摘要
本文提出基于纤维单元的组合梁柱单元，采用１单元／构件的单元划分方式，可以方便地考虑构件在加载过程中的中和轴移动和大轴力作用下的Ｐ－δ效应，能反映构件沿长度方向的分布塑性及混凝土的开裂等非线性因素。采用高斯积分，利用最小残余位移法进行迭代计算。从文中给出的两个算例结果看，该单元具有足够的精度，可方便地应用于大型结构的非线性分析，适应了结构现代分析的需求。
In this paper, a COMP element for beam-columns is presented. The finite element considers the spread of plastification within the cross section and along the member length, the shifting of centroidal axis, cracks in the concrete, and P-δ effect. It is convenient to perform nonlinear analysis of composite frames using 1 element per member. Gauss quadrature and minimum residual displacement method (with iteration) are used in the analysis. Numerical results show that the proposed technique is efficient and accurate and applicable to the analysis of large- scale structures.
出处
《工程力学》
EI
CSCD
北大核心
2001年第4期67-72,共6页
Engineering Mechanics
