Segmented manufacturing and splicing method for large steel tube truss curved beam with variable cross-sections

Abstract

The invention discloses a segmented manufacturing and splicing method for a large steel tube truss curved beam with variable cross-sections. The method comprises the steps of segmentation of the curved beam, selection of benchmark cross-sections, manufacturing of the benchmark cross-sections, manufacturing of unit trusses and splicing of the unit trusses one by one. Through manufacturing of the benchmark cross-sections, geometrical shapes of all the cross-sections of the special-shaped curved beam with the variable cross-sections are effectively controlled; through manufacturing of the unit trusses, the geometrical shapes and positions of curved beam segments between every two benchmark cross-sections in the space are effectively controlled; consequently, industrialized production of the special-shaped steel structure curved beam with the variable cross-sections is facilitated, the construction cycle is shortened, the percent of contact areas of space positions is increased, the phenomena of accumulation of manufacturing errors and hoisting errors are reduced, and therefore the design accuracy can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of large-scale steel structures, in particular to a method for segmentally manufacturing and assembling large-scale steel pipe truss variable-section curved beams. Background technique [0002] With the rapid development of new technologies, new processes and new materials in the construction industry, modern buildings are changing with each passing day, and landmark buildings emerge in endlessly. The status of steel structures in new building structures is also becoming more and more important. Due to the short construction period and good seismic performance of steel structures , high safety, low construction pollution, and the advantages of factory-like prefabrication can be realized. A large number of steel structure designs are used in existing high-rise buildings, large-scale stadium buildings and urban landmark buildings representing cultural landscapes. It can be inferred that, The vigorous developme...

AI Technical Summary

Problems solved by technology

With the rise of landmark buildings and artistically shaped buildings, the application of large-scale and special-shaped steel structure frames is becoming more and more common. The production and hoisting of large-scale steel pipe trusses in the prior art are basically still processing a single chord in the factory , on-site hoisting and docking, and then fix each chord in space through the web member and the hoisting method, the existing problems are that the construction period of this method is long and the matching of the spatial position is difficult, especially for steel structures with special-shaped variable-section curved beams , it is prone to the accumulation of manufacturing errors and hoisting errors, which makes it difficult to guarantee the design accuracy

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