粘滞阻尼器耗能减震结构的地震易损性分析

Analysis of seismic vulnerability of viscous dampers with energy dissipation

评价结构采用消能减震技术后的损伤破坏水平,需要对减震结构进行地震易损性和可靠性研究。本文以钢筋混凝土框架结构为研究对象,粘滞阻尼器为减震装置,采用ETABS有限元软件对结构进行传统时程分析,确定消能减震分析模型;基于增量动力分析(IDA)的基础上,对消能减震结构应用Perform-3D进行了地震易损性分析,依据指定不同强度地震作用下各极限状态的结构地震易损性概率,评定减震结构在地震作用下的破坏程度。结果表明,设置粘滞阻尼器后可有效地提高结构的抗震性能,能够满足抗规“小震不坏,中震可修,大震不倒”的抗震要求。基于增量动力分析方法的结构易损性分析也可以为实际工程结构的地震破坏和损失评估提供有力的科学依据。

Aimed at evaluating the damage level of the structure after adopting energy dissipation and shock absorption technology,this paper studies the energy dissipation and reliability of the structure.With reinforced concrete frame structure as the research object,viscous dampers for a shock-absorbing device,using ETABS program structure of the traditional software of finite element analysis,to determine the energy dissipation damping analysis model.Based on incremental dynamic analysis(IDA),seismic volatile analysis is performed on the application of Perform-3D in the energy shock absorption structure.According to the probability of structural energy dissipation in each limit state under different intensity earthquakes,the degree of damage under earthquake structure is evaluated.The results show that the seismic performance of the structure can be effectively improved after setting the viscous damper,and can meet the seismic requirements of the flavor“not bad in small earthquake,repairable in medium earthquake,not collapse in large earthquake”.Structural vulnerability analysis based on incremental dynamic analysis can also provide a strong scientific basis for seismic damage and loss assessment of actual engineering structures.