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.
出处
《地震工程与工程振动》
CSCD
北大核心
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)
关键词
FRP
塑性铰抗震加固
抗震混合试验
试验单元
Open
SEES
fiber reinforced polymer
retrofit in the plastic hinge region
hybrid simulation
experimental element
OpenSees
