方钢管混凝土偏压柱非线性屈曲承载力的有限元分析  

FINITE ELEMENT ANALYSIS OF NONLINEAR BUCKLING LOAD BEARING CAPACITY OF CONCRETE - FILLED SQUARE STEEL TUBULAR COLUMN UNDER ECCENTRIC LOAD

作　　者：程晓东[1] 叶贵如[1] 程莉莎[1] 徐兴[1] 

机构地区：[1]浙江大学

出　　处：《土木工程学报》2003年第12期31-38,共8页China Civil Engineering Journal

摘　　要：在方钢管混凝土偏压柱试验研究的基础上,提出核心混凝土的三维应力-应变关系模型,构造了非线性三维虚拟层合单元,并且利用此法对方钢管混凝土偏压柱的非线性屈曲承载力进行了有限元分析,计算结果与试验结果符合良好。On the basis of the experimental research on the concrete - filled square steel tubular column under eccentric load, which the three - dimensional stress - strain relationhip model of core concrete is put forward, and the three - dimensional virtual laminated element has been established. By the method, the nonlinear buckling load bearing capacity of concrete - filled square steel tubular column under eccentric load is analyzed by the finite element method. The calculated results conformed well to the tested results.

关 键 词：非线性的三维虚拟层合单元法 非线性屈曲承载力 方钢管混凝土偏压柱 

分 类 号：TU398[建筑科学—结构工程]