A cfrp/bfrp longitudinal bar-gfrp composite stirrup square pipe pile and its design method

Abstract

The invention belongs to the technical field of civil engineering, and discloses a CFRP / BFRP longitudinal bar-GFRP composite stirrup square pipe pile and a design method. CFRP / BFRP longitudinal reinforcement is used for longitudinal reinforcement and prestressed reinforcement; two layers of FRP reinforcement cages are set on the square pipe pile, and the outer layer of FRP reinforcement cage is composed of vertical CFRP / BFRP longitudinal reinforcement and GFRP hoop arranged along the outer edge of the square pipe pile. The inner circular FRP reinforcement cage is composed of prestressed CFRP / BFRP longitudinal reinforcement and GFRP spiral reinforcement arranged along the edge of the circular cavity. The inner prestressed CFRP / BFRP longitudinal reinforcement is mainly used for the tensile force of the square pipe pile as an uplift pile, and to increase the crack resistance of the square pipe pile by applying prestress, and to improve the lateral stiffness and durability of the square pipe pile. The stress bars of the pipe piles of the present invention are all made of reinforced fiber composite materials, instead of steel materials, so that the pipe piles have strong corrosion resistance and are suitable for strong corrosive environments such as deep sea.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a CFRP / BFRP longitudinal reinforcement-GFRP composite stirrup square pipe pile and a design method thereof. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: the traditional reinforced concrete structure is in the harsh service environment typified by the marine environment, and its built-in steel bars will accelerate corrosion due to the continuous intrusion of chloride ions in seawater and sea fog. Make the structure face the problem of insufficient durability prematurely. At present, under the "Maritime Silk Road" strategy, my country has promoted the development and construction of sea islands and artificial islands to a national strategic level, which urgently requires the construction of a large number of ports, terminals, airport runways, towers, lighthouses, ocean platforms and Hospitals, s...

AI Technical Summary

Problems solved by technology

[0005] (1) Highly corrosive natural environments such as oceans cause loss to pipe piles;

[0006] (2) Under the large horizontal force generated by typhoons and waves in the marine environment, the pipe piles will be damaged

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