框架连续倒塌非线性有限元实用分析法  

Practical analysis of frame progressive collapse prevention by nonlinear finite element method

作　　者：杨玛莎 

机构地区：[1]厦门合道工程设计集团有限公司,361004

出　　处：《福建建筑》2010年第11期55-58,共4页Fujian Architecture & Construction

基　　金：厦门市科技计划项目(3502Z20074039)

摘　　要：钢筋混凝土框架结构连续倒塌的分析涉及到砼开裂、混凝土和钢筋的材料非线性、结构的几何非线性等因素,目前通用的有限元分析软件尚不能对此进行有效的计算。本文考虑了材料非线性及P-△效应,采用塑性铰假设,设定了倒塌判定条件,用FORTRAN90编写静力非线性有限元分析程序,对钢筋混凝土框架结构进行了倒塌分析。The analysis of reinforced concrete（RC） frame progressive collapse is related to concrete cracking,material nonlinearity of concrete and steel bar,geometric nonlinearity of structure,which still cannot be analyzed effectively by the popular commercial finite element software.A special program of static nonlinear finite element is made to analyze the collapse of RC frame by Fortran 90,which considers both physical and geometric nonlinearities,adopts the assumption of plastic hinge,and establishes the criterion to judge the occurrence of collapse.

关 键 词：框架 抗连续倒塌 静力非线性有限元 材料非线性 几何非线性 

分 类 号：TU311.4[建筑科学—结构工程]