钢管混凝土框架力学性能的简化二阶弹塑性分析  

Simplified second-order elastic-plastic analyses on mechanics behavior of concrete filled steel tubular frame

作　　者：王文达[1,2] 韩林海[1] 

机构地区：[1]清华大学土木工程系,北京100084 [2]兰州理工大学土木工程学院,兰州730050

出　　处：《清华大学学报（自然科学版）》2009年第9期1455-1458,共4页Journal of Tsinghua University(Science and Technology)

基　　金：高等学校博士学科点专项科研基金项目(20070003087);中国博士后科学基金资助项目(20080430404)

摘　　要：为快速得到钢管混凝土柱-钢梁框架的荷载-位移曲线,提出了一种简化二阶弹塑性分析方法。通过建立基于塑性铰理论的梁柱单元方程,采用变刚度法进行了钢管混凝土框架的二阶弹塑性分析。简化计算结果与有关试验结果及非线性有限元计算结果总体上吻合较好,在此基础上,给出了单层钢管混凝土框架的荷载-位移曲线的实用计算方法。A simplified second-order elastic-plastic analyses method was developed to quickly determine the load-displacement curve for composite frames composed of concrete filled steel tubular （CFST） columns and steel beams. The beam column element equations are based on plastic hinge theory and a variational stiffness model. The load-deformation curves of a CFST frame were then obtained by using the second-order elastic-plastic analysis method conveniently and quickly. The results agree well with experimental and FEM results. On the base of this, the practice load versus displacement curve model of CFST frames was proposed.

关 键 词：钢管混凝土柱 钢梁 框架 二阶弹塑性分析 实用方法 

分 类 号：TU398[建筑科学—结构工程]