Fiber reinforcement composite material - concrete combination beam

Abstract

The invention belongs to the bridge engineering technical field, in particular to a combined beam of a fiber reinforcement composite material and concrete. The combined beam consists of an FRP profile, an upper layer of a longitudinal FRP rib, an upper layer of a horizontal FRP rib, a lower layer of the longitudinal FRP rib, a through FRP rib and a concrete plate. The FRP profile consists of fourparts of a perforated plate, an upper flange, a lower flange and a web plate. A template is paved at the position of the upper flange along the FRP profile; the FRP through rib is passed inside a hole of the perforated plate; the lower layer of the longitudinal FRP rib is lashed, the upper layer of the longitudinal FRP rib and the upper layer of the horizontal FRP rib are lashed on the perforatedplate, and finally the concrete is poured to combine into a whole. The invention develops sufficiently compression resistance property of the concrete and tensile property of the FRP profile, and theperforated plate has a function of transmitting a shearing force between the FRP profile and the concrete and preventing the FRP profile and the concrete from separating vertically. The combined beamrealizes a system of a non-steel combined beam and has the advantages of good corrosion resistance, good ductility and convenient construction, and has a wider application prospect in the bridge engineering field.

Description

A Fiber Reinforced Composite Material-Concrete Composite Beam technical field The invention belongs to the technical field of bridge engineering, and in particular relates to a fiber-reinforced composite material-concrete composite beam. Background technique For a long time, the corrosion of steel bars in concrete structures has seriously affected the performance of the structure and reduced the durability of the structure. Countries all over the world will spend huge sums of money every year to repair and strengthen concrete structures. To this end, engineers and technicians are committed to finding technical measures to fundamentally solve the problem of structural durability. Fiber-Reinforced Polymer / Plastic (FRP) has become one of the most potential materials to completely solve the durability problem of reinforced concrete structures due to its excellent corrosion resistance. FRP is a new type of high-performance material made by mixing fiber materials and matrix ma...

AI Technical Summary

Problems solved by technology

At present, most of the shear connections of FRP-concrete composite members use adhesives to directly bond concrete or sand. service life etc.

In addition, the FRP-concrete composite members using the bonded connection method often have bond layer peeling failures in the later stage of loading, and the member failures are relatively sudden.

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