Large span spatial structure CAD assembly analytical method

Abstract

The invention relates to a large span structure CAD assembly analysis method, which is characterized in that an upper large span structure module 1 and a lower concrete structure module 2 form an assembly module 3 to enter into a finite element analysis model. Structure forms of the upper large span structure comprise four span structures, namely grid structure, reticulated shell structure, cable structure and membrane structure. The assembly analysis is making use of finite element analysis software (comprising SAP2000, ETABS, MIDAS, ANSYS, ABQUS) to analyze deformation stress performance of the assembly module formed by the upper and lower structures in the effect of gravity, wind, earthquake and temperature load. The assembly analysis also considers an influence of the lower concrete structure stiffness degradation caused by concrete creep when analyzing, so as to guarantee safety of upper steel structure. The invention has the advantages of safety and reliability, economic and reasonable.

Description

technical field [0001] The invention relates to an analysis technology of a large-span space structure—assembly analysis, which belongs to the technical field of structural engineering. Background technique [0002] In the large-span space structures of different shapes, in stadiums, exhibition centers, theaters, large shopping malls, factory garages and other buildings, such projects with long-span space steel structures on the upper part and reinforced concrete structures on the lower part will be encountered. In fact, the upper long-span space structure and the lower concrete structure are an inseparable whole: the upper structure has both effects and stiffness contributions to the lower structure, and the lower structure supports and amplifies the effect on the upper structure. In the previous calculation method, the upper steel structure and the lower concrete structure were separated and calculated separately. That is, when designing the upper steel structure, the sup...

AI Technical Summary

Problems solved by technology

[0004] (1) Calculation analysis and input and output are extremely cumbersome, especially for large and complex projects, which are difficult to operate and prone to operational errors

[0005] (2) It still fails to reflect the stiffness contribution of the upper steel structure to the lower concrete structure

[0006] (3) The most important thing is that the upper steel structure roof is generally supported at a high position on the top surface of the lower concrete structure columns and beams, and the seismic action on the structural base will have a greater amplification effect when transmitted to the upper steel structure. If the upper steel structure The seismic action of the structure is input at its support, which means that the foundation is raised to the high-level bearing surface of the steel structure, and the seismic action effect will be greatly reduced and distorted, which poses a hidden danger to the seismic safety of the upper steel structure

Images