A Post-tensioned Prestressed Intelligent Reinforcement System Based on Fiber Bragg Grating Sensing Technology

Abstract

The invention relates to a post-tensioned prestressed intelligent reinforcement system based on optical fiber grating sensing technology, including intelligent steel strand (1), coating layer (2), sheath (3) and anchor head, intelligent steel strand , coating agent layer, and sheath to form an externally prestressed intelligent steel strand, the end of the externally prestressed intelligent steel strand is connected to the reinforced system through an anchor head, and an optical fiber grating sensor (11) is installed in the intelligent steel strand (1) ), the fiber grating sensor (11) is divided into a monitoring fiber grating sensor (111) and a temperature compensating fiber grating sensor (112). The present invention organically combines the fiber grating intelligent steel strand and the post-tensioning prestressing technology and applies it to the external prestressing reinforcement system, so that it can meet the strength, stability and durability required for reinforcement and have sensory characteristics at the same time. An intelligent reinforcement system is formed, which can be widely used in post-tensioned prestressed reinforced structures such as masonry structures, concrete structures, and steel structures that use steel strands as stress components.

Description

technical field [0001] The invention relates to the fields of safety monitoring and building structure materials, in particular to a post-tensioning prestressed intelligent reinforcement system based on optical fiber grating sensing technology. Background technique [0002] The prestressed reinforcement method is a method of strengthening the structural members or the whole by adding prestressed steel tie rods or section steel braces. The stress level of the original structure completely eliminates the stress-strain hysteresis phenomenon unique to the general reinforced structure. Therefore, the post-added part and the original structure can work together better, and the overall bearing capacity of the structure can be significantly improved. The prestressed reinforcement method has the triple effects of reinforcement, unloading, and changing the internal force of the structure. It is suitable for the reinforcement of long-span structures, as well as the reinforcement of lar...

AI Technical Summary

Problems solved by technology

[0005] The present invention designs a post-tensioned prestressed intelligent reinforcement system based on fiber grating sensing technology, which solves the technical problem that the existing prestressed reinforcement system cannot take into account the integration of reinforcement and monitoring, and does not consider the long-term application of the solid system The fact that the temperature will definitely change during the process, ultimately leads to a deviation of the calculated force value of the prestressed strand from the real value

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