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以结构倒塌数值模拟的理论为基础,选择基于显式动力学的有限单元法作为数值计算方法,结合单榀框架倒塌试验及十层框架结构算例,分别建立并设置了线框、整体式和分离式模型,并采用拆除构件法对三个模型进行倒塌数值模拟方法的研究,分别从多个方面对结果进行比较,验证了数值模拟方法的合理性以及三种模型各自的适用性。同时,针对繁复的结构倒塌模拟前处理过程,采用VC++语言开发了可导出ANSYS/LS-DYNA结构倒塌线框模型APDL文本的MFC程序,以期为结构倒塌数值模拟提供便利。
Based on the theory of structural collapse numerical simulation, finite element method based on explicit dynamics is selected as numerical calculation method. Combined with the collapse test of single frame and the example of ten-story frame structure, Separated model and the disassembly method were used to study the numerical simulation of the collapse of the three models. The results were compared respectively from several aspects, which verified the rationality of the numerical simulation method and the applicability of the three models. At the same time, aiming at the complex structure collapse simulation preprocessing process, an MFC program that can derive the APDL text of ANSYS / LS-DYNA structural collapse wireframe model was developed by using VC ++ to facilitate the numerical simulation of structural collapse.