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.
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