Structural behavior of corroded pretensioned prestressed concrete beams subjected to high-cycle fatigue loading

被引：0
|
作者：
Liu X. [1 ,2 ]
Zhang W. [2 ]
Ye Z. [2 ]
Gu X. [2 ]
机构：
[1] State Key Laboratory of Green Building in Western China, Xi'an University of Architecture & Technology, Xi'an
[2] Key Laboratory of Performance Evolution and Control for Engineering Structures of the Ministry of Education, Tongji University, Shanghai
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 01期
关键词：
Corrosion; Fatigue damage; Fatigue test; Prestressed concrete beam; Structural behavior;
D O I：
10.14006/j.jzjgxb.2019.01.010
中图分类号：
学科分类号：
摘要：
An experimental study was performed on the structural behavior of corroded pretensioned prestressed concrete beams subjected to high-cycle fatigue loading. A three-dimensional laser scanning technique was employed to obtain the geometric models of corroded prestressing wires. It is observed that the prestressing wires fracture at the smallest cross-section where the corrosion pits have formed. The initial stiffness of corroded prestressed concrete beams dramatically decreases after cyclic loading, its cracking load is close to the ultimate load, and the beams exhibite a trend of brittle failure. With increased cycle ratios, significant reduction is found in the ultimate strain of corroded prestressing wires. The ductility of rebars is sensitive to high-cycle fatigue loading, and the post-yield branch becomes shorter with increased fatigue damage. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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页码：89 / 96
页数：7
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