Frp pultrusion profile prefabricated connection joint

Abstract

This invention discloses a prefabricated connection node for FRP pultruded profiles, comprising an FRP pultruded profile component and prefabricated connectors. The prefabricated connectors are adapted to and assembled with the FRP pultruded profile component. The prefabricated connectors are used to bear the load of the FRP pultruded profile prefabricated connection node and transfer the load. This invention has advantages such as high load-bearing capacity, good durability, and convenient on-site construction.

Description

Technical Field

[0001] This invention relates to the field of FRP pultruded profile connection technology, and particularly to a prefabricated connection node for FRP pultruded profiles. Background Technology

[0002] In recent years, with the continuous development of composite materials and the ever-increasing demand for high-performance building structures, composite materials, represented by FRP pultruded profiles, are increasingly used in building structures. FRP (Fiber Reinforced Polymer) pultruded profiles are profile products manufactured using fiberglass, carbon fiber, basalt fiber, or other fibers as reinforcing materials and resins such as epoxy resin and isophthalic resin as matrix materials through a pultrusion molding process. Over decades of research and application, FRP pultruded profiles have been widely used in building structures such as bridges, cooling towers, and photovoltaic supports.

[0003] FRP pultruded profiles have advantages such as lightweight, high strength, and good durability, but they also have the disadvantage of significant anisotropy. Their transverse and shear strengths are much lower than their longitudinal strengths, making them prone to transverse or shear failure during use. Furthermore, the connection nodes of the structure need to withstand forces transmitted from various components, often operating under three-dimensional stress, resulting in complex stress distribution and unavoidable large transverse and shear loads, which is highly detrimental to pultruded profiles. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a prefabricated connection node for FRP pultruded profiles, which has high load-bearing capacity, good durability, and is easy to assemble.

[0005] The prefabricated connection node of FRP pultruded profile according to an embodiment of the present invention includes:

[0006] FRP pultruded profile components;

[0007] A prefabricated connector is adapted to and assembled with the FRP pultruded profile component. The prefabricated connector is used to bear the load applied to the prefabricated connection node of the FRP pultruded profile and to transfer the load.

[0008] The prefabricated FRP pultruded profile connection node of this invention designs the connection node of the pultruded profile component with complex stress independently, and uses the prefabricated connector to bear the node load. This effectively avoids the problem of low overall load-bearing capacity caused by the anisotropy of the FRP pultruded profile component and the complex stress in the node region, greatly improving the load-bearing capacity of the FRP pultruded profile connection node. The prefabricated FRP pultruded profile connection node of this invention can achieve all-composite material connection, meet the requirements of metal-free connection structures in special buildings, and has advantages such as good durability, high load-bearing capacity, and non-magnetic wave transmission. The prefabricated connector facilitates on-site construction, has good practicality and economy, and can be widely used in general FRP pultruded profile structures. The prefabricated FRP pultruded profile connection node of this invention is suitable for connection nodes between FRP pultruded profile components, such as beam-column connection nodes, and can be well applied to connection nodes in FRP pultruded profile structures, with broad application prospects.

[0009] In some embodiments, the prefabricated connector has a pre-reserved protruding connection portion, which is embedded and connected to the FRP pultruded profile component.

[0010] In some embodiments, the FRP pultruded profile is an I-shaped member, a tubular member, or a channel member, and the protruding connection is adapted to be located in the web portion of the I-shaped member, in the cavity of the tubular member, or in the web portion of the channel member.

[0011] In some embodiments, the FRP pultruded profile component and the extended connection are connected by bolts, adhesives, or a combination of adhesives and plugs.

[0012] In some embodiments, the prefabricated connector is made of all-composite materials.

[0013] In some embodiments, the prefabricated connector is made using a vacuum infusion process or a 3D printing process.

[0014] In some embodiments, the prefabricated connector is obtained by first fabricating an embedded part and then covering the embedded part with a vacuum injection process.

[0015] In some embodiments, the fabrication of the prefabricated connector is specifically as follows: first, FRP profile embedded parts are cut and spliced ​​to form an internal skeleton; at the same time, FRP pultruded profile rods are used to connect each FRP profile embedded part, and the protruding connecting parts are arranged to form the embedded part; then, the FRP pultruded profile rods and the FRP profile embedded parts are wrapped by a vacuum injection process, and appropriate anchoring is performed at the end of the protruding connecting part that is connected to the internal skeleton to obtain the prefabricated connector.

[0016] In some embodiments, the prefabricated connector is made of a metal material.

[0017] In some embodiments, the bolt is a metal bolt or a composite material bolt.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of a prefabricated connection node of an FRP pultruded profile according to an embodiment of the present invention, wherein the prefabricated connector is made by vacuum injection process;

[0021] Figure 2 This is a schematic diagram of a prefabricated connection node for an FRP pultruded profile according to another embodiment of the present invention, wherein the prefabricated connector is made by combining an embedded part with a vacuum injection process;

[0022] Figure 3 yes Figure 2 A schematic diagram of the embedded parts structure of the prefabricated connectors.

[0023] Figure Labels

[0024] FRP pultruded profile component 1; prefabricated connector 2; embedded part 201; extended connector 2011;

[0025] FRP profile embedded parts 2012; FRP pultruded profile bars 2013; Bolts 3. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following is combined with Figures 1 to 3 This invention describes the prefabricated connection node of FRP pultruded profiles in an embodiment of the present invention.

[0028] like Figures 1 to 3 As shown, the prefabricated connection node of FRP pultruded profile according to an embodiment of the present invention includes an FRP pultruded profile component 1 and a prefabricated connector 2.

[0029] Among them, FRP pultruded profile components 1 are generally composite material components made by combining commonly used fibers such as glass fiber, carbon fiber, and basalt fiber with corresponding resins through pultrusion molding process. They are common composite material products, and their cross-sectional shape, length and performance are selected according to structural requirements. They have high mechanical properties and significant anisotropy and are widely used in engineering structures.

[0030] Precast connector 2 is the core component of the precast connection node for FRP pultruded profiles. The structure and dimensions of precast connector 2 are determined by its own structural design. Precast connector 2 is fitted and assembled with FRP pultruded profile component 1. Precast connector 2 is used to bear the load of the FRP pultruded profile precast connection node and transfer the load. It is understandable that the structure and dimensions of precast connector 2 are determined by its own structural design, meaning that precast connector 2 needs to be carefully designed. This allows precast connector 2 to be fitted and assembled with FRP pultruded profile component 1, enabling FRP pultruded profile component 1 to bear relatively simple loads and fully utilize its excellent longitudinal mechanical properties. At the same time, the carefully designed precast connector 2 can bear the load of the FRP pultruded profile precast connection node and effectively transfer the load, avoiding failure modes with low load-bearing capacity, such as shear failure, that may occur with general connection methods. In addition, once the prefabricated connector 2 is designed, it can be mass-produced in the factory according to the type of the prefabricated connector 2, which facilitates the assembly and connection of the prefabricated connector 2 with the FRP pultruded profile component 1 on the construction site. It can realize functions such as detachability and replacement, and meet the needs of structural use.

[0031] The prefabricated FRP pultruded profile connection node of this invention designs the connection node of the pultruded profile component with complex stress independently, and uses prefabricated connector 2 to bear the node load. This can effectively avoid the problem of low overall load-bearing capacity caused by the anisotropy of the FRP pultruded profile component 1 and the complex stress in the node region, and greatly improve the load-bearing capacity of the FRP pultruded profile connection node. The prefabricated FRP pultruded profile connection node of this invention can realize the connection of all composite materials, can meet the requirements of metal-free connection structure in special buildings, and has the advantages of good durability, high load-bearing capacity, and non-magnetic wave transmission. The prefabricated FRP pultruded profile connection node of this invention uses prefabricated connector 2, which is convenient for on-site construction, has good practicality and economy, and can be widely used in general FRP pultruded profile structures. The prefabricated FRP pultruded profile connection node of this invention is suitable for connection nodes between FRP pultruded profile components 1, such as beam-column connection nodes, and can be well applied to connection nodes of FRP pultruded profile structures, with broad application prospects.

[0032] In some embodiments, the prefabricated connector 2 has a protruding connecting portion 2011, which is embedded and connected to the FRP pultruded profile component 1, thereby achieving a compatible splicing of the prefabricated connector 2 and the FRP pultruded profile component 1. For example, Figure 1 and Figure 2 As shown, the FRP pultruded profile member 1 is an I-shaped member with a web. Precast connectors 2, through two adjacent, unidirectionally extending connecting portions 2011, are fitted one-to-one with the sides of the web of each I-shaped member. Thus, the precast connectors 2 enable connections between FRP pultruded profile members 1, suitable for beam-to-beam, beam-to-column, and column-to-column connections, facilitating on-site assembly. The precast connectors 2 bear the load of the precast connection node of the FRP pultruded profile and transfer the load to other parts, fully utilizing the excellent longitudinal mechanical properties of the FRP pultruded profile member 1 and avoiding low-load-bearing-capacity failure modes such as shear failure that may occur with conventional connection methods. This embodiment of the FRP pultruded profile precast connection node has the advantages of high load-bearing capacity and convenient precast assembly.

[0033] In some embodiments, the FRP pultruded profile member 1 is an I-shaped member, a tubular member, or a channel member, with the protruding connecting portion 2011 adapted to be located in the web portion of the I-shaped member, in the cavity of the tubular member, or in the web portion of the channel member. Thus, the connection between FRP pultruded profile members 1 can be achieved through the prefabricated connector 2, suitable for beam-to-beam connections, beam-to-column connections, and column-to-column connections, facilitating on-site assembly. The prefabricated connector 2 bears the load of the prefabricated connection node of the FRP pultruded profile and performs the function of load transfer, fully utilizing the excellent longitudinal mechanical properties of the FRP pultruded profile member 1 and avoiding failure modes with low load-bearing capacity, such as shear failure, that may occur with general connection methods. This embodiment of the FRP pultruded profile prefabricated connection node has the advantages of high load-bearing capacity and convenient prefabrication and assembly.

[0034] It should be noted that the FRP pultruded profile component 1 is not limited to the above-mentioned I-shaped component, tubular component and U-shaped component, but can also be a component of other shapes.

[0035] In some embodiments, the FRP pultruded profile component 1 and the extended connector 2011 are connected by bolts, adhesives, or a combination of both. It should be explained that a bolted connection refers to using only bolts 3 to secure the FRP pultruded profile component 1 and the extended connector 2011 without using adhesives; an adhesive connection refers to using only adhesives to secure the FRP pultruded profile component 1 and the extended connector 2011 without using bolts 3; and a combination of both adhesives and bolts 3 is used to secure the FRP pultruded profile component 1 and the extended connector 2011. The fixed connection between the FRP pultruded profile component 1 and the extended connection part 2011 can be selected by bolt 3 connection, adhesive connection or mixed connection of adhesive and bolt according to actual needs, so as to realize the connection between the FRP pultruded profile component 1 and the extended connection part 2011 firmly and reliably, making the prefabricated connection node of FRP pultruded profile reliable and with high load-bearing capacity.

[0036] In some embodiments, the prefabricated connector 2 is made of all composite materials. Thus, when the connection between the prefabricated connector 2 and the FRP pultruded profile component 1 does not use metal bolts 3, the FRP pultruded profile prefabricated connection node of the present invention can meet the requirements of metal-free connection structure for special buildings, and has the advantages of good durability, high load-bearing capacity, and non-magnetic wave transmission.

[0037] In some embodiments, the prefabricated connector 2 is made by vacuum injection or 3D printing, which can be selected according to actual needs. It is easy to process and can be mass-produced.

[0038] In some embodiments, the prefabricated connector 2 is obtained by first fabricating an embedded part 201 and then covering the embedded part 201 with a vacuum injection process. Here, the embedded part 201 can serve as the internal load-bearing skeleton of the prefabricated connector 2, and is provided with an extended connecting part 2011 that is adapted to and spliced ​​with the FRP pultruded profile component 1. The embedded part 201 can be made of FRP ribs; then, it is vacuum injected with a mixture of fiber and resin to form a whole, ensuring that the various plates in the node area of ​​the prefabricated connector 2 can bear the load as a whole when under stress.

[0039] In some embodiments, the fabrication of the prefabricated connector 2 is specifically as follows: First, FRP profile embedded parts 2012 are cut and spliced ​​to form an internal skeleton. At the same time, FRP pultruded profile rods 2013 are used to connect each FRP profile embedded part 2012. While assembling the internal skeleton, protruding connecting parts 2011 (here, the protruding connecting parts 2011 are FRP protruding connecting parts 2011) are arranged to ensure the continuity between the protruding connecting parts 2011 and the internal skeleton (i.e., the internal node area material) as much as possible, avoiding material discontinuity caused by cutting, thereby forming the embedded part 201. Then, the protruding connecting parts 2011 are subjected to surface grinding and other treatments to improve interface performance. Then, a mixture of fiber and resin is used to coat the FRP pultruded profile rods 2013 and FRP profile embedded parts 2012 through a vacuum infusion process, and appropriate anchoring is performed at the end where the protruding connecting parts 2011 are connected to the internal skeleton, thereby obtaining the prefabricated connector 2.

[0040] In some embodiments, the prefabricated connector 2 is made of metal material, which can be selected according to actual needs.

[0041] In some embodiments, bolt 3 is a metal bolt 3 (e.g., a steel bolt 3) or a composite material bolt 3. Bolt 3 is an optional material and is used when using bolt 3 connections and plug-in hybrid connections. It serves to connect the FRP pultruded profile member 1 and the prefabricated connector 2 throughout the connection node, ensuring that both share the load and effectively transfer the load.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A FRP pultruded profile prefabricated connection node, characterized by, The application relates to a FRP (Fiber Reinforced Polymer) pultruded profile member, a prefabricated connector matched and connected with the FRP pultruded profile member, and a method for manufacturing the prefabricated connector. The application relates to a FRP (Fiber Reinforced Polymer) pultruded profile member, a prefabricated connector matched and connected with the FRP pultruded profile member, and a method for manufacturing the prefabricated connector. The prefabricated connector is reserved with an extended connecting part which is embedded and connected with the FRP pultruded profile member. The prefabricated connector is made of full composite material. The prefabricated connector is obtained by first manufacturing a pre-embedded part and then coating the pre-embedded part through a vacuum infusion process. The prefabricated connector is manufactured by first cutting and splicing FRP profile pre-embedded parts to form an internal framework, connecting the FRP profile pre-embedded parts through FRP pultruded profile rods, arranging the extended connecting part, thus forming the pre-embedded part, and then coating the FRP pultruded profile rods and the FRP profile pre-embedded parts through a vacuum infusion process of a mixture of fibers and resin, and appropriately anchoring the end part of the extended connecting part connected with the internal framework, thus obtaining the prefabricated connector. The FRP pultruded profile member is an I-shaped member, a tubular member or a channel-shaped member, and the extended connecting part is located at the web part of the I-shaped member, in the lumen of the tubular member or at the web part of the channel-shaped member.

2. The FRP pultruded profile-to-prefabricated connection joint according to claim 1, characterized in that, The FRP pultruded profile member and the extended connecting part are connected through bolt connection, adhesive connection or mixed glue-bolt connection.

3. The FRP pultruded profile-to-prefabricated connection joint according to claim 1, characterized in that, The bolt is a metal bolt.

4. The FRP pultruded profile-to-prefabricated connection joint according to claim 3, characterized in that, The bolt is a composite material bolt.

5. The FRP pultruded profiled precast connection joint according to claim 3, characterized in that, ​

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