Orthotropic steel bridge deck structure with V-shaped stiffening ribs

Abstract

The invention discloses an orthotropic steel bridge deck structure with V-shaped stiffening ribs, comprising a box girder and steel bridge deck slabs, wherein the box girder mainly comprises middle longitudinal diaphragms, side longitudinal diaphragms and a transverse diaphragm; the steel bridge deck slabs are arranged on the top of the box girder; a plurality of V-shaped stiffening ribs are uniformly arranged at the bottom of the heavy load area of the steel bridge deck slabs; a plurality of inverted trapezium-shaped stiffening ribs are uniformly arranged at bottoms of steel bridge deck slabs at two sides of the heavy load area; a plurality of first via holes matched with the V-shaped stiffening ribs and a plurality of second via holes matched with the inverted trapezium-shaped stiffening ribs are arranged on the transverse diaphragm; the V-shaped stiffening ribs are fixedly connected with the transverse diaphragm through the first via holes; and the inverted trapezium-shaped stiffening ribs are fixedly connected with the transverse diaphragm through the second via holes. According to the invention, the V-shaped stiffening ribs are arranged at the heavy load area, therefore, compared with a conventional structure with the inverted trapezium-shaped stiffening ribs, the structure disclosed by the invention has the advantages that the fatigue stress amplitude of sensitive positions of the orthotropic steel bridge deck is lesser; the fatigue performance is better; the fatigue life of the structure is longer; and the requirement for service life can be better satisfied.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a V-rib stiffened orthotropic steel bridge deck structure. technical background [0002] The orthotropic steel deck is composed of thinner panels, longitudinal ribs and transverse ribs. The three are perpendicular to each other and welded together to bear the deck load. Since the stiffness in the perpendicular direction is different, the force behavior exhibits anisotropy. [0003] The longitudinal ribs of the steel bridge deck are divided into closed stiffeners and open stiffeners according to whether the stiffener section is closed. Closed ribs and open ribs can be subdivided into many types according to the different cross-sectional forms. At present, the commonly used open ribs mainly include flat steel plates (flat ribs), unequal angle steel (L-shaped ribs) and T-shaped combined ribs (inverted T ribs), while trapezoidal stiffeners are mostly used for closed ribs....

AI Technical Summary

Problems solved by technology

The fatigue problem of steel bridge decks has always been a concern. Many steel bridges, especially heavy-duty steel bridges such as railways, urban tracks and highways passing trucks, soon after service, the steel bridge decks in the heavy-duty area, especially the longitudinal ribs There are different degrees of fatigue cracks at the arc-shaped openings of the transverse ribs, and they are premature, multiple, and reproducible, which seriously affects the fatigue durability of the steel bridge and greatly shortens the service life of the bridge.

Due to the different load and stiffness requirements of railways and highway bridges, this measure is too vague and empirical, and the actual application is more arbitrary and difficult

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