Reinforcing beam reinforced by adopting retired wind power blade and method for determining bending rigidity of reinforcing beam

By setting grooves and raised structures of reinforcement layers on the surface of reinforced concrete beams, combined with cement-based composite matrix and reinforcing bars, the problems of performance degradation and weak interfacial bonding of FRP materials at high temperatures are solved, achieving efficient and low-cost reinforcement and sustainable development.

CN121675641APending Publication Date: 2026-03-17ROAD & BRIDGE INT CO LTD
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Patent Information

Application Number
CN202610041269.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-13
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing FRP materials degrade in performance under high-temperature environments such as fires. The interface bonding between FRP bars and cement matrix is ​​weak, resulting in unstable reinforcement effects and high costs, making large-scale application difficult.

Method used

The reinforced beam, made from decommissioned wind turbine blades, uses grooves and raised reinforcement layers on the surface of the reinforced concrete beam to create a concave-convex fit. Combined with a cement-based composite matrix and reinforcing bars, it replaces traditional FRP reinforcement materials and enhances the interfacial anchorage capacity.

Benefits of technology

It achieves high-performance reinforcement of reinforced concrete beams, reduces costs, improves interfacial shear and anti-slip properties, ensures stable and reliable long-term service performance, and realizes the resource-based reuse of waste composite materials.

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Abstract

The invention provides a reinforcing beam reinforced by adopting an out-of-service wind power blade and a method for determining the bending rigidity. According to the reinforcing beam, a plurality of grooves are formed in at least one surface of a reinforced concrete beam; the reinforcing layer comprises reinforcing ribs and a cement-based composite matrix, a plurality of protrusions are arranged on the surface of the cement-based composite matrix, the protrusions are arranged at intervals in the length direction of the cement-based composite matrix, and the protrusions are correspondingly embedded into the grooves, so that the reinforcing layer is connected with the reinforced concrete beam to obtain a reinforced concrete reinforced beam; wherein the reinforcing ribs are obtained by disassembling and cutting a main beam of the retired wind power blade. According to the reinforcing beam, the combining capacity of the reinforced concrete beam and the reinforcing layer is high, mutual slippage is avoided, the retired wind power blade composite material resources are utilized, the environment is protected, and the cost is saved while high-performance reinforcing treatment can be conducted on the damaged reinforced concrete beam structure or the reinforced concrete beam structure with insufficient bearing capacity.
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