【摘要】 基于有限元软件ABAQUS用户材料模型子程序二次开发技术,建立了钢管混凝土组合框架体系的数值模拟模型,该模型得到了以往研究者完成的钢管混凝土构件及组合框架结构低周往复荷载试验结果的验证。分别基于非线性纤维梁单元及分层壳单元模拟梁柱构件及楼板,用增量动力分析(IDA)方法对某9层钢管混凝土空间框架结构的抗震性能进行了研究,对某一地震动下结构由弹性阶段到屈服再到塑性阶段过程中的性能点、层间位移角、结构顶层谱加速度时程响应、框架塑性铰出铰顺序及基底剪力时程曲线进行了判定,为进一步评估钢管混凝土空间框架结构的抗震性能提供参考。更多还原

【Abstract】 A secondary development technology based on ABAQUS to achieve the new user materials model using the user subroutine and numerical simulation model of composite frame system with CFST columns are presented. The numerical results are in good agreement with the cyclic experimental results on the CFST members and composite frames. The incremental dynamic analysis( IDA)method is adopted to investigate the seismic performance of a 9-story space frame with CFST columns. The columns and beams are simulated by nonlinear fiber beam element,and the slabs are simulated by layered shell element. The performance points,inter-story drifts,acceleration spectrum time history curve of the top structure,the plastic hinges sequences and the base shear time history curve of the structure are determined in the whole process from elastic stage to yield stage and then to collapse under a certain earthquake motion. The proposed approach in this paper provides reference to evaluate the seismic behavior of space composite frames with CFST columns effectively and accurately.更多还原