钢筋混凝土短肢剪力墙结构非线性分析研究

针对两类混凝土短肢剪力墙结构形式,分别进行了4片相同的4层1∶3缩尺模型的短肢剪力墙结构非线性全过程试验研究。采用基于损伤能释放率的混凝土弹塑性损伤本构模型,针对两种类型的短肢剪力墙结构,进行了较为全面的非线性分析,给出了典型时刻整体结构的应力和损伤分布与演化过程。分析发现:随着结构逐渐进入非线性,刚度不断劣化,损伤程度不断增大,导致结构各个不同层次上的反应均出现了重分布现象。将分析结果与试验结果进行了对比,发现混凝土材料随机性导致结构反应具有显著变异性,模型的非线性分析结果仅能在均值意义上描述结构非线性行为。

Nonlinear analysis of RC short-leg shear walls

Two types of short-leg shear walls were introduced through static tests on the same type of four four-story 1∶3 scaled shortleg shear wall specimens respectively.According to damage energy release ratebased elastoplastic damage constitutive model for concrete,nonlinear behavior of short-leg shear walls were investigated,moreover the structural stress and damage distribution and evolution process were discussed in detail.Results show that the stiffness deterioration and structure damage become notable with nonlinear development,which results in redistribution of responses at different hierarchy.By means of comparing the analytical to experimental results,it can be concluded that randomness from concrete materials causes variability of structural responses and the nonlinear analytical results may describe structural nonlinear behavior in mean responses.