A crack-damage controllable frp grid reinforced high durability reinforced concrete column structure

Abstract

The invention discloses a crack-damage controllable high-durability reinforced concrete column structure reinforced by a (Fiber Reinforce Plastic) FRP gridding. The structure comprises a column bottom and a column body located on the column bottom, wherein the column body is composed of concrete and a skeleton arranged in the concrete. The structure is characterized in that the skeleton comprises a reinforcing steel bar skeleton and at least one layer of FRP gridding, wherein the lower ends of the reinforcing steel bar skeleton and the FRP gridding are stretched into the column body, the height of the FRP gridding is greater than that of a plastic hinge region of the column, the FRP gridding is arranged on the periphery of the reinforcing steel bar skeleton and is fixed with the reinforcing steel bar skeleton through limiting supports, and not less than four limiting supports are arranged in the same plane. The crack-damage controllable high-durability reinforced concrete column structure disclosed by the invention can make full use of the respective advantages of the concrete, the FRP gridding and the reinforcing steel bar and has the advantages of corrosion resistance, high bearing capacity and crack-damage controllability, and the like, and a new choice is provided for modern civil engineering construction.

Description

technical field [0001] The invention belongs to a civil engineering structural component, in particular to a high-durability composite column with crack resistance and controllable damage, which is composed of three different materials: FRP grid, steel bar and concrete, and is especially suitable for ocean, wet and saline-alkali land High-rise buildings, bridge projects, underground projects and port projects in harsh environments. Background technique [0002] At present, in harsh environments such as ocean, humidity and saline-alkali land, bridge structures are facing a major problem, that is, corrosion of steel bars. Rebar corrosion can be considered a major cause of degradation of concrete members subjected to harsh environments such as concrete piles and pier columns. In order to prevent the corrosion problem of rebar, researchers have implemented many methods, but all have their limitations. Fiber Reinforced Polymer (FRP) has the advantages of high strength, light we...

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Problems solved by technology

At the same time, the axial stiffness of the FRP pipe is low. During the process of pouring concrete, local buckling may occur due to the self-weight of the concrete, resulting in excessive lateral deflection and local buckling failure.

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