Carbon fiber thin-wall steel tube concrete composite column with internal FRP sectional material and method

Abstract

The invention aims to provide a carbon fiber thin-wall steel tube concrete composite column with an internal FRP sectional material and a method. The carbon fiber thin-wall steel tube concrete composite column comprises the FRP sectional material, a thin-wall steel tube, an outer protection layer and concrete, wherein the FRP sectional material is arranged at the center of the thin-wall steel tube; the space between the FRP sectional material and the thin-wall steel tube is filled with concrete; the thin-wall steel tube is covered by the outer protection layer in a winding manner; the outer protection layer is carbon fiber reinforced plastic; the cross section of the FRP sectional material is crisscross, I-shaped, T-shaped, circular or square; the cross section of the thin-wall steel tube is circular or polygonal; the ratio of the cross-sectional area of the internal FRP sectional material to the integral cross-sectional area of the composite column is not greater than 15%. The manufacturing method of the composite column comprises the following specific steps: 1, putting the FRP sectional material into the steel tube, and fixing the FRP sectional material at the center of the steel tube; 2, covering the outer layer of the steel tube with the carbon fiber reinforced material layer; 3, pouring concrete inside the steel tube; 4, performing periodical maintenance.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a carbon fiber thin-walled steel pipe concrete composite column with built-in FRP profiles and a method thereof. Background technique [0002] Like all other industries in the national economy, my country's construction industry has experienced a process of rapid development since the reform and opening up. With the continuous development of urbanization in our country, infrastructure investment is in a period of large-scale construction, making the civil engineering industry always in a state of continuous expansion. Thin-walled concrete-filled steel tube (Concrete-Filled Steel Tube, abbreviated as CFST) is a new structural form that combines and works together with thin-walled plates, cold-formed thin-walled steel (including thin-walled steel tubes) and concrete. It is made by pouring concrete in steel pipes, which makes full use of the characteristics of...

AI Technical Summary

Problems solved by technology

[0003] Although the steel pipe concrete structure has many advantages, it is lighter than the reinforced concrete structure, and slightly heavier than the steel structure, but the self-weight of the structure increases with the increase of the storey height

Images