任意截面钢筋混凝土长柱在双向弯曲及轴向作用下的承载力分析  

STRENGTH ANALYSIS OF REINFORCED CONCRETE COLUMNS WITH ARBITRARY CROSS SECTION UNDER BIECCENTRIC LOADING

作　　者：刁波[1] 叶英华[1] 

机构地区：[1]北京航空航天大学土木工程系,北京100083

出　　处：《工业建筑》2001年第5期32-34,共3页Industrial Construction

基　　金：国家自然科学基金资助项目 !(批准号 :5 99780 0 4)

摘　　要：提出任意截面钢筋混凝土长柱在双向弯曲及轴向作用下承载力分析模型 ,同时考虑了材料非线性和几何非线性对柱承载力的影响。混凝土和钢筋的本构关系用三次多项式模拟。所推导的单元刚度是材料非线性刚度、几何刚度以及位移 -内力相互作用矩阵的简单迭加。所建立的标准有限元模型很容易与其它有限元模型兼容。理论分析结果与实验结果吻合较好。A numerical method to analyze the failure load of reinforced concrete columns under bieccentric loading is presented. Both material nonlinearity and geometric nonlinearity are taken into account simultaneously. The constitutive laws of concrete and steel bar are simulated by cubic polynomial. The derived element stiffness are a simple addition of the material nonlinear stiffness, geometric stiffness and interaction component matrix. The standard elemental model derived here is compatible with other finite element models. The theoretical results agree well with the experimental data.

关 键 词：钢筋混凝土 任意截面柱 极限荷载 非线性 承载力 

分 类 号：TU375.3[建筑科学—结构工程]