Non-linear Staged Construction Analysis of Steel Structures Based on the Direct Analysis Method
A reliable staged construction analysis is crucial for ensuring the safety and quality of steel installations in large and complex spatial structures.This paper proposes a non-linear staged construction analysis method for steel structures that accounts for initial imperfections of members and installation modules,as well as deformation accumulation,based on the traditional staged construction analysis and the direct analysis of steel structures.Using NIDA software,the method is applied to analyze the staged construction of a large overhanging steel truss structure in Chengdu,for ensuring the feasibility of the construction plan.Meanwhile,the displacements of critical structural locations and member stresses under the three working conditions of non-linear staged construction analysis,one-shot analysis and linear staged construction analysis are compared and analyzed.These results are then compared to the actual measured results from the construction.The results indicate that the displacements of the one-shot analysis and linear staged construction analysis are smaller than the measured results.However,the results of the non-linear staged construction analysis based on the direct analysis method are more consistent with the measured results,which verified the accuracy and applicability of the proposed method.
steel structurestaged construction analysisdirect analysis methodinitial imperfectionnon-linear
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维普
