Fabricated double-steel-plate concrete shear connector and manufacturing method

Abstract

The invention discloses a fabricated double-steel-plate concrete shear connector and a manufacturing method, relates to the technical field of shear connectors, and solves the problems that an existing shear connector is insufficient in durability, poor in shear resistance and difficult in fabricated construction in a severe environment. The device comprises two steel plates, composite reinforcing belts, shear connectors and concrete, the steel plates are arranged on the upper and lower surfaces of the concrete through the shear connectors, and the composite reinforcing belts are arranged between the steel plates and the concrete; the shear connector comprises a lining anchoring sleeve and a fastener, the lining anchoring sleeve is arranged in the concrete, and the outer surface of the lining anchoring sleeve is of a corrugated structure; through holes are formed in the centers of the steel plates, and fasteners penetrate through the through holes and the lining anchoring sleeves to fix the steel plates to the upper and lower surfaces of the concrete. Through the combination of the bolts and the lining anchoring sleeves, the shear resistance between the steel plate and the concrete is greatly enhanced, and the overall bearing capacity of the structure is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shear connectors, and in particular to an assembled double steel plate concrete shear connector and a manufacturing method thereof. Background Art

[0002] The double steel plate-concrete composite structure consists of steel plates on both sides, concrete and shear connectors. The three work together to give the structure good stress-bearing performance. At present, double steel plate-concrete composite structures are mostly used in the structures of major engineering facilities such as nuclear power plant containment, submarine immersed tube tunnels and polar ocean platforms. These major projects have put forward higher requirements on the mechanical properties and durability of the structure during service in harsh environments. However, in the on-site construction of the double steel plate concrete composite structure, due to the interweaving influence of various complex factors, the construction quality is often difficult to be effectively guaranteed. In the double steel plate-concrete structure, an efficient shear connection form is crucial to give full play to its advantages. The existing shear connectors have insufficient durability in harsh environments, poor shear performance and are difficult to adapt to the requirements of prefabricated construction. The market urgently needs a new type of shear connector that is both durable and easy to construct to improve structural performance and meet the needs of modern buildings. Summary of the invention

[0003] In order to solve the above-mentioned problems of insufficient durability, poor shear resistance and difficulty in assembly construction of existing shear connectors in harsh environments, the present invention proposes an assembled double steel plate concrete shear connector and a manufacturing method. The present invention greatly enhances the shear resistance between the steel plate and the concrete through the combination of bolts and liner anchor sleeves, and improves the overall bearing capacity of the structure.

[0004] The present invention proposes an assembled double steel plate concrete shear connector, which specifically includes two steel plates, a shear connector and concrete, wherein the steel plates are arranged on the upper and lower surfaces of the concrete through the shear connector; the shear connector includes an inner lining anchor sleeve and a fastener, and the inner lining anchor sleeve is arranged inside the concrete; a through hole is arranged in the center of the steel plate, and the fastener passes through the through hole and the inner lining anchor sleeve to fix the steel plate to the upper and lower surfaces of the concrete.

[0005] Furthermore, the outer surface of the liner anchoring sleeve is a corrugated structure.

[0006] Furthermore, it also includes two composite reinforcement belts, which are arranged between the steel plate and the concrete.

[0007] Furthermore, the composite reinforcement belt is made of carbon fiber reinforced plastic.

[0008] Furthermore, the fasteners include bolts and nuts, which cooperate to fix the steel plate to the upper and lower surfaces of the concrete.

[0009] Furthermore, the fastener also includes two washers, one washer is arranged between the nut of the bolt and the steel plate, and the other washer is arranged between the nut and the steel plate.

[0010] Furthermore, the steel plate is made of weathering steel.

[0011] Furthermore, the concrete adopts self-compacting reinforcement material.

[0012] A method for manufacturing the above-mentioned assembled double steel plate concrete shear connector comprises the following steps:

[0013] Step 1: placing the lining anchor sleeve in the template for preparing concrete, and then pouring concrete in the template;

[0014] Step 2: After the concrete has been cured and has reached the required strength, the formwork is removed and the positions of the concrete, steel plate and composite reinforcement belt are aligned;

[0015] Step 3: Install and tighten the fasteners.

[0016] The beneficial effects of the assembled double steel plate concrete shear connector and the manufacturing method described in the present invention are:

[0017] (1) The present invention discloses an assembled double steel plate concrete shear connector and a manufacturing method thereof, which overcomes the problems of insufficient durability, poor shear resistance and difficulty in assembly construction of existing shear connectors in harsh environments. By combining bolts and liner anchor sleeves, the shear resistance between the steel plate and the concrete is greatly enhanced, thereby improving the overall bearing capacity of the structure. At the same time, the embedded design of the liner anchor sleeve and the coordination of the bolts can reduce the complexity of on-site construction and improve construction efficiency.

[0018] (2) The present invention discloses an assembled double steel plate concrete shear connector and its manufacturing method, which uses corrosion-resistant materials and composite reinforcement strips, and can effectively improve the long-term service life of the connector, especially having high durability in harsh environments; the composite reinforcement strip can be flexibly installed to meet different engineering requirements, thereby improving the flexibility and adaptability of the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an assembled double steel plate concrete shear-resistant connector according to the present invention;

[0022] Figure 2 It is a front view of an assembled double steel plate concrete shear-resistant connector according to the present invention;

[0023] Figure 3 It is a structural schematic diagram of an assembled double steel plate concrete shear-resistant connector according to the present invention;

[0024] Figure 4 It is a schematic diagram of the structural composition of a fastener of an assembled double steel plate concrete shear-resistant connector according to the present invention;

[0025] Figure 5 This is a production flow chart of the assembled double steel plate concrete shear connector of the present invention when it is applied to a double steel plate concrete composite structure;

[0026] Among them: 1-steel plate, 2-composite reinforcement belt, 3-shear connector, 4-concrete, 5-lining anchor sleeve, 6-fastener, 7-bolt, 8-nut, 9-gasket, 10-formwork, 11-steel nail. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Specific implementation method 1: See Figure 1-Figure 5 The present embodiment is described in detail. The assembled double steel plate concrete shear connector described in the present embodiment specifically includes two steel plates 1, a shear connector 3 and concrete 4. The steel plate 1 is arranged on the upper and lower surfaces of the concrete 4 through the shear connector 3; the shear connector 3 includes a lining anchor sleeve 5 and a fastener 6. The lining anchor sleeve 5 is buried inside the concrete 4, and the axis of the lining anchor sleeve 5 is perpendicular to the steel plate 1; a through hole is arranged in the center of the steel plate 1, and the fastener 6 passes through the through hole and the lining anchor sleeve 5 to fix the steel plate 1 to the upper and lower surfaces of the concrete 4. The outer surface of the lining anchor sleeve 5 is a corrugated structure, which increases the contact area with the concrete 4 and improves the strength; the lining anchor sleeve 5 is made of high-strength steel.

[0032] It also includes two composite reinforcement belts 2, which are arranged between the steel plate 1 and the concrete 4; the composite reinforcement belts 2 are made of carbon fiber reinforced plastic (CFRP), which improves the overall service life and durability.

[0033] The fastener 6 includes a bolt 7, a nut 8 and two washers 9. The bolt 7 passes through the through hole on the steel plate 1 and the liner anchor sleeve 5 and cooperates with the nut 8 to fix the steel plate 1 to the upper and lower surfaces of the concrete 4. One washer 9 is arranged between the nut of the bolt 7 and the steel plate 1, and the other is arranged between the nut 8 and the steel plate 1. The inner diameter of the washer 9 is slightly larger than the outer diameter of the screw of the bolt 7, and the outer diameter is slightly larger than the outer diameter of the nut of the bolt 7. The outer diameter of the screw of the bolt 7 is slightly smaller than the diameter of the through hole of the steel plate 1, and is also slightly smaller than the inner diameter of the liner anchor sleeve 5. The bolt 7, nut 8 and washer 9 are all made of stainless steel.

[0034] The steel plate 1 is made of weathering steel.

[0035] The concrete 4 is made of self-compacting reinforced material, such as ultra-high performance concrete (UHPC).

[0036] Combination Figure 5 A method for manufacturing the above-mentioned assembled double steel plate concrete shear connector when applied to a double steel plate concrete composite structure comprises the following steps:

[0037] Step 1: Build a template 10 system for pouring concrete 4. According to the design position of the shear connector 3, nail steel nails 11 at the bottom of the template 10, and firmly fix the position of the liner anchor sleeve 5 by the steel nails 11; accurately put the liner anchor sleeve 5 on the pre-nailed steel nails 11, and then place these liner anchor sleeves 5 in the concrete 4 pouring template 10; pour concrete 4 into the template 10;

[0038] Step 2: After the concrete 4 has been cured and has reached the required strength, the formwork 10 is removed; the positions of the concrete 4, the steel plate 1 and the composite reinforcement belt 2 are aligned;

[0039] Step 3: Install and tighten the fasteners 6 to ensure a tight connection between the steel plate 1 and the concrete 4.

[0040] To summarize the above implementation cases, the prefabricated double steel plate concrete shear connector and its manufacturing method described in the present invention overcome the problems of insufficient durability and shear resistance of existing shear connectors in harsh environments. Through the combination of bolts 7 and lining anchor sleeves 5, the shear resistance between the steel plate 1 and the concrete 4 is greatly enhanced, and the overall bearing capacity of the structure is improved; at the same time, the pre-embedded design of the lining anchor sleeve 5 and the coordination of the bolts 7 can reduce the complexity of on-site construction and improve construction efficiency. The prefabricated double steel plate concrete shear connector and its manufacturing method described in the present invention use corrosion-resistant materials and composite reinforcement belts 2, which can effectively improve the long-term service life of the connector, especially in harsh environments. It has high durability; the composite reinforcement belt 2 can be flexibly installed to adapt to different engineering requirements, thereby improving the flexibility and adaptability of construction.

[0041] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled double steel plate concrete shear connector, characterized in that: The invention comprises two steel plates (1), a shear connector (3) and concrete (4); the steel plate (1) is arranged on the upper and lower surfaces of the concrete (4) through the shear connector (3); the shear connector (3) comprises an inner lining anchor sleeve (5) and a fastener (6); the inner lining anchor sleeve (5) is arranged inside the concrete (4); a through hole is arranged at the center of the steel plate (1); the fastener (6) passes through the through hole and the inner lining anchor sleeve (5) to fix the steel plate (1) to the upper and lower surfaces of the concrete (4).

2. The assemblable double steel plate concrete shear connector according to claim 1, characterized in that: The outer surface of the liner anchoring sleeve (5) is a corrugated structure.

3. The assembled double steel plate concrete shear connector according to claim 1 is characterized in that: It also comprises two composite reinforcement strips (2), wherein the composite reinforcement strips (2) are arranged between the steel plate (1) and the concrete (4).

4. The assembled double steel plate concrete shear connector according to claim 3 is characterized in that: The composite reinforcement belt (2) is made of carbon fiber reinforced plastic.

5. The assembled double steel plate concrete shear connector according to claim 1 is characterized in that: The fastener (6) comprises a bolt (7) and a nut (8), and the bolt (7) and the nut (8) cooperate to fix the steel plate (1) on the upper and lower surfaces of the concrete (4).

6. The assembled double steel plate concrete shear connector according to claim 5 is characterized in that: The fastener (6) further comprises two washers (9), one washer (9) being arranged between the nut of the bolt (7) and the steel plate (1), and the other washer (9) being arranged between the nut (8) and the steel plate (1).

7. The assembled double steel plate concrete shear connector according to claim 1 is characterized in that: The steel plate (1) is made of weathering steel.

8. The assembled double steel plate concrete shear connector according to claim 1 is characterized in that: The concrete (4) adopts self-compacting reinforcement material.

9. A method for manufacturing the assembled double steel plate concrete shear connector according to claim 4, characterized in that: The following steps are involved: Step 1: placing the lining anchor sleeve (5) in a template (10) for preparing concrete (4), and then pouring concrete (4) in the template (10); Step 2: After the concrete (4) has been cured and has reached the required strength, the formwork (10) is removed and the positions of the concrete (4), the steel plate (1) and the composite reinforcement strip (2) are aligned; Step 3: Install and tighten the fasteners (6).

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