Analysis on key issues in design of large-span heavy steel structure truss of Nanchang Cultural and Sports Center
Nanchang Cultural and Sports Center project adopts large-span heavy steel structure truss to achieve a maximum column-free space of 99m.In order to elaborate the design idea of large-span heavy steel structure truss,as well as investigate the influence of various factors in design and construction,the key issues were discussed in detail through theoretical analysis and numerical simulation,including layout of truss members,support conditions,structure of key joints,impact of the construction process,etc.The results show that the layout of the web member has little influence on the internal force of the chord member.Treatments of the two supporting ends of the heavy truss is very important.Attention should be paid to ensuring the effective transmission of the axial force of the chord member in ultimate bearing state and weakening the influence of the bending moment.Integral lifting construction scheme has a great influence on the internal force distribution of the structure.The method of ＂post-activation＂ can consider the rotation effect of the end face of the truss during the lifting process,and reflect the influence of the construction process more accurately.
heavy steel structure trusslarge-spancomplex jointconstruction processintegral lifting
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