FRP加固混凝土连续梁桥抗震混合试验研究  

Hybrid simulation of a continuous RC girder bridge retrofitted by FRP

作　　者：田石柱[1,2] 贾红星[1] 林元铮 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150096 [2]苏州科技学院土木工程学院,江苏苏州215011

出　　处：《地震工程与工程振动》2015年第5期92-98,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51278322;51308368);江苏省高校基金重大项目(13KJA560002)

摘　　要：本文对某钢筋混凝土连续梁桥利用FRP布进行了塑性铰抗震加固,并通过不同地震作用下的整体结构抗震混合试验,研究了该桥梁结构利用FRP抗震加固的效果。试验主要利用子结构试验方法,将未加固和FRP加固后的桥墩作为试验单元,进行实际物理试验加载,而将其他部分作为计算单元在有限元软件Open Sees内建模,通过集成协调,实现整体结构的抗震试验。试验结果表明,使用FRP加固能够有效改善桥梁的抗震性能。One continuous reinforced concrete （RC） girder bridge is retrofitted with unidirectional fiber reinforced polymer （FRP） composite sheets in the plastic hinge region of the piers. The results of hybrid simulation performed on a continuous girder bridge retrofitted by FRP jackets are presented in this paper. In the hybrid simulation, the piers with/without FRP jackets which are regarded as experimental elements, are physically tested in the lab while the remaining bridge structure is simulated numerically in OpenSees. After integration and combination between dif- ferent types of element, the responses of the overall bridge structure under seismic action are obtained. From the testing data, it is concluded that the load carrying capacity and the seismic performance of the retrofitted specimen have been promoted, when comparing with the one that has not been strengthened by FRP composite jacket.

关 键 词：FRP 塑性铰抗震加固 抗震混合试验 试验单元 Open SEES 

分 类 号：TU317[建筑科学—结构工程]