配置不锈钢钢筋混凝土桥墩抗震性能试验研究  

Experimental Investigation of Stainless Steel Reinforced Concrete Bridge Piers Under Cyclic Loading

作　　者：付建宇 王东升 张蒙[3] 张鹏颺 葛笑 孙治国 FU Jianyu;WANG Dongsheng;ZHANG Meng;ZHANG Pengyang;GE Xiao;SUN Zhiguo(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China;Hebei Expressway Yanchong Management Center,Zhangjiakou 075400,China;Institute of Disaster Prevention,Sanhe 065201,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]河北工业大学土木工程技术研究中心,天津300401 [3]河北省高速公路延崇管理中心,河北张家口075400 [4]防灾科技学院土木工程学院,河北三河065201

出　　处：《应用基础与工程科学学报》2023年第1期170-184,共15页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51778206)。

摘　　要：跨海桥梁工程中采用不锈钢钢筋可有效提升其在海洋腐蚀环境下的耐久性能,而配置不锈钢钢筋的混凝土桥墩抗震性能尚缺少足够的研究.设计了2根配置不锈钢钢筋和1根配置普通钢筋的混凝土桥墩试件,分别进行拟静力加载试验,详细对比各试件的抗震性能指标,使用VIC⁃3D系统对桥墩底部(塑性铰区)变形和应变进行测量.结果表明,配置不锈钢钢筋与普通钢筋桥墩试件相比,屈服荷载和位移变形能力更大,但墩底混凝土剥落高度较高,箍筋外露明显,原因可能是不锈钢钢筋与混凝土粘结弱.位移角大于2%后,配置普通钢筋桥墩试件具有较高的耗能能力.通过对桥墩变形成分分析可知,两者弯曲变形较为一致,而不锈钢钢筋的桥墩滑移变形(纵筋拔出)占比略高.总体上看,配置不锈钢钢筋和配置普通钢筋桥墩具有相当的抗震性能.The application of stainless steel as reinforcement can boost the durability of sea⁃crossing bridges in ocean environment,while the study on the seismic performance of stainless steel reinforced concrete bridge piers is in need.A set of quasi⁃static tests on two RC bridge piers reinforced by stainless steel(SS)and a control specimen reinforced by conventional carbon steel(CS)are presented in this work.Seismic indexes of all the specimens are compared.VIC⁃3D system is used to measure the deformation of the column bottom(plastic hinge area).Experimental results indicate that SS columns have higher yield strength and deformation capacity.However,longer concrete cover spalling length and more significant spiral exposure are observed in the tests.This is caused by the lower bonding strength of SS specimens.When the drift ratio is greater than 2%,the CS specimen has better performance in energy dissipation.The deformation capacity analysis shows both types of the specimens exhibit similar flexural behavior.The slip between reinforcement and concrete of SS specimens is severer than that of the control specimen.Overall,SS/CS reinforced concrete bridge piers exhibit comparable seismic capacity.

关 键 词：不锈钢钢筋 混凝土桥墩 拟静力试验 抗震性能 变形成分 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]