基于ABAQUS的负载下外包钢筋混凝土加固钢柱非线性有限元分析  

NONLINEAR FINITE ELEMENT ANALYSIS FOR STEEL COLUMN WITH OUT-WRAP REINFORCED CONCRETE UNDER LOADS BASED ON ABAQUS

作　　者：周乐[1] 郑媛[1] 

机构地区：[1]沈阳大学建筑工程学院,沈阳110044

出　　处：《钢结构》2017年第12期17-21,共5页Steel Construction

基　　金：国家自然科学基金项目(51408371)

摘　　要：利用有限元计算分析软件ABAQUS对负载下外包钢筋混凝土加固钢柱进行轴心受压受力情况非线性有限元分析。选取合理的混凝土、钢筋的材料本构关系,通过建立接触关系,确定加载方式以及网格划分,建立不同参数下的有限元模型,在分析计算后,得到加固柱的极限承载力大小,以负载下外包钢筋混凝土轴加固压钢柱静力试验为基础,验证有限元模型的正确性和有效性。同时建立7个不同混凝土强度的加固钢柱模型和3个不同箍筋直径的加固钢柱模型,分析了外包混凝土强度和箍筋直径对加固后钢柱承载力的影响。Using finite element analysis software ABAQUS to analyze the axial compression force stress condition of steel column with out-wrap reinforced concrete under loads. Reasonable constitutive relations between concrete and steel were selected,through the establishment of contact relationship,the loading mode and mesh were determined,and the finite element models with different parameters were bailt,the ultimate bearing capacity of the reinforced concrete column was obtained through the analysis and calculation. Based on the static test of encased reinforced concrete steel column under loads,the correctness and validity of the finite element model were verified. At the same time,seven finite element models of steel reinforced concrete columns with different concrete strength and three finite element models of steel reinforced concrete columns with different stirrup diameter were established,the influence of concrete strength and stirrups diameter reinforced steel concrete column＇s bearing capacity was analyzed.

关 键 词：外包钢筋混凝土 轴压 加固钢柱 有限元分析 参数分析 

分 类 号：TU391[建筑科学—结构工程]