Profiled steel sheet-UHP (ultra high performance) fiber reinforced concrete composite bridge deck

Abstract

A profiled steel sheet-UHP (ultra high performance) fiber reinforced concrete composite bridge deck comprises U-shaped profiled steel sheets, perforated steel sheets, vertical studs, horizontal reinforcements, longitudinal reinforcements and UHP fiber reinforced concrete. The vertical perforated steel sheets are longitudinally fixed in the centers of the grooves of the U-shaped profiled steel sheets. A plurality of fixed vertical stud rows are arranged on raised portions of the U-shaped profiled steel sheets. The horizontal reinforcements penetrate connecting holes in the perforated steel sheets and are welded with the upper ends of the vertical studs. The longitudinal reinforcements are perpendicular to the horizontal reinforcements and fixedly connected with joints of the horizontal reinforcements and the vertical studs. The UHP fiber reinforced concrete is poured in the U-shaped profiled steel sheets to cover the perforated steel sheets, the vertical studs and the horizontal and the longitudinal reinforcements. According to the arrangement, the adhesion performance of the interfaces of the profiled steel sheets and the UHP fiber reinforced concrete is improved, and mechanical advantages of the profiled steel sheets and the UHP fiber reinforced concrete are fully played. The profiled steel sheet-UHP fiber reinforced concrete composite bridge deck dead is low in weight, high in bearing capacity, excellent in anti-fatigue performance, available in industrialized production and on-field assemble, higher in bridge deck building and changing speed and the like.

Description

Technical field [0001] The invention relates to the field of bridge engineering, and relates to a combined bridge deck. Background technique [0002] With the rapid development of my country's transportation industry, orthotropic steel decks have been widely used in long-span bridge structures. However, after years of operation, the orthotropic steel bridge deck asphalt pavement has successively appeared vertical and horizontal cracks, rutting, delamination, pushing, potholes, bulging, and detachment from the steel deck. The orthotropic steel plate itself The lack of rigidity and the fatigue damage caused by welding defects and stress concentration at the weld cannot be ignored. Especially in recent years, a large number of large vehicles have appeared in our country, the wheel pressure of which has greatly exceeded the design load, which has further aggravated the development of the above-mentioned diseases of orthotropic steel bridge deck. [0003] At present, there have been i...

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Problems solved by technology

[0003] At present, there are industrial steel beams, ordinary concrete prefabricated slabs, asphalt concrete surface composite bridge decks, orthotropic steel plates, and thin-layer active powder concrete surface composite bridge decks to replace traditional orthotropic steel bridge decks, but the former The composite bridge deck is thicker and its own weight is larger; although the latter can greatly increase the stiffness of the composite bridge deck and reduce the stress amplitude, it does not fundamentally solve the possible fatigue damage of the orthotropic steel plate and the interaction between the flat steel plate and the active Interfacial bond failure, interlayer slippage, local bulging, delamination and other diseases that may occur between powder concrete

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