Method for reinforcing concrete column by utilizing PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe

Abstract

The invention provides a method for reinforcing a concrete column by utilizing a PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe and belongs to the technical field of civil engineering. The method is suitable for maintaining and reinforcing the concrete columns in civil buildings, industrial plants and bridge structures. By mainly aiming at the reinforced concrete column, a PVC pipe is sheathed outside the concrete column, a reinforcing steel bar is configured in the PVC pipe, FRP cloth is wound outside the PVC pipe to form restraint action on the concrete column with the PVCpipe, and the internal pressure of the PVC pipe sheathed outside should reach above 1Mpa. The FRP cloth can adopt a carbon fiber composite material, a glass fiber composite material or an aramid fiber composite material. Compared with the traditional reinforcing method, the method for reinforcing the concrete column by utilizing the PVC-FRP pipe has the advantages that the reinforced concrete column is high in bearing capacity, small in cross section size and good in ductility and durability; and the method is convenient to construct, low in construction price and the like.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a method for reinforcing concrete columns with PVC-FRP pipes. The method is applicable to the maintenance and reinforcement of concrete columns in civil buildings, industrial workshops and bridge structures. Background technique [0002] During the long-term use of reinforced concrete structures, under the influence of internal, external, and human factors, material aging and structural damage will occur as time goes by. The accumulation of this damage will lead to deterioration of structural performance, decline in bearing capacity, Decreased durability. In order to make the structure still meet the requirements of the design specification on bearing capacity and normal service performance, these structures must be reinforced and reinforced. [0003] The existing methods of reinforcement and reinforcement mainly include enlarging section method, outsourcin...

AI Technical Summary

Problems solved by technology

The method of enlarging the cross-section mainly has the following disadvantages: increasing the area of ​​the structure and reducing the use of space; it needs to formwork, formwork removal and other processes, the construction period is longer; the effect of improving the bearing capacity is not significant

The outsourcing steel reinforcement method mainly has the following disadvantages: the amount of steel is large and the cost is high; the durability of the structure is poor; the end of the steel plate is not easy to anchor

The FRP reinforcement method mainly has the following disadvantages: the amount of FRP is large and the cost is high; the transverse deformation of the concrete under the load is uneven, which causes the stress concentration of the FRP, resulting in a low utilization rate of the FRP

Images