Cold correction method for thin-wall steel member

Abstract

The invention relates to the field of steel structure construction, in particular to a cold correction method for a thin-wall steel member. The cold correction method for the thin-wall steel member ischaracterized by including the steps of manufacturing a supporting tool: the supporting tool comprises an upper cross rod, a lower cross rod, a bottom rod, a jack and a top plate, the upper cross rodand the lower cross rod are both barb-shaped and clamped on the member, and a bottom rod is arranged between the upper cross rod and the lower cross rod; erecting the jack: one end of the jack is temporarily spot-welded on the bottom rod, the jack is prevented from falling off accordingly, the other end of the jack is spot-welded to the steel member to be corrected, the jack is started to enablethe deformation part of the member to be corrected to be slowly changed from the convex side to the concave side, and when the deformation radian exceeds 1 / 2 of the original deformation radian, forceapplication is stopped. According to the cold correction method for the thin-wall steel member, a correction platform is not needed, gas is not needed, electricity is not used, mechanical equipment such as a crane and the like is not needed for assistance, the operation is simple, correction can be carried out by cooperation of two persons, the correction speed is high, and the deformation problemcan be solved in a member yard or an installation site.

Description

technical field [0001] The invention relates to the field of steel structure construction, in particular to a cold correction method for thin-walled steel components. Background technique [0002] In some projects, large-section H-shaped steel with thin webs often uses uncoiled plates (steel plate stress is large), and there is no rib plate at the end of the component (insufficient rigidity). After the component is hot-dip galvanized and heated (stress release), the deformation of the end web is quite serious. , the number of deformed components is also large. Common straightening methods for steel structures are flame straightening and cold straightening. Features such as galvanized components and thin plates are not suitable for flame straightening; use cold straightening, because the deformed part cannot be placed on the platform and there is no point of focus, so it cannot be corrected; or the main weld of the part is cut, and the steel plate is flattened and re Weldin...

AI Technical Summary

Problems solved by technology

Features such as galvanized components and thin plates are not suitable for flame straightening; use cold straightening, because the deformed part cannot be placed on the platform and there is no point of focus, so it cannot be corrected; Welding, reprocessing welds and spraying zinc liquid, the workload is heavy, and the quality cannot be guaranteed

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