少剪力墙框架结构在多遇地震下的抗震性能计算分析

纯框架结构的整体侧向刚度较小,在强烈地震作用下侧向变形大,易造成结构整体倒塌破坏。从增加结构整体冗余度的角度出发,考虑添加少量钢筋混凝土剪力墙来提高框架结构的整体抗倒塌能力。并对添加少量剪力墙的各种布置方式及数量进行分析比较,得出可行的平面布置形式及其对框架结构变形形态的影响。分析增设少量剪力墙在多遇地震作用下对框架结构弹性层间位移角的改善情况,在此基础上,进一步得出承担不同倾覆力矩比例的墙体与弹性层间位移角的对应关系。

Calculation and analysis of seismic behavior of frame structure with few shear walls under multiple earthquake

The overall lateral stiffness of pure frame structure is relatively small,so the lateral deformation is large under the strong earthquake and this could easily lead to overall collapse.For enhancing the redundancy of the overall structure,a few of reinforced concrete shear walls were arranged to improve the whole resisting collapse capability of frame structure.Various kinds of shear walls disposal modes and amounts were analyzed.The feasible disposal modes and the influence of different amounts and modes of walls on the deformed shape of frame structure were obtained.The improving of elastic inter-story drift angle of frame structure under multiple earthquake through adding few shear walls was verified.Moreover,the corresponding relation between walls which bear different capsizing moment ratio and elastic inter-story drift angle was analyzed.