Use Finite Element Method For Analyzing The Interaction Of Baotou New Stadium Canopy And Substructure

With the big success of the Beijing Olympic Games，more and more stadiumshave been built. The structures of these stadiums are mostly complex with large spanand various shapes and the design concept are materially different from the traditionalhigh-rise building structure. It is challenges to the designers and constructors, facing ofthese complex structures, which results the current research for the stadiums more andmore. Their structures are large span space structure commonly, so they often use steelstructure for its roof. The stress-strain status of the structure is very complicated. Windloads and temperature loads have a greater impact on the internal forces anddisplacements of the structure. This effect related to the security issues of theconstruction and the entire using process. Therefore, whether it is on the constructionprocess or after the completion, the mechanical analysis for the complex structure isvery important.The Baotou new stadium is a large span space structure which has the complexloading; its upper canopies are steel structures and the lower part of the stands are thereinforced concrete structures; the interaction of canopy and substructure is one of themost important factors that affect the overall security of the structure. This structuralsystem of the stadiums is complex and large span, and the temperature deformation andtemperature stress of the structure are very large. The temperature changes have a greatimpact on the stress-strain of the structure. The summer high-temperature affect makesthe columns supporting the stadium canopy produce cracked, which have definiteimpact on the overall security of the structure.In this article, based on this specific project example, the influence of temperaturefor the stadium deformation with finite element method is analyzed. First of all, thetheory of the stadium mechanical calculations, the concept of temperature load,temperature stress and its calculation method is introduced. Secondly, the finite elementmodel with the SAP2000is established and then the mechanical analysis is proceeded.Finally, the affection caused by temperature is analyzed by means of SAP2000in thetext. The displacement calculated by the SAP2000and the displacement of the actualobservations are compared, and then the impacts of the temperature deformation on thestadium canopy support columns are analyzed.On the basis of the above temperature analysis, this topic conducts mechanical analysis on the column supporting the stadium canopy. This project uses two methodswhich are theoretical formula and the corresponding calculation procedure worked outby the Fortran90language to analyze the force of the steel reinforced concrete columns,and then according to calculation results of the procedure, the figures about the limitloadN P MPcurves are drawed, simultaneously the value of internal force calculatedby SAP2000are put into the limit load curve，so that we can find the value of internalforce which can make the section damage and the corresponding load combination.From the figures, the dangerous column can be found out and a solution can beproposed.According to the analysis and calculation, we can see that temperature load playsan important proportion in the interaction of upper canopy and lower structure and thecolumn supporting the stadium canopy is dangerous under certain conditions, especiallyin the common effect of the temperature load and wind load.