钢筋混凝土结构多尺度建模与数值分析

Multi-scale Finite Element Modeling and Numerical Analysis of Reinforced Concrete Structure

采用通用有限元软件ABAQUS实现了精细单元与粗糙单元之间的界面耦合及变形协调,并通过算例验证了结构多尺度有限元分析方法的有效性和精确性。基于多尺度方法,结合纤维模型子程序与混凝土塑性损伤模型,对钢筋混凝土框架结构进行多尺度建模,并进行了弹塑性时程分析及局部构件损伤分析。结果表明:对于大型结构或复杂结构来说,多尺度计算可较好地模拟局部构件的复杂边界条件,为大型工程结构进行多尺度计算提供参考。

To accomplish a reliable interfacial coupling between refined element and coarse element, a method was proposed by using general finite element software ABAQUS. Meanwhile,two simple models were calculated to verify the effectiveness and accuracy of the multi-scale finite element analysis method of the structures. Based on multi-scale method, the elasto-plastic timehistory analysis and local member＇s damage analysis of a reinforced concrete （RC） frame structure were carried out through a fiber model subroutine and concrete plastic damage model. The resultsshow that for the large structures or complicated structures, the problem of complex boundary conditions of local members can be solved efficiently. It can provide reference to the multi-scalecalculation of the large scale engineering structures.