FRP约束RC矩形空心截面桥墩抗震性能  

Seismic Performance of FRP Confined Bridge Pier of Rectangular Hollow Section

作　　者：杜修力[1,2] 董振华[1,2] 韩强[1,2] 王作虎[3] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]首都世界城市顺畅交通协同创新中心,北京100124 [3]北京建筑工程学院土木与交通工程学院,北京100124

出　　处：《北京工业大学学报》2014年第2期214-222,共9页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(50938006);北京市教育委员会科研计划项目(KZ201410005011);国家重点基础研究发展计划项目(2011CB013602)

摘　　要：为了研究纤维增强复合材料(FRP)约束不同长细比中空截面墩柱的抗震性能,设计并制作了长细比分别为4和8的RC矩形中空截面墩柱,进行了单向水平低周反复荷载作用下的拟静力试验,分析了不同FRP约束墩柱的破坏特征、抗震性能和二次弯矩效应.研究结果表明:FRP约束对长细比较大墩柱的极限变形提高约16%,而墩柱最大承载力和极限承载力仅提高约5%,且减轻了短墩柱的捏缩效应和中长柱的二次弯矩效应;此外,对比分析了不同种类FRP约束不同长细比矩形空心墩柱的墩顶水平位移-力、塑性铰区截面的转动变形-弯矩的模拟值和试验值,其变化规律与试验结果吻合较好.In order to study on seismic performance of fiber reinforced polymer confined hollow section column of different slenderness ratio, the RC rectangular hollow section columns with slenderness ratio of 4 and 8 were designed. Quasi-static test was carried out to the tested columns, and the failure characteristic, seismic performance and additional moment were analyzed. The experimental result shows that ultimate lateral displacement of FRP confined hollow section columns with slenderness ration of 8 is increased by 16%. However, the maximal lateral force and ultimate lateral force is increased about 5% ; pinch-shrinking effect of confined tested column with slenderness ration of 4 is reduced, while the additional moment of confined tested column with slenderness ration of 8 is reduced. Besides, comparing the measured lateral force-displacement of the top of tested columns and rotation deformation-moment of plastic hinge region for FRP confined columns with simulated results, it is shown that the simulated results have good agreement with experimental results.

关 键 词：桥墩 纤维增强复合材料约束 拟静力试验 抗震性能 矩形空心截面墩柱 

分 类 号：TU375.4[建筑科学—结构工程]