框架结构整体刚度对抗连续倒塌性能影响研究  

The Influence of Integral Rigidity on the Prevention of Progressive Collapse in the Frame Structure

作　　者：宋志丹[1] 曾明会[1] 袁波[1] 

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550003

出　　处：《贵州大学学报（自然科学版）》2015年第5期105-109,共5页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金项目资助(51168010)

摘　　要：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 influence of integral rigidity on the prevention of progressive collapse in the frame structure, a method was proposed that the integral structure can be equivalent to the local structure, and finite el- ement software-abaqus was used to build a frame structure to verify the validation of the method. And then the lo- cal model was used to analyze the effect of lateral stiffness and superstructure stiffness on the maximum resistance after the failure column was removed. The results show that with the change of lateral stiffness, the differences of maximum resistance are less than 3 % and the maximum resistance are basically identical with the change of lat- eral stiffness. This indicates that the lateral stiffness and superstructure stiffness has little influence on the maxi- mum resistance, which can be ignored. This can provide a simple and effective method for the research of pro- gressive collapse resistance.

关 键 词：ABAQUS 最大抗力 最大位移 抗连续性倒塌 

分 类 号：TU312.3[建筑科学—结构工程]