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Relevant bibliographies by topics / Post-tensioned prestressed concrete construction

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Academic literature on the topic 'Post-tensioned prestressed concrete construction'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 March 2023

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Journal articles on the topic "Post-tensioned prestressed concrete construction"

1

Liu, Shu Yue, and Wei Ling Wang. "Research on Post-Tensioned Prestressed Concrete Construction Technology in Construction Engineering." Advanced Materials Research 700 (May 2013): 221–24. http://dx.doi.org/10.4028/www.scientific.net/amr.700.221.

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Study of bonded post-tensioned prestressed concrete construction technology, from materials, equipment, channel reservation, prestressed reinforcement material installation, concrete pouring, the prestressed tendons tension and grouting of anchor seal is described from the aspects of the construction of the link, the specific operation steps, summarizes the method of construction, improve the following prestressed concrete construction understanding.

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Le, Thanh-Cao, Thi Tuong Vy Phan, Trung-Hau Nguyen, Duc-Duy Ho, and Thanh-Canh Huynh. "A Low-Cost Prestress Monitoring Method for Post-Tensioned RC Beam Using Piezoelectric-Based Smart Strand." Buildings 11, no. 10 (September 25, 2021): 431. http://dx.doi.org/10.3390/buildings11100431.

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This study proposes a cost-effective prestress monitoring method for post-tensioned reinforced concrete (RC) beams using a smart strand. Firstly, the concept of a piezoelectric-based smart strand and its implementation for prestress force monitoring are developed. The smart strand is prepared by embedding inexpensive and high-sensitivity electromechanical impedance (EMI) sensors in a steel strand. Next, the feasibility of the proposed method is experimentally verified for prestress force monitoring of a simple supported post-tensioned RC beam. A smart strand prototype is fabricated and embedded into a 6.4 m RC beam which is then prestressed with different levels. For each prestress level, the EMI responses of the smart tendon are measured and the EMI features are extracted for prestress force monitoring. The results showed that the EMI signals of the smart strand showed strong resonant peaks that varied sensitively to the prestress level of the beam. The prestress change in the prestressed RC beam was successfully estimated by using linear regression models of the EMI features.

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Jiang, Yin Jun, and Yong Hua Zhu. "Simulation of Electric Heating Prestressed Concrete Component." Advanced Materials Research 243-249 (May 2011): 1018–22. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1018.

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Because channel quality defects of post-tensioned prestressed concrete construction cannot be discovered on time, an electric heating method is put forward to produce effective detection. The results of the numeric simulation on the temperature field of a prestressed concrete component show that the electric heating infrared detection method, for its energy consumption, efficiency and safety, is feasible for detecting the channel quality of prestressed concrete component, but the electric current needs to be controlled to avoid high temperature which affects the physical and mechanical properties of the strand and the concrete.

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Szydłowski, Rafał. "Concrete Properties for Long-Span Post-Tensioned Slabs." Materials Science Forum 926 (July 2018): 122–27. http://dx.doi.org/10.4028/www.scientific.net/msf.926.122.

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In contrast to foreign practice, in Poland, for many years, there has been a belief, that in prestressed constructions, more expensive concretes on basalt aggregates should be applied. This habit is due to the low quality of national river and fossil aggregates. They allow to obtain low concrete strength and modulus of elasticity. In the paper, basing on two examples of post-tensioned slabs, it has been shown, that it is possible to use concretes with a low value of modulus of elasticity for large-span slabs. These results may be significant in popularizing the use of post-tensioned slabs in buildings in poorer countries, making them cheaper in execution.

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Wight, Gavin D., Jason M. Ingham, and Andrew R. Wilton. "Innovative seismic design of a post-tensioned concrete masonry houseThis article is one of a selection of papers published in this Special Issue on Masonry." Canadian Journal of Civil Engineering 34, no. 11 (November 2007): 1393–402. http://dx.doi.org/10.1139/l07-104.

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Post-tensioned concrete masonry walls provide improved seismic performance, but have had limited application in seismic regions because of a lack of research pertaining to their in-plane response. Following focused research over recent years, a consortium of product suppliers has collaborated with the University of Auckland to construct New Zealand’s first post-tensioned concrete masonry house. A feature of this innovative design was that all incorporated products were commercially available, with no proprietary products being specifically developed for the prestressed masonry system used. Consequently, it is hoped that this house will be a showcase, and provide exposure for the technology in New Zealand and elsewhere. This paper provides a brief review of previous post-tensioned concrete masonry research applications, then discusses post-tensioning details and their application to house design and construction.

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Kraľovanec, Jakub, František Bahleda, Jozef Prokop, Martin Moravčík, and Miroslav Neslušan. "Verification of Actual Prestressing in Existing Pre-Tensioned Members." Applied Sciences 11, no. 13 (June 27, 2021): 5971. http://dx.doi.org/10.3390/app11135971.

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In the case of prestressed concrete structures, information about the actual state of prestressing is an important basis for determining their load-carrying capacity as well as remaining service life. During the service life of the prestressed concrete structure, the initial level of prestressing is inevitably reduced as a result of the actions of various factors. These reductions of prestressing force are considered as prestress losses, which are influenced by construction stages, used materials, prestressing technology, or required length of service life. Available standards enable the determination of the expected values of prestress losses. Ultimately, their calculation is part of the design procedure of every prestressed concrete structure. However, aging and often neglected infrastructure in Europe is also exposed to factors, such as environmental distress, that are not considered in standard calculations. Therefore, verified and reliable methods for determining the actual state of prestressing are needed. This paper presents an experimental program of an indirect method for the evaluation of the value of prestressing force in seven prestressed concrete sleepers. Particularly, the non-destructive saw-cut method as a pivotal object of this study is performed and assessed. Furthermore, the Barkhausen noise technique is used as a comparative method. Subsequently, the experimental campaign is supported by the numerical analysis performed in the ATENA 3D software. Finally, the experimentally determined values of residual prestressing force are compared to the expected level of prestressing according to Eurocodes.

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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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Liu, Hong Wei. "Shallow Talk Steel Strand Pre-Tensioned Prestressed Hollow Plate Beam Construction Craft and Quality Control." Applied Mechanics and Materials 204-208 (October 2012): 2278–81. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.2278.

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With the development of prestressing technology, steel strand first should the hollow plate beam of prestressed concrete get in the upper part structure of the highway bridge extensive application, to steel strand first should prestressed concrete hollow plate beam construction quality of quality, not only direct relation arrive bridge of normal usage, also in the meantime relation arrive bridge of safety degree and durable. Therefore acquaint with in the beam system make the process with control first a construction a craft with work well quality control the key being very. This text combine a construction to practice, to steel strand first should prestressed concrete hollow plate beam construction craft, quality control the etc problem make an introduction.

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Wang, Li, Donghui Cheng, Enxiang Qu, Daoming Zhang, and Chun Lv. "Calculation of Additional Internal Forces in Post-Tensioned Prestressed Concrete Frame Columns Based on Equivalent Lateral Stiffness." Buildings 12, no. 5 (May 12, 2022): 644. http://dx.doi.org/10.3390/buildings12050644.

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The additional internal forces in vertical members caused by prestressed tendons are typically overlooked in the design of post-tensioned prestressed concrete. A calculation method for additional internal forces in single-story multi-span prestressed concrete frame columns based on equivalent lateral stiffness is proposed in this paper. The slope-deflection equation for the bar element was presented using Timoshenko beam assumptions, taking into account the influence of shear and bending deformations. Subsequently, the concept of equivalent lateral stiffness and calculation equations were proposed. On this basis, the equations of the third shear and third bending moment for single-story multi-span prestressed frame columns were established. Furthermore, applying engineering examples, the method in this study was verified by ABAQUS software and previous methods. The results show that theoretical values and FEA results are in good agreement. Compared to previous methods, the method in this paper is more accurate and widely applicable. In addition, the stretching plan has a significant path effect and time-varying effect on the interlayer distribution of the third moment. It should be considered at the building stage to check the calculation of the frame column.

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Jin, Ling Zhi, Qiang Fu, Xia Cao, Ning Deng, Yi Hu Chen, Min Chen, and Xiao Ming Wan. "Ansys Analysis of Post-Tensioned Unbonded Prestressed Concrete Board with Open-Hole." Advanced Materials Research 163-167 (December 2010): 1349–53. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.1349.

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Owing to the outstanding advantages of unbonded prestressed technology, it has been widely used in high-rise building floor. However, with the continuous improvement of the function requirements of the building, the boards with openings become more and more common, not only in new constructions but also in renovation projects. These holes will change the mechanical properties of the original floor, and cause stress concentration around the holes easily. This article carries on the simulation analysis by modeling the experimental model using ANSYS software, focuses on the deflection, crack and ultimate load of unbonded post-tensioned prestressed concrete board with open-hole (under uniform load in tensioning and loading stage). After making the comparative analyses to the mechanical behavior and failure mechanism under the different locations of the holes, the simulation results are compared with experimental results, shows that ANSYS can simulate the whole process of loading better, provides theoretical basis for its application and promotion in practical engineering.

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Dissertations / Theses on the topic "Post-tensioned prestressed concrete construction"

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Maruri, Rodolfo Felipe. "Iterative computer analysis of post-tensioned concrete beams and frames." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/19510.

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West, Jeffrey Steven. "Durability design of post-tensioned bridge substructures /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Schokker, A. J. "Improving corrosion resistance of post-tensioned substructures emphasizing high performance grouts /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Herman, Reagan Sentelle. "Behavior of stiffened compression flanges of trapezoidal box girder bridges." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035950.

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Kajewski, Stephen L. "Post-tensioning and its effect on multi-level formwork load distribution." Thesis, Queensland University of Technology, 1998. https://eprints.qut.edu.au/36033/8/36033_Digitised_Thesis.pdf.

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Multi-level concrete buildings requrre substantial temporary formwork structures to support the slabs during construction. The primary function of this formwork is to safely disperse the applied loads so that the slab being constructed, or the portion of the permanent structure already constructed, is not overloaded. Multi-level formwork is a procedure in which a limited number of formwork and shoring sets are cycled up the building as construction progresses. In this process, each new slab is supported by a number of lower level slabs. The new slab load is, essentially, distributed to these supporting slabs in direct proportion to their relative stiffness. When a slab is post-tensioned using draped tendons, slab lift occurs as a portion of the slab self-weight is balanced. The formwork and shores supporting that slab are unloaded by an amount equivalent to the load balanced by the post-tensioning. This produces a load distribution inherently different from that of a conventionally reinforced slab. Through , theoretical modelling and extensive on-site shore load measurement, this research examines the effects of post-tensioning on multilevel formwork load distribution. The research demonstrates that the load distribution process for post-tensioned slabs allows for improvements to current construction practice. These enhancements include a shortening of the construction period; an improvement in the safety of multi-level form work operations; and a reduction in the quantity of form work materials required for a project. These enhancements are achieved through the general improvement in safety offered by post-tensioning during the various formwork operations. The research demonstrates that there is generally a significant improvement in the factors of safety over those for conventionally reinforced slabs. This improvement in the factor of safety occurs at all stages of the multi-level formwork operation. The general improvement in the factors of safety with post-tensioned slabs allows for a shortening of the slab construction cycle time. Further, the low level of load redistribution that occurs during the stripping operations makes post-tensioned slabs ideally suited to reshoring procedures. Provided the overall number of interconnected levels remains unaltered, it is possible to increase the number of reshored levels while reducing the number of undisturbed shoring levels without altering the factors of safety, thereby, reducing the overall quantity of formwork and shoring materials.

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Sicha, Jakub. "Statické řešení zastřešení nádrže." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409778.

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Al-khaja, Waheeb Ahmed Amin. "Time-dependent losses in post-tensioned prestressed concrete." Thesis, University of Leeds, 1986. http://etheses.whiterose.ac.uk/179/.

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An investigation has been undertaken into the factors affecting the time-dependent deformations, prestress losses and deflections of Class 1 uncracked prestressed concrete beams. The main influencing factors considered were environmental conditions, loading conditions,size and shape of members and concrete mix composition. Twenty seven beams consisting of both I- and rectangular sections with different concrete mixes, and tested under different environmental and loading conditions, were monitored for a period of one year. Tests were also conducted on short I- and rectangular beams and cylindrical control specimens to determine the shrinkage and creep properties of various concrete mixes including some with PFA and admixtures. A comprehensive assessment has been undertaken to determine the reliability of various methods of predicting deformations, prestress losses and deflections by comparing current prediction methods with experimental results obtained during this research programme. The use of experimentally determined material parameters for creep and shrinkageq is also considered in the prediction methods. Proposals are made for improving prediction by the current British Code: BS8110: 1985.

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Wu, Zhongxin. "Effective Post-Tensioned Splicing System for Prestressed Concrete Piles." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6605.

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Precast prestressed concrete piles are widely used in deep foundation construction. Due to unexpected site soil conditions and difficulties associated with transportation and handling long precast piles, splicing is sometimes necessary at the construction site. Available splicing methods utilize steel type connections that are more suitable for reinforced concrete construction and result in limited tensile capacity at the splice. This dissertation describes studies associated with the development of a new post-tensioned splicing system using staggered, embedded anchorages. The new system has the potential to provide the same tensile capacity as a one piece prestressed pile. To develop the post-tensioned splicing system it was necessary to conduct varied numerical analyses to solve immediate technical problems associated with the design, fabrication and testing of a prototype. This included the design of a self-stressing prestressing bed, optimization of the shape of the embedded anchorages and their layout within the piles being spliced. The focus of the dissertation is on non-linear finite element studies conducted to model the flexure behavior of prototype laboratory and full-sized spliced piles in comparison to their identical non-spliced counterpart. Though finite element analysis of prestressed elements is not new, issues relating to modeling post-tensioned, spliced elements with embedded, staggered anchorages have not been the subject of any previous investigation and constitute the principal contribution of this study. Nonlinear finite element analysis was conducted using ANSYS. The William-Warnke failure criterion used to establish concrete failure. A three-dimensional analysis was conducted in which SOLID65 element was used for modeling concrete and LINK8 for the prestressing strands. The post-tensioning ducts were modeled using PIPE20 elements. Perfect bond was assumed between the concrete and the ducts. Embedded anchorages were modeled as fixed locations within the concrete. Epoxy used to join the two splicing surfaces was modeled using contact elements. Since the layout of the post-tensioning ducts was staggered, a full model was required. In contrast, advantage was taken of symmetry for the analysis of the one piece controls. The finite element model was able to accurately capture the flexural behavior of both the control and the spliced piles. The results suggested that tensile separation at the splice interface acted as a pivot about which the section rotated. As a result, the compression failure zone in the spliced pile was confined to a smaller region compared to the control. The stress distribution in the spliced pile indicated that the concrete in the cover above the splice was crushed at the ultimate stage before the steel had yielded. As a result, the ultimate capacity of the spliced pile was controlled by concrete failure. The results also indicated that, among the multiple layers of post-tensioning strands, only one approached yield while others remained in the elastic range. As a result, when the applied load was released, the spliced pile rebounded back to a large degree, which resulted in a much smaller residual permanent deformation. This behavior of a spliced pile can be beneficial for structures in a seismic zone because it will induce smaller secondary moments. This study helped to refine and improve the new post-tensioned splicing system. Its availability makes it possible to extend and further improve the concept without the need for costly prototype fabrication and testing.

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Karimnassaee, Ali 1959. "FLEXURAL BEHAVIOR OF LIGHTLY REINFORCED UNBONDED POST-TENSIONED CONCRETE BEAMS." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/275510.

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Hengprathanee, Songwut. "Linear and Nonlinear Finite Element Analyses of Anchorage Zones in Post-Tensioned Concrete Structures." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/11253.

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Linear and nonlinear finite element analyses are used for the investigation of rectangular anchorage zones with the presence of a support reaction. The investigation is conducted based on four load configurations consisting of concentric, inclined concentric, eccentric, and inclined eccentric loads. The method of model construction is illustrated thoroughly. The influence of several parameters, including anchorage ratio, inclination of prestressing load, eccentricity, magnitude of the reaction force, bearing plate ratio, and the location of the reaction force, is studied. Both graphical and numerical presentations of the results from each load configuration are given. Improved equations, which are modified from the equations presented in the AASHTO Standard Specifications (2002), are proposed. The results from the equations are compared to those from the finite element method. Nonlinear finite element analysis is used to verify the applicability of the equations and to study a new bursting steel arrangement. Linear and nonlinear finite element analyses are also used for the study of non-rectangular anchorage zones. Four basic load configurations, including concentric, eccentric, inclined concentric, and inclined eccentric loads, are investigated. The shell element is selected for the construction of the finite element models. Several parameters, consisting of anchorage ratio, inclination of prestressing load, eccentricity, web thickness, ratio of web thickness to flange thickness, and flange width, are chosen for parametric studies. The results from the studies are presented graphically and numerically. Equations to calculate the bursting force and location of the force are developed from the Strut-and-Tie Model approach. The verification of the formulations and the investigation of bursting steel arrangement are conducted using nonlinear finite element analysis.
Ph. D.

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Books on the topic "Post-tensioned prestressed concrete construction"

1

Martin, Williams, ed. Post-tensioned concrete floors. Oxford: Butterworth-Heinemann, 1995.

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Fédération internationale du béton. Task Group 9.8., ed. Grouting of tendons in prestressed concrete. Lausanne, Switzerland: FIB, Fédération internationale du béton, 2002.

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Institute, Post-Tensioning, ed. Post-tensioning manual. 4th ed. Phoenix, AZ (301 W. Osborn, Suite 3500, Phoenix 85013): Post-Tensioning Institute, 1985.

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Institute, Post-Tensioning, ed. Post-tensioning manual. 5th ed. Phoenix, AZ: Post-Tensioning Institute, 1990.

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Fédération internationale du béton. Task Group 1.1., ed. Post-tensioning in buildings: Technical report. Lausanne, Switzerland: International Federation for Structural Concrete, 2005.

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O'Brien, J. Scott. Very early post-tensioning of prestressed concrete pavements. Austin, Tex: Center for Transportation Research, Bureau of Engineering Research, University of Texas at Austin, 1985.

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1932-, Breen J. E., American Association of State Highway and Transportation Officials., and United States. Federal Highway Administration., eds. Anchorage zone reinforcement for post-tensioned concrete girders. Washington, D.C: Transportation Research Board, National Research Council, 1994.

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Fédération internationale de la précontrainte. and Fédération internationale du béton, eds. Recommendations for the design of post-tensioned slabs and foundation rafts. London: SETO, 1998.

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Lee, Seung-Kyoung. An FHWA special study: Post-tensioning tendon grout chloride thresholds. McLean, VA: U.S. Department of Transportation, Federal Highway Administration, Research, Development and Technology, Turner-Fairbank Highway Research Center, 2014.

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Center, Turner-Fairbank Highway Research, ed. Magnetic-based NDE of prestressed and post-tensioned concrete members: The MFL system. McLean, VA (6300 Georgetown Pike, McLean 22101-2296): U.S. Dept. of Transportation, Federal Highway Administration, Research and Development, Turner-Fairbank Highway Research Center, 2000.

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Book chapters on the topic "Post-tensioned prestressed concrete construction"

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Gales, John, Kathleen Hartin, and Luke Bisby. "Contemporary Post-tensioned Concrete Construction." In SpringerBriefs in Fire, 7–15. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-3280-1_2.

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Friedrich, Thomas, and Ronald Klein-Holte. "Flexurally Rigid Support of Prestressed Hollow Core Slabs with Post-tensioned Beams." In High Tech Concrete: Where Technology and Engineering Meet, 1137–46. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_132.

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Pedersen, Ole Egholm, Niels Martin Larsen, and Dave Pigram. "Post-tensioned Discrete Concrete Elements Developed for Free-form Construction." In Advances in Architectural Geometry 2014, 15–28. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11418-7_2.

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Nawy, Edward G. "Stresses and End Cracks in Anchorage Zones of Post-Tensioned Prestressed Concrete Beams." In Progress in Structural Engineering, 229–56. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3616-7_16.

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Mańko, Zbigniew, and Tomasz Maciołek. "Evaluation of Usability and Service Life of Prototype Post- Tensioned Prestressed Concrete Spans of Railroad Viaduct After 25 Years Of Exploitation." In Transportation Infrastructure, 303–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-61092-9_25.

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Chong, Peter. "Bridge Widening – Stitching a steel girder reinforced concrete composite bridge to a post-tensioned prestressed voided deck structure." In Bridge design, construction and maintenance, 262–72. Thomas Telford Publishing, 2007. http://dx.doi.org/10.1680/bdcam.35935.0029.

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Aoyama, T., K. Igawa, H. Seki, and M. Abe. "PROPERTIES OF PRE-TENSIONED PRESTRESSED CONCRETE MEMBERS SUPPLIED WITH CATHODIC PROTECTION FOR TEN YEARS." In Challenges of Concrete Construction: Volume 3, Repair, Rejuvenation and Enhancement of Concrete, 329–37. Thomas Telford Publishing, 2002. http://dx.doi.org/10.1680/rraeoc.31753.0034.

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"Bonded post-tensioned structures." In Prestressed Concrete Design to Eurocodes, 101–14. CRC Press, 2011. http://dx.doi.org/10.1201/b12839-10.

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"Statically indeterminate post-tensioned structures." In Prestressed Concrete Design to Eurocodes, 115–66. CRC Press, 2011. http://dx.doi.org/10.1201/b12839-11.

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Evans, A. R. "THE REINSTATEMENT OF A POST-TENSIONED MARINE STRUCTURE – AN UNUSUAL CHALLENGE." In Challenges of Concrete Construction: Volume 6, Concrete for Extreme Conditions, 205–13. Thomas Telford Publishing, 2002. http://dx.doi.org/10.1680/cfec.31784.0020.

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Conference papers on the topic "Post-tensioned prestressed concrete construction"

1

Li, Shilan. "An Efficient Post-Tensioned Prestressed Concrete Bridge Construction Approach." In 2019 11th International Conference on Measuring Technology and Mechatronics Automation (ICMTMA). IEEE, 2019. http://dx.doi.org/10.1109/icmtma.2019.00035.

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"Rational Determination of Friction Losses in Post-Tensioned Construction." In SP-231: Ned H Burns Symposium on Historic Innovations in Prestressed Concrete. American Concrete Institute, 2005. http://dx.doi.org/10.14359/14924.

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Jiang, Dongqi. "Extending span ranges and accelerating construction of spread slab beam bridges." In IABSE Congress, Christchurch 2021: Resilient technologies for sustainable infrastructure. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/christchurch.2021.0229.

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<p>A new class of spread slab beam bridges has recently been developed and implemented in Texas. The research questions addressed in this paper are: how long can such a low profile bridge system span in either a simply supported or continuous form? And, can construction operations be accelerated, by design? An effective way to extend the span length is to utilize post-tensioning and to make the bridge continuous over several spans. In order to explore the maximum span limit, the design of a multi-span prestressed concrete spread slab beam bridge is investigated. In addition, a thicker and longer precast prestressed concrete panels (PCPs) that uses concentric pre-tensioned prestress is developed to facilitate accelerated bridge construction by reducing the need for field placement of deck reinforcement. It is shown that the span length may be extended from 15 m to 21 m as a continuous shallow profile bridge. The new solution for PCPs is verified to speed up field operations as compared to the traditional deck with stay-in-place PCPs and cast-in-place toppings.</p>

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Low, Hin Foo, Sih Ying Kong, and Daniel Kong. "A Review on Prestressed Transfer Plate Analysis and Design." 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.2018.1037.

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<p>Prestressed transfer plate consists of a thick cast in-situ post-tensioned concrete slab supporting multi-storey shear walls at building transition level. Compared to conventional reinforced concrete transfer beams, it offers savings in concrete volume of 10-15%, cuts steel reinforcement content by 35-50% and significantly reduces formwork usage which eventually helps to achieve lower carbon footprint for a more sustainable transfer floor construction. The design of prestressed transfer plates is complicated owing to its two-way bending behaviour and irregular load path from reactions of numerous shear walls. This paper elaborates the analysis of prestressed transfer plates and discusses their interaction effect with shear walls. It also explains the design of interfacing shear for thick plate construction with multi-layer casting in addition to various design considerations including flexural and punching shear design based on relevant codes of practice.</p>

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Jing-Yuan, Bai, and Bin Yan. "Application status and developing foreground of CRTS Ⅲ ballastless track." 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.2018.0632.

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<p>The technology of high-speed railway is one of the central driving forces in national economic growth. To increase the speed of high-speed trains and ensure their safety, the research and development of brand-new ballastless track techniques are of vital significance. This article simply talked about China's domestically designed CRTS III ballastless track. This technique is famous for some technical characteristics: it replaced CA mortar with self-compacting concrete as adjustment layer, which not only simplified the structure but also reduced the cost; 2-D scalable steel mould was adopted to materialize the track slab with high precision shoulder post-tensioned prestressed spatial curved space, which simplified the construction craft a lot; it adopted flexible longitudinal coupled structure of the subgrade as bridge-tunnel unit structure, which weakened the influence of temperature stress; unit-separated structure and flexible-separated structure were widely used, which made the maintainability of all unit structure. This article was based on the analysis of these technical characteristics and discussed the application status and developing foreground of this technique in some way.</p>

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"Prestressed Concrete Girder Repair with CFRP Post-Tensioned Rods." In SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium. American Concrete Institute, 2011. http://dx.doi.org/10.14359/51682470.

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Liu*, Sixin, and Lei Fu. "GPR Signals Analysis of Post-tensioned Prestressed Concrete Girder Defects." In International Conference on Engineering Geophysics, Al Ain, United Arab Emirates, 15-18 November 2015. Society of Exploration Geophysicists, 2015. http://dx.doi.org/10.1190/iceg2015-016.

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"Anchorage Zone Cracking of Post-Tensioned Bridge Decks with Closely Spaced Anchors." In SP-113: Cracking in Prestressed Concrete Structures. American Concrete Institute, 1989. http://dx.doi.org/10.14359/3000.

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"Advances in Post-Tensioned Parking Facilities Seismic Design." In SP-231: Ned H Burns Symposium on Historic Innovations in Prestressed Concrete. American Concrete Institute, 2005. http://dx.doi.org/10.14359/14928.

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"Flexural Cracking Behavior of Partially Prestressed Pretensioned and Post-Tensioned Beams--State of the Art." In SP-113: Cracking in Prestressed Concrete Structures. American Concrete Institute, 1989. http://dx.doi.org/10.14359/2996.

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Reports on the topic "Post-tensioned prestressed concrete construction"

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Nema, Arpit, and Jose Restrep. Low Seismic Damage Columns for Accelerated Bridge Construction. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, December 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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