Bolt side plate reinforcing structure and method of T-shaped rectangular steel pipe tubular joint

Abstract

The invention discloses a bolt side plate reinforcing structure and method for a T-shaped rectangular steel pipe tubular joint, and the method comprises the following steps: S1, prefabricating a first assembly type side plate and a second assembly type side plate according to the sizes of a main pipe and a branch pipe of the tubular joint to be reinforced, and respectively forming orifices in the first assembly type side plate and the second assembly type side plate; s2, through holes are formed in the two side walls of the main pipe correspondingly, and the positions and the shapes of the through holes correspond to the positions and the shapes of the hole openings; and S3, the first assembly type side plate and the second assembly type side plate are spliced to the two sides of the main pipe in the joint area in the axis direction of the main pipe, and a bolt sequentially penetrates through a hole opening of the first assembly type side plate, through holes in the two side walls of the main pipe and a hole opening of the second assembly type side plate and then is fixed through a nut. The local corrosion condition caused by long-term service of the existing T-shaped steel pipe tubular joint can be improved, meanwhile, the stress concentration phenomenon caused by welding of the main pipe and the branch pipe is eliminated, the overall structural design is reasonable, and construction is convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and particularly relates to a bolt side plate reinforcement structure and reinforcement method for a T-shaped rectangular steel pipe intersecting node. Background Art

[0002] Due to its excellent mechanical properties, steel pipe structures are widely used in representative infrastructure and various public and civil engineering projects. However, in actual projects, the most commonly used directly welded connection nodes (i.e., intersecting nodes) of steel pipe structures often exhibit stress concentration and other situations in the weld area, and the bearing capacity of intersecting nodes is relatively low (mostly lower than the bearing capacity of adjacent members). In addition, some steel pipe intersecting nodes also face adverse situations such as local corrosion due to long-term service. All these situations urgently require strengthening the bearing capacity of steel pipe structure nodes.

[0003] In response to the reinforcement requirements of existing steel pipe intersecting nodes, existing technologies include adding stiffening plates externally, pouring concrete internally, and welding stiffening plates internally, etc. Among them, pouring concrete internally increases the self-weight of the structure and also requires cutting and grooving the existing steel pipes, which will cause damage to the existing structure; welding stiffening plates internally poses construction difficulties for existing steel pipe intersecting nodes. Therefore, the method of adding stiffening plates externally is commonly used to reinforce existing nodes, but external welding of stiffening plates still has problems such as complex construction operations and limited reinforcement effects. Therefore, it is urgent to improve the existing reinforcement methods. Summary of the Invention

[0004] The purpose of the present invention is to provide a bolt side plate reinforcement structure and reinforcement method for a T-shaped rectangular steel pipe intersecting node, which solves at least one of the technical problems existing in the prior art.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A bolt side plate reinforcement method for a T-shaped rectangular steel pipe intersecting node of the present invention includes the following steps:

[0007] S1. According to the sizes of the main pipe and the branch pipe of the intersecting node to be reinforced, prefabricate a first assembled side plate and a second assembled side plate in a factory. n + 1 orifices are provided on one side of the first assembled side plate and the second assembled side plate close to the branch pipe, and n orifices are provided on the side of the first assembled side plate and the second assembled side plate far from the branch pipe;

[0008] S2. Open 2n + 1 through holes on both side walls of the main pipe, and the positions and shapes of the through holes correspond to the positions and shapes of the orifices;

[0009] S3. The first prefabricated side plate and the second prefabricated side plate are spliced on both sides of the main pipe along the axial direction of the main pipe in the joint area. Bolts are sequentially passed through the orifices of the first prefabricated side plate, the through holes on both side walls of the main pipe, and the orifices of the second prefabricated side plate, and then fixed with nuts to fix the first prefabricated side plate and the second prefabricated side plate on both side walls of the main pipe.

[0010] Further, both the main pipe and the branch pipe are rectangular steel pipes, and the planar states of the first prefabricated side plate and the second prefabricated side plate are both rectangular.

[0011] Further, the thickness of the first prefabricated side plate and the second prefabricated side plate is 1 - 2 times the thickness of the main pipe.

[0012] Further, the height of the first prefabricated side plate and the second prefabricated side plate is the same as the height of the main pipe.

[0013] Still further, there are 3 orifices on the side of the first prefabricated side plate and the second prefabricated side plate close to the branch pipe, and 2 orifices on the side of the first prefabricated side plate and the second prefabricated side plate far from the branch pipe, and the number of bolts is 5.

[0014] Further, the lengths of the first prefabricated side plate and the second prefabricated side plate are sufficient to cover the yield line of the intersecting joint.

[0015] The present invention also provides a bolt side plate reinforcement structure for a T-shaped rectangular steel pipe intersecting joint, including a main pipe, a branch pipe, a first prefabricated side plate, a second prefabricated side plate, and bolts. The branch pipe is vertically arranged on the main pipe, the central axis of the branch pipe and the central axis of the main pipe are in the same plane, the first prefabricated side plate and the second prefabricated side plate are symmetrically arranged on both sides of the main pipe, there are n + 1 orifices on the side of the first prefabricated side plate and the second prefabricated side plate close to the branch pipe, there are n orifices on the side of the first prefabricated side plate and the second prefabricated side plate far from the branch pipe, 2n + 1 through holes are correspondingly arranged on both side walls of the main pipe, and the first prefabricated side plate and the second prefabricated side plate are fixed on both side walls of the main pipe through the bolts.

[0016] Further, both the main pipe and the branch pipe are rectangular steel pipes, and the planar states of the first prefabricated side plate and the second prefabricated side plate are both rectangular.

[0017] Further, the thickness of the first prefabricated side plate and the second prefabricated side plate is 1 - 2 times the thickness of the main pipe, and the height of the first prefabricated side plate and the second prefabricated side plate is the same as the height of the main pipe.

[0018] Furthermore, there are 3 orifices provided on one side of the first prefabricated side plate and the second prefabricated side plate close to the branch pipe, and 2 orifices provided on the side of the first prefabricated side plate and the second prefabricated side plate away from the branch pipe, and the number of the bolts is 5.

[0019] Further, the yield strength of the first prefabricated side plate and the second prefabricated side plate is similar to or slightly higher than that of the main pipe.

[0020] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0021] The bolt side plate reinforcement structure and reinforcement method for the T-shaped rectangular steel pipe penetrator node of the present invention are provided with a first prefabricated side plate and a second prefabricated side plate outside the T-shaped rectangular steel pipe penetrator node and are reinforced by bolt connection. Due to its light self-weight, the construction operation is made convenient, and no additional burden is imposed on the original node. The reinforcement effect is good, and it is applicable to the reinforcement and repair of existing T-shaped rectangular steel pipe penetrator nodes. At the same time, the arrangement of the first prefabricated side plate and the second prefabricated side plate increases the thickness of the side wall of the main pipe, thereby significantly improving the bearing capacity of the original node. In addition, the T-shaped node often causes the side wall of the main pipe to bulge and deform under the action of the axial pressure of the branch pipe, while the bolts in the present invention can significantly reduce this deformation, thereby improving the bearing capacity and stiffness of the node.

[0022] The bolt side plate reinforcement structure and reinforcement method for the T-shaped rectangular steel pipe penetrator node of the present invention can improve the local corrosion condition of the existing T-shaped steel pipe penetrator node caused by long-term service, and at the same time eliminate the stress concentration phenomenon caused by welding of the main and branch pipes. And due to its excellent mechanical properties, simple structure and light self-weight, it is also applicable to the reinforcement of the strengthened nodes of the steel pipe structure in the design stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order 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 embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a three-dimensional structure schematic diagram of the bolt side plate reinforcement structure for the T-shaped rectangular steel pipe penetrator node of the present invention;

[0025] Figure 2 It is an elevation structure schematic diagram of the bolt side plate reinforcement structure for the T-shaped rectangular steel pipe penetrator node of the present invention;

[0026] Figure 3Schematic side view structure diagram of the bolt side plate reinforcement method for the T-shaped rectangular steel pipe concrete-filled steel tubular joint of the present invention;

[0027] Figure 4 Schematic top view structure diagram of the bolt side plate reinforcement method for the T-shaped rectangular steel pipe concrete-filled steel tubular joint of the present invention.

[0028] Explanation of reference numerals: 1, main pipe; 2, branch pipe; 3, first assembled side plate; 4, second assembled side plate; 5, bolt; 6, yield line. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0031] In the description of the present 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 may be a fixed connection, a detachable connection or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the drawings.

[0033] Embodiment 1

[0034] As Figures 1 to 4 shown, the bolt side plate reinforcement method for the T-shaped rectangular steel pipe concrete-filled steel tubular joint of Embodiment 1 of the present invention includes the following steps:

[0035] S1. According to the dimensions of the main pipe 1 and the branch pipe 2 of the intersecting joint to be strengthened, prefabricate the first assembled side plate 3 and the second assembled side plate 4 in the factory. Among them, n + 1 orifices are provided on the side of the first assembled side plate 3 and the second assembled side plate 4 close to the branch pipe 2, and n orifices are provided on the side of the first assembled side plate 3 and the second assembled side plate 4 far from the branch pipe 2.

[0036] S2. Open 2n + 1 through holes on the two side walls of the main pipe 1 respectively. The positions and shapes of the through holes correspond to the positions and shapes of the orifices.

[0037] S3. The first assembled side plate 3 and the second assembled side plate 4 are spliced on both sides of the main pipe 1 along the axial direction of the main pipe 1 in the joint area. The bolts 5 are sequentially passed through the orifices of the first assembled side plate 3, the through holes on the two side walls of the main pipe 1, and the orifices of the second assembled side plate 4 and then fixed by nuts, so as to fix the first assembled side plate 3 and the second assembled side plate 4 on the two side walls of the main pipe 1.

[0038] In this Embodiment 1, both the main pipe 1 and the branch pipe 2 are rectangular steel pipes, and the planar states of the first assembled side plate 3 and the second assembled side plate 4 are both rectangular.

[0039] Preferably, the thickness of the first assembled side plate 3 and the second assembled side plate 4 is 1 - 2 times the thickness of the main pipe 1, and the height of the first assembled side plate 3 and the second assembled side plate 4 is the same as the height of the main pipe 1.

[0040] Specifically, 3 orifices are provided on the side of the first assembled side plate 3 and the second assembled side plate 4 close to the branch pipe 2, 2 orifices are provided on the side of the first assembled side plate 3 and the second assembled side plate 4 far from the branch pipe 2, and the number of bolts 5 is 5. At this time, when the first assembled side plate 3 and the second assembled side plate 4 are assembled, the side close to the branch pipe 2 is the main load-bearing area. Therefore, three orifices are arranged in the same row, and two orifices are arranged on the side far from the branch pipe 2, which play a role in fixing and bearing a certain amount of load.

[0041] And, as Figure 4 shown, the lengths of the first assembled side plate 3 and the second assembled side plate 4 are sufficient to cover the yield line 6 of the intersecting joint.

[0042] The bolt side plate reinforcement structure and reinforcement method for the T-shaped rectangular steel pipe intersecting joint of the present invention are to set the first assembled side plate and the second assembled side plate outside the T-shaped rectangular steel pipe intersecting joint and reinforce them through bolt connection. Due to its light self-weight, the convenience of construction operation is realized, and no additional burden is generated on the original joint. The reinforcement effect is good, and it is suitable for the reinforcement and repair of existing T-shaped rectangular steel pipe intersecting joints. At the same time, the setting of the first assembled side plate and the second assembled side plate increases the thickness of the side wall of the main pipe 1, thereby significantly improving the bearing capacity of the original joint. In addition, the T-shaped joint often causes the side wall of the main pipe 1 to bulge and deform under the action of axial pressure, while the bolts in the present invention can significantly reduce this deformation, thereby improving the strength and stiffness of the joint.

[0043] Embodiment 2

[0044] As Figures 1 to 4 shown, the bolt side plate reinforcement structure of the T-shaped rectangular steel pipe intersecting joint in this Embodiment 2 includes a main pipe 1, a branch pipe 2, a first assembled side plate 3, a second assembled side plate 4 and bolts 5. The branch pipe 2 is vertically arranged on the main pipe 1, and the central axis of the branch pipe 2 and the central axis of the main pipe 1 are in the same plane. The first assembled side plate 3 and the second assembled side plate 4 are symmetrically arranged on both sides of the main pipe 1. Among them, n + 1 orifices are arranged on the side of the first assembled side plate 3 and the second assembled side plate 4 close to the branch pipe 2, and n orifices are arranged on the side of the first assembled side plate 3 and the second assembled side plate 4 far from the branch pipe 2. 2n + 1 through holes are correspondingly arranged on both side walls of the main pipe 1. The first assembled side plate 3 and the second assembled side plate 4 are fixed on both side walls of the main pipe 1 through bolts 5.

[0045] In this Embodiment 2, both the main pipe 1 and the branch pipe 2 are rectangular steel pipes, and the planar states of the first assembled side plate 3 and the second assembled side plate 4 are both rectangular.

[0046] Preferably, the thickness of the first assembled side plate 3 and the second assembled side plate 4 is 1 - 2 times the thickness of the main pipe 1, and the height of the first assembled side plate 3 and the second assembled side plate 4 is the same as the height of the main pipe 1.

[0047] Specifically, 3 orifices are arranged on the side of the first assembled side plate 3 and the second assembled side plate 4 close to the branch pipe 2, 2 orifices are arranged on the side of the first assembled side plate 3 and the second assembled side plate 4 far from the branch pipe 2, and the number of bolts 5 is 5. At this time, when the first assembled side plate 3 and the second assembled side plate 4 are assembled, the side close to the branch pipe 2 is the main load-bearing area. Therefore, three orifices are arranged in the same row, and two orifices are arranged on the side far from the branch pipe 2 to play a fixing role and a role in bearing load to a certain extent.

[0048] And, as Figure 4As shown, the lengths of the first prefabricated side plate 3 and the second prefabricated side plate 4 are sufficient to cover the yield line 6 of the intersecting joint.

[0049] In addition, the yield strength of the first prefabricated side plate 3 and the second prefabricated side plate 4 is similar to or slightly higher than the yield strength of the main pipe 1.

[0050] The bolted side plate reinforcement structure and reinforcement method for the T-shaped rectangular steel pipe intersecting joint of the present invention can improve the local corrosion condition of the existing T-shaped steel pipe intersecting joint caused by long-term service, and at the same time eliminate the stress concentration phenomenon that appears due to welding of the main and branch pipes. Moreover, due to its excellent mechanical properties, simple structure and light self-weight, it is also applicable to the reinforcement of the strengthened nodes of the steel pipe structure in the design stage.

[0051] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. The bolt side plate reinforcement method for T-shaped rectangular steel tube intersecting joints is characterized in that It includes the following steps: S1. According to the dimensions of the main pipe (1) and the branch pipe (2) of the concrete-filled steel tubular joint to be strengthened, prefabricate a first prefabricated side plate (3) and a second prefabricated side plate (4) in the factory. n + 1 orifices are arranged on one side of the first prefabricated side plate (3) and the second prefabricated side plate (4) close to the branch pipe (2), and n orifices are arranged on the side of the first prefabricated side plate (3) and the second prefabricated side plate (4) far from the branch pipe (2); S2. 2n + 1 through holes are respectively formed on two side walls of the main pipe (1), and the positions and shapes of the through holes correspond to the positions and shapes of the orifices; S3. The first prefabricated side plate (3) and the second prefabricated side plate (4) are spliced on both sides of the main pipe (1) along the axial direction of the main pipe (1) in the joint area. Bolts (5) are sequentially passed through the orifices of the first prefabricated side plate (3), the through holes on two side walls of the main pipe (1), and the orifices of the second prefabricated side plate (4), and then fixed by nuts, so as to fix the first prefabricated side plate (3) and the second prefabricated side plate (4) on two side walls of the main pipe (1).

2. The bolt side plate reinforcement method for the T-shaped rectangular steel pipe intersecting node according to claim 1, characterized in that, Both the main pipe (1) and the branch pipe (2) are rectangular steel pipes, and the planar states of the first prefabricated side plate (3) and the second prefabricated side plate (4) are both rectangular.

3. The bolt side plate reinforcement method for the T-shaped rectangular steel tube intersecting node according to claim 1, characterized in that, The thickness of the first prefabricated side plate (3) and the second prefabricated side plate (4) is 1 - 2 times the thickness of the main pipe (1).

4. The bolt side plate reinforcement method for the T-shaped rectangular steel pipe intersecting joint according to claim 1, characterized in that, The height of the first prefabricated side plate (3) and the second prefabricated side plate (4) is the same as the height of the main pipe (1).

5. The bolt side plate reinforcement method for the T-shaped rectangular steel pipe intersecting node according to claim 1, characterized in that, 3 orifices are arranged on one side of the first prefabricated side plate (3) and the second prefabricated side plate (4) close to the branch pipe (2), 2 orifices are arranged on the side of the first prefabricated side plate (3) and the second prefabricated side plate (4) far from the branch pipe (2), and the number of the bolts (5) is 5.

6. The bolt side plate reinforcement method for the T-shaped rectangular steel pipe intersecting joint according to any one of claims 1-5, characterized in that, The lengths of the first prefabricated side plate (3) and the second prefabricated side plate (4) are sufficient to cover the yield line (6) of the concrete-filled steel tubular joint.

7. Bolt side plate reinforcement structure for T-shaped rectangular steel tube intersecting joints, characterized in that, It includes a main pipe (1), a branch pipe (2), a first prefabricated side plate (3), a second prefabricated side plate (4) and bolts (5). The branch pipe (2) is vertically arranged on the main pipe (1), the central axis of the branch pipe (2) and the central axis of the main pipe (1) are in the same plane. The first prefabricated side plate (3) and the second prefabricated side plate (4) are symmetrically arranged on both sides of the main pipe (1). n + 1 orifices are arranged on one side of the first prefabricated side plate (3) and the second prefabricated side plate (4) close to the branch pipe (2), n orifices are arranged on the side of the first prefabricated side plate (3) and the second prefabricated side plate (4) far from the branch pipe (2), 2n + 1 through holes are correspondingly arranged on two side walls of the main pipe (1), and the first prefabricated side plate (3) and the second prefabricated side plate (4) are fixed on two side walls of the main pipe (1) through the bolts (5).

8. The bolt side plate reinforcement structure of the T-shaped rectangular steel pipe intersecting joint according to claim 7, characterized in that, Both the main pipe (1) and the branch pipe (2) are rectangular steel pipes, and the planar states of the first prefabricated side plate (3) and the second prefabricated side plate (4) are both rectangular.

9. The bolt side plate reinforcement structure of the T-shaped rectangular steel pipe intersecting node according to claim 7, characterized in that, The thickness of the first prefabricated side plate (3) and the second prefabricated side plate (4) is 1-2 times the thickness of the main pipe (1), and the height of the first prefabricated side plate (3) and the second prefabricated side plate (4) is the same as the height of the main pipe (1).

10. The bolt side plate reinforcement structure of the T-shaped rectangular steel pipe intersecting node according to any one of claims 7-9, characterized in that, Three orifices are provided on one side of the first prefabricated side plate (3) and the second prefabricated side plate (4) close to the branch pipe (2), and two orifices are provided on the side of the first prefabricated side plate (3) and the second prefabricated side plate (4) away from the branch pipe (2), and the number of bolts (5) is five.

11. The bolt side plate reinforcement structure of the T-shaped rectangular steel pipe intersecting node according to any one of claims 7-9, characterized in that, The yield strength of the first prefabricated side plate (3) and the second prefabricated side plate (4) is similar to or slightly higher than the yield strength of the main pipe (1).

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