A profile node connection structure, production process and application

Abstract

The present invention discloses a profile node connection structure, a production process and an application thereof. The profile node connection structure includes a rectangular hollow pipe, a partition board, a connecting plate and a bolt connecting piece; during production, the use parameters of the rectangular hollow pipe and the filler, the distance between the partition board and the node splicing interface, and the use parameters of the connecting plate and the bolt connecting piece are designed according to the requirements of the node connection bearing capacity; filling connection holes are opened on the upper and lower surfaces of the rectangular hollow pipe according to the size of the bolt connecting piece, and corresponding holes corresponding to the filling connection holes are opened on the connecting plate; two rectangular hollow pipes are spliced, and the filler is filled into the cavity through the filling connection holes; the connecting plates are respectively attached to the top surface and the bottom surface at the joint of the rectangular hollow pipes, and are tightly connected through the bolt connecting pieces; the profile node connection structure is applied in the connection of PFRP pipes. The node structure provided by the present invention has the advantages of high strength and stiffness.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and more specifically to a profile node connection structure, production process and application. Background Art

[0002] Fiber Reinforced Polymer Pultruded Profile, abbreviated as PFRP, is a new type of profile made of FRP fiber filaments through the pultrusion process. It has the consistent advantages of FRP materials such as light weight, high strength, corrosion resistance, and convenient processing. At the same time, its significant advantage of high production efficiency enables this material to be widely promoted and applied to structures in general or special environments.

[0003] PVA fibers have good hydrophilicity, impact resistance, and adhesiveness, and also have good dispersibility during processing. PVA fiber concrete has relatively good acid and alkali resistance and can be applied to cements of various strength grades. At present, as one of the representatives of fiber reinforced polymer cement concrete, PVA fiber concrete has been favored by many scholars at home and abroad. Comprehensive experimental studies have been carried out on it, and the crack resistance, strengthening, and toughening effects of the fibers have been analyzed based on the experimental results.

[0004] The connection problem of PFRP profile pipes has always been the focus of attention of scholars in various countries. Previous research on the connection of PFRP profiles mainly focused on the connection of plates, and the connection methods included bolt connection, adhesive connection, and bolt - adhesive hybrid connection. The failure of plate connection mainly occurs in one plane, which is a two - dimensional problem. However, the failure of pipe connection may occur on various surfaces, which is a three - dimensional problem. The previous connection methods applicable to plates cannot be directly used for the node connection of pipes, and many problems need to be solved urgently. The existing connection methods for pipes mainly imitate the practices of steel structures and use angular universal connectors for connection. The most likely failure of this connection is the delamination and peeling failure inside the profile material, which is a brittle failure. While ensuring the effective bonding between the pipe and PVA fiber concrete, the toughness and crack resistance of PVA fiber concrete can effectively slow down the brittle failure of the pipe, have a certain ductility, and at the same time greatly improve the stiffness and strength of the node.

[0005] Therefore, how to provide a high - strength profile node connection structure, production process and application is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a profile node connection structure to solve the above - mentioned technical problems.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A profile node connection structure, comprising: a rectangular hollow tube, a partition plate, a connecting plate, and a bolt connecting piece;

[0009] The ends of the two rectangular hollow tubes have notches that are spliced with each other to form an L-shaped structure, and the node joints of the two rectangular hollow tubes are closed and the internal cavities are connected;

[0010] The partition plate is coaxially and fixedly closed inside the rectangular hollow tube and is close to the node joint;

[0011] The rectangular hollow tube is provided with corresponding filling connection holes between the partition plate and the top and bottom walls of the node joint; a filler is filled in the sealed cavity formed by the two rectangular hollow tubes and the two partition plates;

[0012] The number of the connecting plates is two, and they are respectively arranged in a fitting manner on the top and bottom surfaces of the connection part of the two rectangular hollow tubes;

[0013] The bolt connecting piece passes through the connecting plate and the filling connection hole to tightly connect the rectangular hollow tube and the connecting plate.

[0014] Through the above technical solution, the present invention enhances the connection strength and stiffness of the L-shaped node by forming a cavity in the rectangular hollow tube and filling it with a filler, further improves the stability of the connection structure by the fastening of the connecting plate and the bolt connecting piece, and selects a filler with good fluidity and ductility to reduce the possibility of delamination failure of the rectangular hollow tube.

[0015] Preferably, in the above-mentioned profile node connection structure, the rectangular hollow tube is made of PFRP material. The PFRP material has the advantages of light weight, high strength, corrosion resistance, and convenient processing.

[0016] Preferably, in the above-mentioned profile node connection structure, the filler is PVA fiber concrete. By using the good fluidity of PVA fiber concrete, the cavity can be filled as much as possible with a small opening, and the ductility of the concrete is enhanced by PVA fibers. At the same time, it can also make the node show a certain ductility as much as possible when damaged, reducing the possibility of delamination failure of the PFRP profile.

[0017] Preferably, in the above-mentioned profile node connection structure, the bolt connecting piece is made of PFRP material. The PFRP material has the advantages of light weight, high strength, corrosion resistance, and convenient processing.

[0018] Preferably, in the above-mentioned profile node connection structure, the connecting plate is pentagonal. It can not only fit with the rectangular hollow tube conformally but also completely cover the connection part to ensure the structural stability of the connection.

[0019] The present invention also provides a production process for a profile node connection structure, which specifically includes the following steps:

[0020] S1. Open filling connection holes on the upper and lower surfaces of the rectangular hollow pipe according to the size of the bolt connection member, and open corresponding holes on the connection plate corresponding to the filling connection holes;

[0021] S2. Splice two rectangular hollow pipes, and fill the cavity with filling material through the filling connection holes;

[0022] S3. Fit the connection plates to the top and bottom surfaces of the connection part of the rectangular hollow pipe respectively, and tightly connect them through bolt connection members.

[0023] Through the above technical solutions, the present invention provides a production process for a profile node connection structure that is convenient for design and installation, can quickly realize the parameter design and selection of each construction material, is convenient for installation, has strong practicability, and is convenient for popularization.

[0024] The present invention also provides an application of a profile node connection structure, and the profile node connection structure is applied in the connection of PFRP pipes.

[0025] The present invention applies the profile node connection structure to the connection of PFRP pipes, can effectively utilize the structural and performance advantages of new materials, promote the use and development of new materials, and can maximize the stiffness and strength of the node connection structure.

[0026] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a profile node connection structure, production process and application, and has the following beneficial effects:

[0027] 1. The present invention enhances the connection strength and stiffness of the L-shaped node by forming a cavity in the rectangular hollow pipe and filling it with filling material. The good fluidity of PVA fiber concrete can make the cavity filled under the condition of as small an opening as possible, and the ductility of the concrete is enhanced by PVA fibers. At the same time, it can also make the node present a certain ductility as much as possible when damaged, reducing the possibility of delamination failure of PFRP profiles.

[0028] 2. The present invention provides a production process for a profile node connection structure that is convenient for design and installation, can quickly realize the parameter design and selection of each construction material, is convenient for installation, has strong practicability, and is convenient for popularization.

[0029] 3. The present invention applies the profile node connection structure to the connection of PFRP pipes, can effectively utilize the structural and performance advantages of new materials, promote the use and development of new materials, and can maximize the stiffness and strength of the node connection structure. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0031] Figure 1 The attached drawing is a schematic structural diagram of the present invention without the connecting plate installed;

[0032] Figure 2 The attached drawing is a schematic structural diagram of the present invention after the connecting plate is installed.

[0033] Wherein:

[0034] 1 - rectangular hollow tube;

[0035] 2 - partition board;

[0036] 3 - connecting plate;

[0037] 4 - filling connection hole;

[0038] 5 - filler;

[0039] 6 - node splicing interface. Detailed implementation manners

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] Embodiment 1:

[0042] Refer to Attachment Figure 1 and Attachment Figure 2 , the embodiment of the present invention discloses a profile node connection structure, including: a rectangular hollow tube 1, a partition board 2, a connecting plate 3 and a bolt connecting member;

[0043] The ends of two rectangular hollow tubes 1 have notches for mutual splicing, so that they are spliced to form an L-shaped structure, and the node splicing interfaces 6 of the two rectangular hollow tubes 1 are closed and the internal cavities are communicated;

[0044] The partition board 2 is coaxially and fixedly closed inside the rectangular hollow tube 1 and close to the node splicing interface 6;

[0045] The top and bottom walls of the rectangular hollow tube 1 located between the partition board 2 and the node splicing joint 6 are provided with corresponding filling connection holes 4; the closed cavity formed by the two rectangular hollow tubes 1 and the two partition boards 2 is filled with a filler 5;

[0046] The number of the connecting plates 3 is two, and they are respectively arranged in a fitting manner on the top and bottom surfaces of the connection part of the two rectangular hollow tubes 1;

[0047] The bolt connector passes through the connecting plate 3 and the filling connection hole 4 to tightly connect the rectangular hollow tube 1 and the connecting plate 3.

[0048] To further optimize the above technical solution, the rectangular hollow tube 1 is made of PFRP material.

[0049] To further optimize the above technical solution, the filler 5 is PVA fiber concrete.

[0050] To further optimize the above technical solution, the bolt connector is made of PFRP material.

[0051] To further optimize the above technical solution, the connecting plate 3 is pentagonal.

[0052] Embodiment 2:

[0053] On the basis of Embodiment 1, this embodiment provides a production process of a profile node connection structure, which specifically includes the following steps:

[0054] S1. Open the filling connection holes 4 on the upper and lower surfaces of the rectangular hollow tube 1 according to the size of the bolt connector, and open corresponding holes on the connecting plate 3 corresponding to the filling connection holes 4;

[0055] S2. Splice the two rectangular hollow tubes 1, and fill the cavity with the filler 5 through the filling connection holes 4;

[0056] S3. Respectively attach the connecting plate 3 to the top and bottom surfaces of the connection part of the rectangular hollow tube 1, and tightly connect them through the bolt connector.

[0057] Embodiment 3:

[0058] On the basis of Embodiment 1, this embodiment provides an application of a profile node connection structure, and the profile node connection structure is applied in the connection of PFRP pipes.

[0059] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0060] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A profile node connection process, characterized in that, it includes: a rectangular hollow tube (1), a partition board (2), a connecting plate (3) and a bolt connecting piece; The ends of the two rectangular hollow tubes (1) have notches that are spliced with each other to form an L-shaped structure. The node splicing openings (6) of the two rectangular hollow tubes (1) are closed and the internal cavities are connected; The partition board (2) is coaxially and fixedly closed inside the rectangular hollow tube (1) and close to the node splicing opening (6); Filling connection holes (4) are opened on the top wall and the bottom wall of the rectangular hollow tube (1) between the partition board (2) and the node splicing opening (6); A filler (5) is filled in the sealed cavity formed by the two rectangular hollow tubes (1) and the two partition boards (2); The number of the connecting plates (3) is two, and they are respectively arranged in a fitting manner on the top surface and the bottom surface of the joint of the two rectangular hollow tubes (1); The bolt connecting piece passes through the connecting plate (3) and the filling connection hole (4) to tightly connect the rectangular hollow tube (1) and the connecting plate (3); Specifically, it includes the following steps: S1. Open filling connection holes (4) on the upper and lower surfaces of the rectangular hollow tube (1) according to the size of the bolt connecting piece, and open corresponding holes on the connecting plate (3) corresponding to the filling connection holes (4); S2. Splice the two rectangular hollow tubes (1), and fill the filler (5) into the cavity through the filling connection hole (4); S3. Respectively attach the connecting plates (3) to the top surface and the bottom surface of the joint of the rectangular hollow tube (1), and tightly connect them through bolt connecting pieces.

2. A profile node connection process according to claim 1, characterized in that, the rectangular hollow tube (1) is made of PFRP material.

3. A profile node connection process according to claim 1 or 2, characterized in that, the filler (5) is PVA fiber concrete.

4. A profile node connection process according to claim 3, characterized in that, the bolt connecting piece is made of PFRP material.

5. A profile node connection process according to claim 1, characterized in that, the connecting plate (3) is pentagonal.

6. An application of the profile node connection process according to any one of claims 1-5, characterized in that, the profile node connection process is applied to the connection of PFRP pipes.

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