摘要
针对工程结构中大量存在的具有材料非线性和几何非线性的一般非线性结构问题,建立了在 Lagrange 坐标系中表达的几何方程,根据混凝土的非线性本构关系包括混凝土在二维受力情况下的强度准则和非线性应力应变关系,建立了二维钢筋混凝土一般非线性有限元模型,并编制了分析程序,对钢筋混凝土偏心受压长柱进行分析。结果表明,该模型具有较好的精度,可用于工程结构的实际分析。
General equations for analysis of reinforced concrete structure are derived aimed at magnitude of nonlinear structure problems in engineering materials,with considering of nonlinear behavior of reinforcement and the nonlinearity of geometry.A finite element model and a computer program for R.C.structure analysis are developed.Using the pro- gram,eccentrical loaded R.C.slender columns are analyzed.Analysis results show that the nonlinear FEM model is applicable with sufficient accuracy for practical use.
关键词
钢筋混凝土
非线性
有限元分析
reinforced concrete
nonlinearity
finite element method
slender column
