框架-剪力墙结构剪力墙中断的可行性模拟分析

通过设置剪力墙高度为模拟变量,运用NosaCAD软件对按照规范配筋的框架-剪力墙结构分别进行了罕遇地震与多遇地震作用下的结构模拟分析。假设罕遇地震下层间位移角的要求,与多遇地震下一致作为剪力墙中断是否可行的判断依据。基于中断剪力墙结构与全高结构的层间位移角对比分析,发现在ELCENTRO波作用下罕遇地震时,剪力墙只做到第五层时结构层间位移角超出依据,当只做到四层时出现多遇与罕遇地震下层间位移角同时超限,验证了假设的合理性,同时表明剪力墙中断的可行性。12层的框架-剪力墙结构可以在顶部适当的楼层对剪力墙进行中断到第6层。

SIMULATION ANALYSIS FOR THE FEASIBILITY OF FRAME-SHEAR WALL STRUCTURES WITH SHEAR WALL INTERRUPTION

By setting the shear wall height as the simulation variable, the NosaCAD program is used to simulate and analyze the performance of frame-shear wall structure with specification reinforcing under rare and frequent earthquakes. It is assumed that the limit of inter-story drift ratio of the interrupted shear wall structure for rare earthquake is same to the frequent earthquake, both of which are used as the judgement for the feasibility of interrupted shear wall. Basing on the comparative analysis of inter-story drift ratio between the shear wall interrupted structure and the full height structure, it is showed that structures have different response under the wave of ELCENTRO. Layers of shear walls less than six floors is out of the limit of the requirement of inter-story drift ratio of structures under rare earthquake, and the inter-story drift ratio is too large to satisfy the limit when the layers of shear walls is less than five floors under the frequent and rare earthquake. Basing on the result of the turn of unsatisfied requirement, it is certified that the assumption is reasonable for distinguishing the interrupted structure whether exceeding the limit of inter-story drift ratio under rare earthquake and the shear wall could be interrupted if there is a necessary. The shear wall of frame-shear wall structure with 12 stories can be interrupted at the height of not less than six floors.