矩形钢管混凝土柱力学性能非线性有限元分析  

Nonlinear finite element analysis on mechanical behavior of concrete-filled rectangular steel tubular column

作　　者：卢明奇[1] 杨庆山[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《沈阳工业大学学报》2012年第2期224-230,共7页Journal of Shenyang University of Technology

基　　金：国家自然科学基金青年科学基金资助项目(51008013);中央高校基本科研业务费专项基金资助项目(2009JBM060)

摘　　要：为了更好地研究矩形钢管混凝土柱的力学性能,在以往试验和理论研究的基础上,提出一种适用于任意截面形状的三节点八自由度单元模型.结合混凝土和钢材的本构关系建立了非线性有限元模型,用于对单调和反复加载受力方案进行计算分析.对包括纯弯、轴压、偏压和低周反复荷载等多种受力模式下的矩形钢管混凝土试件进行计算,并与试验结果进行比较,两者较为吻合,证明所提出的非线性有限元分析方法可以较好地模拟矩形钢管混凝土的受力和变形性能.In order to study the mechanical behavior of concrete-filled rectangular steel tubular columns, an unit mode with eight degrees of freedom （DOF） and three nodes, applicable to any kind of sectional shape, was proposed based on the past experimental and theoritical researches. In combination with the constitutive relation between concrete and steel, a nonlinear finite element model was established, and was used for the calculation analysis on force schemes with monotonic and repeated loading. The concrete-filled rectangular steel tubular specimens under various force modes such as pure bending, concentric compression, eccentric compression and low-cycle repeated loads were calculated. It is found through comparison that the calculated results are consistent with the experimental ones. It proves that the proposed nonlinear finite analysis method can better simulate the force and deformation behaviors of concrete-filled rectangular steel tubular.

关 键 词：矩形钢管混凝土 非线性分析 自由度 本构关系 有限元 截面 广义应力 广义应变 

分 类 号：TU375.3[建筑科学—结构工程]