Novel intelligent FRP bendable composite steel

Abstract

The invention discloses novel intelligent FRP bendable composite steel which is shaped like a cylinder and comprises, from the center to the outmost layer, core rebar, a high-strength steel wire, high-elastic modulus FRP rebar, low-elastic modulus FRP rebar and a rebar base body which successively coat the steel, wherein intelligent optical fiber sensors are uniformly distributed in the low-elastic modulus FRP rebar. The steel disclosed by the invention is resistant to fire, resistant to corrosion, capable of rigid bending, capable of realizing intelligent monitoring and the like, and can be taken as a high-performance construction rebar material.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a novel intelligent FRP bendable composite steel. Background technique [0002] With the development of the country's economy, the number of infrastructure construction projects is increasing. Reinforced concrete or FRP concrete, as commonly used materials in construction projects, is widely used in various infrastructure constructions. Concrete materials are made of cementitious materials such as cement, sand, gravel and water, which are mixed with admixture materials and admixtures in a certain proportion. After solidification and curing, they have good anti-pressure properties. Concrete has poor tensile properties and is prone to fracture under tension. In order to solve the shortcomings of insufficient tensile performance of concrete and give full play to the characteristics of strong compressive capacity, a certain amount of stressed steel bars or FRP bars with s...

AI Technical Summary

Problems solved by technology

[0003] (1) Traditional threaded steel has poor corrosion resistance and is not fire-resistant. In important projects such as bridges, roads, ports, and marine engineering, the problem of serious degradation of performance due to corrosion of steel bars is very serious;

[0004] (2) Steel strands have poor plastic deformation, are not fire-resistant, and have poor corrosion resistance, so they are expensive to use and maintain in bridges and super high-rise buildings;

[0005] (3) FRP bars have no plastic deformation, are not fire-resistant, have low elastic modulus, are easy to age, have low interlayer shear strength, and poor shear and compressive properties.

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