Bridge local crack repair method, device and equipment based on 3D printing Fe-SMA

By using 3D-printed Fe-SMA for localized bridge crack repair, combined with acoustic emission sensors and predictive models, precise matching and active reinforcement of bridge cracks were achieved. This solves the problem that Fe-SMA components cannot fully utilize their effectiveness in existing technologies, and improves the bridge crack repair effect and real-time monitoring capability.

CN122243458APending Publication Date: 2026-06-19SHIJIAZHUANG TIEDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHIJIAZHUANG TIEDAO UNIV
Filing Date
2026-03-11
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technologies make it difficult to prepare Fe-SMA components that perfectly match the complex crack morphology, resulting in the inability to fully exert the reinforcement effect. Traditional reinforcement methods cannot monitor damage development in real time and are prone to causing hidden damage. Bridge non-destructive testing technology cannot achieve real-time dynamic monitoring.

Method used

The bridge local crack repair method based on 3D printing Fe-SMA uses acoustic emission sensors to collect bridge signals and design drawings to build an overall model. Combined with a pre-trained prediction model and a repair scheme database, the design parameters of the crack repair component are determined. Then, Fe-SMA repair components are printed using 3D printing equipment to achieve precise matching and active reinforcement with the crack.

Benefits of technology

It achieves precise matching between Fe-SMA components and bridge cracks, enabling the application of effective mechanical constraints in advance, fully leveraging the reinforcement performance, improving crack repair results, and monitoring crack development in real time to reduce the risk of hidden damage.

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Abstract

This invention provides a method, apparatus, and equipment for repairing localized cracks in bridges based on 3D-printed Fe-SMA, relating to the field of crack repair technology. The method includes: establishing an overall model of the target bridge based on acoustic emission signals collected by a pre-deployed acoustic emission sensor array and the original design drawings of the target bridge; further determining the crack characteristics of the target bridge and inputting these characteristics into a pre-trained prediction model to obtain crack propagation prediction information; determining the design parameters of the crack repair component based on the crack characteristics, crack propagation prediction information, and a pre-built repair scheme database; the material of the crack repair component is Fe-SMA; and controlling a 3D printing device according to the design parameters of the crack repair component to print Fe-SMA components with shapes and sizes that fit the cracks in the target bridge. This invention enables the crack repair component to better match the actual condition of the bridge crack, improving the bridge crack repair effect.
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