Results 21 to 30 of about 216 (114)
Effect of Prestress Levels and Jacking Methods on Friction Losses in Curved Prestressed Tendons
Applied Sciences, 2017 The effects of prestressing methods and prestress levels on the friction losses of prestressed tendons were evaluated in this study. Two full-scale prestressed concrete girders were fabricated and used for the friction loss experiment.
Sungnam Hong
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Buildings, 2023 Despite the potential advantages of 18 mm strands, the limited research on the behavior of girders with larger-diameter strands hinders the application in bridges. Transfer length and prestress losses are two important indicators.
Xin Jiang +6 more
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Sensors, 2012 For the safety of prestressed structures, prestress loss is a critical issue that will increase with structural damage, so it is necessary to investigate prestress loss of prestressed structures under different damage scenarios.
Chunguang Lan, Zhi Zhou, Jinping Ou
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Case Studies in Construction Materials, 2023 Using prestressed carbon fiber reinforced polymers (CFRPs) is a promising technique for strengthening reinforced concrete (RC) structures. This study aimed to investigate the prestress losses and flexural behavior of strengthened RC beams under wetting ...
Xiaoda Li +3 more
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State-of-the-Art Review on Determining Prestress Losses in Prestressed Concrete Girders [PDF]
Applied Sciences, 2020 Prestressing methods were used to realize long-span bridges in the last few decades. For their predictive maintenance, devices and dynamic nondestructive procedures for identifying prestress losses were mainly developed since serviceability and safety of Prestressed Concrete (PC) girders depend on the effective state of prestressing.
Marco Bonopera +2 more
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Applied Sciences, 2022 This paper proposes using neutral axis locations to monitor and quantify the prestress force in post-tensioned precast segmental beams. Strain measurements are used to obtain the neutral axis locations of specific cross-sections of the precast ...
Han Li +5 more
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Probabilistic Assessment of Prestress Loss in Pretensioned Prestressed Concrete [PDF]
PCI Journal, 1995 The effects of variability in the parameters used to calculate prestress loss are evaluated by a probabilistic prestress loss computer program. The program accounts for the time-dependent effects caused by creep, shrinkage, and steel relaxation. Losses caused by elastic shortening of the prestressed concrete member are also calculated.
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EM-Based Monitoring and Probabilistic Analysis of Prestress Loss of Bonded Tendons in PSC Beams
Advances in Civil Engineering, 2018 The prestress level is a key factor of prestressed concrete (PSC) beams, affecting their long-term serviceability and safety. Existing monitoring methods, however, are not effective in obtaining the force or stress of embedded tendons.
Zheheng Chen, Shanwen Zhang
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The Interfacial Friction Loss of Prestressed Carbon-Fiber Tendons in a Bending State
Buildings, 2022 Carbon-fiber reinforced plastic (CFRP) is ideal for bridge reinforcement due to its high strength, light weight, and corrosion resistance. Studies on the friction loss of CFRP tendons in a bending state form an important part of advancing the application
Jiaping Fu +5 more
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BuildingsThe prestress loss of prefabricated continuous beam bridges directly affects their stress state and operating conditions. Excessive prestress loss can lead to increased mid span deflection of the main beam, cracking of the web and bottom plates, reduced ...
Jilei He +5 more
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