Construction method of rear welded joints of a truss

Abstract

The invention discloses a construction method of rear welded joints of a truss. The method comprises the following steps that building construction requirements are collected; a truss structure is designed; a structural model of the truss and a substructure and a superstructure which are connected with the truss is built through finite element software; mechanics checking calculation is conducted on the model, a high stress section of the truss is calculated, and local cement pouring reinforcement is conducted; deflection analysis is conducted on the model through the finite element software, after the truss is loaded, downward displacement of lower chord members is calculated, notches are formed in the connection positions of the two ends of the lower chord members which move downwards and uprights, and the notches serve as the rear welded joints; the truss is manufactured, wherein rear welded junctions are formed in the positions, corresponding to the rear welded joints, of the uprights; site construction is conducted. By means of detailed design, the finite element software is utilized to calculate the local cement pouring points and analyze load deflection of the truss, the rear welded joint positions are set, the rear welded junctions are reserved, and the problem that oblique pulling force is produced to the uprights by the chord members due to the fact that the chord members are deformed under stress is effectively solved by conducting repair welding on the rear welded junctions during construction in later stage.

Description

technical field [0001] The invention relates to a construction method of a truss, in particular to a construction method of a post-welded joint of a truss. Background technique [0002] Truss structures were mainly used in wooden bridges and roof trusses in the early days, and the earliest metal truss structures appeared in Britain in 1845. The biggest feature of the truss structure is that when each node is hinged, the rods on the node only bear axial force, not bending moment and shear force. With the development of modern science and technology, the performance of building materials has been greatly improved, and reinforced concrete trusses, steel truss structures and steel-concrete combined trusses have also been applied in engineering practice. [0003] Because steel has the characteristics of high strength, light weight, strong deformation ability, uniform material and good isotropy, it is especially suitable for the construction of long-span and super high-rise build...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem in the above-mentioned prior art that the settlement deformation of the truss after loading produces a relatively large adverse lateral pressure on the column, the present invention provides a construction method for the post-welded joint of the truss of the present invention, which includes the following steps:

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