双肢剪力墙材料非线性差分方程分析方法

On Difference-Equation Analysis of R.C.Coupled Shearwall with Material Non-Linearity Considered

分析了双肢剪力墙在地震载荷作用下弹塑性各个阶段的变形和受力特点,提出了双肢剪力墙材料非线性的差分方程分析方法,使用该方法对双肢剪力墙进行了计算,计算结果与试验结果吻合较好.

In 1991 Subedi gave a method for determining the ultimate strength of R.C.coupled shearwall[7,8]. In the authors' opinion,there are two shortcomings in his analysis that may cause inconvenience to the de- signer.These two shortcomings are:(1)The elasto-plastic response needed by the designer can not be computed;(2)Subedi's method can not predict which span of coupling beams cracks first;nor can it pre- dict which span yields first. These two shortcomings are believed to be overcome by the method presented in this paper.A new approach is adopted in this paper.It is believed that the authors make ingenious use of moment-curvature constitutive relationships of coupling beam and wall,and equivalent stiffness to establish elasto-plastic difference equation(eq.7 in the full paper);eq.(7) is believed to be new.The authors' method is used to an- alyze the test data of two coupled shearwalls.Computed results agree well with test data;In the case of ul- timate strength,the deviation from test result is only about 10%.