框架填充墙对结构抗震性能的影响

Impact of frame infill wall on seismic performance of structure

填充墙对于框架结构的抗震性能有很大的作用。为了探究有无填充墙、填充墙的数量以及填充墙的布置对于结构动力特性的影响,采用等效斜撑建立了基于SAP2000的3个填充墙的等效模型,并对其进行了模态分析、反应谱分析、Pushover分析和非线性时程分析。分析结果表明,填充墙的加入对于结构的周期有明显的折减,对于结构塑性铰的发展有很大的抑制作用,其不规则布置对结构薄弱层有较大的不利影响。

Infill wall has large impact on seismic performance of frame structure. In order to explore the effects of existence,amount and arrangement of the infill wall on the dynamic characteristics of the structure,the equivalent diagonal bracing was used to establish three equivalent models of the infill wall based on SAP2000 and modal analysis,response spectrum analysis,pushover analysis and nonlinear time-history analysis were conducted. Results show that the existence of the infill wall obviously reduces the structural period,and largely restrains the development of plastic hinge and its irregular arrangement has great negative effects on the weak layer of the structure.