Research And Design Of Two Kinds Of Long-span Cantilevered Steel Structures

The cantilever structure has a long history and beautiful shape.The long-span cantilevered structure has strong visual impact and artistic expression.With the rapid development of technology,the scale of cantilevered is increasing and applied more and more in contemporary architecture.The development of long-span spatial structure has led to the development of long-span cantilevered structures.The vertical stiffness of the long-span cantilever structure is irregular,the local torsional effect is obvious,the structure redundancy is low,and the overhanging part of the cantilever is possible,and the structure design is difficult.It is a reasonable choice to steel structure truss and steel structure grid to large-span cantilevered structure.Based on the background of Zunyi planning exhibition hall,the main research contents are as follows:1.The classification,force characteristics,type selection and common calculation methods of truss and grid are introduced.2.Taking the Zunyi planning project as the background,we have designed three schemes of plane cantilever beam structure,cantilever truss and cantilevered grid structure.The finite element software SAP2000 and Midas Gen are used to analyze and compare these types of structures,and their performance and economy are compared,and the conclusion is drawn that the cantilever truss and the cantilever truss are more reasonable.3.through modal analysis and response spectrum analysis of two structural schemes of cantilevered truss and cantilevered grid,the dynamic characteristics of them are compared and analyzed.4.analyze the connection modes of the two structural schemes,and carry out node design and finite element analysis for the key nodes.5.discusses the construction and installation of such large-span cantilevered steel structure.