 2013): 1228–31. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.1228.

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Prestressed concrete continuous rigid frame bridge has the advantages of no expansion joints, smooth driving the advantages,however, due to cross under serious scratch,seriously affect the service life of the bridge.Take a Large span asymmetric continuous rigid frame bridge of Guizhou as engineering background,use finite element Program Midas/Civil modeling,carried out Analysis of the construction process,And select a reasonable way to Set the bridge pre-camber,and provide reasonable data for the construction of control,to ensure the bridge structure linear reasonable.

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Hou, He Tao, Yan Fei Sun, Jian Zhou, Zhong Long Lv, and Jing Jing Li. "Design and Application of Lightweight Steel Residential House." Applied Mechanics and Materials 353-356 (August 2013): 2851–56. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.2851.

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This paper presented a design of a steel residential house. H-shaped steel was chosen as the beam and column of the steel frame. End-plate joints and welding node joints were used to connect each other so that the structure could be constructed rapidly and conveniently. PK prestressed concrete composite slab was chosen as the floor and roof slab. PK slab could be produced in factory and dont need formwork assembling and setting and could reduce the amount of work on-site, and could shorten the period of construction effectively. Composite panels with steel truss reinforced concrete and bamboo reinforced ceramic concrete were chosen as exterior walls. Compared with aerated concrete block wall with external insulation, composite panels had the advantages such as lightweight, energy saving, rapid installation, less slit and small thickness of wallboard and better seismic behavior. Application of the technology made the steel residential house a lightweight, energy saving and rapid construction house.

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Li, Yang Eileen, Liang Guo, Biljana Rajlic, and Philip Murray. "Hodder Avenue Underpass: An Innovative Bridge Solution with Ultra-High Performance Fibre-Reinforced Concrete." Key Engineering Materials 629-630 (October 2014): 37–42. http://dx.doi.org/10.4028/www.scientific.net/kem.629-630.37.

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The Hodder Avenue underpass – recipient of the Precast/Prestressed Concrete Institute (PCI)’s Harry H. Edwards Industry Advancement Award – is a new highway bridge near Thunder Bay, Canada that utilized a modular construction approach facilitated by the extensive use of ultra-high performance fibre-reinforced concrete (UHPFRC) to expedite construction, elevate aesthetic value and enhance quality and durability. Almost all structural components were precast in facilities and assembled on site using UHPFRC joints, which have compact geometries with less complexity, superior durability and strength. The precast elements include a unique UHPFRC pier cap and pier column shells, high performance concrete (HPC) box girders, sidewalks/parapet walls, abutment caps, ballast walls, slope paving panels and approach slabs. Aesthetically, the structure achieved a slender and open form with the use of shallow precast box girders and a unique pier cap visually and structurally integral with the superstructure. The cap beam was prestressed and precast fully with UHPFRC to overcome design challenges such as geometrical limitations and complex loading. The pier cap and girders were made composite using field-cast UHPFRC joints reinforced with stainless steel bars and threaded bolts. The pier columns also utilized a unique design with precast UHPFRC shells serving as an aesthetic stay-in-place form as well as a protective layer for the salt splashes during Thunder Bay’s harsh winter seasons.

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Zhang, Xizhi, Jiawei Zhang, Xuejian Gong, and Shaohua Zhang. "Seismic performance of prefabricated high-strength concrete tube column–steel beam joints." Advances in Structural Engineering 21, no. 5 (August 24, 2017): 658–74. http://dx.doi.org/10.1177/1369433217726895.

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This study proposes a new type of fabricated hybrid frame structure, which is a prefabricated high-strength concrete tube column–steel beam joint hybrid frame structure. A series of six full-scale cruciform prefabricated high-strength concrete tube column–H-shaped beam joint specimens was tested under cyclic loading to investigate the seismic performance of the new fabricated hybrid frame structure. We designed the connection in the manner that the capacity of beam was higher than that of the column. The cracking pattern, failure modes, energy dissipation capacity, and strain profiles of the specimens were obtained and discussed. The test results showed that some specimens collapsed due to ring plate tearing failure and weld fracture, while other specimens collapsed due to column flexural failure. Shear connectors (i.e. shear studs and shear reinforcement) could ensure the reliable transmission of shear force, and the compound stirrups can effectively improve bearing capacity and joint ductility. The stiffness degradation of specimens was smooth with a linearly decreasing trend because of the prestressed reinforcement. The new joints could be applied in a seismic region.

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Vercher, Jose, Enrique Gil, Ángeles Mas, and Carlos Lerma. "Structural Flexural Bending Assessment of Prestressed Concrete Joist with Corrosion." Advanced Materials Research 671-674 (March 2013): 790–93. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.790.

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The number of situations where it is necessary to intervene in existing structures is increasing. In Spain, rehabilitation and maintenance of buildings accounts for 30% of the activity of the construction sector and it is growing. This paper evaluates the residual safety of T prestressed joists with severe corrosion at the lower reinforcement. The reliability is assessed with the application of the ACI-318 load test. It is demonstrated that there is sufficient safety in cases of corroded prestressed joists. At any rate, it’s recommended to make a light repair under the damaged joists.

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Burroughs, Dan, James Lockwood, and Kenneth Price. "Innovative Prestressed Steel Composite Short-to Medium-Span Bridges." Transportation Research Record: Journal of the Transportation Research Board 1594, no. 1 (January 1997): 21–33. http://dx.doi.org/10.3141/1594-02.

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Methods for combining both prestressing, high-performance steel and composite concrete decks to improve bridge performance, construe-tibility, aesthetics, and economy are reviewed. The designs are part of a study sponsored by the American Iron and Steel Institute. Five bridge concepts have been developed to the preliminary design phase, including plan details and cost comparisons. Single- and two-span bridges with span lengths of between 24.4 and 54.9 m (80 and 180 ft) have been studied. The alternates developed use prestressing both longitudinally in the main structural components and transversely in the deck. Alternates include a modular space truss, a twin warren truss, a composite steel box, and steel girders. All alternates have either a cast-in-place or a precast concrete deck. Advantages include improved durability and reduced maintenance with the use of prestressing in the deck, which eliminates deck cracking. The use of corrosion-resistant steel eliminates painting requirements. Elimination of deck joints and use of integral piers and abutments also improve durability. Economy can be improved with the combined efficient use of steel, prestressing, and concrete; with the use of jointless bridges and integral abutments and piers; and by increasing shipping lengths, reducing the number of splices, and optimizing construction methods, which are integrated into the design. Construction issues are reviewed to reduce fabrication costs and to simplify bridge erection.

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Hu, Zebin, Zhenming Xu, Shufeng Zhang, Haibo Jiang, Yuanhang Chen, and Jie Xiao. "Experimental Study on Shear Behavior of Precast High-Strength Concrete Segmental Beams with External Tendons and Dry Joints." Buildings 12, no. 2 (January 27, 2022): 134. http://dx.doi.org/10.3390/buildings12020134.

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Precast high-strength concrete segmental beams with external tendons and dry joints (ED-PHCSBs) have become a potential alternative for achieving accelerated bridge construction due to their lighter self-weight and easier installation. In order to investigate the shear behavior of ED-PHCSBs, eight precast concrete segmental specimens were fabricated and tested to failure. For comparison purposes, one externally prestressed high-strength concrete monolithic beam was also investigated. The primary parameters, including concrete strength, shear span-depth ratio, stirrup ratio, joint number, and joint location, were adopted. Test results indicated that increasing the concrete strength or stirrup ratio can effectively improve the shear capacity of the ED-PHCSBs. The shear span-depth ratio was inversely proportional to shear strength for all specimens. The results also revealed that the joint number had a marginal effect on the defections and stresses of the external tendons of ED-PHCSBs. AASHTO 2017 and Chinese code 2018 can conservatively estimate the shear strength of ED-PHCSBs. Considering the actual failure modes of the precast beams, a calculation method based on a modified strut-and-tie model was proposed. The average and standard deviation of the ratios of the test results to the predicted value of the proposed method were 0.98 and 0.08, respectively. It indicated that the proposed formula was more accurate.

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Arockiasamy, M., A. P. Badve, B. V. Rao, and D. V. Reddy. "Fatigue Strength of Joints in a Precast Prestressed Concrete Double Tee Bridge." PCI Journal 36, no. 1 (January 1, 1991): 84–97. http://dx.doi.org/10.15554/pcij.01011991.84.97.

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Chai, Shun, Tong Guo, Zheheng Chen, and Jun Yang. "Flexural Behavior of Precast Concrete Segmental Box-Girders with Dry Joints." Advances in Civil Engineering 2020 (November 5, 2020): 1–14. http://dx.doi.org/10.1155/2020/8895180.

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Precast concrete segmental (PCS) box-girders are widely used in bridge construction, while studies on flexural behaviors of PSC box-girders with dry joints are insufficient. Six large-scale PCS box-girders with dry joints were tested to failure under two-point loading in this study. Strain increments, tendon forces, deflections at mid-span, and cracks were recorded during the tests. Multiple factors were investigated with regards to their influence on flexural performance of girders. It is found that most specimens failed due to the excessive force in tendons, while the specimen with external tendons failed due to concrete compressive crushing. Larger shear span ratio resulted in greater increase in tendon force and concrete strain during loading and, accordingly, the lowest ultimate flexural capacity. Lower concrete strength resulted in larger increase in concrete strain and tendon force during loading and relatively smaller deflection at failure. For the specimen with four segments, a significant increase in tendon force and smaller deflections at failure was observed as compared with specimen 1, though the failure load was similar. Numerical simulation is further conducted, where it is found that the area of prestressed tendon and the number of joints have a significant influence on ultimate flexural bearing capacity and deflection; besides, deflection control standard of PCS girders should be stricter than that of the integral cast girder. The corbel joints, in general, show better ultimate performance than the castle-shaped joints.

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Navrátil, Jaroslav, and Lukáš Zvolánek. "Shear at the Interface between Composite Parts of Prestressed Concrete Section." Applied Mechanics and Materials 752-753 (April 2015): 763–68. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.763.

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Composite concrete beams made of prefabricated prestressed or non-prestressed element and cast-in-place reinforced concrete slab became very popular in present-day civil engineering practice. Two concrete composite parts of beam are cast at different times. Different moduli of elasticity, consecutive load application, and differential creep and shrinkage cause unequal strains and stresses in two adjacent fibers of construction joint. The requirement is to ensure that both parts act fully compositely, because the bending and shear designs of composite members are based on this assumption. Therefore the level of shear stresses at the interface between two parts must be limited. The objective of the paper is to review the methods for the calculation of shear stresses in construction joint, and to evaluate the influence of different age of two concrete composite parts on the level of shear stresses. Calculation method alternative to Eurocode 2 method is proposed and tested. It is recommended to calculate the shear stress from difference of normal forces acting on sectional components in two neighboring sections of the element. It was observed that differential shrinkage of concrete components can significantly affect the stress distribution. Numerical studies were performed based on real-life examples of composite beams.

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Bae, Jae-Hyun, Hoon-Hee Hwang, and Sung-Yong Park. "Structural Safety Evaluation of Precast, Prestressed Concrete Deck Slabs Cast Using 120-MPa High-Performance Concrete with a Reinforced Joint." Materials 12, no. 18 (September 19, 2019): 3040. http://dx.doi.org/10.3390/ma12183040.

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Prestressed concrete structures are used in various fields as they can reduce the cross-sectional area of members compared with reinforced concrete structures. In addition, the use of high-performance and strength concrete can help reduce weight and achieve excellent durability. Recently, structures have increasingly been constructed using high-performance and strength concrete, and therefore, structural verification is required. Thus, this study experimentally evaluated the structural performance of a long-span bridge deck slab joint, regarded as the weak point of structures. The specimens were designed with a 4 m span for application to cable-stayed bridges. To ensure the required load resistance and serviceability, the specimens comprised of 120 MPa high-performance fiber-reinforced concrete and were prestressed. The deck slabs satisfied all static and fatigue performance as well as serviceability requirements, although they were thinner than typical concrete bridge deck slabs. The study also verified whether the deck slabs were suitable to help implement precast segmental construction methods. Finally, the results confirmed that the structural performance of the developed prestressed concrete (PSC) deck slab was sufficient for the intended bridge application as it achieved a sufficiently large safety factor in the static and fatigue performance tests, relative to the design requirement.

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Cao, Yuqi, Minjuan He, Renle Ma, Rongchang Yang, and Feng Liang. "Beam-column modeling and seismic fragility analysis of a prestressed segmental concrete tower for wind turbines." Advances in Structural Engineering 23, no. 8 (January 20, 2020): 1715–27. http://dx.doi.org/10.1177/1369433219900295.

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As the development of wind energy in earthquake areas advances, the seismic performance of concrete supporting towers has become an important subject. A beam-column model is developed for a prestressed segmental concrete tower supporting a wind turbine considering the properties of dry joints. The proposed model is in good agreement with the solid element model deformation results and the field test modal results. Based on the beam-column model, nonlinear time history analyses considering uncertainties are conducted to evaluate the behavior of the prototype tower under earthquake action. In the process, a new engineering demand parameter, called the average curvature, is defined. The results are compared with those based on a conventional engineering demand parameter. The availability of the prototype tower under earthquake action and the effectiveness of the newly defined engineering demand parameter are validated.

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Liu, Zhengyu, Brent M. Phares, Weizhuo Shi, and Behrouz Shafei. "Full-Scale Evaluation of an Innovative Joint Design between Adjacent Box Beams." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 2 (January 30, 2020): 33–44. http://dx.doi.org/10.1177/0361198120902695.

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The longitudinal joints on adjacent precast, prestressed box beams used in bridge construction are vulnerable to cracking. These cracks provide a direct path for water and deleterious agents to enter the structural system, causing corrosion of the embedded steel bars and tendons. To avoid significant maintenance costs, safety concerns, or both, an innovative longitudinal joint between two adjacent box beams was designed in the current study. This joint is 6½ in. wide with roughened surfaces, filled with shrinkage compensating concrete and reinforced by steel bars. The joint was evaluated on a small-scale basis and satisfactory performance was obtained in resisting early-age cracks. In the current paper, the joint design is further evaluated through experiments on a 31 ft long specimen during the joint’s early age, and when it is subjected to multiple levels of cyclic loads. A finite element (FE) model that is capable of simulating the early-age concrete hardening was also developed and validated against the experimental data. The early-age, time-dependent stress development in the joint and at the interface of the joint and box beam was investigated using the FE model. Based on the results of laboratory tests and FE simulations, the innovative joint was found to remain crack free without the utilization of a shear key or transverse post-tensioning. The “compression-dominate” joint created by the expansive joint material and transverse reinforcing bars across the interface is expected to address the issues associated with early age, while ensuring the long-term durability and performance of box-beam bridges.

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Yuan, Xiao Hui, and Zhe An Lu. "Stress Performance Analysis on New Type of Concrete-Filled Steel Tube Pre-Stressed Truss Continuous Beam Bridge." Applied Mechanics and Materials 271-272 (December 2012): 1415–20. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.1415.

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This paper takes the construction of Gan Hai-zi concrete-filled steel tube pre-stressed continuous truss Beam Bridge as the engineering background. Combined with the actual construction process of the bridge, taken the main structure of the bridge as the typical prestressed composite structure and used the finite element joint section to simulation the whole construction process of the 35th and 36th experimental cross composite structure of the bridge. Theoretical analysis combined with the field test, and the calculation results are in good agreement with the experimental results，which shows that the construction mechanical performance of the new bridge structure is good.

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Zając, Jakub, and Łukasz Drobiec. "Comparison of the Performance of Prestressed Ribbed Panels and Hollow Core Panels Supported on Four-Edges." IOP Conference Series: Materials Science and Engineering 1203, no. 3 (November 1, 2021): 032049. http://dx.doi.org/10.1088/1757-899x/1203/3/032049.

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Abstract Tests of full-scale models of the precast slab with dimensions of 6.30 x 6.30 m, built of two different precast panels, were carried out under short-term load. The models were made of autoclaved aerated concrete (700 type) brick with a thickness of 240 mm and a height of 2.24 m. The slabs were supported at four edges. The first slab was precast prestressed ribbed panels with concrete overtopping. The second slab was made of prestressed hollow-core panels. The panels had the same modular width of 600 mm. Tests were carried out under load placed on the top of the slab. The short-term load was applied sequentially, and displacement measurements were measurement by the electronic method. The load was initially applied evenly distributed. In the last step, part of the load was transferred to one-half of the slabs. The obtained load was different for each half of the slab. The first part of the slab were panels 1 to 5, loaded with the value of 1.7 kN/m2, and the second part was panels 6 to 10 loaded with the value of 7.7 kN/m2. The tests allow determining the difference in slabs' performance depending on shear key construction. The panels maintained the possibility of load redistribution based on their interaction despite the longitudinal joints' work only through the concrete cross-section. The slabs had a different character of transverse displacements depending on the presence of concrete topping. The models revealed a different response to transferring part of the load to one-half of the slabs. There were no cracks in the line of longitudinal joints on the upper surface of the slabs. Also, there were no cracks on the bottom of the panels. At the panels' connection with the wall, rotation and lifting corners of the slabs were noticed. The measured displacements were significantly smaller than for the corresponding models of single-span slabs with a parallel load.

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Park, Ki-Choul. "Stress Distribution in Construction Joint of Prestressed Concrete Bridge Members with Tendon Couplers." Journal of the Korea Concrete Institute 17, no. 4 (August 1, 2005): 535–42. http://dx.doi.org/10.4334/jkci.2005.17.4.535.

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Samir, Peter, and George Morcous. "Precast Prestressed Concrete Truss-Girder for Roof Applications." Journal of Structures 2014 (December 14, 2014): 1–13. http://dx.doi.org/10.1155/2014/524156.

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Steel trusses are the most popular system for supporting long-span roofs in commercial buildings, such as warehouses and aircraft hangars. There are several advantages of steel trusses, such as lightweight, ease of handling and erection, and geometric flexibility. However, they have some drawbacks, such as high material and maintenance cost, and low fire resistance. In this paper, a precast concrete truss is proposed as an alternative to steel trusses for spans up to 48 m (160 ft) without intermediate supports. The proposed design is easy to produce and has lower construction and maintenance costs than steel trusses. The truss consists of two segments that are formed using standard bridge girder forms with block-outs in the web which result in having diagonals and vertical members and reduces girder weight. The two segments are then connected using a wet joint and post-tensioned longitudinally to form a crowned truss. The proposed design optimizes the truss-girder member locations, cross-sections, and material use. A 9 m (30 ft) long truss specimen is constructed using self-consolidated concrete to investigate the constructability and structural capacity of the proposed design. A finite element analysis of the specimen is conducted to investigate stresses at truss diagonals, verticals, and connections. Testing results indicate the production and structural efficiency of the developed system.

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Hamahara, Masayuki, Minehiro Nishiyama, Haruhiko Okamoto, and Fumio Watanabe. "Design for Shear of Prestressed Concrete Beam-Column Joint Cores." Journal of Structural Engineering 133, no. 11 (November 2007): 1520–30. http://dx.doi.org/10.1061/(asce)0733-9445(2007)133:11(1520).

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Kim, Wooseok, Jeffrey A. Laman, Farzin Zareian, Geunhyung Min, and Dohyung Lee. "Influence of Construction Joint and Bridge Geometry on Integral Abutment Bridges." Applied Sciences 11, no. 11 (May 29, 2021): 5031. http://dx.doi.org/10.3390/app11115031.

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Although integral abutment bridges (IABs) have become a preferred construction choice for short- to medium-length bridges, they still have unclear bridge design guidelines. As IABs are supported by nonlinear boundaries, bridge geometric parameters strongly affect IAB behavior and complicate predicting the bridge response for design and assessment purposes. This study demonstrates the effect of four dominant parameters: (1) girder material, (2) bridge length, (3) backfill height, and (4) construction joint below girder seats on the response of IABs to the rise and fall of AASHTO extreme temperature with time-dependent effects in concrete materials. The effect of factors influencing bridge response, such as (1) bridge construction timeline, (2) concrete thermal expansion coefficient, (3) backfill stiffness, and (4) pile-soil stiffness, are assumed to be constant. To compare girder material and bridge geometry influence, the study evaluates four critical superstructure and substructure response parameters: (1) girder axial force, (2) girder bending moment, (3) pile moment, and (4) pile head displacement. All IAB bridge response values were strongly related to the four considered parameters, while they were not always linearly proportional. Prestressed concrete (PSC) bridge response did not differ significantly from the steel bridge response. Forces and moments in the superstructure and the substructure induced by thermal movements and time-dependent loads were not negligible and should be considered in the design process.

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Breen, John E., Michael E. Kreger, Christopher D. White, and Gordon C. Clark. "Field evaluation and model test of a composite wing-girder bridge." Canadian Journal of Civil Engineering 14, no. 6 (December 1, 1987): 753–62. http://dx.doi.org/10.1139/l87-113.

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This paper presents the key observations and conclusions from the evaluation of an innovative "loose-fit" composite, post-tensioned concrete wing-girder bridge proposed for an elevated interstate highway expansion in an urban environment. The evaluation program included both testing to destruction of a 1/2-scale model of a partial span as well as construction monitoring and field testing at service load levels of a full-scale prototype two-span bridge. Results of both construction measurements and loading tests were compared with analytical predictions. Laboratory tests showed the composite behavior of the wing-girder joint to be fully effective and a high level of load transfer between wings to be present. Recommendations for modification of the prototype design are made to improve constructibility, durability, structural performance, and economy. Key words: box girder, bridge, post-tensioned, prestressed concrete, reinforcement, stresses, temperature, tendons.

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Asso, Rebecca, Marco Domaneschi, Giuseppe C. Marano, Fabrizio Palmisano, and Giuseppe Palombella. "Behavior of Half-Joints: Design and Simulation of Laboratory Tests." Infrastructures 7, no. 12 (November 24, 2022): 160. http://dx.doi.org/10.3390/infrastructures7120160.

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European countries are characterized by an extensive infrastructural network, mainly built around the 1960s and 1970s. In that period prefabrication processes were starting to gain ground, and one of the most spread and studied typologies of bridges was constituted by reinforced or prestressed concrete decks. Those structures have gone through years of service, which caused the inevitable degradation of the materials and relevant deterioration of structural elements. Moreover, the design and construction processes of that period have soon become obsolete, and the knowledge relative to the influence of detailing increased significantly. One particular element that has been commonly used has been the half-joint, which is easy to prefabricate and has a strategic impact. However, in recent years this solution is showing critical aptitudes in resisting structural degradation and material decay. In addition, structural health monitoring (SHM) strategies are gaining attention since they are a very useful tool for gathering information on the current state of the structure and then for evaluating intervention plans to improve safety. Indeed, existing bridges, despite their working age, are still crucial to the development and sustainability of community life, and their decommissioning would be an act of critical impact on the communities (e.g., economy, logistics, sustainability). This contribution presents the design and the simulation of laboratory tests on half-joints of reinforced concrete beams that will be developed at the Politecnico di Torino in a subsequent step of the present research. They are designed to test and compare different monitoring techniques along with different steel reinforcement configurations. Specifically, the first part of the manuscript focuses on a review of the literature regarding the design, strengthening, and monitoring of half-joints. Subsequently, the laboratory setup to test half-joints is presented along with the numerical simulation to support the experimental design. Laboratory tests will involve the use of monitoring systems to detect the local response of the system and also to propose new solutions specifically for this type of connection using emerging technologies. Numerical collapse simulations show the effect of different reinforcement configurations and the collapse behavior.

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Liu, Yin, Hong Wei Huang, and Dong Mei Zhang. "Influence of Segment Design of Shield Tunnel on the Magnitude of Joint Opening." Advanced Materials Research 160-162 (November 2010): 698–703. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.698.

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It is obviously a simplification to consider the tunnel lining as uniformly permeable.In reality it is more likely that there are specific leaks assocoated with segmental lining joints. In the case of in situ concrete linings, construction joints can provide leakage paths, accounting for most of the water leakage. In this paper, based on the mechanical model of segment joint, the analytical expression of magnitude of joint opening was developed, in light of which, the occurrence of water leakage through the joint system can be judged. Taking the metro line No.1 in Shanghai as an example, effects of such parameters as joint flexural stiffness, bolt location, bolt stiffness, bolt prestress, etc. on the magninitude of the joint opening were analyzed respectively through the analytical solution. The results not only help us realize the influence mechanism of segment design on the magnitude of joint opening of the segmental linings, but also provide the guidance for waterproof design of the shield tunnel.

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Jin, Zhiyi, Taiyue Qi, Xiao Liang, Bo Lei, Yangyang Yu, Yuchen Gong, and Weidu Ji. "Radial Joints Behavior of a Precast Asymmetric Underpass Induced by Long-Term Loads of Ground Vehicles." Shock and Vibration 2020 (March 23, 2020): 1–11. http://dx.doi.org/10.1155/2020/5952796.

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With the rapid development of the urbanization, many underpasses are designed and constructed in big cities to alleviate the huge traffic pressure. The construction method has been changed from traditional on-site concrete pouring technology to prefabricated assembly technology. However, this change will inevitably bring out some new problems to be studied such as the behaviour of the radial joints. In this study, the numerical simulation model of Moziqiao precast and assemble underpass with large asymmetric cross section was constructed by using the ABAQUS software to study the transient response of the underpass induced by ground surface dynamic load. Based on the similarity theory a 1/10 scaled model test was carried out to study the long-term radial joint behaviour of the underpass considering the prestress loss during the 2000 000 loading cycles. The results transient dynamic response from computed and tested was compared in terms of acceleration. The comparison showed that the transient response accelerations have good consistency. The results of the physical model test were analysed in terms of joint opening, closure, and slipping. The accumulative joint opening was closely correlated to the prestress level, and the joint opening at different prestress levels increased with the loss of the prestress. The joints closure decreased with the increase of the previous accumulative color value. The joint slipping mainly attributed to the slipping of the top segment. Both the opening and slipping of the joints at RJ 1 were larger than that of RJ3 due to the wider span of RJ1, which reflected an asymmetric effect. This study revealed the long-term accumulative behaviour of the radial joints, which convinced us that the long-term accumulative deformation of the joints should be taken into consideration during the design stage for similar projects.

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Han, Sun-Jin, Jae-Hoon Jeong, Hyo-Eun Joo, Seung-Ho Choi, Seokdong Choi, and Kang Su Kim. "Flexural and Shear Performance of Prestressed Composite Slabs with Inverted Multi-Ribs." Applied Sciences 9, no. 22 (November 17, 2019): 4946. http://dx.doi.org/10.3390/app9224946.

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Half precast concrete slabs with inverted multi-ribs (Joint Advanced Slab, JAS), which enhance composite performance between slabs by introducing shear keys at connections between the slabs and improve structural performance by placing prestressing tendons and truss-type shear reinforcements, have recently been developed and applied in many construction fields. In this study, flexural and shear tests were performed to verify the structural performance of JAS members. Towards this end, two flexural specimens and four shear specimens were fabricated, and the presence of cast-in-place concrete and the location of the critical section were set as the main test variables. In addition, the flexural and shear performance of the JAS was quantitatively evaluated using a non-linear flexural analysis model and current structural design codes. Evaluation results confirmed that the flexural behavior of the JAS was almost similar to the behavior simulated through the non-linear flexural analysis model, and the shear performance of the JAS can also be estimated appropriately by using the shear strength equations presented in the current design codes. For the JAS with cast-in-place concrete, however, the shear strength estimation results differed significantly depending on the way that the shear contributions of the precast concrete unit and cast-in-place concrete were calculated. Based on the analysis results, this study proposed a design method that can reasonably estimate the shear strength of the composite JAS.

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Liu, Zhengyu, Ali A. Semendary, and Brent M. Phares. "Numerical investigation on early age performance of ultra-high-performance concrete shear keys between an adjacent prestressed concrete box beams." Advances in Structural Engineering 25, no. 3 (December 7, 2021): 511–21. http://dx.doi.org/10.1177/13694332211056111.

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Adjacent precast prestressed concrete box beam bridges have been widely utilized for decades and have shown satisfactory performance. However, significant issues regarding to the longitudinal shear key cracking have been noted by bridge maintenance personnel. The cracks are typically initiated at beam-shear key interfaces due to shrinkage and temperature and propagate due to applied load. Recently, ultra-high-performance concrete (UHPC) was employed in the shear keys with the anticipation to prevent joint cracking. Although the field-collected data at early age from bridge utilizing UHPC shear keys indicated promising performance, the results only reflected the early age joint behavior at locations which were instrumented during the field test. In the current study, a 3D finite element (FE) model was developed to calculate the early age stresses due to shrinkage and temperature. The results indicated that the UHPC material associated with a specific shear key configuration created a “self-locked” phenomenon that generated compression on the upper level shear key. The early age tensile stress during the first couple of days near the end of the joint was relatively small compared to the tensile strength of UHPC material. Although the interface had sufficient capacity to resist the early age stresses, it is still a critical component and needs to be designed with sufficient capacity.

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Castilho, V. C., and M. C. V. Lima. "Analysis and cost optimisation of prestressed concrete joists in beam-block floors." Structural Concrete 9, no. 3 (September 2008): 143–51. http://dx.doi.org/10.1680/stco.2007.00019.

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Castilho, V. C., and M. C. V. Lima. "Analysis and cost optimisation of prestressed concrete joists in beam-block floors." Structural Concrete 9, no. 3 (September 2008): 143–51. http://dx.doi.org/10.1680/stco.2008.9.3.143.

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HAMAHARA, Masayuki, Naoto HARAI, Yoshihiro SAKANASHI, Tsuyoshi FUKUI, and Ryuiciroh UCHIDA. "EFFECTS OF ASPECT RATIO OF JOINT CORES ON ULTIMATE STRENGTH OF PRESTRESSED CONCRETE BEAM-INTERIOR COLUMN JOINT ASSEMBLIES." Journal of Structural and Construction Engineering (Transactions of AIJ) 75, no. 652 (2010): 1129–37. http://dx.doi.org/10.3130/aijs.75.1129.

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SAKATA, Hiroyasu, Toshifumi NAKAI, Tomoaki SUGIYAMA, Akira WADA, and Yasuhiro MATSUZAKI. "STUDY ON MECHANICAL BEHAVIOR OF BEAM-COLUMN-FOUNDATION IN FRAME WITH PRESTRESSED CONCRETE MILD-PRESS-JOINT." Journal of Structural and Construction Engineering (Transactions of AIJ) 73, no. 624 (2008): 307–15. http://dx.doi.org/10.3130/aijs.73.307.

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Nishiyama, Minehiro, and Yue Wei. "Effect of Post-Tensioning Steel Anchorage Location on Seismic Performance of Exterior Beamto- Column Joints for Precast, Prestressed Concrete Members." PCI Journal 52, no. 2 (March 1, 2007): 18–30. http://dx.doi.org/10.15554/pcij.03012007.18.30.

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SAKATA, Hiroyasu, Hiroyuki KUBOYAMA, Tomoaki SUGIYAMA, Makoto IKEZAWA, Akira WADA, Yasuhiro MATUZAKI, Shigemi MACHIDA, and Kiyoshi NAKANO. "EXPERIMENTAL STUDY ON BEAM-COLUMN JOINT OF DAMAGE CONTROLLED PRECAST-PRESTRESSED CONCRETE FRAME WITH P/C MILD-PRESS-JOINT." Journal of Structural and Construction Engineering (Transactions of AIJ) 70, no. 588 (2005): 141–47. http://dx.doi.org/10.3130/aijs.70.141_1.

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SHIRAYAMA, Takashi, Nozomi SATOU, and Shigetaka TOKUTAKE. "STIFFNESS AND STRENGTH EVALUATION OF PRESTRESSED TIMBER BEAM WITH UNBONDED STEEL STRAND AND REINFORCED CONCRETE BEAM-COLUMN JOINT." Journal of Structural and Construction Engineering (Transactions of AIJ) 87, no. 796 (June 1, 2022): 544–55. http://dx.doi.org/10.3130/aijs.87.544.

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Yang, Sanqiang, Zeyu Dai, Xiang Yang, Tong Zhou, and Lanjun Tang. "Analysis of Bonding Performance of Grouting Corrugated Pipes in Fabricated Bridge Structures." Advances in Materials Science and Engineering 2022 (May 23, 2022): 1–9. http://dx.doi.org/10.1155/2022/8086155.

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Prefabricated bridge structures are highly popularized due to their simple construction, economy, and environmental protection. Relying on the prefabricated prestressed concrete box girder bridge project of Rongwu Expressway Section 6, this research studies the structural mode of grouting bellows and the mechanical properties of joints under different design parameters. The laboratory test was carried out by adjusting the two design parameters of aperture ratio and material properties, and the test data of joint mechanical properties under the influence of different factors were analyzed with the help of grey relational theory. The result goes like this: when the size of the metal bellows is certain, the aperture ratio becomes smaller, the internal space of the specimen becomes smaller, the internal restraint is weakened, and the bonding performance of the reinforcement becomes worse. When D/d = 2.6, the performance of the specimen is better. Comparing the grouting materials with different characteristics, the performance of the metal bellows specimen increases with the enhancement of the properties of the grouting material, but as the aperture ratio becomes smaller, the influence of the grouting material on the performance of the specimen becomes weaker. The comprehensive analysis is carried out with the grey relational theory and the correlation degree of the influence of the two factors on the specimen, and the correlation degrees γ 1 = 0.66 and γ 2 = 0.67 are obtained. Both of them have a strong correlation with the performance of the specimen, and the degree of influence is roughly similar. Based on the engineering application requirements and related design requirements, the construction method of selecting 100 MPa high-strength grouting material which is higher than the general standard, 65 mm corrugated pipe, and 22 mm steel bar is finally put forward. This research relies on engineering theoretical and experimental studies, which provide important theoretical support and technical guarantee for the research on the joint structure of prefabricated structures.

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Peiris, Abheetha, Charlie Sun, and Issam Harik. "Lessons learned from six different structural health monitoring systems on highway bridges." Journal of Low Frequency Noise, Vibration and Active Control 39, no. 3 (December 10, 2018): 616–30. http://dx.doi.org/10.1177/1461348418815406.

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Structural health monitoring has been utilized in numerous ways to investigate the performance and integrity of highway bridges. This paper highlights the use of six structural health monitoring systems, which were deployed to monitor distinct behaviors on six bridges in Kentucky. The structural health monitoring systems are as follows: (1) Over-height truck impact detection and monitoring on the I-64 over US 60 bridge, (2) Barge impact detection and monitoring on northbound US 41 over the Ohio River, (3) effectiveness of carbon fiber-reinforced polymer retrofit evaluation based on prestressed concrete I-girder crack movement on the I-65 elevated expressway in Louisville, (4) effect of thermal loads on bridge substructure evaluation on KY 100 over Trammel Creek, (5) thermal movement of expansion joints evaluation on eastbound I-24 over the Tennessee River, and (6) crack growth monitoring on steel floor beam on I-275 over the Ohio River. The deployment of the different structural health monitoring systems on Kentucky bridges has provided valuable insights on their planning, implementation, and maintenance, which can be applied on future structural health monitoring projects. While several of the projects have proved immensely successful, with some still being continuously monitored, others, due to numerous complications, have met with only limited success. The best return on investment was realized from structural health monitoring instrumentation that was focused and limited in scope. The successful structural health monitoring systems had continuous communication between all stakeholders during planning, implementation, and monitoring phases of the projects. Following implementation, the availability of contingency funds through the funding source, to replace/upgrade sensors and networking equipment and costs for reprogramming and reinstallation outside of regular maintenance costs, was also important for the structural health monitoring to be successful.

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Journal articles on the topic 'Prestressed concrete construction Joints'

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