Seismic Performance of Precast Segmental Bridge Columns Reinforced with Both Stainless-Steel Bars and GFRP Bars

被引:29
作者
Jia, Junfeng [1 ,2 ]
Wei, Bo [1 ]
Bai, Yulei [1 ]
Wu, Suiwen [3 ]
Zhang, Kaidi [1 ]
Guo, Yang [4 ]
机构
[1] Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100083, Peoples R China
[2] Minist Transport, Res Inst Highway, Beijing 100088, Peoples R China
[3] Univ Nevada, Dept Civil & Environm Engn, Reno, NV 89557 USA
[4] Beijing Urban Construct Rd & Bridge Grp Co Ltd, Beijing 100088, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金; 北京市自然科学基金;
关键词
Precast segmental bridge columns; Cyclic load testing; Seismic performance; Stainless steel bars; GFRP bars; CONCRETE COLUMNS; BEHAVIOR; CONSTRUCTION; CORROSION; STRENGTH; CONNECTIONS; DURABILITY; STATE;
D O I
10.1061/(ASCE)BE.1943-5592.0001810
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
An innovative precast segmental bridge column (PSBC) was proposed to achieve a better durability performance in an aggressive coastal environment, which was reinforced with both longitudinal stainless steel (SS) bars and glass fiber reinforced polymer (GFRP) bars. Four 3/20-scale PSBCs with various ratios of GFRP to SS bars were tested quasi-statically. Test results showed that compared to SS-reinforced PSBCs (SR-PSBCs), the SS-GFRP-reinforced PSBCs (SFR-PSBCs) exhibited higher displacement ductility, less stiffness degradation, lower postyield stiffness ratios, and smaller residual drift ratios, although they presented lower lateral loading capacity and energy dissipation. Increasing the ratio of longitudinal GFRP bar to SS bar in SFR-PSBCs resulted in higher displacement ductility performance and more gentle stiffness degradation behavior. Furthermore, the increase of axial load affects the seismic behavior of SFR-PSBCs in an unfavorable way, which could result in severer damage, significant reduction in the displacement ductility, faster stiffness degradation beyond the peak lateral strength point, and increase in the residual displacement.
引用
收藏
页数:13
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