Finite Element Of Optimal Design Of Temporary Support Base Numerical Analysis

With China is entering into the stage of building a well-off society in an all-round way,large-span steel structures characterized by new types,environmental protection and energy saving have become the new darling of the construction industry.They have been widely used due to their beautiful appearance and good performance.In a large span structure.At present,the research on the mechanical properties of the temporary support base in large-span steel structures is obvious at home and abroad,which results in the construction of the project can rely on the experience of construction,lower reliability,more waste of resources,not in line with the current steel structure construction for quantitative,refinement and security requirements.Therefore,in order to ensure the normal use of the structure in the construction process and optimize the construction technology in order to save the project expenses,this paper mainly studies the following aspects.Based on the temporary support system of the first building of Nan yang No.3 Hall,the ABAQUS finite element numerical simulation study is performed on the temporary support frame,steel pad,and reinforced concrete floor to make sure that the steel pad and the steel pad are not installed under the temporary support frame.Under these conditions,clear the bearing capacity and deformation of reinforced concrete slabs.Through the control variable method,the influence of the parameters such as the thickness of the steel plate,the size of the steel plate,the concrete strength grade,the boundary condition of the floor,etc.On the bending moment and deformation of the slab is analyzed and the corresponding change curve is plotted.The results of the study indicate that the thickening of the steel plates,the increase of the size,the improvement of the concrete grade and the change of the boundary conditions all can improve the stress performance of the support system,reduce the internal forces and deformation of the floor slabs.Considering the engineering design needs,this paper has studied the equivalent analysis method of uniform load for effect of concentrated load under temporary supporton the reinforced concrete floor to meet the requirements of uniform load under the construction process design.The force performance theory of the board carries out relevant analysis to meet the needs of engineering design.The results show that with the thickness of the steel plate increase,the equivalent load decrease in turn.Optimized design for the practice of laying crossed H-shaped steels under central temporary support in large-span steel structures,combined with the practice and problems of cross-hedged H-beams under the temporary support of the Central Rail Transit Control Center in downtown Tianjin.The MIDAS software is used to simulate the construction of the support system.The energy method is used to optimize the construction method for the traditional laying of H-shaped steel.The optimum section of the support is established to suit this project.The analysis results show that the optimization method is used to support the support frame.The stability of the premise can effectively reduce the internal force of the reinforced concrete floor and save 55.5% steel.Better optimization has a strong guiding significance for practical projects.