Glass fiber composite rib

Abstract

The utility model discloses a glass fiber composite rib which comprises a middle core rod, a first fiber layer wound outside the middle core rod, a second winding layer wound outside the first winding layer, a fiber layer clamped between the first winding layer and the second winding layer, and an outer structure layer arranged outside the second winding layer, the first winding layer is composed of a plurality of glass fiber mixed epoxy resin which is spirally and tightly wound on the outer surface of the middle core rod, and the first winding layer and the middle core rod are fixedly connected into a whole through the epoxy resin; the fiber layer is an annular layer formed by mixing a plurality of glass fibers which are arranged at the same time with epoxy resin, and the glass fibers in the annular layer are arranged in the axial direction of the center core. The composite rib is light in weight and corrosion-resistant, and is beneficial to improving the durability and safety of an engineering structure, reducing the maintenance and operation cost and promoting the technical innovation and development in the fields of buildings and civil engineering.

Description

Technical Field

[0001] This application relates to the field of building materials, and particularly to a glass fiber composite bar. Background Art

[0002] In the existing fields of architecture and civil engineering, reinforced concrete structures are widely adopted due to their excellent mechanical properties and economy. As the main reinforcing material for concrete, steel bars can effectively bear tensile stress, providing the necessary tensile strength and ductility, thus making up for the deficiency of poor tensile performance of concrete. Steel bars and concrete work together through good bonding force, enabling the structure to withstand complex loads and environmental conditions. However, there are also some deficiencies in the steel bar material itself that cannot be ignored, which limit its application in some special environments and conditions.

[0003] First of all, the problem of easy corrosion of steel bars is very prominent. In humid, salty or chemically corrosive environments, such as coastal areas, industrial waste gas emission areas, and roads and bridges using deicing salts, electrochemical corrosion reactions are likely to occur on the surface of steel bars, resulting in rust. The corrosion of steel bars will produce oxides with a volume several times larger than the original metal, leading to volume expansion. This expansion exerted on the surrounding concrete will cause an increase in internal stress, ultimately resulting in concrete cracking, spalling or peeling. The cracks in the concrete will further accelerate the intrusion of corrosive media, forming a vicious cycle, seriously weakening the durability and load-bearing capacity of the structure, and shortening the service life. To prevent the corrosion of steel bars, additional protective measures need to be taken, such as increasing the thickness of the concrete cover to extend the time for corrosive media to reach the steel bars; or coating the surface of the steel bars with anti-corrosion coatings such as epoxy resin to block the contact with corrosive media. These measures not only increase the material and construction costs, but may also affect the construction progress and increase the construction difficulty.

[0004] Secondly, the self-weight of steel bars is relatively large, and its density is about 7.85 g / cm³. In large bridges, high-rise buildings and other structures sensitive to self-weight, the extensive use of steel bars will significantly increase the overall load of the structure. This additional weight requires a stronger foundation and support structure, increasing the project cost and design complexity. At the same time, the large self-weight is not conducive to the realization of lightweight design of the structure, restricting the performance of the structure in some special applications. In addition, the high density of steel bars also poses challenges to transportation and installation. During transportation, more energy and costs are required; at the construction site, the weight of the steel bars increases the installation difficulty, requiring more powerful lifting equipment and more labor, which may lead to a reduction in construction efficiency and an increase in safety risks.

[0005] Secondly, steel bars have magnetic permeability and electrical conductivity, which may bring adverse effects in some special occasions. In a strong magnetic field environment, such as near a magnetic resonance imaging (MRI) room, a particle accelerator facility, or a high-voltage transmission line, the magnetic permeability of steel bars may interfere with the normal operation of equipment, affect the measurement accuracy of precision instruments, and even endanger the safety of equipment and personnel. At the same time, in facilities where electromagnetic interference needs to be avoided, such as communication base stations, radar stations, and sensitive electronic equipment manufacturing workshops, steel bars may become a source or amplifier of electromagnetic interference, affecting the reliability of the system. The electrical conductivity of steel bars may also pose safety hazards in the event of lightning strikes. The steel bar structure may become a channel for lightning current, causing current concentration, generating high temperatures and sparks, which may trigger fires or damage the structure. To solve these problems, additional protective measures are usually required, such as installing a lightning protection system, using electromagnetic shielding materials, or designing special grounding schemes, but this will further increase the complexity and cost of the project.

[0006] In view of the above problems of steel bars in terms of corrosion, self-weight, magnetic permeability, and electrical conductivity, it is particularly necessary to seek a new type of reinforcing material with excellent performance. An ideal alternative material should have corrosion resistance and be able to be used in harsh environments for a long time without reducing the structural performance; it should have the characteristics of light weight and high strength to reduce the self-weight of the structure and improve the economy and sustainability of the project; at the same time, it should be a non-magnetic and non-conductive material to meet the requirements for electromagnetic performance in special environments. Utility Model Content

[0007] The purpose of this application is to at least overcome one deficiency existing in the prior art, and to provide a glass fiber composite bar. This composite bar is light in weight and corrosion-resistant, which will help improve the durability and safety of engineering structures, reduce maintenance and operation costs, and promote technological innovation and development in the fields of architecture and civil engineering.

[0008] To achieve the above object, the present application discloses a glass fiber composite bar, which includes a core rod, a first fiber layer wound around the core rod, a second winding layer wound around the first winding layer, a fiber layer sandwiched between the first winding layer and the second winding layer, and an outer structure layer disposed outside the second winding layer. Among them, the first winding layer is composed of glass fibers helically wound tightly around the outer surface of the core rod and mixed with epoxy resin, and the first winding layer is integrally fixed to the core rod through epoxy resin; the fiber layer is composed of a number of glass fibers arranged in the same way and mixed with epoxy resin to form an annular layer, and the glass fibers in the annular layer are arranged along the central core axis; the glass fibers in the fiber layer are adhesively formed through epoxy resin to form the fiber layer, and the fiber layer is integrally fixed to the first winding layer through epoxy resin; the second winding layer is composed of a number of glass fibers helically wound tightly around the fiber layer, and the second fiber layer is wound at intervals and encrypted to form a helical protrusion. The glass fibers in the second winding layer are adhesively formed through epoxy resin, and the second winding layer is integrally fixed to the fiber layer through epoxy resin; the outer structure layer is composed of a number of layers of glass fiber cloth helically wound tightly around the second winding layer. The glass fiber cloths in the outer structure layer are adhesively formed through epoxy resin, and the outer structure layer is integrally fixed to the second winding layer through epoxy resin.

[0009] In some embodiments, the glass fibers in the first winding layer and the second winding layer are wound in alternating positive and negative helices.

[0010] In some embodiments, the glass fiber cloth in the outer structure layer is wrapped by epoxy resin.

[0011] In some embodiments, the outer surface of the epoxy resin after hardening on the outer surface of the outer structure layer is a rough surface with concavities and convexities.

[0012] Compared with the prior art, the present application has at least the following beneficial effects:

[0013] 1. Excellent corrosion resistance: The glass fiber composite bar is composed of glass fiber and epoxy resin, with excellent corrosion resistance. It can be used for a long time in humid, salty or chemically corrosive environments, and will not rust like steel bars, avoiding problems such as concrete cracking and spalling, improving the durability of the structure, and reducing the maintenance cost. Corresponding to the problem that steel bars are prone to corrosion in the background art.

[0014] 2. Light weight and high strength: The density of the glass fiber composite bar is lower than that of steel bars, reducing the self-weight of the structure, lowering the design requirements for the foundation and support structure, facilitating the lightweight design of the structure, and reducing the engineering cost and design complexity. Corresponding to the problem that the self-weight of steel bars is relatively large in the background art.

[0015] 3. Non-magnetic and non-conductive: Glass fiber composite bars do not have magnetic conductivity or electrical conductivity, avoiding the adverse effects caused by the magnetic conductivity and electrical conductivity of steel bars in strong magnetic fields or environments where electromagnetic interference needs to be prevented, ensuring the normal operation of equipment and the reliability of the system, and reducing potential safety hazards. This addresses the problems caused by the magnetic conductivity and electrical conductivity of steel bars in the background art.

[0016] 4. Convenient construction and cost reduction: Due to the light weight of glass fiber composite bars, they are easy to transport and install, reducing construction difficulty and the need for large lifting equipment, improving construction efficiency, and reducing construction safety risks and costs. This addresses the challenges posed by the heavy weight of steel bars to transportation and installation in the background art.

[0017] The beneficial effects listed above do not exhaust all the advantages. Other potential beneficial effects and detailed technical implementation details will be further revealed in the embodiments or other descriptive parts of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] After reading the following detailed implementation manners in conjunction with the accompanying drawings, various aspects of the present disclosure will be better understood. In the drawings, the positions, sizes, and ranges of various structures shown sometimes do not represent actual positions, sizes, and ranges, etc. In the drawings:

[0019] Figure 1 is a schematic structural diagram of an embodiment disclosed in this application.

[0020] Figure 2 is a schematic structural diagram of an embodiment disclosed in this application from another perspective. DETAILED IMPLEMENTATION MANNERS

[0021] The following will describe the present disclosure with reference to the accompanying drawings, in which several embodiments of the present disclosure are shown. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and to fully explain the protection scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0022] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, for clarity, the sizes of some features may be deformed.

[0023] It should be understood that the terms used in the specification are only for describing specific embodiments and are not intended to limit the present disclosure. All terms used in the specification (including technical terms and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification.

[0024] The singular forms “a”, “the”, and “said” used in the specification include the plural forms unless clearly specified. The terms “including”, “comprising”, and “containing” used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term “and / or” used in the specification includes any and all combinations of one or more of the related listed items. Embodiment

[0025] Such as Figure 1 、 2 As shown, this embodiment provides a glass fiber composite bar, aiming to replace traditional steel bars and solve their deficiencies in aspects such as corrosion, self-weight, magnetic conductivity, and electrical conductivity.

[0026] In terms of the specific structure, the composite bar sequentially includes a core rod 1, a first winding layer 2, a fiber layer 3, a second winding layer 4, and an outer structure layer 5 from the inside to the outside. Each part is bonded and cured by epoxy resin to form an integral structure, ensuring that the composite bar has excellent mechanical properties and durability under stress conditions.

[0027] In this embodiment, the core rod 1, as a support during the production process of the composite bar, is made of a polymer fiber rod, such as a polyethylene or polypropylene fiber rod. Its main function is to provide axial support and positioning during the forming process of the composite bar, ensuring the accurate arrangement and winding of each layer of materials. Due to the characteristics of the polymer fiber material, such as light weight, high toughness, and corrosion resistance, the core rod will not have an adverse impact on the self-weight and durability of the composite bar. At the same time, the core rod 1 also participates in the main stress of the composite bar during use.

[0028] Closely adhering to the outer surface of the core rod 1, the first winding layer 2 is wound. The first winding layer 2 is tightly wound by glass fibers impregnated with epoxy resin in a spiral manner, and the winding directions are alternately clockwise and counterclockwise, and the winding angle is usually between 30 and 45 degrees. The main function of this layer is to provide the composite bar with initial radial strength and anti-torsion ability. When the composite bar is subjected to bending or torsional loads, the first winding layer 2 can effectively resist radial shear forces and torques, prevent the structure from undergoing lateral deformation, and protect the internal fiber layer 3 from external force damage.

[0029] Outside the first winding layer 2, a fiber layer 3 is provided. The fiber layer 3 is composed of glass fibers arranged along the axial direction of the composite bar, forming an annular layer. The glass fibers of the fiber layer 3 are cured after being impregnated with epoxy resin and are tightly bonded to the first winding layer 2 as a whole. The fiber layer 3 is the main load-bearing layer of the composite bar, undertaking the axial tensile load. When the composite bar is subjected to tensile force during use, the glass fibers in the fiber layer 3 are stressed axially, giving full play to their characteristics of high strength and high modulus, and providing the main tensile strength for the composite bar. This is of great significance for structures that need to bear large tensile loads, such as prestressed concrete components.

[0030] The second winding layer 4 is wound outside the fiber layer 3. The second winding layer 4 is formed by helically winding glass fibers impregnated with epoxy resin in an alternating clockwise and counterclockwise direction, and the winding angle is the same as that of the first winding layer 2. This layer adopts an intermittent and dense winding method to form a helical convex structure 6. The main functions of the second winding layer 4 include balancing torque and enhancing the bonding force. It cooperates with the first winding layer 2 to enhance the torsional stability of the composite bar. At the same time, the helical protrusions 6 increase the surface area of the composite bar, forming a stronger mechanical biting force with the concrete, preventing the composite bar from slipping in the concrete, and improving the integrity of the structure. In bridge construction, this design can effectively prevent the displacement of steel bars under load and ensure the safety of the bridge.

[0031] The outermost layer is the outer structure layer 5, which is formed by helically winding several layers of glass fiber cloth impregnated with epoxy resin and completely covers the outside of the second winding layer 4. After the epoxy resin is cured, a rough surface with concavities and convexities is formed on the surface of the outer structure layer 5. This design helps to protect the internal structure from being eroded by moisture, chemical substances, etc. in the environment and enhances the corrosion resistance of the composite bar. At the same time, the rough outer surface improves the bonding performance between the composite bar and the concrete, ensuring stress transfer during loading. In ocean engineering, the outer structure layer can effectively resist the erosion of chloride ions in seawater and extend the service life of the structure.

[0032] In practical applications, such as in the construction of bridges or wharves in coastal areas, traditional steel bars are easily affected by corrosive substances in seawater, resulting in a shortened structure life. Using the glass fiber composite bar of this embodiment has excellent corrosion resistance, can resist the erosion of the marine environment for a long time, and reduces the maintenance cost. At the same time, the lightweight characteristic of the composite bar significantly reduces the self-weight of the structure, reduces the requirements for the foundation and support structure, and saves the project cost. In high-rise building construction, using this composite bar can reduce the weight of floors and beams, facilitate transportation and installation, reduce the dependence on large lifting equipment, and improve the construction efficiency.

[0033] When the composite bar bears the load, the functions of each layer are specifically manifested as follows: The core rod 1 provides support and positioning during the manufacturing process and also participates in the force-bearing; the first winding layer 2 resists radial shear forces and preliminary torsional forces, protecting the fiber layer 3 from lateral deformation; the fiber layer 3, as the main force-bearing layer, bears axial tensile loads and provides the main tensile strength of the composite bar; the second winding layer 4, like the first winding layer 2, provides radial structural strength, and at the same time enhances the mechanical bonding force with the concrete through spiral protrusions to resist pull-out and slip; the outer structural layer 5 protects the internal structure from environmental erosion, and the rough surface enhances the bonding performance with the concrete.

[0034] The entire composite bar is firmly bonded together through the curing of epoxy resin to form an integral structure. During the manufacturing process, the glass fibers of each layer are wound or laid after being impregnated with epoxy resin. After the overall shaping, a curing treatment is carried out to ensure that the epoxy resin is fully hardened, endowing the composite bar with excellent mechanical properties and durability.

[0035] In addition, the non-magnetic and non-conductive characteristics of the composite bar make it have unique application value in places with special requirements for the electromagnetic environment. For example, in the magnetic resonance imaging room of a hospital or the production workshop of precision electronic equipment, the use of this composite bar can avoid the electromagnetic interference caused by the magnetic conductivity and conductivity of traditional steel bars, ensuring the normal operation of the equipment and the safety of personnel.

[0036] In summary, the glass fiber composite bar of this embodiment gives full play to the advantages of glass fiber and epoxy resin through reasonable structural design and material selection, and overcomes the defects of traditional steel bars. It has a wide range of application prospects in various engineering environments, especially in corrosive environments, weight-sensitive structures, and special electromagnetic environments.

[0037] Although the exemplary embodiments of the present disclosure have been described, those skilled in the art should understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and equivalents of these claims are also included.

Claims

1. A glass fiber composite bar, characterized in that, The composite reinforcement bar comprises: a central core rod, a first fiber layer wound around the central core rod, a second winding layer wound around the first winding layer, a fiber layer sandwiched between the first winding layer and the second winding layer, and an outer structure layer provided outside the second winding layer. Among them, the first winding layer is composed of a plurality of glass fibers tightly wound around the surface of the central core rod in a spiral manner and mixed with epoxy resin, and the first winding layer is integrally fixed to the central core rod through epoxy resin; the fiber layer is composed of a plurality of glass fibers arranged in the same way and mixed with epoxy resin to form an annular layer, and the glass fibers in the annular layer are arranged along the central core axis; each glass fiber in the fiber layer is adhesively formed through epoxy resin to form the fiber layer, and the fiber layer is integrally fixed to the first winding layer through epoxy resin; the second winding layer is composed of a plurality of glass fibers tightly wound around the fiber layer in a spiral manner, and the second fiber layer is wound at intervals and encrypted to form a spiral protrusion. The glass fibers in the second winding layer are adhesively formed through epoxy resin, and the second winding layer is integrally fixed to the fiber layer through epoxy resin; the outer structure layer is composed of a plurality of layers of glass fiber cloths tightly wound around the second winding layer in a spiral manner. The glass fiber cloths in the outer structure layer are adhesively formed through epoxy resin, and the outer structure layer is integrally fixed to the second winding layer through epoxy resin.

2. The glass fiber composite bar according to claim 1, wherein: The glass fibers in the first winding layer and the second winding layer are wound in alternating positive and negative spirals.

3. A glass fiber composite rib as described in claim 1, characterized in that: The glass fiber cloth in the outer structure layer is wrapped by epoxy resin.

4. A glass fiber composite bar as described in claim 1, characterized in that: The outer surface of the epoxy resin after hardening on the outer surface of the outer structure layer is a rough surface with concavities and convexities.

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