Application of Push-over Analysis in the Design of Large Span Steel Structure

In this paper a spatial finite element model of Anhui university gymnasium suspen-dome roof steel structure is established using a general program of SAP2000.According to the basic theory of push-over analysis,the elastoplastic ultimate load-bearing capacities of the roof steel structure in two worst combinations for action effects are calculated in detail.The computational results indicate that by applying the push-over analysis method,the structural feeble parts which plastic hinges appear can be found and the structural nonlinear load-displacement curves can be gained.Under the worst combination for action effects,it can be caculated that the elastoplastic load bearing safty factors of the roof steel structure equal 2.33 and the structure is safe enough.The research in this paper can be a reference for the similar projects.