Anti-fatigue orthotropic plate structure and producing process

Abstract

The invention discloses an anti-fatigue orthotropic plate structure and a manufacturing process. Design and manufacturing processes of a traditional orthotropic plate are changed and optimized. The process comprises the following steps that 1, a transverse partition plate with a certain height is welded when a panel and a longitudinal stiffening rib are welded to form an orthotropic plate, and overall rigidity of the plate is improved; 2, the longitudinal stiffening rib adopts a variable cross-section structure with a thickened end portion to increase welding strength with a bridge deck slab;3, a rib inner transverse partition plate is additionally arranged in the position, corresponding to the transverse partition plate, of the longitudinal stiffening rib, so that anti-torsion performance of the longitudinal stiffening rib is increased, and welding seam cracking of arc-shaped notches of the longitudinal stiffening rib and the transverse partition plate is eliminated; and 4, a weldedplate structure is subjected to integral annealing heat treatment, and welding residual stress generated by a large quantity of welding among the steel panel, the longitudinal stiffening rib and the transverse partition plate (beam) are eliminated. By means of comprehensive measures above, overall anti-fatigue performance of the orthotropic plate structure is greatly improved, the century difficulty of orthotropic welding seam fatigue cracking is solved, and service lives of the steel panel and a bridge are prolonged.

Description

technical field [0001] The invention relates to the technical field of steel structure bridges and shipbuilding, in particular to a fatigue-resistant orthotropic plate structure and a production process. Background technique [0002] Orthotropic plates have the characteristics of light weight, superior deformation coordination performance, good viscosity, convenient maintenance and comfortable driving, so they are widely used in the fields of long-span steel bridges and large ships at home and abroad. [0003] The traditional orthotropic plate processing is to only weld the longitudinal stiffeners during the steel panel processing, while the diaphragm needs to be welded as a whole when the steel box girder is assembled. Due to the special structural form of the orthotropic plate, a large amount of welding is required , thus generating severe welding residual stress in the weld seam and heat-affected zone, forming weak parts of material metallographic structure and mechanics,...

AI Technical Summary

Problems solved by technology

[0004] At present, the quality of the orthotropic plate can only be enhanced by strengthening the welding quality and increasing the thickness of the steel plate.

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