框架-摇摆墙结构的刚度比对框架结构抗震性能的影响

Influence on Seismic Performance of Frame Rocking Wall Structure Stiffness Ratio

为研究框架-摇摆墙结构的刚度比对框架结构抗震性能的影响,通过弹塑性有限元软件SNAP建立不同平均层剪切刚度的框架结构,并增设不同刚度比的摇摆墙进行分析比较。结果表明:随着框架-摇摆墙刚度比的增大,结构的层间位移角有不同程度的减小,且层间位移角沿高度方向的分布趋于均匀;原框架结构的平均层剪切刚度越小,框架-摇摆墙刚度比变化的影响越明显;刚度比增大到2.0%时,对结构屈服机制产生影响;框架结构平均层剪切刚度越小,其达到屈服所需的框架-摇摆墙刚度比越大。

In order to study the influence of frame rocking wall structure stiffness ratio on seismic performance,the elastic-plastic finite element software SNAP was used to establish the frame structures with different average shear stiffness,and the analysis and comparison of different stiffness ratio of the rocking walls was included.The results showed that with the increase of the stiffness ratio of frame rocking wall structures,the inter-story drift angle of the structure decreased in different degrees,and the distribution of displacement angle between the layers tended to be uniform along the height direction.The lower the average shear stiffness of the original structure was,the more obvious the change of the influence of the frame rocking wall stiffness ratio would be.When the stiffness ratio increased to 0.2%,it began to influence the structures yield mechanism.The smaller the shear stiffness of the frame structure was,the greater the frame rocking wall rigidity ratio would be required to achieve the yield.