Hybrid frp short-cut fiber reinforced resin glue reinforced concrete beam structure

Abstract

This utility model discloses a hybrid FRP chopped fiber reinforced resin adhesive reinforced concrete beam structure, comprising: a concrete beam; a fiber reinforced resin composite layer disposed at the bottom of the concrete beam, the fiber reinforced resin composite layer being formed by a composite of fiber materials and resin materials; and a connector, the connector comprising a support portion and two connecting portions, the support portion extending along the width direction of the fiber reinforced resin composite layer and abutting against the bottom of the fiber reinforced resin composite layer, the two connecting portions respectively connecting to the two ends of the support portion and extending upwards, the two connecting portions respectively connecting to the opposite side walls of the concrete beam. This utility model's hybrid FRP chopped fiber reinforced resin adhesive reinforced concrete beam structure, through the combination of the fiber reinforced resin composite layer and the assemblable connectors, simplifies the construction process, reduces construction costs, and minimizes the increase in structural self-weight while ensuring the reinforcement effect on the concrete beam.

Description

Technical Field

[0001] This utility model relates to the field of concrete beam technology, and in particular to a concrete beam structure reinforced with hybrid FRP chopped fiber reinforced resin adhesive. Background Technology

[0002] During long-term use, concrete beams often suffer from defects such as concrete cracking or even spalling, which can lead to a decrease in the load-bearing capacity of the concrete beams and even structural collapse. In order to restore and improve the load-bearing capacity of the damaged reinforced concrete beams, it is necessary to reinforce the damaged concrete beams in service. However, the reinforcement methods for concrete beams in related technologies are complex, costly, and can increase the structural weight of the concrete beams themselves. Utility Model Content

[0003] The main objective of this invention is to propose a hybrid FRP chopped fiber reinforced resin adhesive for reinforcing concrete beam structures, aiming to solve the technical problem of how to simplify the reinforcement method of concrete beams, reduce reinforcement costs, and avoid increasing the self-weight of the structure.

[0004] To achieve the above objectives, the hybrid FRP chopped fiber reinforced resin adhesive reinforced concrete beam structure proposed in this utility model includes:

[0005] Concrete beams;

[0006] A fiber-reinforced resin composite layer is disposed at the bottom of the concrete beam, and the fiber-reinforced resin composite layer is formed by combining fiber materials and resin materials;

[0007] The connector includes a support portion and two connecting portions. The support portion extends along the width direction of the fiber-reinforced resin composite layer and abuts against the bottom of the fiber-reinforced resin composite layer. The two connecting portions are respectively connected to both ends of the support portion and extend upwards, and are respectively connected to the opposite side walls of the concrete beam.

[0008] Optionally, the fiber material includes glass fiber, and the resin material includes epoxy resin.

[0009] Optionally, the length of the glass fiber is set to 35mm to 50mm.

[0010] Optionally, the volume fraction of the fiber material in the fiber-reinforced resin composite layer is set to 10% to 20%.

[0011] Optionally, the fiber-reinforced resin composite layer is formed by mixing liquid resin material with filamentous or strip-shaped fiber material and then curing it.

[0012] Optionally, an accelerator is further added to the liquid mixture of the resin material and the fiber material, wherein the accelerator has a weight ratio of 0.1% to 1% of the resin material.

[0013] Optionally, a curing agent is further added to the liquid mixture of the resin material and the fiber material, wherein the curing agent accounts for 1% to 2% of the resin material.

[0014] Optionally, an epoxy resin layer is provided between the concrete beam and the fiber-reinforced resin composite layer.

[0015] Optionally, there are multiple connectors, which are spaced apart along the length of the concrete beam. The support portion of each connector abuts against the bottom of the fiber-reinforced resin composite layer, and the two connecting portions of each connector are connected to opposite side walls of the concrete beam.

[0016] Optionally, both of the connecting parts are provided with through holes, and the two opposite sidewalls of the concrete beam are provided with fixing holes. The through holes correspond to the fixing holes, and the through holes and fixing holes are connected by fasteners.

[0017] This invention presents a technical solution for reinforcing concrete beams with hybrid FRP (Chopted Fiber Reinforced Polymer) resin adhesive. Lightweight reinforcement is achieved through the synergistic effect of the bottom composite layer and mechanical connectors. The concrete beam, as the main body to be reinforced, has its bottom layer reinforced with a fiber-reinforced resin composite layer. The high strength of the fiber material directly enhances the beam's flexural strength. The composite layer uses a cured bond of fiber and resin, forming a continuous load-bearing interface while avoiding the weight burden of traditional steel plate reinforcement. The connectors employ a structure where the support laterally supports the composite layer and the double connectors are longitudinally anchored. The support extends along the width of the composite layer to ensure uniform load distribution, while the double connectors extend upwards and connect to the beam's sidewalls, forming a three-dimensional constraint. This ensures coordinated deformation of the composite layer and the beam while avoiding structural damage caused by drilling and inserting anchor bolts. The overall structure, through the combination of the fiber-reinforced resin composite layer and the prefabricated connectors, simplifies the construction process, reduces construction costs, and minimizes the increase in structural weight while maintaining effective reinforcement of the concrete beam. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1This is a structural disassembly diagram of an embodiment of the present invention for reinforcing concrete beams with hybrid FRP chopped fiber reinforced resin adhesive;

[0020] Figure 2 This is a schematic diagram of a structural embodiment of a concrete beam structure reinforced with hybrid FRP chopped fiber reinforced resin adhesive according to this utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present invention, which uses hybrid FRP chopped fiber reinforced resin adhesive to reinforce a concrete beam structure.

[0022] Explanation of icon numbers:

[0023] label name label name label name 10 concrete beam 20 Fiber-reinforced resin composite layer 30 connector 31 Support section 32 Connection part 321 Via 40 fastener

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] As a crucial load-bearing component in the building structure, concrete beam 10 is susceptible to environmental erosion and load variations during long-term use, leading to defects such as concrete cracking and spalling. These defects not only affect the structural aesthetics but also significantly reduce the beam's load-bearing capacity, potentially causing structural collapse in severe cases. Traditional reinforcement methods, such as steel plate bonding and carbon fiber reinforcement, have significant shortcomings: steel plate reinforcement increases the structure's self-weight and requires large hoisting equipment during construction; carbon fiber reinforcement demands strict substrate preparation and has high material costs. The existing reinforcement methods for concrete beams are complex, costly, and increase the structural weight of concrete beam 10.

[0029] This invention proposes a method for reinforcing concrete beam structures with hybrid FRP chopped fiber reinforced resin adhesive, aiming to solve the technical problem of how to simplify the reinforcement method of concrete beam 10, reduce reinforcement costs, and avoid increasing the self-weight of the structure.

[0030] In the embodiments of this utility model, such as Figures 1 to 3 As shown, the hybrid FRP chopped fiber reinforced resin adhesive reinforced concrete beam structure includes: a concrete beam 10; a fiber reinforced resin composite layer 20, which is disposed at the bottom of the concrete beam 10 and is formed by combining fiber materials and resin materials; and a connector 30, which includes a support portion 31 and two connecting portions 32. The support portion 31 extends along the width direction of the fiber reinforced resin composite layer 20 and abuts against the bottom of the fiber reinforced resin composite layer 20. The two connecting portions 32 are respectively connected to the two ends of the support portion 31 and extend upward, and are respectively connected to the opposite side walls of the concrete beam 10.

[0031] In this embodiment, the concrete beam 10 is a reinforced concrete beam. The fiber-reinforced resin composite layer 20 refers to a structural layer formed by combining fiber materials and resin materials. Specifically, it can be formed by mixing glass fiber and epoxy resin and then curing it. The high strength characteristics of the fiber materials directly improve the bending load-bearing capacity of the beam, while stress is transferred through the continuous interface of the resin, avoiding the weight burden of traditional steel plate reinforcement. The support part 31 of the connector 30 refers to a support structure extending along the width direction of the fiber-reinforced resin composite layer 20. Specifically, it can be made of metal or composite material into a transverse strip-shaped component, which abuts against the bottom of the composite layer to achieve uniform load distribution and prevent local stress concentration that could lead to peeling of the composite layer. The two connecting parts 32 of the connector 30 refer to anchoring structures extending upward from both ends of the support part 31. Specifically, they can be vertical plates integrally formed with the support part 31, forming a three-dimensional constraint by connecting the two side walls of the concrete beam 10, ensuring that the composite layer and the beam deform together, while avoiding structural damage caused by drilling and inserting anchor bolts.

[0032] Through the synergistic effect of the fiber-reinforced resin composite layer 20 and the mechanical connector 30, a lightweight reinforcement structure is formed at the bottom of the concrete beam 10. The fiber composite layer replaces the traditional steel plate to reduce its self-weight, and the support part 31 and the double connection part 32 of the connector 30 are designed to achieve non-destructive anchoring, which simplifies the construction process and improves the integrity of the reinforcement layer and the beam through a three-dimensional constraint mechanism.

[0033] The concrete beam 10 serves as the main body to be reinforced, and a fiber-reinforced resin composite layer 20 is installed at its bottom. The fiber-reinforced resin composite layer 20 is formed by combining fiber materials and resin materials, utilizing the high strength characteristics of the fiber materials to directly improve the beam's bending load-bearing capacity. The composite layer adopts a cured bonding method between the fiber and the resin, forming a continuous stress interface and avoiding the weight burden of traditional steel plate reinforcement.

[0034] The connector 30 includes a support portion 31 and two connecting portions 32. The support portion 31 extends along the width direction of the fiber-reinforced resin composite layer 20 and abuts against the bottom of the fiber-reinforced resin composite layer 20 to ensure uniform load distribution. The two connecting portions 32 are respectively connected to both ends of the support portion 31 and extend upwards, respectively connecting to the opposite side walls of the concrete beam 10 to form a three-dimensional constraint. This structural design ensures coordinated deformation of the composite layer and the beam, avoiding structural damage caused by drilling and inserting anchor bolts.

[0035] The overall structure reinforces the concrete beam 10 through a combination of fiber-reinforced resin composite layer 20 and assemblable connectors 30. Support 31 laterally supports the composite layer, while double connectors 32 are longitudinally anchored to the beam, forming a three-dimensional constraint mechanism. This design simplifies the construction process, reduces construction costs, and minimizes the increase in structural weight.

[0036] The concrete beam 10 serves as the main body to be reinforced. The concrete beam 10 can be a precast beam or a cast-in-place beam, and its shape can be rectangular, T-shaped, or other common beam types.

[0037] The fiber material can be high-strength fibers such as glass fiber, carbon fiber, or aramid fiber. The resin material can be epoxy resin, polyester resin, or vinyl ester resin, etc. The fiber material is impregnated in the liquid resin, ensuring complete saturation.

[0038] The connector 30 can be made of metal materials such as steel or aluminum alloy, or high-strength engineering plastics. The connector 30 includes a transverse support portion 31 and two vertical connecting portions 32. The length of the support portion 31 should match the width of the fiber-reinforced resin composite layer 20. The two connecting portions 32 are located at opposite ends of the support portion 31 and extend upwards, with a height sufficient to connect to the sidewall of the concrete beam 10.

[0039] This application addresses the problems of complex processes, high costs, and increased structural weight resulting from existing concrete beam reinforcement methods. The use of the fiber-reinforced resin composite layer 20 avoids the weight increase associated with traditional steel plate reinforcement while providing high-strength bending reinforcement. The connector 30 simplifies the installation process, eliminating the need for drilling holes in the beam bottom and reducing damage to the original structure. The structural design of the support 31 and double connection 32 ensures effective connection and synergistic operation between the composite layer and the concrete beam 10, improving the reliability of the reinforcement effect. The overall solution reduces construction difficulty and cost, shortens the construction period, and guarantees the reinforcement effect. This lightweight reinforcement method not only improves the load-bearing capacity of the concrete beam 10 but also minimizes the additional load on the original structure, which is beneficial to the long-term stability of the structure.

[0040] Specifically, the fiber material includes glass fiber, and the resin material includes epoxy resin. When glass fiber is used as the reinforcing phase, its high modulus properties can share the tensile stress at the bottom of the concrete beam 10. For example, when the beam is bent, the fiber transfers stress to the uncracked area through the resin matrix, delaying crack propagation. Epoxy resin, as the matrix material, has low viscosity properties that facilitate mixing with the fiber to form a uniform slurry. After curing, the epoxy resin forms a continuous phase that encapsulates the fiber. Glass fiber has good tensile strength and corrosion resistance. Epoxy resin has excellent bonding properties and structural stability after curing. In the preparation process, the glass fiber is first cut into short fibers, with a length of 35 mm to 50 mm. Then, the cut glass fiber is mixed with liquid epoxy resin in a predetermined ratio, with the volume fraction of glass fiber in the composite layer set to 10% to 20%. Accelerators and curing agents can also be added to the mixture to adjust the curing speed and improve the performance of the composite material. After uniform mixing, the mixture is coated on the bottom of the concrete beam 10 and compacted using rollers to ensure uniform fiber distribution. Finally, it is cured at room temperature to form a fiber-reinforced resin composite layer 20.

[0041] By selecting glass fiber and epoxy resin as the materials for the fiber-reinforced resin composite layer 20, the mechanical properties and durability of the composite layer are effectively improved. The high strength of glass fiber enhances the tensile strength of the composite layer, while the excellent bonding properties of epoxy resin ensure a good bond between the composite layer and the concrete beam 10. The combination of the two materials optimizes the overall performance of the composite layer and improves the reinforcement effect. At the same time, since both glass fiber and epoxy resin are common engineering materials, their costs are relatively controllable, ensuring the economic efficiency of the reinforcement scheme. Furthermore, this material combination also has good corrosion resistance and durability, extending the service life of the reinforced structure.

[0042] In practical applications, the length of glass fiber is set to 35mm to 50mm, for example, 40mm. If the length of glass fiber is greater than 50mm, it will cause entanglement during the mixing process and the fiber will not be easy to wet. Therefore, setting the length of glass fiber to 35mm to 50mm can ensure sufficient anchorage length without causing the mixture to be too viscous or difficult to form, thereby optimizing the material processing performance and ensuring the load-bearing capacity of the reinforced structure.

[0043] For example, the volume fraction of the fiber material in the fiber-reinforced resin composite layer 20 is set to 10% to 20%, such as 15%. If the volume fraction of the fiber material is less than 10%, the resin will be too fluid; if the volume fraction of the fiber material is greater than 20%, the fiber will not be fully wetted. During the preparation of the fiber-reinforced resin composite layer 20, the fiber material and liquid epoxy resin are mixed in a volume ratio and then uniformly dispersed by mechanical stirring. When the fiber volume fraction is controlled at 10% to 20%, the resin fluidity ensures that the fiber material is fully wetted, and the continuous phase formed after curing can effectively transfer the load. The lower limit of 10% volume fraction allows the fiber material to form an effective load-bearing network in the composite layer, avoiding stress concentration due to excessively low fiber content. The upper limit of 20% volume fraction limits the fiber packing density, preventing interface defects caused by impeded resin flow.

[0044] A fiber volume fraction of 15% avoids the problem of insufficient stress transfer efficiency caused by excessively low fiber content, while also preventing the decrease in resin fluidity, interfacial bonding defects, and processing difficulties caused by excessively high fiber content. Furthermore, this volume fraction range achieves a synergistic improvement in the tensile strength and interfacial bonding strength of the composite layer, providing stable and reliable reinforcement performance for the concrete beam 10.

[0045] For example, the fiber-reinforced resin composite layer 20 is formed by mixing and curing a liquid resin material with filamentous or ribbon-shaped fiber material. The liquid resin material is configured to flow sufficiently during the mixing stage and coat the surface and gaps of the fiber material, and the filamentous or ribbon-shaped fiber morphology is designed to be oriented and distributed in the liquid resin to improve dispersibility. The curing process forms a three-dimensional network structure through the phase change of the resin material from liquid to solid, promoting interfacial bonding between the composite layer and the concrete beam 10. When bonded to the epoxy resin layer at the bottom of the concrete beam 10, the compressive stress generated by curing shrinkage can improve the interfacial bond strength, and together with the mechanical anchoring effect of the connector 30, a multi-level reinforcement system is formed.

[0046] Liquid resin materials can fully impregnate the surface and gaps of fibrous materials, ensuring close contact between fibers and resin. The fibrous morphology enhances the dispersion and directional distribution of fibers in the resin, improving the overall density and mechanical properties of the composite layer. The curing process transforms the liquid resin into a solid matrix, forming a stable three-dimensional network structure, further strengthening the synergistic load-bearing capacity between the composite layer and the concrete beam 10. As a result, the internal voids of the composite layer are reduced, the interfacial bonding is stronger, and the overall mechanical properties and reinforcement effect are significantly improved.

[0047] Liquid resin material mixed with filamentous or strip fiber material can be directly applied to the bottom of concrete beam 10. After curing, it directly forms fiber-reinforced resin composite layer 20. In this way, fiber-reinforced resin composite layer 20 can be adapted to any bottom shape of concrete beam 10 without pre-cutting, thereby simplifying the molding process of fiber-reinforced resin composite layer 20.

[0048] Specifically, an accelerator is added to the liquid mixture of resin and fiber materials, with the accelerator-to-resin ratio ranging from 0.1% to 1%. The accelerator can be a peroxide, amine compound, or metal salt, such as benzoyl peroxide, cobalt isooctanoate, or triethanolamine. The accelerator catalyzes the cross-linking reaction of the resin, shortening the curing time while avoiding excessive addition that could trigger side reactions. When the accelerator content is below 0.1%, the catalytic effect is insufficient; exceeding 1% may lead to resin embrittlement or a decrease in the interfacial bonding strength between the fiber and the matrix. The accelerator accelerates the curing reaction rate of the resin material, shortens the curing time, and improves the reaction efficiency. This avoids problems such as uneven stress distribution within the composite layer or decreased interfacial bonding strength caused by incomplete curing. Simultaneously, by strictly controlling the addition ratio of the accelerator, it is ensured that the accelerator effectively catalyzes the reaction while preventing excessive addition that could trigger side reactions or damage the mechanical properties of the resin matrix, thus guaranteeing the overall structural stability of the cured composite layer.

[0049] In practical applications, a curing agent is added to the liquid mixture of resin and fiber materials, with the curing agent accounting for 1% to 2% of the resin material. The curing agent effectively accelerates the cross-linking reaction of the resin material and shortens the curing time. The addition of the curing agent ensures that the curing reaction proceeds fully, avoiding the problem of a loose composite layer structure caused by incomplete curing. Simultaneously, because the proportion of the curing agent is controlled within a reasonable range, it prevents excessive curing agent from causing an excessively rapid reaction rate, resulting in internal stress or brittle defects. This optimized curing process enables the fiber-reinforced resin composite layer 20 to form a uniform and dense structure, improving the mechanical properties of the composite layer and enhancing its bonding effect with the concrete beam 10.

[0050] For example, an epoxy resin layer is provided between the concrete beam 10 and the fiber-reinforced resin composite layer 20. The epoxy resin layer and the surface of the concrete beam 10 form a continuous interface through mechanical interlocking, and after curing, form a three-dimensional network structure with chemical cross-linking. The epoxy resin layer forms an anchoring effect by penetrating the microcracks on the concrete surface, and at the same time forms a chemical bond with the fiber-reinforced resin composite layer 20, so that the shear stress generated by external loads is uniformly transferred to the reinforcement layer through the continuous interface, avoiding interface delamination failure caused by stress concentration. The dense film formed by the epoxy resin layer can also prevent moisture and chloride ions from penetrating to the interface between the concrete and the reinforcement layer, slowing down the degradation of bonding performance caused by environmental erosion, thereby ensuring that the reinforced structure maintains stable load-bearing performance throughout its entire life cycle. The epoxy resin layer effectively improves the interfacial bonding state between the fiber-reinforced resin composite layer 20 and the concrete beam 10.

[0051] Specifically, such as Figure 1 and Figure 2 As shown, there are multiple connectors 30, which are spaced apart along the length of the concrete beam 10. The support portion 31 of each connector 30 abuts against the bottom of the fiber-reinforced resin composite layer 20, and the two connecting portions 32 of each connector 30 are connected to the opposite side walls of the concrete beam 10. The multiple connectors 30 spaced apart along the length of the concrete beam 10 form uniformly distributed support points at the bottom of the fiber-reinforced resin composite layer 20. The external load borne by the composite layer is decomposed into multiple local loads, which are transmitted to the connecting portions 32 of each connector 30 through the support portion 31. When the connecting portions 32 are fixed to the side walls of the concrete beam 10, the load is further dispersed longitudinally along the beam, avoiding stress concentration at a single point.

[0052] The above technical solution effectively improves the synergistic load-bearing performance between the fiber-reinforced resin composite layer 20 and the concrete beam 10. Multiple spaced connectors 30 form a distributed support system, ensuring that the composite layer load is evenly transferred to the concrete structure along the beam's length, eliminating interfacial shear stress concentration caused by single-point support. The symmetrical anchoring design of the double connection parts 32 enhances the torsional resistance of the connectors 30, preventing lateral slippage of the composite layer under bending conditions. This structure significantly reduces the risk of interfacial delamination, ensuring the durability of the reinforcement system under long-term dynamic loads, while also allowing for flexible adjustment of the connector 30 arrangement density during construction based on the degree of beam damage.

[0053] In practical applications, both connecting parts 32 are provided with through holes 321, and two opposite sidewalls of the concrete beam 10 are provided with fixing holes. The through holes 321 correspond to the fixing holes and are connected by fasteners 40. The through holes 321 can be configured as through holes, and the fixing holes can be pre-embedded inside the sidewalls of the concrete beam 10, forming a coaxial correspondence with the through holes 321. The fasteners 40 can be expansion bolts and nuts, and the bolt length must meet the requirement of penetrating the connecting part 32 and embedding into the fixing hole. The width-direction extension relationship between the support part 31 and the fiber-reinforced resin composite layer 20 ensures that the connecting part 32 forms a constraint force perpendicular to the beam axis after fastening.

[0054] The above technical solution achieves precise mechanical anchoring between connector 30 and concrete beam 10, effectively eliminating the slippage risk associated with traditional bonding methods. The frictional effect generated by the bolt preload and the mechanical interlocking effect work synergistically to significantly improve the interface's shear resistance. The hole gap design allows for minor installation errors during construction, while the epoxy adhesive layer ensures uniform stress transfer, ultimately forming a composite connection system that combines positioning accuracy and load-bearing reliability.

[0055] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A hybrid FRP chopped fiber reinforced resinous glue reinforced concrete beam structure, characterized by, The application relates to a concrete beam, comprising: a concrete beam; a fiber-reinforced resin composite layer arranged at the bottom of the concrete beam, the fiber-reinforced resin composite layer being formed by compounding a fiber material and a resin material; a connecting piece comprising a supporting part and two connecting parts, the supporting part extending along the width direction of the fiber-reinforced resin composite layer, the supporting part abutting against the bottom of the fiber-reinforced resin composite layer, the two connecting parts being respectively connected to the two ends of the supporting part and extending upwards, and the two connecting parts being respectively connected to the opposite side walls of the concrete beam.

2. The hybrid FRP chopped fiber reinforced resinous glue reinforced concrete beam structure according to claim 1, wherein The fiber material comprises glass fibers, and the resin material comprises epoxy resin.

3. The hybrid FRP short fiber reinforced resin mortar reinforced concrete beam structure according to claim 2, wherein The length of the glass fibers is 35-50 mm.

4. The hybrid FRP short fiber reinforced resin mortar reinforced concrete beam structure according to claim 2, wherein The volume fraction of the fiber material in the fiber-reinforced resin composite layer is 10-20%.

5. The hybrid FRP chopped fiber reinforced resinous glue reinforced concrete beam structure according to claim 1, wherein An epoxy resin layer is arranged between the concrete beam and the fiber-reinforced resin composite layer.

6. The hybrid FRP chopped fiber reinforced resinous glue reinforced concrete beam structure according to claim 1, wherein The number of the connecting pieces is plural, the plural connecting pieces are arranged at intervals along the length direction of the concrete beam, the supporting part of each connecting piece abuts against the bottom of the fiber-reinforced resin composite layer, and the two connecting parts of each connecting piece are connected to the opposite side walls of the concrete beam.

7. The hybrid FRP short-cut fiber reinforced resin glue consolidated concrete beam structure according to claim 1, wherein The two connecting parts are provided with through holes, the two opposite side walls of the concrete beam are provided with fixing holes, the through holes correspond to the fixing holes, and the through holes and the fixing holes are connected through fasteners.

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