基于节点性能的屈曲约束支撑混凝土框架抗震性能分析

ASEISMIC PERFORMANCE OF BUCKLING RESTRAINED BRACE CONCRETE FRAME BASED ON THE PERFORMANCE OF THE BRACE JOINT

为分析带支撑梁柱节点对屈曲约束支撑混凝土框架体系抗震性能的影响,建立了考虑节点性能影响的屈曲约束支撑混凝土框架模型。分别采用有限元软件OpenSEES和ABAQUS对框架中普通梁柱节点和带支撑梁柱节点进行模拟分析,证明了建模的合理性。在此基础上,用OpenSEES对三种形式的支撑框架结构的抗震性能进行对比分析,同时采用逐步增量时程分析方法对考虑支撑与梁柱节点的屈曲约束支撑混凝土框架的抗震性能进行全面评估。结果表明:所采用的带支撑梁柱节点具有良好的承载能力,考虑节点性能的支撑框架能够提高模拟精度和真实反映结构的地震反应。

To analyze the influence of the brace beam-column joints on the aseismic behavior of the BRBCF（ buckling restrained brace concrete frame）,the buckling restrained braced concrete frame model considering the influence of joint performance was established. The open source finite element analysis software OpenSEES and ABAQUS were used to simulate and analyze the common beam-column joints and the brace beam-column joints in the frame,which proved the rationality of the models. Based on which,it was made a comparative analysis of aseismic performance of three types of braced frame structures using OpenSEES,and at the same time,the aseismic behavior of the brace beam-column joints in BRBCF was evaluated by the method of incremental time history analysis. The results showed that the brace beam-column joints had a good capacity of the brace framework taking account of the behavior of the joint could improve the simulation precision and reflect more realistically the seismic response of the structure.