CFRP约束插槽式双柱墩抗震性能研究  

Study on seismic performance of CFRP constrained fabricated double column pier based on reinforcement hysteretic model

作　　者：李帆 左武旭 刘中宪 LI Fan;ZUO Wuxu;LIU Zhongxian(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;Tianjin Institute of Earthquake Engineering,Tianjin 300384,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]天津市地震工程研究所,天津300384

出　　处：《河北工业大学学报》2024年第2期85-90,共6页Journal of Hebei University of Technology

基　　金：国家自然科学基金资助项目(51878434)。

摘　　要：研究了CFRP约束插槽式双柱墩的抗震性能,利用ABAQUS软件建立考虑了钢筋循环退化效应的桥墩模型,重点分析了CFRP的厚度和约束范围对桥墩抗震性能的影响。在横向地震荷载作用下,双柱墩发生弯曲破坏,基础和盖梁的塑性铰区混凝土被压碎。CFRP厚度增加,混凝土的被动约束增强,桥墩的屈服荷载、极限荷载和耗能等抗震性能指标提高,且残余位移减小;CFRP约束在塑性铰区比约束在非塑性铰区,抗震性能改善显著。In this paper,the seismic performance of slotted double column pier restrained by CFRP is studied.The pier model considering the cyclic degradation effect of reinforcement is established by using ABAQUS software,and the influ⁃ence of CFRP thickness and restraint range on the seismic performance of pier is analyzed.Under the action of trans⁃verse seismic load,the double column pier is bent and damaged,and the concrete in the plastic hinge area of the founda⁃tion and bent cap is crushed.With the increase of CFRP thickness,the passive restraint of concrete is strengthened,the seismic performance indexes such as yield load,ultimate load and energy dissipation of pier are improved,and the resid⁃ual displacement is reduced;The seismic performance of CFRP confined in plastic hinge area is significantly better than that confined in non plastic hinge area.

关 键 词：装配式双柱墩 CFRP约束 插槽式 钢筋循环退化效应 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]