The Study Of The Structural Selection Of Large-span Multi-function Hall Based On The Economic Performance

With the deepening of reform and the rapid development of economy, people getshigher requirements on the plane size of architecture in the production and life.Large-span prestressed concrete floor structure came into being, the advantage ofstrong leap ability and comprehensive economic performance make it get a wide rangeof applications. Whether the selection of large-span floor structure is reasonabledirectly affect the mechanical performance and the cost, and even affect the normal useand safety of the structure. Therefore, the study on the optimization of large-spanprestressed concrete floor structure system has important practical significance. Thelarge-span prestressed concrete floor of a large-span multi-function hall was taken asthe prototype and expended and the finite element model of the large-span floorstructure was built. Conclusions are follows:Firstly, according to the architectural form of the overall structure, adopts threedifferent structural schemes and six different layout style, their names are main andjunior beam scheme, junior beam scheme and cross beam scheme The finite elementmodels of the different schemes were established by using PM, PREC, SATWE. Onthe basis of integrated comparison of different structural schemes on mechanicalperformance, deformation characteristic, thick of structure, material volume and cost,the conclusion is reached that for the structure of such floor the main beam laterallylayout in the main and junior beam scheme.Secondly, the finite element models of the structure was established by a largefinite element program SAP2000. The load consists of dead load, live load, earthquakeload and wind load. the statical and dynamic characteristics of the structure was obtained through the analysis and calculation of the structure on the different loadconditions.Finally, According to the usage of the building, three possible working conditionswere drawn up. On the basis of the analysis and calculation of the structure’s dynamicresponse on the different working conditions and then evaluate the comfort of the floor.The reseach work has important reference value to the further research on the selectionof floor structure system.