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Zeitschriftenartikel zum Thema "Reinforced concrete construction Testing":
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Rybak, Roman. „EXPERIMENTAL TESTING METHODOLOGY OF STRESS-STRAIN STATE OF THE REINFORCED CONCRETE PIPE WITH STRENGTHENING“. Theory and Building Practice 2022, Nr. 2 (20.12.2022): 36–43. http://dx.doi.org/10.23939/jtbp2022.02.036.
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Reinforced concrete pipes are exposed to environmental influences during the entire period of their operation. As a result, defects and damage appear and reduce durability and bearing capacity. In this regard, there is a need to repair and strengthen them. In order to assess the effectiveness of strengthening reinforced concrete pipes, it is necessary to get data about deformations that appeared as a result of the loads on the reinforced concrete pipe. The method for conducting experimental studies of the deformed state of reinforced concrete pipes has been developed, and the main devices and means necessary for conducting experimental research in laboratory conditions have been selected. The obtained data of deformations appearance can be used to compare the effectiveness of various methods of strengthening reinforced concrete pipes and their improvement as well as to monitor technical condition and to predict the formation of defects.
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Burkovič, Kamil, Martina Smirakova und Pavlina Matečková. „Testing and Modelling of Concrete Pile Foundations“. Key Engineering Materials 738 (Juni 2017): 287–97. http://dx.doi.org/10.4028/www.scientific.net/kem.738.287.
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Foundation of building on concrete piles is often used when it is necessary to carry the load into larger depth as by common foundation. Bearing capacity of piles or piled raft foundation is wide area to research. This paper deals with experimental load test of concrete pile and with their numerical modelling. Several types of foundation construction were tested and two kinds will be presented and compared in this paper - reinforced concrete foundation slab and raft foundation (made of reinforced concrete foundation slab supported by drilled reinforced concrete pilot). These types of foundation constructions were constructed as models, in a reduced scale, approx. 1:10. The size had to be adjusted due to limited capacity of the testing equipment and financial reasons. Except measuring of the foundation behaviour, there was also carried out measurement of the adjacent terrain.The aim of this paper is to compare the behaviour of rigid slab and the piled raft. The measurement results will be then compared with the results of numerical modelling.
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Davidyuk, Artem, und Igor Rumyantsev. „Quality control of high-performance concrete in high-rise construction during operation“. MATEC Web of Conferences 170 (2018): 01035. http://dx.doi.org/10.1051/matecconf/201817001035.
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With onset of the XXI century, the demand for construction of high-rise buildings with the load-bearing framework made of high-performance cast-in-situ concrete has increased many-fold in the construction sector. Specific features of the high-performance concrete of bearing structures in the situation of real operation of high-rise buildings are continuously studied by scientists and specialists all over the world, and regulatory and methodological documents are being complemented and adjusted. High-performance concretes and structures made of them possess some specific features that should be taken into account in quality control. The methods of concrete inspection and concrete strength evaluation described in GOST 18105 “Concretes. Guidelines on Testing and Evaluation of Strength” and GOST 22690 “Concretes. Evaluation of Strength by Mechanic Non-Destructive Test Methods” were written when precast reinforced concrete was predominantly used in the construction sector and were limited to the functions of intra-factory quality control of reinforced concrete products. At present, instruments for non-destructive testing using indirect methods are usually calibrated with the help of local destructions, as a rule, a pull out or rib shear test. The said methods are in fact indirect since they indicate the force of destruction of the surface layer of a structure.
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Orlowsky, Jeanette, Markus Beßling und Vitalii Kryzhanovskyi. „Prospects for the Use of Textile-Reinforced Concrete in Buildings and Structures Maintenance“. Buildings 13, Nr. 1 (10.01.2023): 189. http://dx.doi.org/10.3390/buildings13010189.
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This paper discusses the state of the art in research on the use of textile-reinforced concretes in structural maintenance. Textile-reinforced concretes can be used in structural maintenance for various purposes, including the sealing and protection of the existing building structures, as well as for the strengthening of structures. The first-mentioned aspects are explained in this paper on the basis of example applications. A special focus is placed on the maintenance of heritage-protected structures. The development, characterization, and testing of a textile-reinforced concrete system for a heritage-protected structure are presented. Examples of the application of textile-reinforced concrete for strengthening highway pavements and masonry are also given. In particular, the possibility of adapting the textile-reinforced concrete repair material to the needs of the individual building is one advantage of this composite material.
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Zhang, Jianren, Hui Peng und C. S. Cai. „Destructive Testing of a Decommissioned Reinforced Concrete Bridge“. Journal of Bridge Engineering 18, Nr. 6 (Juni 2013): 564–69. http://dx.doi.org/10.1061/(asce)be.1943-5592.0000408.
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Choi, Pangil, Lochana Poudyal, Fouzieh Rouzmehr und Moon Won. „Spalling in Continuously Reinforced Concrete Pavement in Texas“. Transportation Research Record: Journal of the Transportation Research Board 2674, Nr. 11 (10.09.2020): 731–40. http://dx.doi.org/10.1177/0361198120948509.
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The performance of continuously reinforced concrete pavement (CRCP) in Texas has been quite satisfactory, primarily thanks to the continuous improvements in design and construction. However, severe spalling has been a major problem, and the Texas Department of Transportation (TxDOT) has sponsored several research projects since 1985 to identify solutions for this serious problem. Even though the research efforts were successful in identifying spalling mechanisms, developing a policy that TxDOT could easily implement has been a challenge. To develop a more practical solution to this problem, TxDOT initiated a research study, and the research efforts consisting of identifying CRCP projects with severe and no spalling, obtaining and conducting materials testing on concrete cores from those projects, analyzing the testing data, and performing theoretical analyses to validate the testing results. Among the material properties evaluated, the coefficient of thermal expansion (CTE) of concrete proved to have the best correlation with spalling. Detailed analyses of mechanistic behavior of concrete conducted with an object-oriented finite element program (OOF2) and commercial finite element program verified the reasonableness of the field-testing results. All concrete cores from CRCP with severe spalling had a CTE larger than 5.5 microstrains/°F, whereas no spalling was observed in concrete with a CTE less than that value. Based on this finding, TxDOT now requires the use of coarse aggregate that will produce concrete with a CTE of less than 5.5 microstrains/°F for CRCP construction. It is expected that this implementation will reduce the spalling in CRCP substantially.
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Belentsov, Yuri A., und Liliya F. Kazanskaya. „Non-destructive methods of concrete quality control as factor in reliability of concrete and reinforced concrete structures in transport facilities“. Transportation Systems and Technology 4, Nr. 1 (15.03.2018): 058–67. http://dx.doi.org/10.17816/transsyst2018041058-067.
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Aim: The development of theory and practice of construction science leads to a need to enhance the basics of design, construction and operation of concrete and reinforced concrete structures. Despite significant progress, there is risk of collapse of different structures at various stages of their lifecycle. Current state of construction industry leads to a need to increase the quality and reliability of buildings and structures under construction.
Methods: The authors have used methods of probabilistic forecasting in this work
Results: The development of methods of construction materials control, particularly concrete and reinforced concrete, leads to a gradual implementation of non-destructive control methods. To assess the change of confidence and reliability coefficients of designed structures, the authors have substantiated the transition to probabilistic rationing of strength properties of concrete and reinforced concrete structures using classes. Also, the authors suggest implementation of non-destructive control methods. However, non-destructive control methods have a number of drawbacks, the key among these being the decrease of confidence coefficient while preparing a calibration curve, which drastically affects the results of quality control. It is possible to solve the problem by creating a set of control tests including both destructive and non-destructive quality control methods. This will provide systems for collecting testing information of high accuracy.
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Lindner, Marco, Konrad Vanselow, Sandra Gelbrich und Lothar Kroll. „Fibre-reinforced polymer stirrup for reinforcing concrete structures“. Technologies for Lightweight Structures (TLS) 3, Nr. 1 (24.01.2020): 17–24. http://dx.doi.org/10.21935/tls.v3i1.117.
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Fibre-plastic composites offer an interesting alternative to concrete reinforcement. In order to expandthe application spectrum of reinforcing elements in fibre composite construction, a new steel-free bracingsystem with reduced radii of curvature was developed. An improvement in load carrying capacity couldbe proven in extensive investigations based on international testing methods and verified by practicaltests. With the help of newly reinforced precast concrete elements from the area of waterways and trafficroutes, a high potential for lightweight construction and resource efficiency can be impressivelydemonstrated.
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Newtson, Craig M., Gaur P. Johnson und Brian T. Enomoto. „Fundamental Frequency Testing of Reinforced Concrete Beams“. Journal of Performance of Constructed Facilities 20, Nr. 2 (Mai 2006): 196–200. http://dx.doi.org/10.1061/(asce)0887-3828(2006)20:2(196).
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Benmokrane, Brahim, Ehab El-Salakawy, Amr El-Ragaby und Sherif El-Gamal. „Performance evaluation of innovative concrete bridge deck slabs reinforced with fibre-reinforced-polymer bars“. Canadian Journal of Civil Engineering 34, Nr. 3 (01.03.2007): 298–310. http://dx.doi.org/10.1139/l06-173.
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This paper presents the construction details, field testing, and analytical results of six innovative concrete bridges reinforced with fibre-reinforced-polymer (FRP) bars recently constructed in North America, namely Wotton, Magog, Cookshire-Eaton, Val-Alain, and Melbourne bridges in Quebec, Canada, and Morristown bridge in Vermont, USA. All six bridges are girder type, with main girders made of either steel or prestressed concrete. The main girders are supported over spans ranging from 26.2 to 50.0 m. The deck is a 200–230 mm thick concrete slab continuous over spans of 2.30–3.15 m. Different types of glass- and carbon-FRP reinforcing bars and conventional steel were used as reinforcement for the concrete deck slab. The six bridges are located on different highway categories, which means different traffic volume and environmental conditions. The bridges are well instrumented at critical locations for internal temperature and strain data collection using fibre optic sensors. These sensors are used to monitor the deck behaviour from the time of construction to several years after the completion of construction. The bridges were tested for service performance using calibrated truckloads. In parallel, a finite element analysis (FEA) was conducted and verified against the results of the field load tests. The FEA was then used to run parametric studies to investigate the effect of several important parameters such as FRP reinforcement type and ratio on the service and ultimate behaviour of these bridge decks. The analytical and field results under real service conditions, in terms of deflections, cracking, and strains in reinforcement and concrete, were comparable to those of concrete bridge deck slabs reinforced with steel.Key words: bridges deck slabs, fibre-reinforced-polymer (FRP) bars, field testing, finite element analysis.
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Microreproduction of original thesis. Thesis (PhD)--Stellenbosch University, 1990. Some digitised pages may appear illegible due to the condition of the original microfiche copy. ENGLISH ABSTRACT: see item for full text AFRIKAANSE OPSOMMING: sien item vir volteks.
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Wong, Koon-Wan. „Non-linear behaviour of reinforced concrete frames /“. Title page, contents and abstract only, 1989. http://web4.library.adelaide.edu.au/theses/09PH/09phw872.pdf.
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Machado, Rafael Ignacio. „Experimental investigation of steel tubed reinforced concrete columns“. Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19457.
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Cassidy, Eric Dana. „Development and Structural Testing of FRP Reinforced OSB Panels for Disaster Resistant Construction“. Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/CassidyED2002.pdf.
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Includes bibliographical references (p. 185-189) Aims to determine the effect of partial interaction on the behaviour of the concrete beam, plate and bolt connector components of the composite plated beam. Develops design rules for the determination of the ultimate capacity for bolted plate reinforced composite beams.
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Samman, Tamim Abdulhadi. „Indeterminate reinforced concrete frames subjected to inelastic cyclic deformation“. Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184307.
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Four full-size statically indeterminate reinforced concrete frames with two symmetrical bays were tested to obtain sufficient data to evaluate the adequacy of the current ACI-ASCE Committee 352 design recommendations, as well as to determine whether a relaxation of some of the limits in these guidelines can be justified. Each specimen contained three 8.5-foot-long columns, connected at mid-height by two 9-foot-long beams. Initially, a constant axial load was applied to each column. The specimens were then subjected to a displacement-controlled loading schedule to simulate the type of displacements a frame may experience during a severe earthquake. In designing the specimens, the latest recommendations of the ACI-ASCE Committee 352 and the ACI building code ACI 318-83 were satisfied except for the following modifications: (1) the flexural strength ratio (M(R)) in the second specimen was reduced from 1.4 to 1.2, (2) the shear-stress factors (γ) in the joints of the third specimen were increased from 12 and 15 to 15 and 20 for the exterior and interior joints respectively, and (3) the number of the transverse reinforcements inside the right exterior joint in the fourth specimen was reduced from 4 to 2 sets of hoops. The conclusion inferred from the results indicate that for drift levels within the elastic range, the elongations and the rotations of the beam regions near the faces of the columns, in addition to the joint shear strains, were not affected by the design values for the primary variables in the last three specimens. For larger excursions into the inelastic range, the relaxation of the current Committee 352 design recommendations in the last three specimens not only showed a significant effect in reducing the elongations and the rotations of the beams, or in increasing the joint shear strains but led to lower energy dissipation of the specimens. Consequently, the current design guidelines by the ACI-ASCE Committee 352 yield statically indeterminate frames which exhibit sufficient ductility.
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Sheats, Matthew Reed. „Rehabilitation of reinforced concrete pier caps using carbon fiber reinforced composites“. Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/19490.
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Includes corrigenda (inserted at front) and list of publications published as a result of this research. Includes bibliographical references (leaves 192-199) Investigates the overload behaviour and modes of collapse of reinforced concrete flexural members containing 500MPa grade reinforcing steel and evaluates the adequacy of current ductility requirements for design according to AS 3600 to ensure strength and safety.
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Lam, Wai-yin, und 林慧賢. „Plate-reinforced composite coupling beams: experimental and numerical studies“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37311797.
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Reinforced Concrete Research Council (U.S.), Hrsg. Probabilistic basis for design criteria in reinforced concrete: A collection of papers. New York, N.Y: American Society of Civil Engineers, 1985.
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Reinforced Concrete Research Council (U.S.), Hrsg. Long reinforced concrete columns: A collection of papers selected by the Reinforced Concrete Research Council. New York, N.Y: American Society of Civil Engineers, 1986.
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Delaney, Jason C. The assessment of aspects related to defect criticality in CFRP strengthened concrete flexural members. La Jolla, Calif: Dept. of Structural Engineering, University of California, San Diego, 2006.
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Poukhonto, L. M. Durability of concrete structures and constructions: Silos, bunkers, reservoirs, water towers, retaining walls ; translated from Russian. Lisse: Balkema, 2003.
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Empelmann, Martin. Zum nichtlinearen Trag- und Verformungsverhalten von Stabtragwerken aus Konstruktionsbeton unter besonderer Berücksichtigung von Betriebsbeanspruchungen. Aachen: Lehrstuhl und Institut für Massivbau der RWTH Aachen, 1995.
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Rodriguez, M. Seismic load tests on reinforced concrete columns strengthened by jacketing. Christchurch, N.Z: University of Canterbury, Dept. of Civil Engineering, 1991.
Buchteile zum Thema "Reinforced concrete construction Testing":
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De Rivaz, Benoit. „Specifying and testing fibre reinforced sprayed concrete: Advantages and challenges of some testing methods“. In Geotechnical Aspects of Underground Construction in Soft Ground. 2nd Edition, 385–94. 2. Aufl. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003355595-50.
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Pierson, Matthew C., und Luke R. Pinkerton. „Direct Tension Testing of Plain and Fiber Reinforced Concrete for Use in Additive Construction“. In Standards Development for Cement and Concrete for Use in Additive Construction, 35–54. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2021. http://dx.doi.org/10.1520/stp163620200086.
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du Plessis, L., G. J. Jordaan, P. J. Strauss und A. Kilian. „The Design, Construction and First-Phase Heavy Vehicle Simulator Testing Results on Full Scale Ultra-Thin Reinforced Concrete Test Sections at Rayton, South Africa“. In The Roles of Accelerated Pavement Testing in Pavement Sustainability, 751–68. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42797-3_49.
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Mosley, W. H., J. H. Bungey und R. Hulse. „Composite construction“. In Reinforced Concrete Design, 350–73. London: Macmillan Education UK, 1999. http://dx.doi.org/10.1007/978-1-349-14911-7_13.
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Mitchell, Charles F., und George A. Mitchell. „Reinforced Concrete or Ferro-Concrete.“ In Building Construction and Drawing 1906, 502–15. 4. Aufl. London: Routledge, 2022. http://dx.doi.org/10.1201/9781003261674-11.
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Dickey, Walter L. „Reinforced Concrete Masonry Construction“. In Handbook of Concrete Engineering, 632–62. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4757-0857-8_17.
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Garrido Vazquez, E., A. Naked Haddad, E. Linhares Qualharini, L. Amaral Alves und I. Amorim Féo. „Pathologies in Reinforced Concrete Structures“. In Sustainable Construction, 213–28. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0651-7_10.
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Bussell, Michael. „Conservation of Concrete and Reinforced Concrete“. In Structures & Construction in Historic Building Conservation, 192–210. Oxford, UK: Blackwell Publishing Ltd, 2008. http://dx.doi.org/10.1002/9780470691816.ch11.
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Heidemann, Lucas, Jochen Scheck und Berndt Zeitler. „Impact Sound Insulation of Thermally Insulated Balconies“. In iCity. Transformative Research for the Livable, Intelligent, and Sustainable City, 359–71. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92096-8_23.
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AbstractWith the increasing urban densification, balconies are gaining in popularity as they improve the living quality in homes. From a technical point of view, the thermal insulation between balconies and the building’s façade is state of the art. In Germany, the most popular balcony construction is a reinforced concrete balcony, separated from the building by a thermal insulation element (TIE), which is meant to reduce the thermal energy loss and thus ensure the sustainability of intelligent buildings. The impact sound transmission from balconies, however, is a problem that has not been addressed enough to date. The paper is based on a project of the same name within the iCity research with the main goal of providing acoustic quantities, e.g. an impact sound pressure level difference, for a TIE that can be used to compare the acoustical quality of products and used to predict the impact sound pressure levels within the building using the standard EN ISO 12354-2. Experimental and numerical studies have been carried out on various ceiling-balcony mock-ups without and with TIEs, e.g. by means of experimental modal analysis and validated finite element models, respectively. These studies showed that even doubling the width of the ceiling-balcony mock-up does not change the results significantly, suggesting that the proposed test set-up is suitable for standard testing. The analysis method and results presented here are for only one test set-up with and without a TIE that underwent constructive modifications during the tests. The selected TIE shows an effective sound insulation above 400 Hz and achieves a single-number rated impact sound level difference of $$ \Delta {L}_{\mathrm{w}}^{\ast}\approx 10\ \mathrm{dB} $$ Δ L w ∗ ≈ 10 dB .
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Soutsos, Marios, und Peter Domone. „Non-destructive testing of hardened concrete“. In Construction Materials, 259–66. Fifth edition. | Boca Raton : CRC Press, [2017]: CRC Press, 2017. http://dx.doi.org/10.1201/9781315164595-26.
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Konferenzberichte zum Thema "Reinforced concrete construction Testing":
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Macdonald, Clifford N., und Faci Faci. „Structural Engineering And Testing Fiber Reinforced Concrete Material Properties“. In The Seventh International Structural Engineering and Construction Conference. Singapore: Research Publishing Services, 2013. http://dx.doi.org/10.3850/978-981-07-5354-2_m-49-412.
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„A New Construction Material—Non-Corrosive Basalt Bar Reinforced Concrete“. In SP-229: Quality of Concrete Structures and Recent Advances in Concrete Materials and Testing. American Concrete Institute, 2005. http://dx.doi.org/10.14359/14741.
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BENMOKRANE, B., E. F. EL-SALAKAWY, G. DESGAGNÉ und T. LACKEY. „CONSTRUCTION, TESTING AND MONITORING OF FRP REINFORCED CONCRETE BRIDGES IN NORTH AMERICA“. In Proceedings of the Sixth International Symposium on FRP Reinforcement for Concrete Structures (FRPRCS–6). World Scientific Publishing Company, 2003. http://dx.doi.org/10.1142/9789812704863_0126.
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„Rational Fuzzy Logic Condition Rating Model of Reinforced Concrete Bridge Decks Using Non-destructive Testing and Visual Inspection“. In "SP-333: Advances in Concrete Bridges: Design, Construction, Evaluation, and Rehabilitation ". American Concrete Institute, 2019. http://dx.doi.org/10.14359/51720275.
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Zhao, X. F., G. Song, M. Fernandez, Y. L. Mo und J. P. Ou. „FBG Sensor-Based Monitoring of a Reinforced Concrete Frame under Pushover Testing“. In 12th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments; and Fourth NASA/ARO/ASCE Workshop on Granular Materials in Lunar and Martian Exploration. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41096(366)220.
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Moharekpour, Milad, Stefan Hoeller und Markus Oeser. „A comparative study of crack behavior of continuously reinforced concrete pavements (CRCP) on three sections in Germany“. In 12th International Conference on Concrete Pavements. International Society for Concrete Pavements, 2021. http://dx.doi.org/10.33593/4pr5xno7.
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The traffic volume and the amount of heavy traffic on German motorways increased steadily. To guarantee mobility and reduce the national economic costs, road construction with maximum service life, minimum maintenance and minimum traffic restrictions for maintenance are needed. Continuously reinforced concrete pavement (CRCP) are extremely durable in terms of use and maintenance. CRCP offer lower thickness, no transversal joints and the possibility to improve skid resistance and reduction of noise emissions through a thin asphalt surface. The performance of CRCP is influenced by a number of specific characteristics such as the thickness and the quality of the concrete, the longitudinal and transversal reinforcement, the base layer and the environmental conditions. These aspects influence the crack pattern, crack distance and crack widths. In Germany CRCP is in the stage of field testing. From 1997 to today, a total of 8 sections with many variations have been constructed. A detailed comparative study of these sections has been lacking. As part of a research project, the RWTH University and the German Federal Highway Research Institute (BASt) are investigating these sections in CRCP with and without an asphalt surface in Germany and compare it to the Belgium standard constructions. Three CRCP sections were selected and evaluated throughout Germany. The aim is to evaluate the different designs in the sections in terms of their behavior, to quantify achievable service life, necessary maintenance and availability. From this, a preferred variant of the construction is designed and implemented on a motorway in Germany as part of a trial site.
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Thapa, Aashish, Mustafa Mashal und Mahesh Acharya. „Large-Scale Flexural Testing of Concrete Beams Reinforced with Conventional Steel and Titanium Alloy Bars“. In IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/prague.2022.0272.
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<p>The research focuses on the use of Titanium Alloy Bars (TiABs) in concrete cap beams. TiABs offer good ductility, high strength, lightweight, superior corrosion resistance, lower overstrength, and better fatigue performance. TiABs have recently been used in several existing bridges in Oregon and Texas in the United States to increase shear and flexural capacities of concrete beams. While TiABs have been implemented in retrofitting of existing bridges in the United States, their application in new structures have not been tested and compared against conventional steel rebars. Idaho State University (ISU) has been investigating application of TiABs in new concrete structures through large-scale testing. Past research at ISU has shown that the use of titanium alloy (Ti-6Al-4V) in new bridges can reduce rebar congestion and residual drift after an earthquake by 50% while providing adequate ductility and strength compared to cast-in-place construction. The research in this paper proposes concept for an innovative cap beam reinforced with longitudinal TiABs. The cap beam integrates both structural performance and durability. Flexural and shear design procedures for the cap beam in accordance with the AASHTO LRFD Design are discussed. To investigate structural performance, a large-scale cap beam reinforced with longitudinal grade 5 titanium alloy (Ti-6Al-4V) is tested under three-point bending test protocol. The results are compared against a benchmark cast-in-place beam with normal rebars under the same testing arrangement and loading protocol.</p>
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Zhang, Fei, und Jianxun Ma. „Experimental Study on Hybrid Masonry Structure with RC Frame under Lateral Reversed Cyclic Loading“. In IABSE Conference, Kuala Lumpur 2018: Engineering the Developing World. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0142.
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<p>As a new type of structural system, hybrid masonry (HM) structure with reinforced concrete (RC) frame is constructed of reinforced block masonry wall and reinforced concrete frame. This structural system combines the advantages of reinforced concrete frame structure and reinforced concrete block masonry structure, also overcomes some limitations of them. In order to study the seismic performance of the structural system, the lateral reversed cyclic loading experiment on the HM structure with RC frame was conducted. In the experiment, two specimens that were constructed with different connecting type were designed and tested, in one of them the masonry blocks was separated from the RC frame and only connected with steel keys at the top part of the specimen, while in the other there was no spacing between the RC frame and the masonry blocks. According to the data of the experiment, the paper analyzed the failure process and patterns, hysteretic characteristic, skeleton curve, stiffness degradation and displacement ductility of the structural system, and compared the results of the two specimens. The experimental study indicated that the HM structure with RC frame showed extraordinary good seismic performance during testing, and this form of construction had fairly good displacement ductility and energy dissipation, which would provide a basis for further theoretical analysis and design method.</p>
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Pickel, Daniel, Dahlia Malek und Susan Tighe. „Performance Summary Of Precast Concrete Inlay Panel Trial In Ontario“. In 12th International Conference on Concrete Pavements. International Society for Concrete Pavements, 2021. http://dx.doi.org/10.33593/usv26zve.
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In order to address deep-seated rutting issues on high-volume asphalt highways in Ontario, Canada, the Ministry of Transportation of Ontario (MTO) was interested in the design and testing of a Precast Concrete Inlay Panel (PCIP) trial section. The PCIP was used to increase the stiffness of the pavement section within the short overnight construction windows that the MTO specifies to minimize the effects on road users. The trial section was designed to include three separate methods of panel support, which is understood to be a primary consideration in the performance of precast concrete panels. The trial section was constructed in September 2016 on the traffic lane of Highway 400 and has been in continuous service since that time. Instrumentation was installed during construction to measure the pressure, moisture, and temperature conditions at the interface between the panels and the existing asphalt layer. This paper summarizes the performance of this trial during the more than three years of service, including findings from the sub-panel instrumentation, falling weight deflectometer testing, and condition assessments. Additionally, the findings of an analysis of the construction aspects of the different support conditions are included to reinforce recommendations regarding the best support technique for future applications of the PCIP rehabilitation technique.
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Huo, Jin, Zirong Hu und Yuping Sun. „Modeling and Analysis of Concrete-Filled Steel Structure Under Aircraft Impact“. In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48874.
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Concrete-filled steel structures (SC), or called steel concrete composite structures are composed of steel plates and reinforced concrete. This kind of structures has demonstrated more effective against blast and impact loads, and has been used in risk-sensitive structures such as the nuclear electric power plant and other critical constructions. The comprehensive modeling and analysis is performed in this paper for the full scale SC panel against aircraft impact after the testing results of 1/7.5 scaled model was reviewed and correlated. The methodology, modeling approach, and mesh density sensitivity investigation is presented.
Berichte der Organisationen zum Thema "Reinforced concrete construction Testing":
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Roesler, Jeffery, Sachindra Dahal, Dan Zollinger und W. Jason Weiss. Summary Findings of Re-engineered Continuously Reinforced Concrete Pavement: Volume 1. Illinois Center for Transportation, Mai 2021. http://dx.doi.org/10.36501/0197-9191/21-011.
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This research project conducted laboratory testing on the design and impact of internal curing on concrete paving mixtures with supplementary cementitious materials and evaluated field test sections for the performance of crack properties and CRCP structure under environmental and FWD loading. Three experimental CRCP sections on Illinois Route 390 near Itasca, IL and two continuously reinforced concrete beams at UIUC ATREL test facilities were constructed and monitored. Erodibility testing was performed on foundation materials to determine the likelihood of certain combinations of materials as suitable base/subbase layers. A new post-tensioning system for CRCP was also evaluated for increased performance and cost-effectiveness. This report volume summarizes the three year research effort evaluating design, material, and construction features that have the potential for reducing the initial cost of CRCP without compromising its long-term performance.
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Clayton, Dwight A., Kyle Hoegh und Lev Khazanovich. Thick Concrete Specimen Construction, Testing, and Preliminary Analysis. Office of Scientific and Technical Information (OSTI), März 2015. http://dx.doi.org/10.2172/1185937.
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Taylor, Benjamin, Yu Qiao, Mark Bowman und Samuel Labi. The Economic Impact of Implementing Nondestructive Testing of Reinforced Concrete Bridge Decks in Indiana. Purdue University, Juni 2017. http://dx.doi.org/10.5703/1288284316343.
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Ramey, M. R., und G. Daie-e. Preliminary investigation on the suitablity of using fiber reinforced concrete in the construction of a hazardous waste disposal vessel. Office of Scientific and Technical Information (OSTI), Juli 1988. http://dx.doi.org/10.2172/6382922.
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Spletzer, B. L., L. D. Lambert und V. L. Bergman. Separate effects testing and analyses to investigate liner tearing of the 1:6-scale reinforced concrete containment building. Office of Scientific and Technical Information (OSTI), Juni 1995. http://dx.doi.org/10.2172/95192.
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Weiss, Charles, William McGinley, Bradford Songer, Madeline Kuchinski und Frank Kuchinski. Performance of active porcelain enamel coated fibers for fiber-reinforced concrete : the performance of active porcelain enamel coatings for fiber-reinforced concrete and fiber tests at the University of Louisville. Engineer Research and Development Center (U.S.), Mai 2021. http://dx.doi.org/10.21079/11681/40683.
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A patented active porcelain enamel coating improves both the bond between the concrete and steel reinforcement as well as its corrosion resistance. A Small Business Innovation Research (SBIR) program to develop a commercial method for production of porcelain-coated fibers was developed in 2015. Market potential of this technology with its steel/concrete bond improvements and corrosion protection suggests that it can compete with other fiber reinforcing systems, with improvements in performance, durability, and cost, especially as compared to smooth fibers incorporated into concrete slabs and beams. Preliminary testing in a Phase 1 SBIR investigation indicated that active ceramic coatings on small diameter wire significantly improved the bond between the wires and the concrete to the point that the wires achieved yield before pullout without affecting the strength of the wire. As part of an SBIR Phase 2 effort, the University of Louisville under contract for Ceramics, Composites and Coatings Inc., proposed an investigation to evaluate active enamel-coated steel fibers in typical concrete applications and in masonry grouts in both tension and compression. Evaluation of the effect of the incorporation of coated fibers into Ultra-High Performance Concrete (UHPC) was examined using flexural and compressive strength testing as well as through nanoindentation.
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Al-Chaar, Ghassan K., Peter B. Stynoski, Todd S. Rushing, Lynette A. Barna, Jedadiah F. Burroughs, John L. Vavrin und Michael P. Case. Automated Construction of Expeditionary Structures (ACES) : Materials and Testing. Engineer Research and Development Center (U.S.), Februar 2021. http://dx.doi.org/10.21079/11681/39721.
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Complex military operations often result in U.S. forces remaining at deployed locations for long periods. In such cases, more sustaina-ble facilities are required to better accommodate and protect forward-deployed forces. Current efforts to develop safer, more sustaina-ble operating facilities for contingency bases involve construction activities that require a redesign of the types and characteristics of the structures constructed, that reduce the resources required to build, and that decrease the resources needed to operate and maintain the completed facilities. The Automated Construction of Expeditionary Structures (ACES) project was undertaken to develop the capa-bility to “print” custom-designed expeditionary structures on demand, in the field, using locally available materials with the minimum number of personnel. This work investigated large-scale automated “additive construction” (i.e., 3D printing with concrete) for con-struction applications. This report, which documents ACES materials and testing, is one of four technical reports, each of which details a major area of the ACES research project, its research processes, and its associated results. There major areas include System Require-ments, Construction, and Performance; Energy and Modeling; Materials and Testing; Architectural and Structural Analysis.
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Nema, Arpit, und Jose Restrep. Low Seismic Damage Columns for Accelerated Bridge Construction. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, Dezember 2020. http://dx.doi.org/10.55461/zisp3722.
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This report describes the design, construction, and shaking table response and computation simulation of a Low Seismic-Damage Bridge Bent built using Accelerated Bridge Construction methods. The proposed bent combines precast post-tensioned columns with precast foundation and bent cap to simplify off- and on-site construction burdens and minimize earthquake-induced damage and associated repair costs. Each column consists of reinforced concrete cast inside a cylindrical steel shell, which acts as the formwork, and the confining and shear reinforcement. The column steel shell is engineered to facilitate the formation of a rocking interface for concentrating the deformation demands in the columns, thereby reducing earthquake-induced damage. The precast foundation and bent cap have corrugated-metal-duct lined sockets, where the columns will be placed and grouted on-site to form the column–beam joints. Large inelastic deformation demands in the structure are concentrated at the column–beam interfaces, which are designed to accommodate these demands with minimal structural damage. Longitudinal post-tensioned high-strength steel threaded bars, designed to respond elastically, ensure re-centering behavior. Internal mild steel reinforcing bars, debonded from the concrete at the interfaces, provide energy dissipation and impact mitigation.
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Bell, Matthew, Rob Ament, Damon Fick und Marcel Huijser. Improving Connectivity: Innovative Fiber-Reinforced Polymer Structures for Wildlife, Bicyclists, and/or Pedestrians. Nevada Department of Transportation, September 2022. http://dx.doi.org/10.15788/ndot2022.09.
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Engineers and ecologists continue to explore new methods and adapt existing techniques to improve highway mitigation measures that increase motorist safety and conserve wildlife species. Crossing structures, overpasses and underpasses, combined with fences, are some of the most highly effective mitigation measures employed around the world to reduce wildlife-vehicle collisions (WVCs) with large animals, increase motorist safety, and maintain habitat connectivity across transportation networks for many other types and sizes of wildlife. Published research on structural designs and materials for wildlife crossings is limited and suggests relatively little innovation has occurred. Wildlife crossing structures for large mammals are crucial for many highway mitigation strategies, so there is a need for new, resourceful, and innovative techniques to construct these structures. This report explored the promising application of fiber-reinforced polymers (FRPs) to a wildlife crossing using an overpass. The use of FRP composites has increased due to their high strength and light weight characteristics, long service life, and low maintenance costs. They are highly customizable in shape and geometry and the materials used (e.g., resins and fibers) in their manufacture. This project explored what is known about FRP bridge structures and what commercial materials are available in North America that can be adapted for use in a wildlife crossing using an overpass structure. A 12-mile section of US Highway 97 (US-97) in Siskiyou County, California was selected as the design location. Working with the California Department of Transportation (Caltrans) and California Department of Fish and Wildlife (CDFW), a site was selected for the FRP overpass design where it would help reduce WVCs and provide habitat connectivity. The benefits of a variety of FRP materials have been incorporated into the US-97 crossing design, including in the superstructure, concrete reinforcement, fencing, and light/sound barriers on the overpass. Working with Caltrans helped identify the challenges and limitations of using FRP materials for bridge construction in California. The design was used to evaluate the life cycle costs (LCCs) of using FRP materials for wildlife infrastructure compared to traditional materials (e.g., concrete, steel, and wood). The preliminary design of an FRP wildlife overpass at the US-97 site provides an example of a feasible, efficient, and constructible alternative to the use of conventional steel and concrete materials. The LCC analysis indicated the preliminary design using FRP materials could be more cost effective over a 100-year service life than ones using traditional materials.
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DeSantis, John, und Jeffery Roesler. Performance Evaluation of Stabilized Support Layers for Concrete Pavements. Illinois Center for Transportation, Februar 2022. http://dx.doi.org/10.36501/0197-9191/22-003.
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A research investigation was conducted on the erosion potential of stabilized subbases under concrete pavements and asphalt layers supporting concrete overlays. Through field surveys and testing in Illinois, this project evaluated if existing concrete pavements with stabilized subbases and concrete overlays were exhibiting potential erosion of the underlying support layer. The field evaluation testing included falling weight deflectometer testing, distress surveys, coring, and ultrasonic tomography scanning. A laboratory performance test was also established using the Hamburg wheel-tracking device to assess the erodibility of the various stabilized subbase layers for new construction and existing asphalt layers available for a concrete overlay. The analyzed field test results were coupled together with the laboratory performance testing to provide recommendations for updating the Illinois Department of Transportation’s “Bureau of Design and Environment Manual” guidance. No changes were recommended for hot-mix asphalt stabilized subbases, but testing using the Hamburg wheel-tracking device should be considered for Portland cement concrete stabilized support layers (e.g., CAM II) under concrete pavements. For testing of asphalt support layers for concrete pavement overlays, the Hamburg wheel-tracking device is recommended with performance criteria similar to flexible pavements for appropriate functional classes.
