Ultra high performance concrete rib with rib bottom steel plate for bridge deck slab

Abstract

The invention provides an ultra high performance concrete rib with a rib bottom steel plate for a bridge deck slab. The ultra high performance concrete rib with the rib bottom steel plate for the bridge deck slab is mainly to solve technical problems, such as easy fatigue cracking, poorer tensile and compressive performance, low section utilization efficiency and high cost, of an existing ultra high performance concrete rib. The key point of the technical scheme is that the ultra high performance concrete rib with the rib bottom steel plate for the bridge deck slab comprises a rib body (7) andthe rib bottom steel plate (3); the rib bottom steel plate (3) is arranged at the bottom of the rib body (7); a shear connector (4) is arranged on the upper surface of the rib bottom steel plate (3);ultra high performance concrete is poured around the shear connector (4) on the rib bottom steel plate (3) to form the rib body (7); and the upper part of the shear connector (4) is connected with areinforcing mesh in a panel (1). The ultra high performance concrete rib with the rib bottom steel plate for the bridge deck slab is mainly used for the bridge deck slabs.

Description

Technical field [0001] The invention relates to an ultra-high performance concrete rib used for a ribbed bottom steel plate of a bridge deck. Background technique [0002] The bridge deck directly bears vehicle loads and environmental effects, and is the most directly affected component by unfavorable factors such as overload, corrosion, fatigue, etc. Therefore, its working state will directly affect the durability and driving comfort of the main structure of the inverted bridge. Orthotropic steel decks and ordinary concrete decks are the two main types of decks currently used in bridge engineering. Ordinary concrete bridge deck can be better adapted to asphalt concrete deck paving or cement paving, and the driving effect is better. However, due to the low tensile strength of ordinary concrete, the thickness of the ordinary concrete deck is large, and the structural self-weight is large. It is required for long-span bridges, and it is easy to crack near wet joints, negative bend...

AI Technical Summary

Problems solved by technology

However, this type of structure is only suitable for ordinary concrete composite bridge decks. For ultra-high performance concrete composite bridge decks, the strong confinement steel plate is easy to cause shrinkage and cracking of ultra-high performance concrete, and the excellent compressive and tensile properties of ultra-high performance concrete cannot be exerted. Moreover, the steel plate with holes in the head welded at both ends of the bottom steel plate in the width direction will block the continuous and random distribution of steel fibers, which will have an adverse effect on structural safety

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