Connection structure of square tube column and beam

Abstract

The utility model relates to the field of beam-column connection, and discloses a connection structure of a square tube column and a crossbeam, comprising a vertically arranged square tube column, a plurality of crossbeams vertically connected to the square tube column, and a connecting plate connecting the two, and also comprising an upper stiffening plate and a lower stiffening plate arranged in a horizontal direction and sleeved and fixed on the square tube column, wherein each crossbeam is arranged between a group of upper stiffening plates and lower stiffening plates, and is fixedly connected to the two. The utility model arranges the upper stiffening plate and the lower stiffening plate at the connection between the square tube column and the crossbeam, has a simple and effective structure, and has the beneficial effect of strengthening the stability of the connection.

Description

Technical Field

[0001] The utility model relates to the field of beam-column connection, in particular to a connection structure of a square tube column and a crossbeam. Background Art

[0002] Small power station boilers, such as waste heat utilization boilers, have a small load on the overall structure of the boiler and are relatively short in height, so that the cross-section of the steel frame columns can be designed to be smaller. In order to shorten the processing cycle and save manufacturing costs, the steel frame columns of this type of boiler will choose to use finished cold-bent hollow square tubes. Because the square tube is a finished product, it is impossible to strengthen its interior without destroying the profile structure. The square tube and the horizontal beam are usually connected by a connecting plate. This connection is a concentrated load point, which is prone to rupture due to excessive concentrated loads, and in severe cases, the beam falls off. Utility Model Content

[0003] In order to overcome the problem of cracking at the connection between the horizontal beam and the column in the above-mentioned background technology due to excessive concentrated load, the utility model provides a connection structure between the square tube column and the cross beam, and the connection structure is provided with an upper stiffening plate and a lower stiffening plate at the connection between the square tube column and the cross beam, which has the beneficial effect of simple and effective structure and enhanced stability of the connection.

[0004] The technical solution of the utility model is as follows:

[0005] A connection structure of square tube columns and crossbeams, comprising vertically arranged square tube columns, a plurality of crossbeams vertically connected to the square tube columns and a connecting plate connecting the two, and also comprising upper and lower stiffening plates arranged in the horizontal direction and sleeved and fixed on the square tube columns, wherein each crossbeam is arranged between a group of upper and lower stiffening plates and fixedly connected to the two.

[0006] Preferably, the upper stiffened plate comprises two concave-shaped half stiffened plates, the two half stiffened plates are welded and fixed together, and the inner sides of the grooves of the two are respectively welded to the square tube columns.

[0007] Further preferably, the weld height of the welding place between the semi-reinforced plate and the square tube column is not less than 0.85 times the thickness of the thinnest steel plate, and the joint of the two semi-reinforced plates adopts single-sided groove welding.

[0008] Preferably, the lower reinforced plate includes a concave rib plate and a positioning bracket, the positioning bracket includes a bracket cover plate, the bracket cover plate is welded and fixed in the groove of the concave rib plate, and the square tube column is located in the U-shaped structure formed by the concave rib plate and the bracket cover plate and is welded and fixed to the two.

[0009] Further preferably, the concave rib plate and the bracket cover plate are located in the same horizontal plane, and the two are fixedly connected by single-sided groove welding.

[0010] Further preferably, the weld height of the square tube column at the circumferential welding points with the concave rib plate and the bracket cover plate is not less than 0.85 times the thickness of the thinnest steel plate.

[0011] Further preferably, the positioning bracket also includes a bracket rib located below the bracket cover and integrally connected thereto, the bracket rib being a vertically arranged right-angled triangular plate structure, and being vertically fixedly connected to the bracket cover and the square tube column at the same time, the number of the bracket ribs being no less than 2, and being evenly arranged along the length direction of the bottom surface of the bracket cover.

[0012] Further preferably, the upper surface of the bracket cover plate is welded and fixed to the bottom surface of the beam.

[0013] Compared with the prior art, the beneficial effects of this technical solution are:

[0014] The structure of the present application strengthens the upper and lower surfaces of the connection between the square tube column and the beam by arranging upper and lower stiffened plates, thereby ensuring the strength and stability of the connection and suppressing the upward stress of the connection, thereby avoiding the problem of the connection breaking or even the beam falling off due to excessive concentrated load. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be described with reference to the accompanying drawings, in which:

[0016] Figure 1 It is a front view of the utility model as a whole;

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the structure at AA in the middle (the crossbeam is not shown in the figure);

[0018] Figure 3 For this utility model Figure 1 Schematic diagram of the structure at the middle BB (the crossbeam is not shown in the figure);

[0019] Figure 4 It is a top view of the utility model (the upper stiffening plate and the lower stiffening plate are not shown in the figure);

[0020] Figure 5 It is a cross-sectional view of the beam of the utility model.

[0021] Figure numerals: square tube column 1, cross beam 2, upper flange 21, lower flange 22, web 23, upper stiffened plate 3, half stiffened plate 31, joint 32, lower stiffened plate 4, concave stiffened plate 40, positioning bracket 41, bracket cover plate 411, bracket rib plate 412, concave stiffened plate 42, connecting plate 5. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] Example 1: Figures 1 to 5 The connection structure of the square tube column and the cross beam shown in the figure comprises a vertically arranged square tube column 1 and a plurality of cross beams 2 horizontally fixed to the side of the square tube column 1. The cross beams 2 are evenly arranged along the length direction of the square tube column 1. Figure 5 As shown, the cross beam 2 is an I-shaped structure in cross section, including an upper flange 21, a lower flange 22 and a web 23 connecting the two. Figure 4 As shown, the web 23 is clamped and fixed between two connecting plates 5, and the inner end surface of the connecting plate 5 is fixedly connected to the side of the square tube column 1, so that the cross beam 2 is fixedly connected to the square tube column 1 through the connecting plate 5. However, this connection method will cause the concentrated load at the connection to be too large, which may cause rupture. Therefore, an upper stiffening plate 3 and a lower stiffening plate 4 that are sleeved and fixed on the square tube column 1 are fixed above the upper flange 21 and below the lower flange 22, respectively. Each cross beam 2 is arranged between a group of upper stiffening plates 3 and lower stiffening plates 4, wherein the top surface of the upper flange 21 is fixedly connected to the bottom surface of the upper stiffening plate 3, and the bottom surface of the lower flange 22 is fixedly connected to the top surface of the lower stiffening plate 4. This design strengthens the upper and lower surfaces of the connection between the square tube column 1 and the beam 2 by arranging an upper stiffening plate 3 and a lower stiffening plate 4 on the upper and lower surfaces of the connection, thereby ensuring the connection strength and stability there and suppressing the upward stress, thus overcoming the problem of the connection breaking due to excessive concentrated load and, in severe cases, the beam 2 falling off.

[0024] Embodiment 2: Based on Embodiment 1, the connection mode of the upper stiffened plate 3 is optimally designed, such as Figure 2 As shown, the upper stiffened plate 3 includes two concave-shaped half-stiffened plates 31, which are connected to form a U-shaped structure. The inner sides of the concave parts of the two plates are respectively welded and fixed to the column body of the square tube column 1. The two half-stiffened plates 31 are on the same horizontal plane, and the top surface of one of the half-stiffened plates 31 is welded and fixed to the bottom surface of the upper flange 21 of the crossbeam 2. By dividing the upper stiffened plate 3 into two half-stiffened plates 31 respectively fixed to the square tube column 1, it is more convenient for actual construction and installation. The weld height of the half-stiffened plate 31 and the square tube column 1 is not less than 0.85 times the thickness of the thinnest steel plate, and the thickness of the thinnest steel plate is 6mm, so as to ensure the stability of the weld. The joint 32 of the two half-stiffened plates 31 is welded and fixed, and a single-sided groove welding is adopted. The single-sided groove welding can ensure that the weld strength of the weld is equivalent to the strength of the parent material, improve the reduction coefficient of the weld, and avoid cracks in the weld.

[0025] Embodiment 3: Based on Embodiment 1, the lower stiffened plate 4 is optimally designed. The lower stiffened plate 4 includes a positioning bracket 41 and a concave rib plate 40 of a concave structure. The concave rib plate 40 is arranged horizontally. The positioning bracket 41 includes a bracket cover plate 411 and a bracket rib plate 412. Figure 3 As shown, the bracket cover plate 411 is a square block structure and is welded and fixed in the groove of the concave rib plate 40. The two form a U-shaped structure, and the column body of the square tube column 1 is welded and fixed in the U-shaped structure composed of the two. In actual use, the positioning bracket 41 is first welded to the column body of the square tube column 1, and then the concave rib plate 40, the square tube column 1 and the bracket cover plate 411 are welded and fixed, which is more convenient for actual construction and installation. The positioning bracket 41 also has a positioning function, which can locate the installation position of the beam 2 to ensure that the installation position of the beam 2 on the square tube column 1 is uniform and orderly.

[0026] Furthermore, the concave rib plate 40 and the bracket cover plate 411 are located on the same horizontal plane, and the two are fixedly connected by single-sided groove welding, which can ensure that the weld strength at the weld is equivalent to the strength of the parent material, increase the reduction factor of the weld, and avoid cracking at the weld. The weld height of the square tube column 1 and the concave rib plate 40 and the bracket cover plate 411 is not less than 0.85 times the thickness of the thinnest steel plate, and the thickness of the thinnest steel plate is 6mm, to ensure the stability of the weld.

[0027] Furthermore, the bracket rib plate 412 is integrally connected with the bracket cover plate 411, such as Figure 1 The vertically arranged right-angled triangular plate structure is vertically fixedly connected to the bracket cover plate 411 and the square tube column 1 at the same time, wherein the horizontal right-angled side surface of the bracket rib plate 412 is welded and fixed to the bottom surface of the bracket cover plate 411, and the vertical right-angled side surface is fixedly connected to the side surface of the square tube column 1, wherein the number of the bracket rib plates 412 is not less than 2, and they are evenly arranged along the length direction of the bottom surface of the bracket cover plate 411, and the number in this embodiment is 2, and the arrangement of the bracket rib plates 412 improves the overall load-bearing capacity of the lower stiffened plate 4. The upper surface of the bracket cover plate 411 is welded and fixed to the bottom surface of the lower flange 22 of the beam 2. Since the bracket rib plate 412 is a right-angled triangular plate structure, the triangle has stability, so the lower flange 22 of the beam 2 is fixed to the positioning bracket 41, which further improves the support capacity of the lower stiffened plate 4 to the beam 2 and strengthens the firmness of the connection between the square tube column 1 and the beam 2.

[0028] The above embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A connection structure of a square tube column and a crossbeam, comprising a vertically arranged square tube column (1), a plurality of crossbeams (2) vertically connected to the square tube column (1), and a connecting plate (5) connecting the two, characterized in that: It also includes an upper stiffening plate (3) and a lower stiffening plate (4) arranged in a horizontal direction and sleeved and fixed on the square tube column (1), wherein each cross beam (2) is arranged between a group of upper stiffening plates (3) and lower stiffening plates (4) and is fixedly connected to the two.

2. The connection structure of the square tube column and the crossbeam according to claim 1 is characterized in that: The upper stiffened plate (3) comprises two concave-shaped half stiffened plates (31), the two half stiffened plates (31) are welded and fixed together, and the inner sides of the grooves of the two are respectively welded to the square tube columns (1).

3. The connection structure of the square tube column and the crossbeam according to claim 2 is characterized in that: The weld height of the semi-reinforced plate (31) and the square tube column (1) is not less than 0.85 times the thickness of the thinnest steel plate, and the joint (32) of the two semi-reinforced plates (31) is welded by single-sided groove welding.

4. The connection structure of the square tube column and the crossbeam according to claim 1 is characterized in that: The lower stiffened plate (4) comprises a concave rib plate (40) and a positioning bracket (41), the positioning bracket (41) comprises a bracket cover plate (411), the bracket cover plate (411) is welded and fixed in the groove of the concave rib plate (40), and the square tube column (1) is located in the U-shaped structure formed by the concave rib plate (40) and the bracket cover plate (411) and is welded and fixed to the two.

5. The connection structure of the square tube column and the crossbeam according to claim 4 is characterized in that: The concave rib plate (40) and the bracket cover plate (411) are located on the same horizontal plane, and the two are fixedly connected by single-sided groove welding.

6. The connection structure of the square tube column and the crossbeam according to claim 4 is characterized in that: The weld height of the square tube column (1) at the circumferential welding point with the concave rib plate (40) and the bracket cover plate (411) is not less than 0.85 times the thickness of the thinnest steel plate.

7. The connection structure of the square tube column and the crossbeam according to claim 4 is characterized in that: The positioning bracket (41) further comprises a bracket rib plate (412) located below the bracket cover plate (411) and connected thereto in one piece. The bracket rib plate (412) is a vertically arranged right-angled triangular plate structure and is vertically fixedly connected to the bracket cover plate (411) and the square tube column (1). The number of the bracket rib plates (412) is not less than 2 and they are evenly arranged along the length direction of the bottom surface of the bracket cover plate (411).

8. The connection structure of the square tube column and the crossbeam according to claim 7 is characterized in that: The upper surface of the bracket cover plate (411) is welded and fixed to the bottom surface of the crossbeam (2).

Images