钢筋混凝土筒体的非线性有限元分析模型

Finite element model for nonlinear analysis of reinforced concrete core walls

本文提出了一种反复荷载下混凝土材料的本构模型,该模型采用平面应力状态下的弥散正交裂缝假设,钢筋采用弥散假设,并考虑了屈服、应变硬化、循环卸载与再加载规则等因素。该本构模型与其他模型相比,具有简便有效的优点。在此基础上,本文采用八结点平面应力单元建立了钢筋混凝土核心筒体非线性有限元分析模型,并对试验模型进行了非线性分析,计算结果与试验结果吻合较好。

A nonlinear reinforced concrete finite element analysis model was established using eightjoint planstress elements. A simple and reliable constitutive model of reinforced concrete under cyclic loading and the concept of a smeared crack approach with orthogonal cracks were utilized. The comparison of the experimental and computational results shows that the analysis model is reasonable and can be used for the nonlinear analysis of reinforced concrete core walls. 