Intelligent carbon fiber composite board

Abstract

The invention discloses an intelligent carbon fiber composite board. The intelligent carbon fiber composite board mainly comprises a plurality of bundles of CFRP (composite fiber reinforced plastics) filaments, resin and fiber gratings, wherein the CFRP filaments are bi-directional orthogonal CFRP filaments, the fiber gratings are arranged in the middle part of each bundle of CFRP filaments, the fiber gratings are parallel to the CFRP filaments, and the resin fills between each bundle of CFRP filaments and each fiber grating. Each fiber grating is a germanium-silicon fiber bragg grating. The resin is vinyl ester resin. The CFRP filaments are used as a reinforcing material, the resin is used as a reinforcing basal body of the board, the germanium-silicon fiber bragg grating is used as an intelligent monitoring material, and each fiber grating is parallel to the CFRP filaments, so that a resin-enriching area is prevented from forming near the fiber grating, the non-uniform stress area surrounding the sensor can be maximally reduced, the loss of the measurement precision of the fiber grating can be reduced, the performance of the composite board is better than each fiber board in the prior art, and the requirement of a steel structure reinforcing repairing technology can be met.

Description

technical field [0001] The invention relates to the field of construction, in particular to an intelligent carbon fiber composite board. Background technique [0002] In recent years, with the acceleration of my country's urbanization process, the structural form of urban buildings has gradually changed to the direction of high-rise, super high-rise and long-span. It can be seen that the steel structure adapted to this form naturally occupies a pivotal position in the national economy. However, due to the erosion of the natural environment, unpredictable loads or human factors during the use of steel, it is inevitable that various structural damages will occur. When the damage accumulates to a certain extent, it will lead to the failure of the structure. Among them, fatigue damage is a common failure mode of steel structures. Relevant research shows that about 50% to 90% of the failure modes of steel structures in my country belong to fatigue damage. Based on the scarcity ...

AI Technical Summary

Problems solved by technology

The structural details (such as welding defects, specimen drilling, etc.) of traditional steel structure strengthening methods are very sensitive to fatigue loads and cannot monitor the long-term performance of the structure