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Journal articles on the topic 'Post-tensioning construction'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Granello, Gabriele, Marco Broccardo, Alessandro Palermo, and Stefano Pampanin. "Fragility-based methodology for evaluating the time-dependent seismic performance of post-tensioned timber frames." Earthquake Spectra 36, no. 1 (January 28, 2020): 322–52. http://dx.doi.org/10.1177/8755293019878196.

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Since 2010, the construction of post-tensioned wooden buildings (Pres-Lam) has been growing rapidly worldwide. Pres-Lam technology combines unbonded post-tensioning tendons and supplemental damping devices to provide moment capacity to beam–column, wall–foundation, or column–foundation connections. In low seismic areas, designers may choose not to provide additional damping, relying only on the post-tensioning contribution. However, post-tensioning decreases over time due to creep phenomena arising in compressed timber members. As a consequence, there is a reduction of the clamping forces between the elements. This reduction affects the seismic response of Pres-Lam buildings in the case of low- and high-intensity earthquakes. Therefore, understanding and accounting for the post-tensioning losses and their uncertainty are paramount for a robust assessment of the safety of Pres-Lam constructions. So far, however, there have been no comprehensive studies which tackle the overall seismic performance of such systems in the presence of time-varying post-tension losses and the associated uncertainty. This study tackles this research gap by introducing a comprehensive seismic evaluation of Pres-Lam systems based on time-dependent fragility curves. The proposed fragility analysis is specifically designed to account systematically for time-varying post-tension losses and the related uncertainty. The method is applied to two case studies, designed, respectively, with and without supplemental damping devices. In terms of structural performance, results show that the use of additional dissipaters mitigates the effect of post-tensioning loss for earthquakes of high intensity. Conversely, performance under low-intensity earthquakes is strongly dependent on the post-tensioning value, as the reduction of stiffness due to the anticipated rocking motion activation would lead to damage to non-structural elements.

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2

Vill, Markus, Eva M. Eichinger, and Johann Kollegger. "Assessment of Damaged Post-Tensioning Tendons." Structural Engineering International 16, no. 1 (February 2006): 44–48. http://dx.doi.org/10.2749/101686606777962648.

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3

Di Cesare, Antonio, Felice Carlo Ponzo, Nicla Lamarucciola, and Domenico Nigro. "Experimental seismic response of a resilient 3-storey post-tensioned timber framed building with dissipative braces." Bulletin of Earthquake Engineering 18, no. 15 (October 6, 2020): 6825–48. http://dx.doi.org/10.1007/s10518-020-00969-y.

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Abstract With the increased number of multi-storey buildings in seismic areas, research efforts have been focused on developing earthquake resilient systems, such as low-damage techniques based on the combination of post-tensioning and dissipating devices. This paper describes the experimental study performed on a 3-storey post-tensioned timber framed (Pres-Lam) building equipped with energy dissipating systems. The testing project consisted of three phases adopting different configurations of the experimental model: (1) post-tensioning to beam-column joints only, (2) post-tensioning and dissipative rocking mechanisms and (3) post-tensioning and dissipative braces. The main objective of this paper is to experimentally investigate on the seismic response of a large-scale specimen with dissipative braces located in high seismic area, considering construction details similar to those adopted in practical applications. During the experimental campaign, the test frame was subjected to more than one hundred ground motions considering a set of seven spectra-compatible earthquakes at increasing intensity levels. The dissipating bracing system with external replaceable hysteretic dampers improves the seismic resilience of multi-storey Pres-Lam buildings, showing inter-storey drift comparable to those with rocking walls, with full recentring capability and without structural damages or post-tensioning losses through seismic tests.

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4

subcommittee on Anderson Post-tensi. "RECOMMENDATIONS FOR DESIGN AND CONSTRUCTION BY ANDERSON POST-TENSIONING METHOD." Doboku Gakkai Ronbunshu, no. 378 (1987): 47–48. http://dx.doi.org/10.2208/jscej.1987.378_47.

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5

Guo, Quanquan, Zhu Li, and Lian Duan. "Automatic Post-Tensioning in Prestressed Concrete Structures." Structural Engineering International 14, no. 1 (February 2004): 37–41. http://dx.doi.org/10.2749/101686604777964242.

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6

El-Zohairy, Ayman, and Hani Salim. "Parametric study for post-tensioned composite beams with external tendons." Advances in Structural Engineering 20, no. 10 (January 8, 2017): 1433–50. http://dx.doi.org/10.1177/1369433216684352.

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Strengthening of bridge superstructures composite beams with external post-tensioned tendons is a good technique for strengthening the existing structures. In this study, a numerical model is illustrated to study the nonlinear simulation of composite beams stiffened with externally post-tensioned tendons. The accuracy of the developed numerical model is validated using comparisons between the numerical and existing test data. The influence of various strengthening parameters is investigated, which include draped versus straight tendons, tendon length, the effect of post-tensioning on reinstating the flexural behavior of an overloaded beam, tendon eccentricity, and the degree of shear connection. A good agreement between the proposed model and the test data is obtained. The results demonstrate that at the same tendon eccentricity, the trapezoidal profile shows better behavior for the strengthened beams. However, more ductility is obtained when using the straight tendon profile. Applying post-tensioning through the beam of full length helps to reduce the creation of fatigue cracks, which always start at stress raisers, and subsequently increases the fatigue life of the composite beam. Also, the external post-tensioning effectively maintains the flexural behavior of the overloaded strengthened beam after unloading in comparison to the un-strengthened beam. It is observed that 80% degree of shear connection or higher is recommended to obtain the desired performance of the external post-tensioning force for strengthening composite beams.

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7

Dunker, Kenneth F., F. Wayne Klaiber, and Wallace W. Sanders. "Post‐Tensioning Distribution in Composite Bridges." Journal of Structural Engineering 112, no. 11 (November 1986): 2540–53. http://dx.doi.org/10.1061/(asce)0733-9445(1986)112:11(2540).

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8

Hansen, Jenna, Kromel Hanna, and Maher K. Tadros. "Simplified transverse post-tensioning construction and maintenance of adjacent box girders." PCI Journal 57, no. 2 (March 1, 2012): 64–79. http://dx.doi.org/10.15554/pcij.03012012.64.79.

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9

Dueñas Puentes, Diego Ernesto, and Maritzabel Molina Herrera. "Wobble friction coefficient in post-stressed concrete." Ingeniería e Investigación 27, no. 3 (September 1, 2007): 16–23. http://dx.doi.org/10.15446/ing.investig.v27n3.14841.

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This work was aimed at establishing a wobble friction coefficient (K) from records regarding some post-stressed bridges built in Colombia. Such records were arranged and analysed together with stress diagrams resulting from the corresponding plans, calculations and reports. Suitable records were produced from this review to make the analysis. Once the records had been selected, the probable wobble friction coefficient (K) was then calculated for each case and this coefficient was related to the length of the cable and the total area of the strands composing the cable. These records and their results were subsequently grouped according to the type of bridge to produce a wobble friction coefficient (K) for each specific structure. The study indicated that the wobble friction coefficient was lower than that indicated by the Colombian Seismic Bridge Design Code, Instituto Nacional De Vías, 1995]. The influence of tensioning equipment, materials and labour suggested a format for recording tensioning to reduce inaccuracy when readings are being taken. A reduction in the costs of tensioning would arise from taking the forgoing into account.

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10

Stein, Abigail, Aled R. Hughes, Rick Deschamps, and Brian D. Barkauskas. "Wanapum Dam repaired using post-tensioning anchors." DFI Journal - The Journal of the Deep Foundations Institute 12, no. 2 (May 4, 2018): 81–93. http://dx.doi.org/10.1080/19375247.2018.1562599.

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11

Tyvand, James, and Arthur T. Blachly. "Foamed Plastic Absorbs Staged Post‐Tensioning Deflections." Journal of Construction Engineering and Management 112, no. 4 (December 1986): 582–87. http://dx.doi.org/10.1061/(asce)0733-9364(1986)112:4(582).

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12

Eichinger, E. M., Th Petraschek, and J. Kollegger. "Ultimate strength of damaged post-tensioning tendons." Structural Concrete 4, no. 3 (September 2003): 117–24. http://dx.doi.org/10.1680/stco.2003.4.3.117.

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13

Eichinger, E. M., Th Petraschek, and J. Kollegger. "Ultimate strength of damaged post-tensioning tendons." Structural Concrete 4, no. 3 (September 2003): 117–24. http://dx.doi.org/10.1680/stco.4.3.117.37640.

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14

Cupać, Jagoda, Christian Louter, and Alain Nussbaumer. "Post-tensioning of glass beams: Analytical determination of the allowable pre-load." Glass Structures & Engineering 6, no. 2 (March 30, 2021): 233–48. http://dx.doi.org/10.1007/s40940-021-00150-0.

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AbstractThe effectiveness of post-tensioning in enhancing the fracture resistance of glass beams depends on the level of compressive pre-stress introduced at the glass edge surface that will in service be exposed to tensile stresses induced by bending. Maximum pre-load that can be applied in a post-tensioned glass beam system, yielding maximum compressive pre-stress, is limited by various failure mechanisms which might occur during post-tensioning. In this paper, failure mechanisms are identified for a post-tensioned glass beam system with a flat stainless steel tendon adhesively bonded at the bottom glass edge, including the rupture of the tendon, glass failure in tension and adhesive/glass failure in the load introduction zone. Special attention is given to the load introduction failure given that the transparent nature of glass limits the use of vertical confinement usually applied in concrete. An analytical model for determination of the allowable pre-load in post-tensioned glass beams is proposed, based on the model applied for externally post-tensioned concrete beams. The model is verified with the results of a numerical model, showing good correlation, and applied in a parametric study to determine the influence of various beam parameters on the effectiveness of post-tensioning glass beams.

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15

Patil, Mayur V., and Dr S. R. Parekar. "Nonlinear Analysis of External Post-Tensioning anchorage of Concrete Segment." International Journal for Research in Applied Science and Engineering Technology 11, no. 1 (January 31, 2023): 1010–20. http://dx.doi.org/10.22214/ijraset.2023.48754.

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Abstract: Precast concrete segmental bridges (PCSBs) have been the most common design technology used in the last decades. In these studies Non-linear structural performances of externally prestressed, precast concrete segmental bridges (PCSB). PCSBs with externally prestressed tendons have become very popular in construction because of economical and safety reasons, fast and practical construction, and outstanding serviceability. External tendons technique is widely used because it allows to inspect the cables and to replace them or to reinforce the tendons in case of damage while such kinds of actions are difficult to be taken in case of internal prestressing. It is widely recognized that segmental bridges have better durability, lower life-cycle costs and higher quality for maintenance than other types of bridges. However, there is lack of reliable computational model for analyzing behavior of post-tensioned PCSBs. Experimental analysis of bridge segment required more cost, time and effort for the analysis and also take cake of quality of material, cast process, curing, and testing. This research presents the results of stress and strain state of the local bearing area caused by a Prestressed cable anchor in reinforced concrete bridge segment. Nonlinear analysis of anchorage and rebar, concrete segment can be carried out by analytical solution calculated with the reference of ACI 318/19. ANSYS software is used for model and analyze the structure. The analysis process was carried out in 3 types : linear elastic analysis, nonlinear elastic analysis, and nonlinear analysis considering the destruction of concrete, and the value is compared with ANSYS software ( static structure).

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16

Lissel, S. L., N. G. Shrive, and J. Gilliland. "Design of carbon fibre reinforced polymer post-tensioned masonry diaphragm retaining walls." Canadian Journal of Civil Engineering 32, no. 3 (June 1, 2005): 579–94. http://dx.doi.org/10.1139/l05-008.

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Two masonry diaphragm retaining walls were constructed on the University of Calgary campus and post-tensioned with carbon fibre reinforced polymer (CFRP) tendons. As these are the first masonry diaphragm walls post-tensioned with CFRP tendons outside of a laboratory, one objective in the design was to provide a wide margin of safety, especially concerning the effective, or sustained, prestressing force and losses. The tendons are unbonded, so guidance chairs were placed during construction to meet the requirements of the clauses expected in the next edition of the Canadian masonry design code. Research has shown that the strength of masonry to resist shear in the webs is enhanced by the normal stress induced by post-tensioning, so this was used in the design. The webs of the walls interlock with the flanges, imposing restrictions on the spacing of the webs. A centre-to-centre spacing of 500 mm was selected, with one tendon per cavity. The design of the walls and capping beams is detailed, and the construction sequence and monitoring program are described briefly. Key words: post-tensioning, masonry, retaining walls, design, FRP tendons, corrosion free

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17

Lenzi, Maurizio, and Federico Zoli. "Step by Step Post-Tensioning: Influence of the Friction Losses." Structural Engineering International 17, no. 1 (February 2007): 79–85. http://dx.doi.org/10.2749/101686607779938741.

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18

Schokker, A. J., John E. Breen, and M. E. Kreger. "Simulated Field Testing of High Performance Grouts for Post-Tensioning." Journal of Bridge Engineering 7, no. 2 (March 2002): 127–33. http://dx.doi.org/10.1061/(asce)1084-0702(2002)7:2(127).

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19

Schmidt, Lewis C., and Hewen Li. "Shape Formation of Deployable Metal Domes." International Journal of Space Structures 10, no. 4 (December 1995): 189–94. http://dx.doi.org/10.1177/026635119501000401.

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This paper presents a new approach for forming and erecting deployable metal domes. The approach is basically one where the whole structure is assembled initially at ground level in an essentially flat condition. By the use of appropriate post-tensioning, the space structure can be erected and shaped simultaneously. Based on previous studies on deployment principle and geometric models, this paper present an approach to investigate the appropriate way of post-tensioning for the shape formation and erection of the metal domes by means of finite element analyses. An example is given to illustrate the main steps in shape formation of the deployable metal domes, and the results of the example show that this new approach is reliable and feasible. Potentially, the procedure can offer economies over traditional methods of construction of such structures.

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20

Moon, J. H., Y. C. Choi, J. H. Lim, L. H. Lee, K. H. Kwon, and K. S. Kim. "Post-Tensioned Interior Precast Wide Beam—Column Connections Subjected to Lateral Loading." Advances in Structural Engineering 10, no. 5 (October 2007): 487–500. http://dx.doi.org/10.1260/136943307782417654.

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The post-tensioned precast concrete system (PPS) developed in this study consists of U-shaped precast wide beams and concrete columns, where the continuity of wide beam-column joint is provided with the cast-in-place concrete on the U-shaped precast wide beam and the post-tensioning to the beam after casting of slab. The PPS structure can overcome the defect of discontinuity in the connections of precast members using cast-in-place concrete on precast members, and complement the low sectional efficiency of wide beam by applying the post-tensioning. In this study, an experimental investigation was performed with three half-scale specimens of interior connection fabricated employing PPS structure. Specifically, this paper presents the response of PPS interior beam-column joint subjected to cyclic lateral loading and evaluates the relevance of the beam-to-column width ratio criteria specified in ACI 318–05. The test results indicate that the PPS specimens can resist properly seismic loads maintaining overall structural integrity.

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21

Lissel, Shelley L., Nigel G. Shrive, and Adrian W. Page. "Shear in plain, bed joint reinforced, and post-tensioned masonry." Canadian Journal of Civil Engineering 27, no. 5 (October 1, 2000): 1021–30. http://dx.doi.org/10.1139/l00-057.

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Masonry is cost competitive on a life cycle basis with other forms of construction, and should therefore be considered as a structural material more frequently by both architects and engineers. Post-tensioned geometric sections of masonry are structurally efficient wall systems. Post-tensioning with carbon fibre reinforced polymer (CFRP) is an attractive solution to potential corrosion problems with unbonded tendons. Tests on CFRP post-tensioned diaphragm walls have revealed that shear strength in prestressed masonry is an area deserving more study and improvement. The tests also showed that the bonding pattern of the masonry at the web-flange junction can have a substantial effect on the resulting strength of that connection. A test series to evaluate the effects of prestress force and bed reinforcement on shear strength has been carried out and a summary of the results is presented here. Tests to determine the effect of bonding pattern on the strength of the web-flange connection have also been conducted.Key words: post-tensioning, masonry, shear, FRP tendons, corrosion-free.

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22

Ma, Zhongguo (John), Mohsen A. Saleh, and Maher K. Tadros. "Optimized Post-Tensioning Anchorage in Prestressed Concrete I-Beams." PCI Journal 44, no. 2 (March 1, 1999): 56–73. http://dx.doi.org/10.15554/pcij.03011999.56.73.

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23

Radwan, lnmar, and Robert Y. Liang. "Transverse Post-tensioning Design of Precast Concrete Multibeam Deck." PCI Journal 52, no. 4 (July 1, 2007): 84–92. http://dx.doi.org/10.15554/pcij.07012007.84.92.

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24

Elsener, B. "Long-term monitoring of electrically isolated post-tensioning tendons." Structural Concrete 6, no. 3 (July 2005): 101–6. http://dx.doi.org/10.1680/stco.2005.6.3.101.

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25

Granello, Gabriele, Claude Leyder, Alessandro Palermo, Andrea Frangi, and Stefano Pampanin. "Design Approach to Predict Post-Tensioning Losses in Post-Tensioned Timber Frames." Journal of Structural Engineering 144, no. 8 (August 2018): 04018115. http://dx.doi.org/10.1061/(asce)st.1943-541x.0002101.

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26

De Lorenzis, Laura, Francesco Micelli, and Antonio La Tegola. "Fiber-Reinforced Polymer for Structural Strengthening: Post-Tensioning of Steel Silos." Structural Engineering International 13, no. 2 (May 2003): 124–27. http://dx.doi.org/10.2749/101686603777964766.

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27

Hassan, M. M., A. O. Nassef, and A. A. El Damatty. "Surrogate Function of Post-Tensioning Cable Forces for Cable-Stayed Bridges." Advances in Structural Engineering 16, no. 3 (March 2013): 559–78. http://dx.doi.org/10.1260/1369-4332.16.3.559.

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28

Rui, Zhang, and Wen Liang Lu. "Experimental Study on Transversal Stress of Precast Simply Supported Box Girder during the Pre-Tensioning and Initial Tensioning Stages." Advanced Materials Research 243-249 (May 2011): 1689–93. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1689.

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Experimental research was conducted on the transverse stress of 32m post-tensioned precast simply supported concrete box girder with ballastless track. Vibrating wire strain gauges were embedded in the key sections to monitor the concrete transverse strain. The concrete strain development law was analyzed. The monitored results showed that there were low transverse tensile stresses and the cracking resistance of the girder was enough during pre-tensioning stage. The research findings provided effective experimental data for design and construction quality control.

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29

Aziz, Mohamad Abdel, George Abdel-Sayed, Faouzi Ghrib, Nabil F. Grace, and Murty K. S. Madugula. "Analysis of concrete beams prestressed and post-tensioned with externally unbonded carbon fiber reinforced polymer tendons." Canadian Journal of Civil Engineering 32, no. 6 (December 1, 2005): 1138–51. http://dx.doi.org/10.1139/l05-071.

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Fiber reinforced polymer (FRP) tendons are being increasingly used nowadays in prestressing and (or) post-tensioning concrete structures. However, designers are faced with lack of practical analysis procedure that leads to proper evaluation of their structural performance, especially when bonded prestressing is combined with unbonded post-tensioning. This paper presents an analytical procedure for these beams. It examines the load–defelction characteristics and proceeds to estimate the ultimate load carrying capacity by taking into consideration the change of stress that occurs in the externally unbonded tendons during different stages of loading. The analytical procedure uses the concept of effective moment of inertia of concrete beams. The equations used are developed by ACI Committee 440, the Intelligent Sensing for Innovative Structures (ISIS) Canada Research Network, and the Comité Euro-International du Béton - Fédération International de la Précontrainte (CEB-FIP), for calculating the deflection of beams reinforced with carbon fiber reinforced polymer (CFRP) tendons. Finite element analyses have been conducted to verify the proposed analytical method. Two experimental programs were used to validate the proposed analytical method. The experimental findings of two box beams reinforced with bonded and unbonded external tendons are compared with finite element analyses and the analytical results. A full-scale test for an internally and externally prestressed double-T beam was undertaken at Construction Technology Laboratories Inc., Skokie, Illinois. The results from this experimental work were used to validate the analytical procedure.Key words: bonded CFRP tendons, concrete, post-tensioning, unbonded CFRP tendons.

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30

Karbaschi, M. E., G. Dehdashti, and A. Fiouz. "Ultimate Load of Barrel-Vault Space Trusses Shaped by Post-Tensioning." International Journal of Space Structures 24, no. 3 (September 2009): 179–89. http://dx.doi.org/10.1260/026635109789867652.

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This paper presents the results of nonlinear analysis to predict the ultimate load of a barrel-vault space truss shaped by post-tensioning. Experimental study on shape formation, load tests to determine the ultimate load of the post-tensioned barrel-vault space truss and individual compression tests on members to determine their buckling load have been carried out in previous research. The nonlinear analysis carried out herein uses the reduced stiffness of various members according to member test results to determine the ultimate load behavior of the model barrel-vault space truss. The paper also presents the ultimate load behavior of large-span barrel-vault space trusses, taking into account the buckling of their members. As a result, it is shown that these structures can be used to cover large spans with sufficient structural stiffness. Lastly, some design aid diagrams are proposed.

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31

Roschke, Paul N., and Masamichi Inoue. "Effects of Banded Post‐Tensioning in Prestressed Concrete Flat Slab." Journal of Structural Engineering 117, no. 2 (February 1991): 563–83. http://dx.doi.org/10.1061/(asce)0733-9445(1991)117:2(563).

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32

Choi, Eun Suk, Jung Woo Lee, Chang Joh, Jong Won Kwark, Jee Sang Kim, and Yoon Seok Choi. "A Local Compression Tests of UHPC Anchor Blocks for Post-Tensioning Tendons." Key Engineering Materials 525-526 (November 2012): 561–64. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.561.

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In the application of Ultra High Performance Concrete (UHPC) to PSC girders by using the post-tensioning system, the high strength and ductility of UHPC in tension can be exploited to substitute the confined reinforcing bars which control the rupture around the anchorage device. The exploitation of such properties is expected to simplify the reinforcing details around the anchorage zone. Taking advantage of UHPC can downsize a cross section with the attributes of high compression and tensile strength. This paper reports the local behavior of UHPC anchor block under compression. Test specimens were made based on mix proportion of K-UHPC (KICT-Ultra High Performance Concrete) developed by the Korea Institute of Construction Technology (KICT). The performance of the anchor block was evaluated according to ETAG-013 (European Technical Agreement Guide No.13) of EOTA (European Organization for Technical Approvals). As the results of the experiment, it is found that the details and reinforcement of UHPC anchorage zone can be simplified with the interconnection effect and the high intensity of the matrix itself.

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33

Boote, Scott, and Alex Lynes. "Stone as a structural material. Part 3: Post-tensioned stone structures." Structural Engineer 98, no. 8 (August 1, 2020): 22–28. http://dx.doi.org/10.56330/fzda2725.

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To utilise stone’s high ratio of compressive to tensile strength to maximum effect, stone structures can be compressed using tensioned cables or bars. Post-tensioned stone increases the failure load of stone in bending, but also the stiffness of a structure by reducing joint cracking. This method of construction is widely used for concrete structures, but the advantages of using similar techniques with stone are only just being realised. This article covers the reasons for post-tensioning stone, the advantages of doing so, and presents a series of projects that demonstrate the evolution and development of our expertise and understanding at Webb Yates.

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34

Mietz, J., A. Burkert, A. Burkert, and G. Eich. "Investigations on the protection effect of filling materials for post-tensioning systems under construction conditions." Materials and Corrosion 57, no. 11 (November 2006): 843–51. http://dx.doi.org/10.1002/maco.200603986.

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35

Taha, Mutaz M. M., and Yanmin Jia. "Stress on simply supported bridge girders made continuous by full post-tensioning under static load." Bridge Structures 14, no. 2-3 (March 26, 2019): 81–94. http://dx.doi.org/10.3233/brs-180139.

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36

Schokker, Andrea J., H. R. Hamilton, and Morris Schupack. "Estimating Post-Tensioning Grout Bleed Resistance Using a Pressure-Filter Test." PCI Journal 47, no. 2 (March 1, 2002): 32–39. http://dx.doi.org/10.15554/pcij.03012002.32.39.

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37

Grace, Nabil F., Elin A. Jensen, Tsuyoshi Enomoto, Vasant A. Matsagar, Eslam M. Soliman, and Joseph Q. Hanson. "Transverse diaphragms and unbonded CFRP post-tensioning in box-beam bridges." PCI Journal 55, no. 2 (March 1, 2010): 109–22. http://dx.doi.org/10.15554/pcij.03012010.109.122.

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38

Grace, Nabil F., Elin A. Jensen, and Mena R. Bebawy. "Transverse post-tensioning arrangement for side-by-side box-beam bridges." PCI Journal 57, no. 2 (March 1, 2012): 48–63. http://dx.doi.org/10.15554/pcij.03012012.48.63.

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39

Tan, Kiang Hwee, and Robert A. Tjandra. "Strengthening of Precast Concrete Girder Bridges by Post-Tensioning for Continuity." PCI Journal 48, no. 3 (May 1, 2003): 56–71. http://dx.doi.org/10.15554/pcij.05012003.56.71.

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40

Atmaca, Barbaros. "Size and post-tensioning cable force optimization of cable-stayed footbridge." Structures 33 (October 2021): 2036–49. http://dx.doi.org/10.1016/j.istruc.2021.05.050.

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41

Jyothis, Alex, and Mathews Vinay. "Finite Element Analysis of Post Tensioned I-Beam with Web Openings." Applied Mechanics and Materials 857 (November 2016): 113–18. http://dx.doi.org/10.4028/www.scientific.net/amm.857.113.

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Construction of pre-stressed concrete (PSC) structures is becoming a common practice in various parts of the world, because of its better stability, serviceability, economy, aesthetic appearance and structural efficiency. Post tensioning is a method of reinforcing concrete or other materials with high strength steel strands or bars, typically referred to as tendons. The provision of large openings in pre-stressed concrete beams is necessary to accommodate utility services in residential, commercial, and industrial buildings. A post tensioned I-beam is analyzed by using ANSYS software and the deformation and stress pattern of beam is studied for different parametric conditions by changing the position of opening and different shapes of openings.

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Zhou, Wei, Jian Xin Zhang, and Wen Zhong Zheng. "Research on New Type of Prestressed Concrete Double Tee Floor Slabs." Advanced Materials Research 250-253 (May 2011): 2376–81. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2376.

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Prestressed concrete double Tee floor slabs are widely used for the roof of building construction. Some problems are met during the development practice of this type of precast structures. Firstly, the overhang flange of the traditional double Tee floor slab is not enough large in the view of economic and utilization. Secondly, it is not easy to dispose the skylights on the roof used double Tee floor slabs in the workshops or the gymnasiums. Thirdly, most of the beams are produced in prestressing plants, but very few productions are made in site. Therefore, a new type of prestressed concrete double Tee floor slabs have been designed with some characters such as 3.0-m outside flange, flange slabs with rectangular opening holes for the skylights or not, and the beams produced in the prestressing plants with pre-tensioning prestressing tendons or post-tensioning with the strands in site.

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Nimgade, Miss Kajal Sainath, Prof Dr Nina R. Dhamge, and PE Diwakar Kumar. "Feasibility Analysis of Post-Tensioned Beam for Industrial Building: A Review." International Journal for Research in Applied Science and Engineering Technology 10, no. 4 (April 30, 2022): 1957–64. http://dx.doi.org/10.22214/ijraset.2022.41680.

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Abstract: In recent years, due to corrosion and the constant demand for increased traffic flow, there is an eagerly need for an efficient system that can be used to repair or strengthen bridges and structures with steel-concrete composite sections. There have been so many strengthening techniques used to prevent such serious structural problems. One of these most useful techniques, which has successfully proven effective in repairing and strengthening structural members, is to use the externally post-tensioned tendons technique. The various study has also provided a recently completed experimental program on scaled bridge composite steel and concrete beams strengthened with external post-tensioning tendons to explore the fundamental cyclic loading behavior. This article summarizes the design of Post-Tensioned Beam for industrial building and a comparative study between PT Beam and RCC Beam based on a literature survey. We are analyzing such structure in our research having a large span. Manual design of PT Beam for three different span lengths without any intermediate supports and manual design of RCC Beam. We are doing a comparative study of PT Beam and RCC Beam based on the results. This report is based on a study of PT Beam that will aid future research and advances in the construction industry. Keywords: Post-Tensioning Beam, RCC Beam, Industrial Building

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Abdullah, A. B. M., Jennifer A. Rice, Rahul Bhatia, Natassia R. Brenkus, and H. R. Hamilton. "A thermal analysis of flexible filler injection for unbonded post-tensioning tendons." Construction and Building Materials 126 (November 2016): 599–608. http://dx.doi.org/10.1016/j.conbuildmat.2016.09.083.

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Kamalakannan, Suruthi, Ramya Thirunavukkarasu, Radhakrishna G. Pillai, and Manu Santhanam. "Factors affecting the performance characteristics of cementitious grouts for post-tensioning applications." Construction and Building Materials 180 (August 2018): 681–91. http://dx.doi.org/10.1016/j.conbuildmat.2018.05.236.

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Mohammed, Khaleel, M. Jameel, Zainah Ibrahim, and Chee Tan. "Performance of a Ductile Hybrid Post-Tensioned Beam-to-Column Connection for Precast Concrete Frames under Seismic Loads: A Review." Applied Sciences 11, no. 16 (August 16, 2021): 7497. http://dx.doi.org/10.3390/app11167497.

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The performance of precast concrete frame structures against seismic loads mainly depends on the beam-to-column connection. A ductile hybrid connection consists of unbonded post-tensioning steel and bonded reinforcement bars, both of which provide overall moment resistance to the frame. Post-tensioning steel acts as a restoring force which brings the structure back to its initial position upon unloading. Mild steel acts as an energy dissipator which yields in tension and compression. To evaluate the performance of precast frame structures, the structural engineer requires extensive knowledge of the complex nonlinear behavior of the connection. Standardization to mass produce is one of the benefits of precast construction, but with standardization in design there is severe risk. All previous earthquakes have clearly shown that continuous repetition of accepted practice without proper engineering review can lead to disaster. It is important to understand how different parameters of the connection influence the behavior and performance of the frame against seismic loads. The present study helps structural engineers and researchers with a detailed review of hybrid post-tensioned connections. This review is focused mainly on precast beam-to-column connections, studies on the development of hybrid connections, performance evaluations of hybrid connections, and the performance evaluation of precast frames with hybrid connections.

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Bruce, Trevor L., and Matthew R. Eatherton. "Behavior of Post-Tensioning Strand Systems Subjected to Inelastic Cyclic Loading." Journal of Structural Engineering 142, no. 10 (October 2016): 04016067. http://dx.doi.org/10.1061/(asce)st.1943-541x.0001503.

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Terzioglu, Tevfik, Madhu M. Karthik, Stefan Hurlebaus, and Mary Beth D. Hueste. "Nondestructive Evaluation of External Post-Tensioning Systems to Detect Grout Defects." Journal of Structural Engineering 145, no. 1 (January 2019): 05018002. http://dx.doi.org/10.1061/(asce)st.1943-541x.0002229.

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Xu, Haixue, and Brahim Benmokrane. "Strengthening of existing concrete dams using post-tensioned anchors: a state-of-the-art review." Canadian Journal of Civil Engineering 23, no. 6 (December 1, 1996): 1151–71. http://dx.doi.org/10.1139/l96-925.

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Many old dams are in need of strengthening and rehabilitation as a result of aging, deterioration, deficiencies in design and construction, and more stringent safety standards. These standards include the probable maximum flood and the maximum credible earthquake. Post-tensioned anchors are the most practical and cost-effective method of strengthening existing concrete dams subjected to direct tension, sliding, overturning and seismic loading. In some cases, they are used to stabilize rock abutments and concrete locks and to combat the effects of alkaline and aggregate reaction. The post-tensioning technique requires minimum demolition, has only a minor impact on the dam, and is relatively inexpensive using a small number of anchors. This paper reviews about 60 case histories of concrete dams strengthened by post-tensioned anchors. The reasons for strengthening existing dams are analyzed. The general design, construction, drilling, grouting, testing, and performance of post-tensioned anchors for strengthening concrete dams are outlined. Key words: post-tensioned, anchor, multistrand, fixed anchor length, free anchor length, anchor head, strengthening, rehabilitation, concrete dam.

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Zhu, Peng Cheng, Ming Kang Gou, and Yin Zhi Zhou. "Experimental Investigation on Steel H-Beam Prestressed with Externally High Strength Steel Bars." Applied Mechanics and Materials 578-579 (July 2014): 155–59. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.155.

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The external post-tensioning technique has been commonly used in the construction field because it facilitates the analysis of structures and is widely applicable for many types of structures. In this research, 12 steel H-beams were built and tested in terms of the amount of tendon or prestressing force. The results show that the externally prestressing method can increase ultimate bearing capacity of the beams. The prestressing force is the significant factor that influence the strengthening of steel H-beams. However, the amount of deviators cannot significantly influence the bearing capacity.

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