Method for reinforcing concrete structure with prestressed FRP batten embedded at end

Abstract

The invention discloses a method for reinforcing a concrete structure with a prestressed FRP batten embedded at the end. The method comprises the following steps that (1) grooving is carried out, andparticularly, the two ends of the tension side of the concrete structure to be reinforced are symmetrically provided with end grooves with the same number; (2) an FRP batten pressing device is installed at the end of the concrete structure; (3) the FRP batten is tensioned through tensioning equipment, prestress is applied to the FRP batten, the two ends of the FRP batten are pressed into the end grooves at the two ends of the concrete structure by the FRP batten pressing device, and the interiors of the end grooves and the surfaces between the end grooves corresponding to the concrete structure are filled with adhesive; and 4, prestress is released after the adhesive is cured, and the FRP batten pressing device is dismantled. The reinforcing effect is good, the damage to the existing structure is small, and the engineering cost is obviously reduced.

Description

technical field [0001] The invention relates to the technical field of concrete structure reinforcement, in particular to a concrete structure reinforcement method in which prestressed FRP laths are embedded at the ends. Background technique [0002] At present, more than one million railway and highway bridges have been built in my country. It is a veritable bridge country, and more than 90% of them are concrete bridges. Due to the rapid growth of traffic volume and vehicle load, the problems of performance degradation and safety decline of service bridges have become increasingly prominent. Frequent bridge collapse incidents have made society put forward higher requirements for the service safety of bridges, and new bridge reinforcement technologies urgently need to be developed. and apply. [0003] Bridge reinforcement technology based on fiber-reinforced composites (FRP) has many advantages over traditional reinforced concrete bridge structure reinforcement methods: FRP...

AI Technical Summary

Problems solved by technology

However, this reinforcement method requires slotting in the structural concrete protective layer and has high requirements for slotting accuracy. For large-scale structures such as long-span bridges, the construction workload is increased. At the same time, a large-scale opening of the structure is required before reinforcement. Slots are also likely to cause concerns or concerns about structural damage in relevant management departments

Images