Connecting structure of steel bracket and steel column

Abstract

The invention belongs to the technical field of constructional engineering, and particularly relates to a connecting structure of a steel bracket and a steel column, which is characterized in that the section of the end part of the upper chord of the steel bracket is enlarged to be respectively connected with flanges on two sides of the steel column and a web stiffening plate, and a diagonal web member of the steel bracket is connected with the steel column stiffening plate in a bolt group form; and after the steel bracket upper chord is fixed, the steel bracket lower chord is welded with the steel column stiffening plate in a welding seam manner. And on the other hand, the design of enlarging the section of the end part of the steel bracket greatly improves the out-of-plane stability of the steel bracket, and the upper chord and the lower chord of the steel bracket do not extend into the flange range of the steel column, so that the steel bracket is more convenient and accurate to mount, and the mounting efficiency of the steel bracket is improved. And greater flexibility is provided for making up construction errors.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, and in particular relates to a connection structure between a steel bracket and a steel column. Background Art

[0002] With the market demand and equipment advancement, steel structure workshops increasingly need to arrange large column grids, that is, to remove columns at certain locations. Therefore, when the column spacing is too large, steel brackets need to be installed to support the intermediate roof trusses or roof beams.

[0003] However, in the prior art, it is necessary to drill holes in the web of the steel column when setting up the steel bracket, and the greater the load, the more bolts are needed. The column head section that needs to be strengthened is greatly weakened, and this weakening cannot be considered in the overall calculation. In addition, when the steel bracket is connected to the column, it is connected to the weak axis of the column. It is unreasonable to connect it to only part of the column web and the force transmission is inconsistent with the overall calculation model. Furthermore, since the connection node is on the web of the steel column, the bracket needs to be simultaneously suspended from the top of the steel column to between the column flanges when installing, and the top of the steel column is sealed when it leaves the factory. This requires the column top plate to be cut on site for construction, and the two ends need to be completely fitted on the webs of the steel columns on both sides and then screwed, which requires extremely precise accuracy and is difficult to achieve in actual construction.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a connection structure between a steel bracket and a steel column which has greater strength and does not require cutting during construction, so as to overcome the technical problems mentioned in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A connection structure of a steel bracket and a steel column, comprising a steel column, an upper chord of a steel bracket, and a lower chord of a steel bracket;

[0008] The upper chord of the steel bracket includes a middle section and a column head section, the flanges at both ends of the column head section are flush with the flanges at both ends of the steel column, and the column head section is connected to the steel frame through an upper chord connection device; the upper chord connection device includes a first connection plate, two groups of second connection plates, and a third connection plate, the flanges at both ends of the column head section are connected to the flanges at both ends of the steel column through the first connection plate; the two groups of the second connection plates and the third connection plates are respectively arranged at the web of the steel column, and the third connection plate is clamped between the two groups of the second connection plates, the third connection plate is flush with the web of the column head section, and the third connection plate is connected to the web of the column head section through the two groups of the second connection plates;

[0009] The lower chord of the steel bracket is connected to the steel frame through a lower chord connecting device; the lower chord connecting device includes a fourth connecting plate and a fifth connecting plate, the fourth connecting plate is arranged at the web of the steel column, the fifth connecting plate is vertically arranged on the fourth connecting plate, and the lower chord of the steel bracket is connected to the fifth connecting plate.

[0010] Preferably, it also includes an oblique web member, which is connected to the steel frame through an oblique web connecting device; the oblique web connecting device includes two groups of sixth connecting plates and a seventh connecting plate, the two groups of the sixth connecting plates and the seventh connecting plates are respectively arranged at the web of the steel column, and the seventh connecting plate is clamped between the two groups of the sixth connecting plates, and the end of the oblique web member is provided with an eighth connecting plate, the eighth connecting plate is flush with the seventh connecting plate and is clamped between the two groups of the sixth connecting plates, and the two groups of the sixth connecting plates connect the eighth connecting plate with the seventh connecting plate.

[0011] Preferably, the upper ends of the seventh connecting plate and the eighth connecting plate are arranged on the lower end of the web of the column head section, and the lower ends of the seventh connecting plate and the eighth connecting plate are arranged on the support plate.

[0012] Preferably, the first connecting plate connects the flanges at both ends of the column head section to the flanges at both ends of the steel column by bolt connection.

[0013] Preferably, two groups of the second connecting plates and the third connecting plates are arranged on the web of the steel column by welding.

[0014] Preferably, two groups of second connecting plates are connected to the third connecting plate and the web of the column head section by bolt connection.

[0015] Preferably, the fourth connecting plate is arranged on the web of the steel column by welding.

[0016] Preferably, the fifth connecting plate is vertically arranged on the fourth connecting plate by welding, and the lower chord of the steel bracket is connected to the fifth connecting plate by welding or bolting.

[0017] Preferably, the two groups of the sixth connecting plates and the seventh connecting plates are arranged on the web of the steel column by welding.

[0018] Preferably, the two groups of the sixth connecting plates are connected to the eighth connecting plate and the seventh connecting plate by bolt connection.

[0019] Compared with the prior art, the connection structure between a steel bracket and a steel column proposed in the present invention has the following beneficial effects:

[0020] 1. The present invention connects the steel column to the steel bracket through multiple groups of connecting plates, and most of the connecting plates are arranged on the web of the steel column by welding. In this way, there is no need to open holes on the web of the steel column, which greatly enhances the overall mechanical properties of the steel column.

[0021] 2. The present invention uses the third connecting plate, the fifth connecting plate, and the seventh connecting plate, so that the steel bracket does not need to extend into the web of the steel column during installation, so there is no need to cut the top plate of the steel column during construction, which greatly increases the convenience of construction.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention 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 creative work.

[0024] Figure 1 This is a front view of a connection structure between a steel bracket and a steel column proposed in an embodiment of the present invention.

[0025] Figure 2 A top view of a connection structure between a steel bracket and a steel column proposed in an embodiment of the present invention.

[0026] Figure 3 A structural schematic diagram of a connection structure between a steel bracket and a steel column proposed in an embodiment of the present invention, in which a third connection plate, a fourth connection plate, a fifth connection plate, a seventh connection plate and a ninth connection plate are arranged on the web of the steel column.

[0027] Figure 4 A schematic structural diagram of a connection structure between a steel bracket and a steel column proposed in an embodiment of the present invention, in which a third connection plate is clamped between two groups of second connection plates.

[0028] Figure 5 A structural schematic diagram of a connection structure between a steel bracket and a steel column proposed in an embodiment of the present invention, in which a seventh connection plate is clamped between two groups of sixth connection plates.

[0029] The diagram is as follows:

[0030] 100, steel column; 110, flange; 120, web;

[0031] 200, upper chord of steel bracket; 210, middle section; 220, column head section;

[0032] 300. Steel bracket bottom chord;

[0033] 400, oblique abdominal bar;

[0034] 510, first connecting plate; 520, second connecting plate; 530, third connecting plate; 540, fourth connecting plate; 550, fifth connecting plate; 560, sixth connecting plate; 570, seventh connecting plate; 580, eighth connecting plate; 590, supporting plate;

[0035] 600. Bolts. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0037] like Figure 1-5 As shown, an embodiment of the present invention provides a connection structure between a steel bracket and a steel column 100, comprising a steel column 100, an upper chord 200 of a steel bracket, and a lower chord 300 of a steel bracket;

[0038] The upper chord 200 of the steel bracket includes a middle section 210 and a column head section 220. The flanges 110 at both ends of the column head section 220 are flush with the flanges 110 at both ends of the steel column 100. The column head section 220 is connected to the steel frame through an upper chord connection device. The upper chord connection device includes a first connection plate 510, two sets of second connection plates 520, and a third connection plate 530. The flanges 110 at both ends of the column head section 220 are flush with the flanges 110 at both ends of the steel column 100. 0 are connected by the first connecting plate 510; two groups of the second connecting plates 520 and the third connecting plate 530 are respectively arranged at the web 120 of the steel column 100, and the third connecting plate 530 is sandwiched between the two groups of the second connecting plates 520, the third connecting plate 530 is flush with the web 120 of the column head section 220, and the third connecting plate 530 is connected to the web 120 of the column head section 220 through the two groups of the second connecting plates 520;

[0039] The lower chord 300 of the steel bracket is connected to the steel frame via a lower chord connecting device; the lower chord connecting device includes a fourth connecting plate 540 and a fifth connecting plate 550, the fourth connecting plate 540 is arranged at the web 120 of the steel column 100, and the fifth connecting plate 550 is vertically arranged on the fourth connecting plate 540, and the lower chord 300 of the steel bracket is connected to the fifth connecting plate 550.

[0040] An embodiment of the present invention provides a connection structure between a steel bracket and a steel column 100, which also includes a diagonal web rod 400, and the diagonal web rod 400 is connected to the steel frame through a diagonal web connection device; the diagonal web connection device includes two groups of sixth connecting plates 560 and a seventh connecting plate 570, and the two groups of the sixth connecting plates 560 and the seventh connecting plates 570 are respectively arranged at the web 120 of the steel column 100, and the seventh connecting plate 570 is clamped between the two groups of the sixth connecting plates 560, and the end of the diagonal web rod 400 is provided with an eighth connecting plate 580, and the eighth connecting plate 580 is flush with the seventh connecting plate 570 and is clamped between the two groups of the sixth connecting plates 560, and the two groups of the sixth connecting plates 560 connect the eighth connecting plate 580 with the seventh connecting plate 570.

[0041] An embodiment of the present invention provides a connection structure between a steel bracket and a steel column 100, wherein the upper ends of the seventh connecting plate 570 and the eighth connecting plate 580 are arranged at the lower end of the web 120 of the column head section 220, and the lower ends of the seventh connecting plate 570 and the eighth connecting plate 580 are arranged on the support plate 590.

[0042] In a connection structure between a steel bracket and a steel column 100 provided in an embodiment of the present invention, the first connection plate 510 connects the flanges 110 at both ends of the column head section 220 with the flanges 110 at both ends of the steel column 100 by means of bolts 600. Two groups of the second connection plates 520 and the third connection plates 530 are arranged at the web 120 of the steel column 100 by means of welding. Two groups of the second connection plates 520 connect the third connection plates 530 with the web 120 of the column head section 220 by means of bolts 600. The fourth connection plate 540 is arranged at the web 120 of the steel column 100 by means of welding. The fifth connection plate 550 is vertically arranged on the fourth connection plate 540 by means of welding, and the lower chord 300 of the steel bracket is connected to the fifth connection plate 550 by means of welding or bolts 600. Two groups of the sixth connection plates 560 and the seventh connection plates 570 are arranged at the web 120 of the steel column 100 by means of welding. The two groups of the sixth connecting plates 560 are connected to the eighth connecting plate 580 and the seventh connecting plate 570 by means of bolts 600 .

[0043] In addition, in a connection structure between a steel bracket and a steel column provided in an embodiment of the present invention, a specific calculation method for connecting the steel bracket and the steel column is as follows:

[0044] 1. Number of bolts for steel bracket:

[0045] Where: N vb -- Design value of shear bearing capacity of a single high-strength bolt (where the bolt hole is a standard hole type);

[0046] 2. Length of weld seam of lower chord of steel bracket (cm):

[0047] Where: 0.9 - For high altitude installation welds with poor construction conditions, the design value of the bearing capacity should be multiplied by a factor of 0.9;

[0048] m--Number of welds.

[0049] --The design value of the bearing capacity of each 1cm long right-angle fillet weld.

[0050] F 上 --Strength on the steel bracket.

[0051] F 下 --The lower chord force of the steel bracket.

[0052] 3. Calculation of bolts for diagonal braces of steel brackets:

[0053] N=F 斜 ×cosθ

[0054] V=F 斜 ×sinθ

[0055] M1=F 斜 ×d1

[0056] M2=F 斜 ×d2

[0057]

[0058] Where: F 斜 --Axial force of the diagonal web of the steel bracket.

[0059] N--A1 / A2 bolt group through F 斜 Decomposed horizontal force.

[0060] V--A1 / A2 bolt group through F 斜 Decomposed vertical force.

[0061] M1--A1 bolt group center is F 斜 The bending moment generated.

[0062] M2--A2 bolt group center is F 斜 The bending moment generated.

[0063] θ--The angle between the diagonal web of the steel bracket and the horizontal direction.

[0064] d1--The vertical distance between the center of A1 bolt group and the diagonal web of the steel bracket.

[0065] d2--The vertical distance between the center of A2 bolt group and the diagonal web of the steel bracket.

[0066] N 1x --Horizontal force N applied to a single bolt in the A1 / A2 bolt group

[0067] N 1y --Vertical force on a single bolt in the A1 / A2 bolt group under the action of V.

[0068] N 2x --The maximum horizontal force that a single bolt in the A1 / A2 bolt group is subjected to under the action of M1.

[0069] N 2y --The maximum vertical force that a single bolt in the A1 / A2 bolt group is subjected to under the action of M2.

[0070] N v --In the A1 / A2 bolt group, a single bolt is 斜 The maximum shear force under action.

[0071] m--Number of welds.

[0072] l--Weld length of the steel bracket diagonal web (cm).

[0073] n--Number of bolts in A1 / A2 bolt group.

[0074] 4. Calculation of the node plate connecting the diagonal web of the steel bracket and the steel column:

[0075]

[0076] Where: b s --The overhanging width of the steel column stiffener (mm). In this node, it is half of the width of the steel column flange.

[0077] h0--Calculated height of steel column web (mm).

[0078] t s --Minimum thickness of stiffener (mm), which should be greater than the thickness of diagonal web of steel bracket.

[0079] In a connection structure between a steel bracket and a steel column provided by an embodiment of the present invention, the cross-section of the ends of the upper chord of the steel bracket is enlarged and connected to the flanges on both sides of the steel column and the web stiffening plate, and the diagonal web rod of the steel bracket is connected to the steel column stiffening plate in the form of a bolt group. No hole is required in the steel column. After the upper chord of the steel bracket is fixed, the lower chord of the steel bracket is welded to the steel column stiffening plate in the form of a weld. Most of the vertical and horizontal forces transmitted from the steel bracket are transmitted to the steel column from here, making the node processing clearer and the force more reasonable. On the other hand, the design of increasing the cross-section of the end of the steel bracket greatly increases the out-of-plane stability of the steel bracket, and the upper and lower chords of the steel bracket do not extend into the flange range of the steel column, making the installation of the steel bracket more convenient and accurate, and also providing greater flexibility for compensating for construction errors.

[0080] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", 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 of the invention is usually placed when in use. They are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0081] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0082] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A connection structure between a steel bracket and a steel column, It is characterized in that It includes steel columns, steel bracket upper chords, and steel bracket lower chords; The upper chord of the steel bracket includes a middle section and a column head section, the flanges at both ends of the column head section are flush with the flanges at both ends of the steel column, and the column head section is connected to the steel frame through an upper chord connection device; the upper chord connection device includes a first connection plate, two groups of second connection plates, and a third connection plate, the flanges at both ends of the column head section are connected to the flanges at both ends of the steel column through the first connection plate; the two groups of the second connection plates and the third connection plates are respectively arranged at the web of the steel column, and the third connection plate is clamped between the two groups of the second connection plates, the third connection plate is flush with the web of the column head section, and the third connection plate is connected to the web of the column head section through the two groups of the second connection plates; The lower chord of the steel bracket is connected to the steel frame through a lower chord connecting device; the lower chord connecting device includes a fourth connecting plate and a fifth connecting plate, the fourth connecting plate is arranged at the web of the steel column, the fifth connecting plate is vertically arranged on the fourth connecting plate, and the lower chord of the steel bracket is connected to the fifth connecting plate.

2. A connection structure between a steel bracket and a steel column according to claim 1, It is characterized in that It also includes an oblique web member, which is connected to the steel frame via an oblique web connecting device; the oblique web connecting device includes two groups of sixth connecting plates and a seventh connecting plate, the two groups of the sixth connecting plates and the seventh connecting plates are respectively arranged at the webs of the steel columns, and the seventh connecting plate is clamped between the two groups of the sixth connecting plates, and an eighth connecting plate is arranged at the end of the oblique web member, the eighth connecting plate is flush with the seventh connecting plate and is clamped between the two groups of the sixth connecting plates, and the two groups of the sixth connecting plates connect the eighth connecting plate with the seventh connecting plate.

3. The connection structure between a steel bracket and a steel column according to claim 2, It is characterized in that The upper ends of the seventh connecting plate and the eighth connecting plate are arranged on the lower end of the web of the column head section, and the lower ends of the seventh connecting plate and the eighth connecting plate are arranged on the supporting plate.

4. The connection structure between a steel bracket and a steel column according to claim 3, It is characterized in that The first connecting plate connects the flanges at both ends of the column head section to the flanges at both ends of the steel column by bolt connection.

5. The connection structure between a steel bracket and a steel column according to claim 4, It is characterized in that The two groups of the second connecting plates and the third connecting plates are arranged on the web of the steel column by welding.

6. The connection structure between a steel bracket and a steel column according to claim 5, It is characterized in that The two groups of second connecting plates are connected to the third connecting plate and the web of the column head section by bolt connection.

7. The connection structure between a steel bracket and a steel column according to claim 6, It is characterized in that The fourth connecting plate is arranged on the web of the steel column by welding.

8. The connection structure between a steel bracket and a steel column according to claim 7, It is characterized in that The fifth connecting plate is vertically arranged on the fourth connecting plate by welding, and the lower chord of the steel bracket is connected to the fifth connecting plate by welding or bolting.

9. The connection structure between a steel bracket and a steel column according to claim 8, It is characterized in that The two groups of the sixth connecting plates and the seventh connecting plates are arranged on the web of the steel column by welding.

10. The connection structure between a steel bracket and a steel column according to claim 9, It is characterized in that The two groups of the sixth connecting plates are connected to the eighth connecting plate and the seventh connecting plate by bolt connection.

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