含现浇混凝土填充外墙剪力墙结构抗震性能计算分析

Calculation analysis of seismic behavior of shear wall structure with cast-in-situ concrete exterior infilled walls

为研究剪力墙结构中现浇混凝土填充外墙对主体结构抗震性能的影响及为结构设计提供依据,选取了4个典型工程作为案例,对整体结构模型进行了弹性分析和弹塑性分析。结果表明:弹性分析时,填充墙对主体结构刚度贡献显著,导致结构周期减小,层间位移角减小,层剪力增大;弹塑性分析时,当结构布置较复杂、结构高度较高时,填充墙对层间位移角可能产生不利影响;罕遇地震下填充墙与主体结构连接处发生严重损伤,其中窗下墙、窗侧墙、窗间墙对结构构件的不利影响相对较小,结构洞墙部位的剪力墙墙肢发生严重损伤,不利于结构抗倒塌。此外,基于分析结果对填充墙的布置及含填充墙结构的设计计算提出了建议。

To study the effects of cast-in-situ concrete infilled exterior walls on the seismic behavior of main structure in shear wall structure and provide evidence for structural design, four typical projects were chosen as cases, elastic analysis and elastic-plastic analysis were completed for their whole structural models. It is indicated that infilled walls make a great contribution for structural stiffness, thus structural period is shorten, story drift decreases and story force increases for the elastic analysis. For the elastic-plastic analysis of more complicated and higher structures, compared with the model without infilled walls, infilled walls would be an unfavorable factor for the result of story drift. Under rare earthquake action, the connection positions between infilled wall and main structure have severe damages, the adverse impacts of infilled walls around window opening on structural members are comparatively small, but shear walls around virtual openings for structural design are damaged seriously which has an adverse effect on the anti-collapse capacity of structure. In addition, suggestions about the layout of infilled walls and design calculation methods of structure with infilled walls are proposed based on the results of structural calculation analysis.