杆系结构的高精度非线性分析  

The high precision non-linear analysis for frame structures

作　　者：刘磊[1] 张光卿 袁长卿 

机构地区：[1]北京交通大学,北京100044 [2]中信国际合作公司,北京100004 [3]河北铁建勘测设计院,河北石家庄050051

出　　处：《土木工程学报》2006年第1期25-28,49,共5页China Civil Engineering Journal

基　　金：国家自然科学基金(50178004)

摘　　要：在严格的材料、几何非线性分析的基础上,建立一套完整的对钢筋混凝土杆系结构进行高精度分析的非线性有限元法。该方法充分考虑材料非线性的作用,分别建立了面内分层法和面外分块法的计算模型。算例分析表明:与几何非线性相比,材料非线性对钢筋混凝土杆系结构的非线性分析起着更为关键的作用。只考虑几何非线性或对材料非线性做粗略处理会导致计算结果精度不够。Based on both the material and geometric non-linearities, a nonlinear finite element method for complete and more precise analysis of frame structures is developed. In the method, the influence of material non-linearity is considered. In addition, two analysis models are proposed, namely, one is a layered model for in-plane analysis, the other is an element model for out-plane analysis. Numerical examples show that in the non-linear analysis of reinforced concrete structures, material non-linearity plays a more important role than geometric non-linearity. The analysis will no longer be sufficiently reliable if one is to consider geometric non-linearity only or to handle material non-linearity in a crude form.

关 键 词：高精度 非线性分析 有限元法 

分 类 号：TU320.1[建筑科学—结构工程]