Bridge structure intelligent reinforcing assembly and fiber grating sensor combining and bonding method

Abstract

The invention discloses a bridge structure intelligent reinforcing assembly and a fiber grating sensor combining and bonding method. The bridge structure intelligent reinforcing assembly comprises a carbon fiber rib material, a coating portion coating the fiber grating sensor and bonded to the surface of the carbon fiber rib material, an anchoring structure for fixing both ends of the carbon fiber rib material and a beam body, and a fiber grating demodulator connected with the fiber grating sensor; wherein the fiber grating sensor comprises a plurality of multimode or single-mode optical fibers arranged in parallel and provided with one or more fiber bragg gratings. The bridge structure intelligent reinforcing assembly can improve the survival rate of the fiber grating sensor combined and bonded to the carbon fiber rib material, reduces the production cost of the intelligent carbon fiber rib material, uses intelligent monitoring technology to supervise the construction quality of a prestress carbon fiber reinforced bridge structure, and realize long-term monitoring of the bridge structure reinforcement performance and health safety.

Description

technical field [0001] The invention relates to the intelligent reinforcement engineering of buildings and bridges and the technology of structural intelligent health and safety monitoring, in particular to a method for bonding carbon fiber reinforcements and carbon fiber plates to optical fiber grating sensors. Background technique [0002] The technology of using intelligent prestressed carbon fiber reinforcement to strengthen the bridge structure is to use the carbon fiber reinforcement as the prestressed reinforcement, apply prestress to the carbon fiber reinforcement and anchor it to the upper structural member of the reinforced bridge through a special tensioning and anchoring device On the other hand, it can be bonded with the flexural and tensile members of the bridge through epoxy structural adhesive or concrete to carry the tensile stress. It can combine the advantages of external prestressed active reinforcement technology with the high strength performance of carb...

AI Technical Summary

Problems solved by technology

When the patent uses a single-mode fiber grating sensor to be implanted and composited, due to the large diameter of the fiber grating sensor and the low tensile and shear strength of the wire, when it is synchronously pulled into the mold with carbon fibers, the irregular alignment of the carbon fibers will easily cause the fiber jumper to pull. shear damage, so it is prone to lower survival rate or decreased accuracy of FBG sensor

At the same time, due to the large cross-sectional area of ​​the fiber grating sensor, the volume content of carbon fiber is reduced after implantation and compounding, resulting in a significant decrease in the specific strength of the reinforcement

Secondly, the diameter of the fiber grating sensor wire is small, which also brings great difficulties to the fiber fusion after the carbon plate is cut.

Images