剪力墙受力性能的宏模型静力弹塑性分析  

STATIC ELASTIC-PLASTIC ANALYSIS OF SHEAR WALLS WITH MACRO-MODEL

作　　者：陈勤[1] 钱稼茹[1] 李耕勤[2] 

机构地区：[1]清华大学 [2]昆明理工大学

出　　处：《土木工程学报》2004年第3期35-43,共9页China Civil Engineering Journal

基　　金：国家自然科学基金资助重大项目 ( 5989541 0 )

摘　　要：建立了以弯曲变形为主的钢筋混凝土剪力墙的静力弹塑性分析宏模型 ,宏模型由钢筋混凝土膜单元和钢筋混凝土柱单元组成 ,分别模拟剪力墙的墙板和边缘构件。宏模型以有限元为基础 ,但自由度比有限元模型少得多。用宏模型编制了剪力墙静力弹塑性全过程分析程序 ,采用单自由度补偿法求解病态方程组 ,得到有下降段的能力曲线 ,可以预估剪力墙的变形能力和位移延性。 9片剪力墙试件的计算结果和试验结果的对比说明了宏模型的有效性。通过计算分析 ,研究了轴压比。A macro-model of static elastic-plastic analysis was developed for reinforce d concrete (RC) shear walls with flexure deformation mainly. The model was composed of RC column element and RC membrane element to simulate the wall pane l and the boundary zone respectively. The model was based on the finite element but with much less degrees of freedom. A method called single degree of freedo m compensation was adopted to solve the ill-conditioned equations in the full r ange static elastic-plastic analysis program of shear walls. A complete capaci ty curve with descending branch could be obtained and the ductility capacity of the wall could be predicted. The newly developed macro-model was verified by t he experimental and analytical results of nine RC shear wall specimens. The infl uence of the axial load ratio, the confinement degree of boundary zone and the a spect ratio on the seismic behavior of shear wall was studied by the full range static elastic-plastic analysis with the developed program.

关 键 词：钢筋混凝土剪力墙 宏模型 静力弹塑性分析 约束边缘构件 受力性能 

分 类 号：TU398.2[建筑科学—结构工程]