摘要
为研究全钢管混凝土住宅框架结构的性能,通过OpenSees平台建立了16层全钢管混凝土框架的有限元模型,基于增量动力分析的方法对结构进行不同强度地震作用下的动力时程分析,定义了不同破坏状态下的结构性能水准,根据概率需求分析模型得到地震易损性曲线,并结合易损性指数定量的评价结构震后破坏程度。结果表明:随着PGA的增大,易损性曲线趋向平缓,说明该类结构具有较好的延性和抗倒塌能力。通过易损性指数评估发现,结构在小震及中震作用下分别处于基本完好与轻微破坏的状态,在大震作用下不易发生严重破坏。研究结果可为全钢管混凝土纯框架结构的设计应用及抗震性能评估作参考。
In order to study the seismic performance of the concrete filled steel tube frame structure applied to residential system,the finite element model of a concrete filled steel tube frame with 16 stories was established by OpenSees.Based on the incremental dynamic analysis method,the dynamic time history analysis of the structure under different strength earthquake was carried out.and the structural performance level under different failure state was defined.Then the seismic vulnerability curve was obtained according to the probability demand analysis model.Finally,the damage degree of the structure after earthquake was evaluated quantitatively combining with the vulnerability index.The results show that the vulnerability curve tends to be gentle with the increase of PGA,which shows that concrete filled steel tubular structure has better ductility and anti-collapse capabilities.Through the vulnerability index,the structure is basically in good condition and slightly damaged.under the action of small earthquake and medium earthquake.Besides,the structure will not easily be seriously damaged under the large earthquake.evaluation.The research can be used as a reference for the design application and seismic performance evaluation of concrete filled steel tubular pure frame.
作者
孙晓静
杨锋
张海涛
SUN Xiaojing;YANG Feng;ZHANG Haitao(Department of Civil Engineering,Shanghai University,Shanghai 201900,China)
出处
《结构工程师》
2021年第1期75-81,共7页
Structural Engineers
基金
上海市科学技术委员会技术标准专项基金(13DZ0501700)。
