钢筋混凝土联肢剪力墙的非线性有限元分析

本文推导了一种带转动自由度的四节点狭长矩形墙板单元与一种分层高精度二节点厚梁单元,二者的组合既合理地描述了联肢剪力墙墙体与连梁的连续性,又具有计算精度高,计算量少的特点。为分析钢筋混凝土的非线性,本文采用应变硬化的弹塑性应力应变关系描述受压混凝土及钢筋,用线弹性应力应变关系描述受拉混凝土,混凝土开裂后的非线性现象则以一些经验公式给予反映。算例表明,本文建立的有限元计算模型用于钢筋混凝土联肢剪力墙的加载全过程分析是合理的,并且计算效率高。

NONLINEAR FINITE ELEMENT ANALYSIS OF REINFORCED COUPLED SHEAR WALL

In this paper, a simplified 4-nodes narrow rectangular plane stress element with degrees of freedom of rotation and a high-order 2-nodes layered beam clement are presented. The combination of these two elements may be able to simulate the continuity between the walls and the coupling beams completely. And in the clement formulation, an elastic-plastic constitutive model for concrete is adopted. In the analysis, the post-cracking behaviour is also taken into account. And a test of the model of reinforced concrete coupled shear walls at the University of Canterbury is reviewed. It is found that good agreement between the analytical results and the experimental results.