摘要
本文提出了一种用于钢筋混凝土结构空间有限元分析的体梁组合单元模型。该模型将混凝土体元内的钢筋作为能承受轴力、剪力、弯矩和扭矩的梁元,根据钢筋和混凝土在单元内的位移协调条件和虚功原理将两者组合成一个单元。体梁组合单元模型能较全面地反映混凝土内钢筋的力学效应,能适应钢筋的任意布置方式,容许用较大的单元对结构进行离散,解决了大型钢筋混凝土结构有限元分析的单元划分问题。数值算例及其与解析解的比较演示了模型的可行性和精度。
In this paper, a brick-beam combination element model is developed for the three-dimensional finite element analysis of reinforced concrete structures. While the structure is meshed into brick elements, thereinforcing steel bars in a concrete brick element are treated as beam elements that can endure axial force, shear force, bending moment and torsional moment. The beam elements and the brick element are combined together to form a single element according to their consistent displacement conditions and the virtual work principle. The structural performance and arbitrary disposal of the reinforcing steel bars in concrete are consideredcomprehensively. A large-scale RC structure can be meshed and analyzed in bigger brick elements with this model. A numerical example demonstrates the model抯 feasibility and accuracy in comparison with analyticresults.
出处
《工程力学》
EI
CSCD
北大核心
2002年第6期131-135,共5页
Engineering Mechanics
关键词
钢筋混凝土结构
有限元法
体梁组合单元
虚功原理
reinforced concrete structures
finite element method
brick-beam combination element
