低周荷载下FRP约束RC矩形空心墩的抗震性能试验研究  

Anti-Seismic Performance of Rectangular Hollow Section of Bridge Pier with FRP Confinement under Reversal Load

作　　者：董振华[1] 贾俊峰[1] 韩强[1] 

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

出　　处：《重庆交通大学学报（自然科学版）》2013年第S1期827-831,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：北京工业大学博士启动基金项目(X0004015201201);中国博士后科学基金项目(2012M510300);高等学校博士学科点专项科研基金项目(20121103120022)

摘　　要：为了评价FRP约束RC空心墩的抗震性能,设计并制作了5个未约束和FRP约束矩形空心墩,并进行了恒轴压、水平单向低周反复荷载下的拟静力试验。通过对比分析了不同试验墩的滞回曲线、水平力和延性、总耗能和耗散系数。结果表明:FRP约束矩形空心墩的塑性铰区,可提高其抗侧刚度、改善其耗能能力和延性、提高其变形能力,且空心墩的抗震滞回耗能能力较稳定,但是,对水平力的影响较小。此外,耗散系数与总耗能的变化趋势不同,因此,评价RC空心墩耗能能力时,应综合考虑总耗能和耗散系数。In order to estimate the anti-seismic performance of FRP-confined RC bridge pier with hollow section,five unconfined and confined bridge piers with rectangular hollow section were designed and established.And then quasi-static experiment was carried out under constant axial compression and unidirectional horizontal reversal load.Comparing hysteretic curves,lateral force and ductility as well as energy dissipation of different specimen piers,it is shown that through confining plastic hinge region of the tested bridge pier by FRP,lateral rigidity and ultimate displacement are increased;energy dissipation and ductility are improved.However,it has more considerable effective ductility than load capacity.Besides,variation trend of dissipation coefficient is different with total energy dissipation.Therefore,dissipation energy coefficient and total energy dissipation should be considered at the same time to estimate energy dissipation ability of RC hollow section bridge pier.

关 键 词：桥墩 纤维增强复合材料 拟静力试验 抗震性能 矩形空心截面 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] U442.55[交通运输工程—道路与铁道工程]