Analysis on Dynamic Failure Behaviors of Steel Double-Layer Grids Supported by Circumjacent Steel Columns Used in a Sports Center under Disaster Earthquake Waves

Abstract

In this paper, the analysis is carried out under EL-centro wave with SAP2000, and the appraisal results on their anti-failure performances are presented based on the plastic-hinge theory. In the analyses, the geometric and material nonlinear effects are considered simultaneously. The plastic development level of the rods, the deformed shape and the failure type and the ductility are estimated. The results show that the failure model of the structure under the earthquake wave action is the complicated combination of strength failure and elasto-plastic dynamic local buckling in deferent areas of the structure; Its critical failure peak acceleration of EL earthquake wave when applied in X directions is 747gal, which is 1.87 times more than the official seismic fortification level of 8 degree (major earthquake, 0.4g) and can be served as earthquake victim shelter in the area of 8 degree seismic fortification; Its displacement ductility coefficient is12.14,which shows the structure owns good energy dissipation capacity.