UHPC sleeve connecting and reinforcing joint structure

Abstract

The utility model provides a UHPC (Ultra High Performance Concrete) sleeve connecting and reinforcing node structure which comprises a bolt and a sleeve, the bolt is sleeved in the sleeve, the root of the sleeve extends out of a sleeve branch steel piece, and the sleeve and the sleeve branch steel piece are embedded in UHPC materials. The connecting structure has the advantages that an innovative sleeve joint connecting mode is adopted, meanwhile, the connection between the connecting structure and UHPC materials is improved through the sleeve branch steel pieces, and therefore the strength and rigidity of the joint are improved, and the reliability and safety of the structure are improved.

Description

Technical Field

[0001] The utility model relates to a connection structure, in particular to a UHPC sleeve connection and strengthening joint structure. Background Technique

[0002] With the increasing complexity of engineering structures, the requirements for the strength, toughness and durability of structures are constantly improving. As a kind of high-performance concrete material, ultra-high performance concrete (UHPC) has the advantages of high strength, high toughness and high durability, and is gradually applied in engineering such as buildings and bridges. However, in the node design of UHPC, there are still problems such as single connection method, insufficient strength and stiffness, and there are also certain challenges in the overall plate safety.

[0003] However, in the actual application of UHPC, node design has always been one of the important problems it faces. Nodes are key parts in the structure and need to bear various complex forces, including tensile force, compressive force, shear force, etc. Traditional UHPC node design usually uses steel bar connection methods for node construction, but this connection method has problems such as large construction difficulty, low efficiency, uneven steel bar arrangement, and insecure connection, seriously affecting the strength and stiffness of the node. Traditional UHPC node design also has problems such as unclear force transfer mechanism and insufficient utilization of material properties. In addition, UHPC is prone to material fragmentation in actual engineering applications. In terms of safety, due to the high compressive and tensile strength of UHPC, traditional construction methods are difficult to ensure the safety and stability during construction. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: to provide a UHPC sleeve connection and strengthening joint structure, aiming to improve the strength and stiffness of the connection node.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a UHPC sleeve connection and strengthening joint structure, including a bolt and a sleeve, the bolt is sleeved in the sleeve, a steel member extending out of the sleeve is extended from the root of the sleeve, and the sleeve and the steel member extending out of the sleeve are embedded in the UHPC material.

[0006] Further, the shape of the member extending out of the sleeve is one of a cylindrical shape, a butterfly shape, a rectangular shape, a rhombus shape or a fan shape.

[0007] Further, in the UHPC material, steel bars are arranged around the sleeve.

[0008] Further, the number of the steel bars is 1, 2, 4 or 8.

[0009] Furthermore, the arrangement of the steel bars is symmetrical arrangement, corner arrangement or circular arrangement.

[0010] Furthermore, steel hoops are provided on the periphery of the steel bars, and the steel hoops surround the steel bars.

[0011] Furthermore, the distance from the protruding steel part of the sleeve to the bottom surface of the UHPC material is greater than or equal to 10 mm.

[0012] The present utility model also provides a UHPC sleeve connection and strengthening node structure, including through bolts and UHPC material. The through bolts penetrate through the UHPC material, and through sleeves are respectively sleeved at both ends of the through bolts. Nuts are provided at both ends of the through bolts, and the nuts respectively press against the through sleeves at both ends.

[0013] Furthermore, bolt washers are provided between the through bolts and the through sleeves.

[0014] Furthermore, the distance from the through sleeve to the edge of the UHPC material is greater than or equal to 3 times the diameter of the through bolt.

[0015] The beneficial effects of the present utility model are as follows: This design adopts an innovative sleeve node connection method, and at the same time utilizes the protruding steel part of the sleeve to improve the connection with the UHPC material, thereby improving the strength and stiffness of the node and enhancing the reliability and safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model 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 following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the mechanisms shown in these drawings.

[0017] Figure 1 It is a schematic diagram of the sleeve connection structure of the embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the steel bars arranged around the sleeve in the embodiment of the present utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the sleeve under tension in the embodiment of the present utility model;

[0020] Figure 4 It is a schematic diagram of the structural form of the through sleeve in the embodiment of the present utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the sleeve under shear in the embodiment of the present utility model;

[0022] Figure 6 Schematic diagram of pasting a back net on the surface of a large UHPC slab in an embodiment of the present utility model.

[0023] Among them, 1. Bolt; 2. Sleeve; 3. Steel part protruding from the sleeve; 4. Through bolt; 5. Bolt gasket; 6. Connecting plate; 7. Through sleeve; 8. Steel bar; 9. Steel hoop; 10. Back net; 20. UHPC material. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] It should be noted that the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0026] As Figures 1 - 3 shown, an embodiment of the present utility model is: a UHPC sleeve connection and strengthening node structure, including a bolt 1 and a sleeve 2, the bolt 1 is sleeved in the sleeve 2, a steel part 3 protruding from the root of the sleeve 2 extends out, and the sleeve 2 and the steel part 3 protruding from the sleeve are embedded in the UHPC material 20.

[0027] In this embodiment, the sleeve 2 node connection method is adopted, and at the same time, the steel part 3 protruding from the sleeve is used to improve the connection with the UHPC material 20, thereby improving the strength and stiffness of the node and enhancing the reliability and safety of the structure.

[0028] Among them, the shape of the protruding part of the sleeve 2 is one of a cylindrical shape, a butterfly shape, a rectangular shape, a rhombus shape or a fan shape.

[0029] In a specific embodiment, steel bars 8 are arranged around the sleeve 2 in the UHPC material 20.

[0030] Furthermore, the number of the steel bars 8 is 1, 2, 4 or 8.

[0031] Furthermore, the arrangement of the steel bars 8 is symmetric arrangement, corner arrangement or circular arrangement.

[0032] Furthermore, a steel hoop 9 is provided on the periphery of the steel bars 8, and the steel hoop 9 surrounds the steel bars 8.

[0033] In this embodiment, the design of arranging the steel bars 8 around the sleeve 2 strengthens the joints and the overall plate. Arranging the steel bars 8 around the sleeve 2 can effectively increase the tensile, bending and shear resistance of the UHPC material 20 around the sleeve 2. The steel bars 8 are arranged in a continuous length. Besides improving the joint strength, it can also improve the overall performance of the UHPC special-shaped large plate.

[0034] In a specific embodiment, the distance from the steel part 3 protruding from the sleeve to the bottom surface of the UHPC material 20 is greater than or equal to 10 mm.

[0035] In this embodiment, when the sleeve 2 is in tension, the distance from the surface of the UHPC material 20 to the ground of the sleeve 2 should be greater than or equal to 10 mm.

[0036] The present utility model provides a UHPC sleeve connection and strengthening joint structure, a sleeve 2 connection design and a joint strengthening structure technical solution for the connection of UHPC new materials in special-shaped curtain wall large plates, and a technical solution for improving the overall safety of UHPC new material special-shaped large plate curtain walls. This design adopts an innovative sleeve joint connection method, and at the same time uses the sleeve 2 strengthening steel parts to improve the connection with the UHPC material 20, thereby improving the strength and stiffness of the joint. This design can effectively solve the problems existing in the traditional UHPC joint design, and improve the reliability and safety of the structure. At the same time, an innovative technical solution for improving the overall safety of the plate is proposed to ensure that the UHPC material 20 will not fall off.

[0037] As Figure 4 、 Figure 5 shown, the present utility model also provides a UHPC sleeve connection and strengthening joint structure, including a through bolt 4 and a UHPC material 20. The through bolt 4 passes through the UHPC material 20 horizontally. Through sleeves 7 are respectively sleeved at both ends of the through bolt 4. Nuts are provided at both ends of the through bolt 4, and the nuts respectively abut against the through sleeves 7 at both ends.

[0038] Furthermore, a connecting plate 6 is provided on the outside of the through bolt 4.

[0039] Furthermore, a bolt gasket 5 is provided between the through bolt 4 and the through sleeve 7.

[0040] Furthermore, the distance from the through sleeve 7 to the edge of the UHPC material 20 is greater than or equal to 3 times the diameter of the through bolt 4.

[0041] In this embodiment, a structure form of the through sleeve 7 is proposed to strengthen the joint. The structure form of the through sleeve 7 avoids the situation that the internal material is in tension under the action of shear force, and at the same time increases the area of the shear surface, greatly improving the safety performance of the joint and providing strong assistance for the edge distance of the through bolt 4 from the concrete.

[0042] As Figure 6 shown, a technical solution of pasting a back net 10 on the surface of the large plate UHPC material 20 is adopted. The back net 10 is a steel wire fiberglass composite net, which is pasted on the surface of the UHPC material 20 in a full-coverage manner and pasted with an adhesive. In this embodiment, epoxy adhesive E-51 is used, the curing agent is toughened modified polyamide, the density of the stainless steel wire mesh is 30 meshes, and the design of covering the UHPC surface with other forms of back net 10 is within the scope of the present utility model.

[0043] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A UHPC sleeve connection and reinforcement node structure, characterized in that: It comprises a bolt and a sleeve, wherein the bolt is sleeved in the sleeve, a sleeve extension steel piece is extended from the root of the sleeve, and the sleeve and the sleeve extension steel piece are embedded in the UHPC material.

2. The UHPC sleeve connection and reinforcement node structure according to claim 1, characterized in that: The sleeve ejector has a shape of a cylinder, a butterfly, a rectangle, a diamond or a fan.

3. The UHPC sleeve connection and reinforcement node structure according to claim 1, characterized in that: In the UHPC material, steel bars are arranged around the sleeve.

4. The UHPC sleeve connection and reinforcement node structure according to claim 3, characterized in that: The number of the steel bars is 1, 2, 4 or 8.

5. The UHPC sleeve connection and reinforcement node structure according to claim 4, characterized in that: The steel bars are arranged in a symmetrical arrangement, a four-corner arrangement or a circular arrangement.

6. The UHPC sleeve connection and reinforcement node structure according to claim 5, characterized in that: A steel hoop is arranged on the periphery of the steel bar, and the steel hoop surrounds the steel bar.

7. The UHPC sleeve connection and reinforcement node structure according to claim 1, characterized in that: The distance between the sleeve extension steel piece and the bottom surface of the UHPC material is greater than or equal to 10 mm.

8. A UHPC sleeve connection and reinforcement node structure, characterized in that: The invention comprises a through bolt and a UHPC material. The through bolt traverses the UHPC material. Two ends of the through bolt are respectively sleeved with through sleeves. Both ends of the through bolt are provided with nuts, which respectively support the through sleeves at the two ends.

9. The UHPC sleeve connection and reinforcement node structure according to claim 8, characterized in that: A bolt gasket is arranged between the through-bolt and the through-sleeve.

10. The UHPC sleeve connection and reinforcement node structure according to claim 8, characterized in that: The distance between the through-penetration sleeve and the edge of the UHPC material is greater than or equal to 3 times the diameter of the through-penetration bolt.

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