Seismic Fragility Analysis of Semi-rigid Steel Frame Considering Panel Zone Performance
The seismic fragility curve of semi-rigid steel frame is obtained by investigating the relationship between the load bearing capacity of panel zone and the seismic vulnerability curve,and the influence of the yield load bearing capacity ratio of panel zone on the semi-rigid steel frame vulnerability is quantified.OpenSEES seismic analysis software is used to establish the semi-rigid steel frame model with the load bearing capacity of panel zone as the main parameter.According to the seismic demand analysis and seismic capacity analysis,the seismic vulnerability curve of the steel frame with yield load bearing capacity ratio(0.5～1.0)in different panel zone is plotted.The fragility curves of the semi-rigid steel frames with a value of 0.7 is smaller than that of the semi-rigid steel frame with other values under the four limit states,and forms an envelope trend.Under the action of horizontal seismic,allowing the yield of the panel zone can significantly reduce the failure probability,and the seismic performance of the structure has also been significantly improved.The improvement effect is most significant when the panel zone yield bearing capacity ratio is 0.7.
panel zoneshear deformation,fragility analysisseismic performanceelasto-plastic dynamic time history analysis
NETL
NSTL
万方数据
