RC框架消能减震结构的地震易损性分析
Seismic vulnerability analysis of RC frame energy dissipation and shock absorption structure
李罗堂 1陈道政2
作者信息
- 1. 合肥工业大学 土木与水利工程学院,安徽 合肥 230009
- 2. 合肥工业大学 土木与水利工程学院,安徽 合肥 230009;中国地震局工程力学研究所 地震工程与工程振动重点实验室,黑龙江哈尔滨 150080
- 折叠
摘要
消能减震结构在减震后需要进行减震结构损伤水平的评估以及结构可靠度和地震易损性的研究.文章以钢筋混凝土框架结构为研究对象,以黏滞阻尼器为消能减震装置,采用有限元分析软件ETABS建立消能减震模型并进行传统的小震作用下的弹性时程分析和基于增量动力分析的地震易损性分析,参考结构在不同强度的地震动作用下到达各极限状态的量化指标得到其对应的地震易损性概率,由此确定结构在不同地震动作用下处于各个不同性能水准下的失效概率.结果表明:在设置黏滞阻尼器之后,结构的抗震性能得到有效提升,可以满足"小震不坏,中震可修,大震不倒"的性能指标;同时,基于增量动力分析的地震易损性分析也可以为实际工程的减震设计、灾害评估和未来的地震损失预测提供简明有力的参考依据.
Abstract
The energy dissipation and shock absorption structure needs to be evaluated for the damage level of the shock absorption structure and the structural reliability and seismic vulnerability after shock absorption.In this paper,a reinforced concrete(RC)frame structure is used as the research ob-ject,and the viscous damper is used as the energy dissipation and shock absorption device.The finite element analysis software ETABS is used to establish the energy dissipation and shock absorption model,and the elastic time history analysis under the traditional minor earthquake and the seismic vulnerability analysis based on incremental dynamic analysis are carried out.Referring to the quantita-tive index of the structure reaching each limit state under the action of different intensities of ground motion,the corresponding seismic vulnerability probability of the structure is obtained.Accordingly,the probability of failure at various performance levels under the action of different intensities of ground motion is determined.The results show that after setting the viscous damper,the seismic per-formance of the structure has been effectively improved,which can meet the performance indicators of"no damage under minor earthquakes,no unrepairable damage under moderate earthquakes,and no collapse under major earthquakes".At the same time,the seismic vulnerability analysis based on in-cremental dynamic analysis can also provide a concise and powerful reference for the shock absorption design,disaster assessment and future earthquake loss prediction in actual engineering.
关键词
框架结构/黏滞阻尼器/消能减震结构/增量动力分析/地震易损性Key words
frame structure/viscous damper/energy dissipation and shock absorption structure/incre-mental dynamic analysis/seismic vulnerability引用本文复制引用
基金项目
中国地震局工程力学研究所基本业务费专项资助项目(220EEEVL0417)
出版年
2024
NETL
NSTL
万方数据