Relevant bibliographies by topics / Post-tensioned prestressed concrete construction – Evaluation

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

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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

1

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 (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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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 (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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Cao, Zhiliang, Hao Wang, and Tong Guo. "Fragility analysis of self-centering prestressed concrete bridge pier with external aluminum dissipators." Advances in Structural Engineering 20, no. 8 (2016): 1210–22. http://dx.doi.org/10.1177/1369433216673376.

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A novel self-centering prestressed concrete pier with external energy dissipators has been developed to realize seismic resilient performance and enhanced corrosion-resisting property. Self-centering capacity of the pier is provided by the unbonded post-tensioned tendons and damage is mostly concentrated on the replaceable dissipators. To investigate the seismic behavior of the proposed pier, a detailed analytical model considering interface opening and dissipator deformation was developed and verified through existing cyclic load tests. Based on the proposed model, a prototype reinforced concrete pier and a self-centering prestressed concrete pier with similar backbone curves are designed, and fragility analyses are conducted on the two piers through incremental dynamic analysis. One maximum drift-based performance limit state (i.e. collapse prevention) and two residual drift-based performance limit states (i.e. emergent usage and reconstruction) are defined for seismic capacity evaluation. Fragility curves indicate that the self-centering prestressed concrete pier has a slightly higher peak drift demand owing to its inferior dissipating capacity as compared with the reinforced concrete pier, while sustains a much lower residual drift demand due to its inherent self-centering characteristic.
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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 (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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Whelan, Matthew J., Brett Q. Tempest, and David B. Scott. "Post-Fire Nondestructive Evaluation of a Prestressed Concrete Double-Tee Joist Roof." Journal of Performance of Constructed Facilities 29, no. 2 (2015): 04014055. http://dx.doi.org/10.1061/(asce)cf.1943-5509.0000543.

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

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The longitudinal joints on adjacent precast, prestressed box beams used in bridge construction are vulnerable to cracking. These cracks provide a direct path for water and deleterious agents to enter the structural system, causing corrosion of the embedded steel bars and tendons. To avoid significant maintenance costs, safety concerns, or both, an innovative longitudinal joint between two adjacent box beams was designed in the current study. This joint is 6½ in. wide with roughened surfaces, filled with shrinkage compensating concrete and reinforced by steel bars. The joint was evaluated on a small-scale basis and satisfactory performance was obtained in resisting early-age cracks. In the current paper, the joint design is further evaluated through experiments on a 31 ft long specimen during the joint’s early age, and when it is subjected to multiple levels of cyclic loads. A finite element (FE) model that is capable of simulating the early-age concrete hardening was also developed and validated against the experimental data. The early-age, time-dependent stress development in the joint and at the interface of the joint and box beam was investigated using the FE model. Based on the results of laboratory tests and FE simulations, the innovative joint was found to remain crack free without the utilization of a shear key or transverse post-tensioning. The “compression-dominate” joint created by the expansive joint material and transverse reinforcing bars across the interface is expected to address the issues associated with early age, while ensuring the long-term durability and performance of box-beam bridges.
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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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Jeon, Chi-Ho, and Chang-Su Shim. "Flexural Behavior of Post-Tensioned Concrete Beams with Multiple Internal Corroded Strands." Applied Sciences 10, no. 22 (2020): 7994. http://dx.doi.org/10.3390/app10227994.

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The corrosion of prestressing steel in prestressed concrete bridges is a critical safety issue. To evaluate the strength of a prestressed concrete beam with corroded strands, it is necessary to know the mechanical properties of the corroded strands in terms of their tensile strength and ductility. In this study, material models were suggested using tensile tests of corroded strands which had been taken from existing bridges. Five prestressed concrete beams with multiple internal corroded strands of different corrosion levels and locations were fabricated and tested using the three-point bending test. The beams with corroded strands near the support did not show meaningful flexural behavior changes, while the beams with corrosion in the mid-span showed significant strength reduction. In order to suggest the appropriate evaluation of the flexural strength of a prestressed concrete beam with corroded strands, material models of the corroded strands were divided into two model categories: a bi-linear material model and a brittle material model. Strength evaluations of the corroded prestressed concrete beams according to fps approximation and strain-compatibility using OpenSEES were conducted. Results suggested the use of the strain compatibility method only when the section loss was greater than 5%.
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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 (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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Dissertations / Theses on the topic "Post-tensioned prestressed concrete construction – Evaluation"

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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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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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Salas, Pereira Rubén Mario. "Accelerated corrosion testing, evaluation and durability design of bonded post-tensioned concrete tendons." 2003. http://wwwlib.umi.com/cr/utexas/fullcit?p3118069.

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Salas, Pereira Rubén Mario 1968. "Accelerated corrosion testing, evaluation and durability design of bonded post-tensioned concrete tendons." 2003. http://hdl.handle.net/2152/12506.

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Lee, Jun Ki 1975. "Evaluation of external post-tensioned tendons using vibration signatures." Thesis, 2007. http://hdl.handle.net/2152/3490.

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Recent findings regarding corrosion of post-tensioned bridges have highlighted the urgent need to develop reliable methods to predict the behavior of the structural system after damage has occurred and inspection techniques to assess the condition of the structure. Corrosion in strands is undesirable in that it often progresses without visual signs of distress, but may cause a brittle failure. To complicate the inspection, access to the strands for visual inspection is usually blocked by the concrete cross section. To date, significant efforts have been taken to improve the durability of the post-tensioned bridges. However, the behavior of the post-tensioned bridges with corrosion damage is not clearly understood and the currently available inspection techniques tend to provide only limited information about the nature and extent of the damage. The research project discussed in this dissertation was developed is to evaluate the feasibility of using the vibration technique to detect and estimate the extent of damage in an external tendon due to corrosion. To accomplish this goal, damage was induced in five specimens, which were monitored periodically to correlate the measured changes in the frequency response to the level of damage. The induced damage simulated the degradation of a post-tensioned structure from corrosion. This dissertation describes the experimental program and the numerical scheme used to estimate the condition of the specimens. Three types of specimens were tested during the experimental phase of the research: individual strands, cables specimens, and external tendons. A series of tension tests of individual strands were conducted to investigate changes in the uniaxial behavior after damage was induced. Simulated damage included uniform corrosion of the strand, mechanical wire cuts, and an initial defect in one wire. Three cable specimens and one tendon specimen were subjected to fatigue loading. The loading was selected to simulate the loss of cross-sectional area in the strands, and also caused grout damage. The frequency response of the specimens was recorded periodically during the fatigue tests and acoustic sensors were used to detect the occurrence of wire breaks. A second tendon specimen was exposed to an acid solution to simulate the hydrogen induced cracking in the strand at three different locations along the length of the specimen. A number of wires fractured during the exposure test and damage was inspected visually. Natural frequencies were also measured periodically. The residual prestressing force in of the specimens was extracted from the measured natural frequencies. The stiff string model was used to determine optimum values of tension and flexural stiffness from the frequency response. The numerical results from this optimization demonstrated the feasibility of using the vibration technique as a nondestructive testing method for external tendons.
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Johnson, Stacy Tawfig Kamal Mtenga Primus V. "Analytical modeling of fiber reinforced post-tensioned concrete anchorage zones." 2006. http://etd.lib.fsu.edu/theses/available/etd-07052006-101416.

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Thesis (M.S.)--Florida State University, 2006.<br>Advisor: Kamal Tawfig and Primus Mtenga, co-advisors, Florida State University, College of Engineering, Dept. of Civil & Environmental Engineering. Title and description from dissertation home page (viewed Sept. 15, 2006). Document formatted into pages; contains ix, 87 pages. Includes bibliographical references.
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Medina, Chávez César Iván. "Development and implementation of a mechanistic-empirical design procedure for a post-tensioned prestressed concrete pavement (PCP)." 2003. http://wwwlib.umi.com/cr/utexas/fullcit?p3116120.

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

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

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

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Ghorbanpoor, Alireza. Evaluation of post-tensioned concrete bridge structures by the impact-echo technique. U.S. Dept. of Transportation, Federal Highway Administration, 1993.

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Ghorbanpoor, Alireza. Evaluation of post-tensioned concrete bridge structures by the impact-echo technique. U.S. Dept. of Transportation, Federal Highway Administration, 1993.

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Ghorbanpoor, Alireza. Evaluation of post-tensioned concrete bridge structures by the impact-echo technique. U.S. Dept. of Transportation, Federal Highway Administration, 1993.

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Youakim, Samer Amir. A simplified method for prediction of long-term prestress loss in post-tensioned concrete bridges. Dept. of Structural Engineering, University of California, San Diego, 2006.

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Stevenson, A. M. Post-tensioned concrete floors in multi-storey buildings: An introduction to the development, benefits, design and construction of in-situ prestressed suspended floors. British Cement Association on behalf of the industry sponsors of the Reinforced Concrete Council, 1994.

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

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Institute, Post-Tensioning, ed. Post-tensioning manual. 4th ed. Post-Tensioning Institute, 1985.

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Post-tensioning manual. Post-Tensioning Institute, 2006.

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

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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. 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. Thomas Telford Publishing, 2007. http://dx.doi.org/10.1680/bdcam.35935.0029.

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

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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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Ghorbanpoor, Al. "Magnetic-based NDE of steel in prestressed and post-tensioned concrete bridges." In Non-Destructive Evaluation Techniques for Aging Infrastructure & Manufacturing, edited by Ronald D. Medlock and David C. Laffrey. SPIE, 1998. http://dx.doi.org/10.1117/12.300105.

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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. International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.1037.

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&lt;p&gt;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.&lt;/p&gt;
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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. International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/christchurch.2021.0229.

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&lt;p&gt;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.&lt;/p&gt;
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Wang, Shen, and Javeed A. Munshi. "Evaluation of Tendon Anchorage Zone Stresses in Prestressed Concrete Nuclear Containment Using Detailed Finite Element Analysis." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-54014.

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Nuclear containments serve the critical function of providing a leak proof boundary for containment of radiation in nuclear power plants. The containments are, generally, steel, reinforced concrete or prestressed concrete depending upon the diameter and internal design pressure. Prestressed concrete containments are used in large nuclear containments with significant design internal pressure. In these situations, the externally applied prestressing serves to counter internal design pressure due to LOCA (loss of coolant accident) and other accident loads thus reducing the required thickness and reinforcement demand. The prestressing tendons are placed in sheathing within the concrete. After the concrete achieves its required strength, the tendons are stretched and locked off against the ends of the concrete called anchorage zones. These anchorage zones are thus subjected to substantial compressive and splitting stresses and need to be properly designed and detailed. Since anchorage zones are the primary location of the prestressing force transfer to concrete, they experience very large and localized bearing and splitting stresses which can have significant safety and structural consequences for the containment integrity. Simple analysis based on strut-and-tie model is generally used for design of prestressed concrete anchorage zones. But because of the stress concentrations and potential impact to structural integrity, it is prudent to utilize detailed finite element method to verify and/or substantiate the results from simple analysis. The finite element (FE) analysis of tendon anchorage zone requires a refined mesh in order to capture the geometry of details surrounding tendons. This paper presents a detailed and practical finite element model used to perform a comprehensive stress analysis of an anchorage zone of a large post-tensioned containment. Both local and general anchorage zones are evaluated. A fictitious case of tendon anchorage zone is established as an example case based on typical parameters of nuclear plants. A 3D finite element model is then developed using ANSYS Version 13.0, in which the effect of tendon sleeve / sheathing into concrete is modeled explicitly. This paper also discusses anchorage zone analysis approaches in various state-of-the-practice codes and standards using hand calculations. The result of finite element analysis are compared with analyses using various hand calculation approaches. In particular, importance of adequate reinforcement design and detailing in anchorage regions is discussed based on the stress profiles from FE analysis and compared with hand calculation methods. It is concluded that a detailed finite element evaluation of anchorage regions is necessary to develop a level of confidence required for ensuring safety and integrity of nuclear containments. The FE modeling also serves as verification for results from simple hand calculation methods.
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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. International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0632.

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&lt;p&gt;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.&lt;/p&gt;
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