Split stud

Abstract

The present application provides a split bolt, which relates to the field of building technology. The split bolt comprises: a base and a plurality of split parts, the split parts comprising a first part and a second part, one end of the first part is connected to the second part, the other end of the first part is connected to the base, the first parts of the plurality of split parts and the base constitute a bolt rod, the second parts of the plurality of split parts constitute a bolt cap, and there is a gap between adjacent split parts, and the gap is filled with an elastic partition material. The split bolt greatly improves the shear strength of the bolt by increasing the diameter of the base, meeting the shear force requirements between steel and high-strength or ultra-high performance concrete. The upper split part is used to meet the requirement that "the length of the weld of the cylindrical head welded nail connector should not be less than 4 times its rod diameter", and maintain good ductility. It has the advantages of avoiding the group nail effect, convenient construction, reducing the number and height of the bolts, and increasing the shear bearing capacity without reducing the ductility.

Description

Technical Field

[0001] The present application relates to the field of construction technology, and in particular to a split type bolt. Background Art

[0002] At present, steel-concrete composite structures have been fully studied and widely used. This structure can make full use of the compressive properties of concrete and the tensile properties of steel, and has the advantages of high bearing capacity, good deformation performance, reasonable force and economy. The realization of these advantages depends on the key part that combines steel and concrete to work together - shear connectors. As a kind of flexible shear connector, studs have been widely used in house construction and bridges. For example, in steel-concrete composite beams, studs can transmit the shear force between the contact surface of the steel beam and the concrete slab, preventing the relative slippage and lifting of the two, thereby ensuring the effective cooperation of the two materials.

[0003] With the rapid development of research on high-strength and high-performance materials, the composite structure of high-strength steel and ultra-high performance concrete has become a new research direction. The resulting problem is that the shear strength of the bolts with a diameter of φ10 to φ25 commonly used in the specifications cannot bear the increased shear stress between the steel and high-strength concrete interface. The bolts have become the weak points in the composite components, and brittle failure is likely to occur here, which cannot give full play to the advantages of high-strength and high-performance materials.

[0004] If conventional diameter bolts are used, they need to be densely distributed, which will lead to uneven shear force distribution of the bolt groups, a certain degree of reduction in bearing capacity, and difficult actual layout and a large workload. Summary of the invention

[0005] The purpose of the present application is to provide a split-type bolt, which can improve the problem that the existing bolts are not suitable for combining high-strength steel and high-performance concrete to work together.

[0006] The embodiment of the present application is implemented as follows:

[0007] An embodiment of the present application provides a split bolt, comprising: a base and a plurality of split parts, the split parts comprising a first part and a second part, one end of the first part is connected to the second part, the other end of the first part is connected to the base, the first parts of the plurality of split parts and the base constitute a bolt rod, the second parts of the plurality of split parts constitute a bolt cap, there is a gap between adjacent split parts, and the gap is filled with elastic separation material.

[0008] Multiple split parts can make the split bolt meet the existing steel structure design standards and have good ductility. Each split part has low stiffness and is more susceptible to bending and deformation. After connecting high-strength steel and high-strength concrete, internal forces can be redistributed inside the high-strength concrete to exert the strength of the combined structure of high-strength steel and high-performance concrete.

[0009] In addition, the split bolt provided in the embodiment of the present application may also have the following additional technical features:

[0010] In an optional embodiment of the present application, the slit penetrates axially to the upper end of the base of the peg and penetrates the peg radially.

[0011] Such a design is easy to process and fill with elastic separation materials while meeting the use requirements.

[0012] In an optional embodiment of the present application, the overall aspect ratio of the split type bolt is 2, and the ratio of the height to the width of the split portion is greater than or equal to 4.

[0013] In this way, the height of the entire split stud can be reduced, and when the thickness of the high-strength concrete slab is thin, it can meet the use requirements.

[0014] In an optional embodiment of the present application, the diameter of the bolt rod is 30-50 mm, the diameter of the bolt cap is 45-75 mm, the height of the bolt cap is 12-15 mm, and the overall height of the split bolt is 60-100 mm.

[0015] The diameter of the bolt rod is larger than the size of commonly used bolts specified in the specifications, which can greatly improve the shear strength. Moreover, due to the design of the split part, the overall ductility of the split bolt can be maintained after the diameter is enlarged.

[0016] In an optional embodiment of the present application, the width of the gap is 4 to 8 mm.

[0017] In an optional embodiment of the present application, the height of the base is 8 to 16 mm.

[0018] In an optional embodiment of the present application, the number of the split parts is two or four.

[0019] In an optional embodiment of the present application, the base and the split portion are made of ML15, ML15AL, Q345, Q390, Q420 or Q460.

[0020] In an optional embodiment of the present application, the gap is filled with aluminum, tin, epoxy resin, caulking agent, sealant, caulking paste or building structural adhesive.

[0021] In an optional embodiment of the present application, the split bolt further includes an object to be welded, the base is welded to the object to be welded, and the object to be welded is a steel plate, an I-shaped steel, an H-shaped steel or a steel pipe.

[0022] By directly configuring the welded object, the split studs can be directly cast together with high-strength concrete or ultra-high performance concrete after formwork, which is more convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a split-type bolt provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 The main view of

[0026] Figure 3 for Figure 1 Schematic diagram of the split studs combined with concrete and steel beams;

[0027] Figure 4 A schematic diagram of a second split-type bolt provided in an embodiment of the present application;

[0028] Figure 5 for Figure 4 Schematic diagram of the combination of the split stud and the corrugated steel plate;

[0029] Figure 6 A schematic diagram of a third split-type bolt provided in an embodiment of the present application.

[0030] Icons: 1-split bolt; 11-base; 12-split part; 121-first part; 122-second part; 2-elastic separator; 3-weld; 4-concrete. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of this application, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product is usually placed when in use, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0035] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] Example

[0037] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a split bolt 1, comprising: a base 11 and a plurality of split parts 12, the split parts 12 comprising a first part 121 and a second part 122, one end of the first part 121 is connected to the second part 122, the other end of the first part 121 is connected to the base 11, the first parts 121 of the plurality of split parts 12 and the base 11 constitute a bolt rod, the second parts 122 of the plurality of split parts 12 constitute a bolt cap, and there is a gap between adjacent split parts 12, and the gap is filled with an elastic separation material 2.

[0038] The multiple split parts 12 can make the split bolt 1 meet the existing steel structure design standards (GB50017-2017 "Steel Structure Design Standard" 14.7.5 Composite beam construction regulations: The length of the cylindrical head welded nail connector should not be less than 4 times the rod diameter) through the upper part, have good ductility, and each split part 12 has low rigidity and is more prone to bending and deformation. After connecting the high-strength steel and the high-strength concrete 4, it can redistribute the internal force inside the high-strength concrete 4 to exert the strength of the combined structure of the high-strength steel and the high-performance concrete 4. The base 11 below can improve the shear strength.

[0039] The base 11 and the split part 12 are made of ML15, ML15AL, Q345, Q390, Q420 or Q460. The gap is filled with aluminum, tin, epoxy resin, caulking agent, sealant, caulking paste or building structural adhesive.

[0040] Specifically, the gap penetrates to the upper end of the base of the bolt in the axial direction and penetrates the bolt in the radial direction. Such a design is easy to process and fill with the elastic separation material 2 while meeting the use requirements.

[0041] Furthermore, the split stud 1 can be made of large-diameter studs, large-diameter welding nails, large-diameter bolts or large-diameter steel bars, and then the gaps are cut by a CNC plasma cutting machine or the like, and the uncut part is left as the base 11.

[0042] In order to meet the steel structure design standards, the overall aspect ratio of the split stud 1 of this embodiment is 2, and the ratio of the height to the width of the split portion 12 is greater than or equal to 4. Such a design of this embodiment can reduce the height of the entire split stud 1, and can meet the use requirements when the thickness of the high-strength concrete 4 plate is thin.

[0043] Specifically, the diameter of the bolt rod of the present application is 30-50 mm, the diameter of the bolt cap is 45-75 mm, the height of the bolt cap is 12-15 mm, and the overall height of the split bolt 1 is 60-100 mm. The width of the gap is 4-8 mm. The height of the base 11 is 8-16 mm.

[0044] for example Figure 1 The split bolt 1 shown has a diameter of 40 mm, a bolt cap diameter of 60 mm, a bolt cap height of 15 mm, and an overall height of 80 mm. It is cut into four split parts 12, with a cutting seam width of 6 mm. An uncut area (base 11) is left at the bottom of the bolt, with a height of 12 mm, and epoxy resin is filled in the gap. For example Figure 4The second split bolt 1 shown has a rod diameter of 30 mm, a bolt cap diameter of 45 mm, a bolt cap height of 12 mm, and an overall height of 60 mm. It is cut into four split parts 12, with a cutting seam width of 5 mm. An uncut area (base 11) is left at the bottom of the bolt, with a height of 10 mm, and epoxy resin is filled in the gap.

[0045] Since the diameter of the base 11 is larger than that of an ordinary bolt, its shear strength is improved. Moreover, since the diameter of the entire split bolt 1 is not simply increased, the shear strength is improved while maintaining good ductility. The whole is very suitable for combining high-strength steel and high-strength concrete 4 (for example, forming Figure 3 That is to say, the diameter of the bolt rod is larger than the size of the commonly used bolts specified in the specification, which can greatly improve the shear strength, and because of the design of the split portion 12, the ductility of the entire split bolt 1 can be maintained after the diameter is enlarged.

[0046] Optionally, the split portion 12 is two (eg Figure 6 The third split bolt 1 shown) or four (such as Figure 1 and Figure 4 As shown in the two split-type bolts 1), as long as the gap is filled with the elastic partition material 2, the split part 12 can meet the aspect ratio and can make the split-type bolt 1 maintain ductility. Figure 1 The cylindrical bolt cap shown is also optional. Figure 4 The hexagonal plug cap shown can be determined based on existing materials, and then the existing materials are cut and processed accordingly and filled with elastic separation material 2, which has high flexibility during production.

[0047] Due to the high shear strength, when connecting the same high-strength steel and high-strength concrete 4, the number of split bolts 1 used in this embodiment is greatly reduced compared to ordinary bolts, which also reduces the number of times the bolts are welded to the high-strength steel, making the construction more convenient. At the same time, the construction space is increased, which also ensures the construction safety of workers to a certain extent.

[0048] Furthermore, since the amount of split bolts 1 used is smaller, the nail group effect can be avoided, and the reduction of the overall bearing capacity due to the uneven shear force distribution between the split bolts 1 can be prevented.

[0049] In order to facilitate the construction, the split stud 1 of this embodiment further includes a welded object 3, and the base 11 is welded to the welded object 3, and the welded object 3 is a steel plate, an I-shaped steel, an H-shaped steel or a steel pipe. By directly configuring the welded object 3, the split stud 1 can be directly cast with the high-strength concrete 4 or the ultra-high performance concrete 4 after the formwork is supported, which is more convenient for construction. When welding, arc stud welding or manual arc welding can be used.

[0050] for example Figure 3 In the embodiment, the base 11 is welded to the steel beam. Figure 5 In the embodiment, the base 11 is welded with the corrugated steel plate. The user can select the welded material and the high-strength concrete 4 to be connected.

[0051] In summary, the split bolt 1 of the present application greatly improves the shear strength of the bolt by increasing the diameter of the base 11, meeting the shear force requirements between steel and high-strength or ultra-high performance concrete 4. The upper split part 12 meets the requirement that "the length of the cylindrical head welding bolt connector should not be less than 4 times its rod diameter" and maintains good ductility. It has the advantages of avoiding the group nail effect, convenient construction, reducing the number and height of the bolts, and increasing the shear bearing capacity without reducing the ductility.

[0052] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A split type bolt, characterized in that: include: A base and a plurality of split parts, the base and the plurality of split parts are integrally formed, the split parts include a first part and a second part, one end of the first part is connected to the second part, the other end of the first part is connected to the base, the first parts of the plurality of split parts and the base constitute a bolt rod, the second parts of the plurality of split parts constitute a bolt cap, there is a gap between adjacent split parts, and the gap is filled with elastic separation material.

2. The split type bolt according to claim 1, characterized in that: The slot axially penetrates to the upper end of the base of the stud and radially penetrates the stud.

3. The split type bolt according to claim 1, characterized in that: The overall aspect ratio of the split bolt is 2, and the ratio of the height to the width of the split part is greater than or equal to 4.

4. The split type bolt according to claim 3, characterized in that: The diameter of the bolt rod is 30-50 mm, the diameter of the bolt cap is 45-75 mm, the height of the bolt cap is 12-15 mm, and the overall height of the split bolt is 60-100 mm.

5. The split type bolt according to claim 4, characterized in that: The width of the gap is 4 to 8 mm.

6. The split type bolt according to claim 4, characterized in that: The height of the base is 8 to 16 mm.

7. The split type bolt according to claim 1, characterized in that: The number of the split parts is two or four.

8. The split type bolt according to claim 1, characterized in that: The base and the split part are made of ML15, ML15AL, Q345, Q390, Q420 or Q460.

9. The split type bolt according to claim 1, characterized in that: The gap is filled with aluminum, tin, epoxy resin, caulking agent, sealant, caulking paste or building structural adhesive.

10. The split type bolt according to claim 1, characterized in that: The split bolt further includes an object to be welded, the base is welded to the object to be welded, and the object to be welded is a steel plate, an I-shaped steel, an H-shaped steel or a steel pipe.

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