Steel truss construction method and temporary reinforcing device used in hoisting process of same

Abstract

The invention relates to a steel truss construction method and a temporary reinforcing device used in a hoisting process of the same, wherein the temporary reinforcing device is additionally arranged on a steel truss before the steel truss is hoisted, and the temporary reinforcing device is dismounted after the steel truss is mounted in place. The temporary reinforcing device comprises two support columns which are arranged crosswise, wherein when the temporary reinforcing device is arranged on the steel truss, the temporary reinforcing device is arranged between an upper chord and a lower chord as well as between two adjacent straight web members; the two ends of the two support columns are detachably and fixedly connected onto the upper chord and the lower chord respectively; and the connection positions of one support column wtih the upper and lower chords are near the connection positions of a corresponding diagonal member with the upper and lower chords. According to the steel truss construction method and the temporary reinforcing device provided by the invention, before the steel truss is hoisted, the diagonal member is temporarily fixed by the temporary reinforcing device, so that the stress system of the whole member is not changed abnormally, therefore the integral stability and installation quality precision of the structure are ensured before the diagonal member is tensioned completely, besides, the safety in the steel truss hoisting process is improved, the construction cost is saved and the construction period is shortened.

Description

technical field [0001] The invention belongs to the technical field of steel structures, and in particular relates to a construction method of a steel truss and a temporary reinforcement device used during hoisting thereof. Background technique [0002] A steel truss generally has an upper chord and a lower chord, and a number of straight-web members are arranged in parallel between the upper and lower chords, and diagonally-stayed rods are arranged between two adjacent straight-web members. The two ends of the diagonal stay are respectively connected to the upper and lower chords, and one end is connected near the connection between the upper chord and one of the straight-web rods, and the other end is connected near the connection between the lower chord and the other straight-web rod. [0003] During the construction of the steel truss, firstly, the upper chord, the lower chord, the straight web rod and the diagonal stay rod are assembled and fixedly connected on the grou...

AI Technical Summary

Problems solved by technology

For large-span steel trusses, during the hoisting process, due to the large span of the steel trusses (usually up to about 49m), the stability and stiffness of the diagonal stays are poor, and the stress at the lifting point of the crawler hook hoisting steel trusses Concentration, it is easy to bend or twist the diagonal stay rod under pressure

[0004] In some structural systems, for example, the steel roof is a saddle-shaped car auxiliary space special-shaped structure, and the steel trusses belong to different spatial positions. The stress system is a non-planar space dislocation and divergence system, and the stress structure is extremely complex.

The local stress changes caused by the tension of the diagonal stay rods of the steel truss after they are installed in place will cause the stress redistribution of the entire structural system. Therefore, the deformation of the diagonal stay rods will have a great negative impact on the overall stability and installation accuracy of the structure.

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