Performance And Construction Simulation Analysis Of Large Span Tubular Truss Structure

With the development of society,more large-span forms of architecture appeared in people’s practice.The span of buildings is getting larger and larger,and the structural forms are becoming more and more complex.The effects of temperature and earthquakes have become a factor that cannot be ignored in the design of large-span structures.At the same time,under certain conditions,construction factors play a great role in the design of the structure.Therefore,it has great theoretical and practical value to analyze the displacement and stress of long-span structures under temperature and earthquakes to solve the key problems in design and construction:This paper takes Xi’an Inernational Studies University sports hall proj ect as the background,and takes the large-span spatial pipe-truss roof structure as the research object.Using SAP2000 finite element software for simulation analysis.The main research contents and results including following parts:(1)Applying the general finite element analysis software SAP2000 to modeling,and analyze the dynamic characteristics of the structure of the museum.(2)Determining the temperature field of the site where the structure is located,and analyzing the influence of the temperature field in the temperature range of-35 ℃ to+35℃ on the structure of the upper roof.Two types of working conditions involving the temperature stress and the two working conditions without temperature stress were compared and analyzed.The results show that the temperature effect controls the large-span space tubular truss structure;the influence of different spring stiffness of the bearing on the structural temperature effect is analyzed.The results show that the lower the rigidity of the bearing,the smaller the stress of the rod near the bearing.(3)Applying the time-history analysis method to analyze the internal force and displacement of the roof structure under multiple earthquakes,and compare the displacement data and position of the key nodes of the three-layer truss part and the double-layer truss.The results show that the horizontal earthquake The action(Y-direction)controls the structure.(4)The response analysis of the roof structure under two-dimensional and three-dimensional earthquakes is compared with the one-way seismic calculation results.The results show that the results of 3D seismic analysis are more able to reflect the actual stress deformation of the structure,indicating that the structure does not have simplified processing conditions.(5)The construction and installation sequence of the roof structure was studied.According to the three construction schemes,SAP2000 finite element software was used to simulate each construction stage of the structure,and the displacement and stress calculation results of each scheme were compared to determine the construction plan.1 as the best solution.