填充墙随建筑高度变化对结构抗震性能影响研究

Research on the Seismic Performance of Infilled Wall Changed with Building Height

本文以工程实例为基础,分别设计了3层、6层、9层钢框架结构,并采用ETABS建立了有、无填充墙结构的有限元模型。基于地震易损性分析方法对这6个结构分别进行了地震易损性分析,以此来探究填充墙随建筑高度变化对钢框架结构的抗震性能的影响作用结果表明:填充墙提高了结构的极限承载力,降低结构损伤程度;随着楼层数的增加,填充墙对结构抗震性能的改善作用愈加显著。场地特征周期对结构抗震性能影响作用较大,当场地特征周期与结构自振周期较为接近时,结构地震响应更明显,地震作用下损伤状态概率分布范围更广。

In this paper,three-storey,six-storey and nine-storey steel frame structures were designed respectively according to engineering examples,and finite element models with and without infilled walls were established by ETABS.Based on the seismic vulnerability analysis method,seismic vulnerability analysis of these six structures was carried out to explore the influence of infilled walls on seismic performance of steel frame structures with the change of building height.The results showed that the infilled wall improves the ultimate bearing capacity of the structure and reduces the damage degree of the structure:with the increaseing of the number of floors,the improvement of the seismic performance of the structure by the infilled wall is more significant.The site characteristic period has a great influence on the seismic performance of the structure.When the site characteristic period is close to the natural vibration period of the structure,the seismic response of the structure is more obvious,and the probability distribution of damage state under earthquake action is wider.