高强钢筋高强混凝土框架结构非线性地震反应分析

Nonlinear seismic response analysis of a high-strength concrete frame structure reinforced with high-strength bars

研究配有高强钢筋的高强混凝土框架结构的抗震性能。采用OpenSees开放式软件对配有高强钢筋的高强混凝土框架结构进行了地震作用下的非线性有限元分析,并将计算结果与同等参数条件下的结构拟动力试验进行了对比。得到不同峰值加速度情况下的结构层间反应时程曲线,层间位移滞回曲线,以及破坏模式等,数值计算结果与试验吻合程度较好。研究结果表明利用基于OpenSees的有限元分析方法,能够有效地分析配有高强钢筋的高强混凝土框架结构的地震响应,可以辅助研究该结构的抗震性能。

The nonlinear seismic response analysis of a two-story high-strength concrete frame structure is completed by using OpenSees software,which installed high-strength transverse and partly longitudinal reinforcement.The placement of the high-strength bars is to increase the ductility of the frame by effectively confining the core concrete to a three dimensional compression state.The results of the FEM simulation are compared with those of pseudo-dynamic model test with the same parameters,so the relative time history responses for the stories,hysteretic loops and failure modes of the frame under different peak acce leration are obtained,results between numerical computation and test are matched well.The FEM based on OpenSees software can effectively analyze the seismic responses of the high-strength concrete frame structure reinforced with high-strength bars and can additionally study the seismic performance of the kind of structures.