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中文摘要：
为研究钢筋混凝土框架结构的连续倒塌受力机理,在角柱失效倒塌试验基础上,运用ABAQUS有限元软件对钢筋混凝土框架进行了连续倒塌仿真分析。考虑到角柱失效倒塌过程中地梁和对角区域的构件几乎没有破坏,建模中只在角柱区域建立了钢筋混凝土板;同时考虑到位移加载方式简单而且模型更易收敛,故仿真倒塌全程采用位移控制。通过仿真得到了结构的荷载-位移曲线、框架的位移曲线、钢筋和混凝土应力曲线、破坏形态等,并与试验结果进行对比。结果表明：仿真结果和试验结果基本一致;角柱失效时,框架经历了弹性阶段、塑性铰形成阶段和失效阶段;该仿真能够较好地模拟框架模型连续倒塌的过程,并且能揭示倒塌破坏过程的受力特点。
英文摘要：
In order to study the force mechanism of continuous collapse of reinforced concrete frame structures, finite element software ABAQUS was used to simulate the process of continuous collapse of reinforced concrete frame structures based on prism failure test. In the process of simulation, considering that there was almost no failure in the ground beam and diagonal area when prism was failure, reinforced concrete slab was established only in the prism area in modeling process. At the same time, considering that the displacement loading method was simple and the model was easier to astringe, the displacement control was used to simulation collapse. The force displacement curves of structure, the displacement curves of framework, the curves of steel and concrete stress and failure patterns were got, and the simulated results were compared with the test results. The results show that the simulated results and the test results are in basic agreement. When the prism is failure, the framework experiences the elastic stage, formation stage of plastic hinges and failure stage. The simulation can better simulate the process of continuous collapse of the model, and reveals mechanical characteristics under collapse.
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