Large-span suspension bridge GFRP rib prefabricated slab composite beam bridge deck system and construction method thereof

Abstract

The invention discloses a large-span suspension bridge GFRP rib prefabricated slab composite beam bridge deck system, which comprises steel longitudinal beams, transverse tie beams, prefabricated bridge deck slabs and cast-in-place concrete joints, wherein the plurality of steel longitudinal beams are arranged in parallel at intervals, the two ends of the steel longitudinal beams are fixedly connected through the transverse tie beams, stud shear keys are arranged at the top ends of the steel longitudinal beams, the prefabricated bridge deck slab is erected above the two adjacent steel longitudinal beams, every two adjacent prefabricated bridge deck slabs are connected through the cast-in-place concrete joint, GFRP ribs are arranged in the prefabricated bridge deck slabs, the ends of the GFRP ribs protrude out of the prefabricated bridge deck slabs, and the reserved GFRP ribs at the ends of the prefabricated bridge deck slabs are embedded between the stud shear keys and connected with the GFRP ribs in the cast-in-place concrete joint in a binding and lap joint mode. According to the large-span suspension bridge GFRP rib prefabricated slab composite beam bridge deck system and the construction method thereof, cracks of the concrete slabs can be effectively reduced, and the durability problem of the bridge deck system due to the fact that cracked steel bars are exposed in a chlorine salt environment can be solved.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a GFRP reinforced prefabricated slab composite girder deck system of a long-span suspension bridge and a construction method thereof. Background technique [0002] Suspension bridges have become one of the preferred bridge types for long-span bridges due to their advantages of large spanning capacity, light weight and beautiful appearance, and full use of material strength. There are two types of stiffening girders in suspension bridges: steel truss girders and flat steel box girders. When steel truss girders are used as stiffening girders, the deck system can be divided into reinforced concrete slab deck systems, steel deck systems and steel-concrete composite deck systems. Deck system. In long-span suspension bridges, reinforced concrete slab deck systems are generally not used; orthotropic steel deck systems are widely used, but they are prone to fatigue cracking; s...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a long-span suspension bridge GFRP reinforced prefabricated slab composite girder deck system and its construction method, aiming at not only effectively reducing the generation of concrete slab cracks, but also solving the problem of steel bars being exposed to chloride salt environment after cracking Durability of bridge deck system

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