Reinforcing and implementing device and method for steel pipes in steel structure grid
By wrapping carbon fiber tape around the steel pipes of the steel structure space frame and applying epoxy resin adhesive, the problems of corrosion and deformation of the steel structure space frame during use are solved. This achieves a reinforcement effect without increasing the self-weight, improves the load-bearing capacity and stability, and maintains rapid construction and aesthetic appearance.
Patent Information
- Application Number
- CN202511463411.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2025-11-28
AI Technical Summary
Existing steel space frames suffer from problems such as corrosion, deformation, and excessive deflection of members after long-term use. Conventional reinforcement methods increase self-weight, have poor welding safety, and have poor appearance.
The steel pipe is reinforced by wrapping carbon fiber tape around its outer surface and applying epoxy resin adhesive. The bending and compressive strength of the steel pipe is enhanced by cross-spiral and circumferential winding.
It achieves reinforcement without increasing the structure's self-weight, improves load-bearing capacity and stability, and is quick to construct, reliable in quality, and aesthetically pleasing.
Smart Images
Figure CN121024371A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of reinforcement of space frame structures, specifically to a device and method for reinforcing steel pipes in a steel space frame structure. Background Technology
[0002] Steel space frame structures are an important structural form widely used in large-scale buildings and facilities. They have advantages such as factory prefabrication, on-site installation, and convenient construction, and are widely used in large and medium-sized public buildings such as stadiums and exhibition halls. However, after long-term use, steel space frame structures may experience issues such as corrosion, deformation, and excessive deflection of the members, affecting their usability. Therefore, reinforcement of steel space frame structures is often necessary. Conventional reinforcement methods mainly include member replacement, sleeve reinforcement, and adding supports. Member reinforcement is carried out when the building is already in use. Welding of the steel structure has a significant impact on the safety of the existing structure. After reinforcement, the original structure is increased in self-weight, and the appearance is also poor.
[0003] Therefore, how to provide a device and method for reinforcing and implementing steel pipes in steel structure space frames has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0004] The purpose of this invention is to design a device and method for reinforcing steel pipes in a steel structure space frame, which can solve the problems of increased self-weight after reinforcement of steel structure space frames and safety issues caused by welding during the reinforcement process.
[0005] To achieve the above objectives, the present invention provides a device for reinforcing and implementing steel pipes in a steel structure space frame, comprising: a steel pipe body, wherein a first carbon fiber strip is wound around the outer surface of the steel pipe body, a second carbon fiber strip is wound around the surface of the first carbon fiber strip, and epoxy resin adhesive is coated on the second carbon fiber strip.
[0006] Furthermore, the first carbon fiber tape uses unidirectional 3K carbon fiber filaments with a width of 2mm and a tensile strength of 4000MPa.
[0007] Furthermore, the first carbon fiber strip is wound around the outer surface of the steel pipe body in a cross-spiral winding manner, and a certain initial force is applied to the first carbon fiber strip during winding.
[0008] Furthermore, the second carbon fiber strip is wound around the outer surface of the first carbon fiber strip in a circumferential manner.
[0009] Furthermore, the first carbon fiber strip and the second carbon fiber strip are evenly wrapped around the entire surface of the steel pipe body without leaving any gaps, and the wrapping covers the entire steel pipe body.
[0010] Furthermore, the first carbon fiber strip and the second carbon fiber strip are wound together in one or more layers as needed for reinforcement.
[0011] Furthermore, epoxy resin is applied to the outer surface of the steel pipe body.
[0012] A method for reinforcing and implementing steel pipes in a steel structure space frame includes the following steps: The first step is to remove rust and polish the surface of the steel pipe to expose its metallic luster; The second step is to coat the outer surface of the steel pipe with epoxy resin adhesive. The third step is to wrap a 2mm wide first carbon fiber strip around the surface of the steel pipe body. The wrapping method is cross spiral wrapping. During the wrapping, the first carbon fiber strip is evenly wrapped around the entire surface of the steel pipe body, and a certain initial force is applied to the first carbon fiber strip. After wrapping, the first carbon fiber strip covers the entire steel pipe body. Step 4: Apply epoxy resin adhesive to the surface of the wound carbon fiber tape 2; Step 5: Wrap the second carbon fiber strip 3 around the surface of the carbon fiber strip 2, which has been coated with epoxy resin, using a circumferential winding method, as shown in the attached figure. Figure 3 As shown, during the winding process, the second carbon fiber tape 3 is evenly wound around the entire surface of the steel pipe, and after winding, the second carbon fiber tape 3 covers the entire steel pipe body 1. Step 6: Apply epoxy resin adhesive 4 to the surface of the second carbon fiber strip 3 wrapped around the outer surface of the steel pipe body 1 and cure it.
[0013] The beneficial effects of this invention are as follows: This invention does not increase the structural weight and is suitable for strengthening existing steel structure space frames. It can effectively improve the load-bearing capacity and stability of steel structures. No welding is required during the entire strengthening process. The structure is lightweight and has a good appearance after strengthening. It also has the advantages of rapid construction, short construction period and easy quality assurance. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram illustrating the cross-spiral winding method of the carbon fiber tape in this invention; Figure 3 This is a diagram showing the circumferential winding method of the carbon fiber tape according to the present invention.
[0015] In the diagram: 1-steel pipe body, 2-first carbon fiber strip, 3-second carbon fiber strip, 4-epoxy resin adhesive. Detailed Implementation
[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0018] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0021] See Figure 1-3 This embodiment provides a device for reinforcing and implementing steel pipes in a steel structure space frame, including: a steel pipe body 1, a first carbon fiber strip 2 wrapped around the outer surface of the steel pipe body 1, a second carbon fiber strip 3 wrapped around the surface of the first carbon fiber strip 2, and an epoxy resin adhesive 4 coated on the second carbon fiber strip 3.
[0022] To further optimize the technical solution, the first carbon fiber strip 2 uses unidirectional 3K carbon fiber filaments with a width of 2mm and a tensile strength of 4000MPa. The 1K carbon fiber filaments are 1mm wide, but require multiple windings during actual construction, making construction inconvenient. The 6K carbon fiber filaments are 5mm wide, which is too wide and provides only a moderate reinforcement effect. Therefore, 2mm wide 3K carbon fiber filaments are used.
[0023] To further optimize the technical solution, the first carbon fiber tape 2 is wound around the outer surface of the steel pipe body 1 in a cross-spiral winding manner, as shown in the attached figure. Figure 2 As shown, a certain initial force is applied to the first carbon fiber strip 2 during winding. The main reason for adopting the cross-winding method is to apply a certain axial pressure to the steel pipe to be reinforced by cross-winding the first carbon fiber strip 2, thereby increasing the bending resistance of the steel pipe body 1. At the same time, the cross-winding method can maximize the contact area between the first carbon fiber strip 2 and the steel pipe body 1, so that the first carbon fiber strip 2 forms a whole and shares the force.
[0024] To further optimize the technical solution, the second carbon fiber strip 3 is wound around the outer surface of the first carbon fiber strip 2 in a circumferential manner, as shown in the attached figure. Figure 3 As shown. There are two main reasons for further circumferential winding of the second carbon fiber strip 3 onto the surface of the first cross-wound carbon fiber strip 2. First, it provides a circumferential clamping effect to the first carbon fiber strip 2, making the bond between the first carbon fiber strip 2 and the reinforcing steel pipe stronger and preventing loosening or peeling due to adhesive aging. Second, after winding the first carbon fiber strip 2, adhesive needs to be applied again. Wrapping the second carbon fiber strip 3 circumferentially after applying the adhesive increases the adhesion between the first and second carbon fiber strips 2 and 3, and the circumferential winding also improves the compressive strength of the steel pipe to a certain extent.
[0025] The technical solution is further optimized by uniformly wrapping the first carbon fiber strip 2 and the second carbon fiber strip 3 around the entire surface of the steel pipe body 1 without leaving gaps, and covering the entire steel pipe body 1 after wrapping.
[0026] To further optimize the technical solution, the first carbon fiber strip 2 and the second carbon fiber strip 3 are wrapped together one or more times as needed for reinforcement. Depending on the actual stress requirements of the steel pipe and the different levels of stress performance improvement required, one or more layers can be wrapped; the more layers, the higher the stress performance improvement of the steel pipe.
[0027] To further optimize the technical solution, epoxy resin adhesive is applied to the outer surface of the steel pipe body 1.
[0028] This invention also provides a method for reinforcing steel pipes in a steel structure space frame, comprising the following steps: The first step is to remove rust and polish the surface of the steel pipe body 1 to expose the metallic luster; The second step is to coat the outer surface of the steel pipe body 1 with epoxy resin adhesive. The third step involves wrapping a 2mm wide first carbon fiber strip 2 around the surface of the steel pipe body 1. The wrapping method is a cross-spiral winding, as shown in the attached diagram. Figure 2 As shown, during the winding process, the first carbon fiber strip 2 is evenly wound around the entire surface of the steel pipe body 1, and a certain initial force is applied to the first carbon fiber strip 2. After winding, the first carbon fiber strip 2 covers the entire steel pipe body 1. Step 4: Apply epoxy resin adhesive to the surface of the wound carbon fiber tape 2; Step 5: Wrap the second carbon fiber strip 3 around the surface of the carbon fiber strip 2, which has been coated with epoxy resin, using a circumferential winding method, as shown in the attached figure. Figure 3 As shown, during the winding process, the second carbon fiber tape 3 is evenly wound around the entire surface of the steel pipe, and after winding, the second carbon fiber tape 3 covers the entire steel pipe body 1. Step 6: Apply epoxy resin adhesive 4 to the surface of the second carbon fiber strip 3 wrapped around the outer surface of the steel pipe body 1 and cure it.
[0029] The third, fourth, and fifth steps can involve wrapping one or more layers depending on the reinforcement requirements.
[0030] This invention does not increase the structural weight and is suitable for strengthening existing steel structure space frames. It can effectively improve the load-bearing capacity and stability of steel structures. No welding is required during the entire strengthening process. The structure is lightweight and has a good appearance after strengthening. It also has the advantages of rapid construction, short construction period and easy quality assurance.
[0031] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.
Claims
1. A device for reinforcing and implementing steel pipes in a steel structure space frame, characterized in that, include: The steel pipe body (1) has a first carbon fiber strip (2) wrapped around its outer surface, a second carbon fiber strip (3) wrapped around its surface, and an epoxy resin adhesive (4) coated on its second carbon fiber strip (3).
2. The device for reinforcing and implementing steel pipes in a steel structure space frame as described in claim 1, characterized in that, The first carbon fiber tape (2) is made of unidirectional 3K carbon fiber filament with a width of 2mm and a tensile strength of 4000MPa.
3. The device for reinforcing and implementing steel pipes in a steel structure space frame as described in claim 2, characterized in that, The first carbon fiber strip (2) is wound around the outer surface of the steel pipe body (1) in a cross spiral winding manner, and a certain initial force is applied to the first carbon fiber strip (2) during winding.
4. The device for reinforcing and implementing steel pipes in a steel structure space frame as described in claim 3, characterized in that, The second carbon fiber strip (3) is wound around the outer surface of the first carbon fiber strip (2) in a circumferential manner.
5. The device for reinforcing and implementing steel pipes in a steel structure space frame as described in claim 4, characterized in that, The first carbon fiber strip (2) and the second carbon fiber strip (3) are evenly wrapped around the entire surface of the steel pipe body (1) without leaving gaps, and after wrapping, they cover the entire steel pipe body (1).
6. The device for reinforcing and implementing steel pipes in a steel structure space frame as described in claim 5, characterized in that, The first carbon fiber strip (2) and the second carbon fiber strip (3) are wrapped together in one or more layers as needed for reinforcement.
7. The device for reinforcing and implementing steel pipes in a steel structure space frame as described in claim 1 or 6, characterized in that, The outer surface of the steel pipe body (1) is coated with epoxy resin adhesive.
8. A method for reinforcing steel pipes in a steel structure space frame, characterized in that, Includes the following steps: The first step is to remove rust and polish the surface of the steel pipe body (1) to expose the metallic luster; The second step is to coat the outer surface of the steel pipe body (1) with epoxy resin adhesive. The third step is to wrap a 2mm wide first carbon fiber strip (2) around the surface of the steel pipe body (1). The wrapping method is cross spiral wrapping. When wrapping, the first carbon fiber strip (2) wraps evenly around the entire surface of the steel pipe body (1) and applies a certain initial force to the first carbon fiber strip (2). After wrapping, the first carbon fiber strip (2) covers the entire steel pipe body (1). Fourth step, apply epoxy resin adhesive (4) to the surface of the first carbon fiber tape (2) that has been wound. Fifth step, wrap the second carbon fiber tape (3) again on the surface of the first carbon fiber tape (2) that has been coated with epoxy resin adhesive (4). The wrapping method is circumferential wrapping. When wrapping, the second carbon fiber tape (3) is evenly wrapped around the entire surface of the steel pipe. After wrapping, the second carbon fiber tape (3) covers the entire steel pipe body (1). Step 6: Apply epoxy resin adhesive (4) to the surface of the second carbon fiber strip (3) wrapped around the outer surface of the steel pipe body (1) and cure it.