Orthotropic steel bridge deck structure with transverse straining beam

Abstract

The invention relates to an orthotropic steel bridge deck structure with a transverse straining beam. The structure comprises a cover plate, a plurality of longitudinal reinforcing ribs which are arranged on the lower surface of the cover plate in parallel and a plurality of transverse reinforcing ribs which are arranged on the lower surfaces of the longitudinal reinforcing ribs in parallel and are vertical to the longitudinal reinforcing ribs, wherein the longitudinal reinforcing ribs are opening reinforcing ribs; tops of vertical parts of the longitudinal reinforcing ribs are fixedly connected with the cover plate through double-faced welding lines; the transverse straining beam is used for fixedly connecting the plurality of longitudinal reinforcing ribs through horizontal parts of the longitudinal reinforcing ribs. Compared with the prior art, the opening reinforcing ribs are used as the longitudinal reinforcing ribs, so that the longitudinal reinforcing ribs and the cover plate can be fixedly welded together through the double-faced welding lines and stress concentration is reduced; an anti-fatigue cracking performance of the structure is effectively improved, the service life of the structure is prolonged and the safety is good; the longitudinal opening reinforcing ribs, which are arranged in parallel, are fixedly connected together through the transverse straining beam so that the whole stress performance of the structure is improved.

Description

technical field [0001] The invention belongs to the technical field of steel structure bridges, and relates to an orthotropic steel bridge deck structure with transverse tie beams. Background technique [0002] Orthotropic steel bridge deck is a structural unit often used in the design and construction of steel structure bridges to directly bear the vehicle load on the bridge deck. It has the advantages of light weight, high bearing capacity, and convenient construction. The orthotropic steel bridge deck is mainly composed of the cover plate and the longitudinal stiffeners and transverse stiffeners (or transverse diaphragms, beams) welded on the lower surface. This type of steel bridge deck is called an orthotropic steel bridge deck. Among them, longitudinal stiffeners include open stiffeners (such as plate ribs, bulbous flat steel ribs, L-shaped ribs, and T-shaped ribs) and closed stiffeners (such as trapezoidal ribs, U-shaped ribs, V-shaped ribs, and Y-shaped ribs). Clos...

AI Technical Summary

Problems solved by technology

During use, due to the repeated action of the vehicle load, the structure is prone to fatigue cracks at the most sensitive parts of the stress concentration, especially near the on-site butt welding parts of the closed stiffeners, near the welded parts of the closed stiffeners and the cover plate, The junction of closed stiffeners and transverse ribs (or diaphragms, beams) is prone to weld cracks, which reduces the service life of the bridge and poses serious safety hazards

In addition, in order to facilitate the welding of the longitudinal closed stiffener and the cover plate, it is necessary to open a through hole on the transverse stiffener to make way for the longitudinal closed stiffener, but at the same time, the opening of the through hole will cause the local section of the transverse stiffener to be weakened , reducing the strength of transverse stiffeners, which in turn affects the overall mechanical performance of orthotropic steel bridge decks

Images