Seismic Vulnerability Analysis of Flexural Frame Structures Under Uneven Settlement of Steel Structures
Uneven foundation settlement is one of the common engineering problems in col-lapsible loess areas.In order to study the influence of uneven foundation settlement on the seis-mic performance of steel structures,the incremental dynamic analysis(IDA)method is used to analyze the seismic vulnerability of flexural frame structures in steel structures.The changing re-lationship between the seismic response of the structure and the uneven settlement of the founda-tion is analyzed.On this basis,the failure probability of the structure is analyzed according to different peak acceleration amplitudes.The analysis results show that redistribution of internal force of the structure due to uneven settlement leads to failure of some components in an earth-quake.On the plane corner of the building,due to the nonuniformity of the foundation,the structure will be further damaged in theearthquake.The deflection of the flexural frame structure caused by non-uniform settlement increases.And with the increase of settlement,the seismic damage of the superstructure intensifies.
万方数据
维普
