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为了研究框架结构整体刚度对抗连续倒塌的影响,本文提出一种整体等效为局部的分析抗连续倒塌的非线性静力方法,并应用有限元软件Abaqus中梁单元建立一榀框架结构,验证等效方法的可行性;然后去除失效柱,分析侧向刚度和失效柱点上层结构刚度的改变对失效点最大抗力的影响。结果显示随着侧向刚度的改变,最大抗力的差别都在3%以内,而随着上层结构的刚度的改变,最大抗力基本一致,这表明侧向刚度和上层结构刚度对最大抗力的影响很小,可忽略。这为研究抗连续倒塌提供一种简单有效的方法。
In order to study the effect of overall stiffness of frame structure against continuous collapse, this paper presents a non-linear static method that is equivalent to local analysis of continuous collapse, and uses a finite element software Abaqus beam element to establish a frame structure, verification, etc. Then the failure columns were removed. The influence of the lateral stiffness and the stiffness change of the superstructure on the invalid column on the maximum resistance of the failure point was analyzed. The results show that with the change of lateral stiffness, the maximum resistance difference is less than 3%, while the maximum resistance is basically the same as the stiffness of the superstructure changes, indicating that lateral stiffness and superstructure stiffness have a great effect on the maximum resistance Small, can be ignored. This provides a simple and effective method for studying anti-continuous collapse.