Steel truss node connecting structure for bridge

Abstract

The utility model relates to the technical field of bridge engineering, in particular to a steel truss node connecting structure for a bridge, which is characterized in that two connecting boxes are fixedly buckled on an upper chord member after being butted up and down, a connecting piece is mounted below the connecting box at the lower part, the connecting piece, the connecting boxes and the upper chord member are fixedly connected through bolts, a joint I is arranged on each connecting box, and a joint II is arranged on each connecting box. The first connector is fixedly connected with the transverse support, second connectors are symmetrically arranged on the two sides of the first connector respectively, and the two second connectors are fixedly connected with the two inclined supports respectively. The connecting pieces are located below the upper chord member, the two connecting pieces are symmetrically arranged along the center line of the connecting box, steel plates and third connectors are arranged on the connecting pieces, the steel plates are fixedly connected with the straight web members, and the third connectors are fixedly connected with the diagonal web members; welding stress at the upper chord connecting joints can be prevented from being excessively concentrated, smooth installation of the steel truss is guaranteed, and the construction period and the construction safety quality are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a steel truss node connection structure for bridges. Background Art

[0002] With the improvement of social construction level and the improvement of truss structure form, truss beam bridges have a series of advantages such as short construction period, small environmental impact, and low foundation requirements, which make them have significant competitive advantages. Truss beam bridges have broad application prospects in both small and medium-sized bridges and large-span bridges. In a certain bridge project, from the perspectives of saving investment, shortening construction period, and resource utilization, the main bridge reconstruction and replacement plan is adopted, using a bottom-supported simply supported steel truss with a lower structural height to meet the needs of the project.

[0003] In the prior art, some bridge steel trusses are hoisted and constructed by means of segmented butt-jointed assembly. The upper chord is a double-node structure. The upper chord is laterally connected to a transverse brace or a diagonal brace, and the lower part of the upper chord is connected to a straight web member or a diagonal web member. If it is directly welded to the upper chord, it is necessary to cut the diagonal web member, the diagonal brace and other rods to ensure that the angle between the rod and the upper line rod is an acute angle. In addition, due to the intersection of multiple rods, the upper chord has more connection nodes and dense welds, which is not convenient for on-site construction and has high requirements on the quality of welding. Multiple welds on the upper chord may affect the safety performance at the node. Utility Model Content

[0004] In view of the above problems, the utility model provides a steel truss node connection structure for bridges, which can reduce the intersection of welds, facilitate welding construction, improve welding quality, ensure the smooth installation of steel trusses, and ensure the construction period and construction safety and quality.

[0005] The technical solution adopted by the utility model to solve its technical problems:

[0006] A steel truss node connection structure for a bridge comprises a connection box and a connection piece, wherein two connection boxes are butted up and down and then fastened and fixed on an upper chord, and the connection piece is fixedly installed below the lower connection box, and a joint 1 is arranged on the connection box, and the joint 1 is fixedly connected to a cross brace, and joints 2 are symmetrically arranged on both sides of the joint 1, and the two joints 2 are respectively fixedly connected to two diagonal braces; the connection piece is located below the upper chord, and two connection pieces are arranged, and the two connection pieces are symmetrically arranged along the center line of the connection box, and a steel plate and a joint 3 are arranged on the connection piece, and the steel plate is fixedly connected to a straight web member, and the joint 3 is fixedly connected to a diagonal web member.

[0007] In an optional embodiment, the two ends of the connection box are connected, and the connection box includes two fixed side surfaces and a connecting transverse surface, the fixed side surfaces are arranged perpendicular to the connecting transverse surface, and one of the fixed side surfaces is vertically welded with a joint 1.

[0008] In an optional embodiment, two clamping plates 1 are arranged in the vertical direction in the joint 1, a first gap is arranged between the two clamping plates 1, and the first gap is fixedly connected to the cross bracing web.

[0009] In an optional embodiment, two second clamping plates are arranged in the vertical direction in the second joint, a second gap is arranged between the two second clamping plates, and the second gap is fixedly connected to the diagonal bracing web.

[0010] In an optional embodiment, the angle between the extension direction of the joint 2 and the extension direction of the joint 1 is an acute angle.

[0011] In an optional embodiment, a steel plate is welded to an end of one end of the connecting piece, a gap is formed between the steel plates of the two connecting pieces, and the gap is fixedly connected to the web of the straight web member.

[0012] In an optional embodiment, an angle steel is provided in the middle of the connecting piece, and a joint three is welded on the upper end of the angle steel. Installation grooves are formed between the outer walls on both sides of the joint three and the inner walls on both sides of the connecting piece, and the top and bottom plates of the diagonal web rods are respectively extended into the two installation grooves and fixedly connected to the connecting piece.

[0013] In an optional embodiment, a support plate is provided between the joints 3, and the webs on both sides of the diagonal web rod are respectively located on both sides of the support plate.

[0014] In an optional embodiment, the two sides of the opening of the joint 1 are respectively vertically connected with a fixing plate 1, and the fixing plate 1 is penetrated with a through hole 1, and the two sides of the opening of the joint 2 are respectively vertically connected with a fixing plate 2, and the fixing plate 2 is penetrated with a through hole 2.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The node connection structure of a steel truss for a bridge provided in the utility model is provided with two connection boxes so that they are butt-jointed and fastened on the upper chord, thereby reducing the welding construction of the upper chord and ensuring the bearing capacity and compressive resistance of the upper chord; the connection box is provided with matching joints 1 and 2 according to the structure of the transverse brace and the diagonal brace, a connection piece is provided below the connection box, a joint 3 matched with the diagonal web member is provided on the connection piece, and a steel plate connected to the straight web member, so as to avoid cutting of the rod member, facilitate installation of the rod member at the node, improve assembly efficiency, avoid excessive concentration of welding stress at the connection node of the upper chord, ensure smooth installation of the steel truss, and ensure the construction period and safety and quality of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the connection structure of the steel truss node for bridges and the connection structure of the straight web member, the diagonal web member, the upper chord member, the cross brace and the diagonal brace according to the embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the side view of the connection between the steel truss node connection structure for bridges and the straight web members, the diagonal web members, the upper chord members, the cross braces and the diagonal braces according to the embodiment of the utility model;

[0020] Figure 3 for Figure 2 A magnified schematic diagram of the middle A area;

[0021] Figure 4 This is a schematic diagram of the exploded structure of two connection boxes connected in an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the exploded structure of two connecting pieces connected in an embodiment of the utility model;

[0023] Figure 6 This is a cross-sectional view of the connection of two connecting pieces in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Steel truss; 11. Upper chord; 12. Diagonal web member; 13. Straight web member; 14. Horizontal brace; 15. Diagonal brace; 2. Connection box; 21. Joint 1; 211. Fixed plate 1; 212. Perforation 1; 213. Clamp 1; 214. First gap; 22. Joint 2; 221. Fixed plate 2; 222. Perforation 2; 223. Clamp 2; 224. Second gap; 3. Connector; 31. Steel plate; 311. Slit; 32. Angle steel; 33. Joint 3; 331. Support plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the following description of the utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The term "connection" only indicates the connection between devices and has no special meaning.

[0028] The steel truss node connection structure for bridges described in the utility model is applied to a bottom-supported simply supported steel truss bridge, which includes two spans. Two steel trusses 1 are arranged on the single span bridge, and a composite horizontal support method is adopted between the two steel trusses 1. Horizontal cross braces 14 are arranged on the nodes of the upper chord rods 11, and diagonal braces 15 are connected between the connection nodes of adjacent upper chord rods 11 on the two steel trusses 1; the lower part of the upper chord rod 11 is respectively connected to a straight web member 13 and a diagonal web member 12.

[0029] The upper chord 11 and the diagonal web member 12 adopt a box-shaped section, and stiffening ribs are arranged on the upper chord 11 and the diagonal web member 12. The straight web member 13, the cross brace 14 and the diagonal brace 15 adopt an H-shaped section.

[0030] For specific embodiments, see Figure 1-Figure 6 A steel truss node connection structure for a bridge comprises a connection box 2 and a connection piece 3. The two connection boxes 2 are butted up and down and then buckled on the upper chord 11. The connection piece 3 is installed below the lower connection box 2. The connection piece 3, the connection box 2 and the upper chord 11 are fixedly connected by bolts. A joint 21 is provided on the connection box 2. The joint 21 is fixedly connected to the cross brace 14. Joints 22 are symmetrically provided on both sides of the joint 21. The two joints 22 are fixedly connected to the two diagonal braces 15 respectively; the connection piece 3 is located below the upper chord 11. Two connection pieces 3 are provided. The two connection pieces 3 are symmetrically arranged along the center line of the connection box 2. A steel plate 31 and a joint 3 33 are provided on the connection piece 3. The steel plate 31 is fixedly connected to the straight web member 13, and the joint 3 33 is fixedly connected to the diagonal web member 12.

[0031] The connection box 2 adopts a semi-enclosed square frame structure, and both ends of the connection box 2 are through-connected. The connection box 2 includes two fixed side surfaces and a connecting cross surface, and the fixed side surfaces are arranged perpendicular to the connecting cross surface; the joint 21 is located on one of the fixed side surfaces, and the joint 21 is arranged perpendicularly to the fixed side surface. The joint 21 and the fixed side surface of the connection box 2 are connected by welding. The cross-section of the joint 21 is U-shaped, and the side surface of the opening on the joint 21 is aligned with the edge of the fixed side surface away from the connecting cross surface. Fixed plates 211 are vertically connected to both sides of the opening of the joint 21, and a through hole 212 is arranged on the fixed plate 211 from top to bottom, which is connected to the fixed plate 211 of another connection box 2 by bolts.

[0032] Two clamping plates 1 213 are arranged in the joint 1 21 along the vertical direction, and a first gap 214 is arranged between the two clamping plates 1 213 . The first gap 214 is used to connect the web of the cross brace 14 .

[0033] One end of the joint 22 is welded to the fixed side of the connection box 2, and the joint 22 adopts a U-shaped cross-section. The angle between the extension direction of the joint 22 and the extension direction of the joint 1 21 is an acute angle. The two sides of the opening of the joint 22 are vertically connected with fixed plates 221 respectively, and the fixed plate 221 is provided with a through hole 222, which is connected to the fixed plate 221 on another connection box 2 by bolts; two clamping plates 223 are provided in the joint 22, and a second gap 224 is provided between the two clamping plates 223. The second gap 224 is used to connect the web of the diagonal brace 15, so as to facilitate the subsequent welding construction of the interface between the diagonal brace 15 and the joint 22.

[0034] The connecting member 3 is fixedly connected to the connecting cross surface of the connecting box 2 located at the lower part of the upper chord rod 11, and the connection method can be welding connection. A steel plate 31 is welded on the end head of one end of the connecting member 3, and slots are formed between the two ends of the steel plate 31 and the inner surfaces on both sides of the connecting member 3. The two slots are respectively connected to the top and bottom plates of the straight web rod 13. The connection method can be welding connection. A gap 311 is formed between the steel plates 31 of the two connecting members 3 for connecting the webs of the straight web rod 13. An angle steel 32 is welded in the middle part of the connecting member 3, and a joint three 33 is welded on the upper end face of the angle steel 32, so that the angle between the axis of the straight web rod 13 and the axis of the diagonal web rod 12 is an acute angle. Installation grooves are formed between the outer side walls on both sides of the joint three 33 and the inner walls on both sides of the connecting member 3. The top and bottom plates of the diagonal web rod 12 are respectively extended into the two installation grooves and connected to the connecting member 3. The connection method can be welding connection. A support plate 331 is arranged between the joint three 33, and the two webs of the diagonal web rod 12 are respectively located on both sides of the support plate 331.

[0035] The use process and working principle of this device:

[0036] After the two connection boxes 2 are butted together, they are buckled onto the upper chord rod 11. The fixing plate 1 211 on the joint 1 21 and the fixing plate 2 221 on the joint 2 22 are connected by bolts, and the interfaces on the connection box 2 and the upper chord rod 11 are welded and fixed one by one; the web of the cross brace 14 extends into the first gap 214 between the two clamping plates 1 213, and the interface between the cross brace 14 and the joint 1 21 is welded and fixed, and the web of the diagonal brace 15 extends into the second gap 224 between the two clamping plates 223, and the interface between the diagonal brace 15 and the joint 22 is welded and fixed;

[0037] The two connecting pieces 3 are butt-jointed and welded to the connecting box 2; the top and bottom plates of the straight web member 13 are respectively extended into the slots formed between the two ends of the steel plate 31 and the connecting piece 3 in the vertical direction; the two steel plates 31 are respectively located on both sides of the web of the straight web member 13; the interface between the straight web member 13 and the two connecting pieces 3 is welded and fixed; the top and bottom plates of the diagonal web member 12 are extended into the installation groove between the joint three 33 and the connecting piece 3; the interface between the diagonal web member 12 and the connecting piece 3 is welded and fixed.

[0038] The node connection structure of a steel truss for a bridge provided in the utility model is provided with two connection boxes so that they are butt-jointed and fastened on the upper chord, thereby reducing the welding construction of the upper chord and ensuring the bearing capacity and compressive resistance of the upper chord; the connection box is provided with matching joints 1 and 2 according to the structure of the transverse brace and the diagonal brace, a connection piece is provided below the connection box, a joint 3 matched with the diagonal web member is provided on the connection piece, and a steel plate connected to the straight web member, so as to avoid cutting of the rod member, facilitate installation of the rod member at the node, improve assembly efficiency, avoid excessive concentration of welding stress at the connection node of the upper chord, ensure smooth installation of the steel truss, and ensure the construction period and safety and quality of construction.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel truss node connection structure for a bridge, characterized in that: The invention comprises a connection box (2) and a connection piece (3). The two connection boxes (2) are fastened and fixed on the upper chord rod (11) after being butted up and down. The connection piece (3) is fixedly installed below the lower connection box (2). A joint 1 (21) is arranged on the connection box (2). The joint 1 (21) is fixedly connected to the cross brace (14). Joint 2 (22) is symmetrically arranged on both sides of the joint 1 (21). The two joints 2 (22) are respectively fixedly connected to the two diagonal braces (15). The connection piece (3) is located below the upper chord rod (11). Two connection pieces (3) are arranged. The two connection pieces (3) are symmetrically arranged along the center line of the connection box (2). A steel plate (31) and a joint 3 (33) are arranged on the connection piece (3). The steel plate (31) is fixedly connected to the straight web rod (13). The joint 3 (33) is fixedly connected to the diagonal web rod (12).

2. A steel truss node connection structure for a bridge according to claim 1, characterized in that: The connection box (2) has two through ends, and comprises two fixed side surfaces and a connecting transverse surface, wherein the fixed side surfaces are arranged perpendicular to the connecting transverse surface, and a joint 1 (21) is vertically welded to one of the fixed side surfaces.

3. A steel truss node connection structure for a bridge according to claim 2, characterized in that: Two clamping plates (213) are arranged in the vertical direction in the joint (21), a first gap (214) is arranged between the two clamping plates (213), and the first gap (214) is fixedly connected to the web of the cross brace (14).

4. A steel truss node connection structure for a bridge according to claim 3, characterized in that: Two second clamping plates (223) are arranged in the vertical direction in the second joint (22), a second gap (224) is arranged between the two second clamping plates (223), and the second gap (224) is fixedly connected to the web of the diagonal brace (15).

5. A steel truss node connection structure for a bridge according to claim 4, characterized in that: The angle formed by the extension direction of the second joint (22) and the extension direction of the first joint (21) is an acute angle.

6. A steel truss node connection structure for a bridge according to claim 1, characterized in that: A steel plate (31) is welded to one end of the connecting piece (3), a gap (311) is formed between the steel plates (31) of the two connecting pieces (3), and the gap (311) is fixedly connected to the web of the straight web bar (13).

7. A steel truss node connection structure for a bridge according to claim 6, characterized in that: An angle steel (32) is provided in the middle of the connecting member (3), a joint three (33) is welded to the upper end of the angle steel (32), mounting grooves are formed between the outer walls on both sides of the joint three (33) and the inner walls on both sides of the connecting member (3), and the top and bottom plates of the diagonal web rod (12) extend into the two mounting grooves respectively and are fixedly connected to the connecting member (3).

8. A steel truss node connection structure for a bridge according to claim 7, characterized in that: A support plate (331) is provided between the joints (33), and the webs on both sides of the diagonal web bar (12) are respectively located on both sides of the support plate (331).

9. The steel truss node connection structure for bridges according to claim 1, characterized in that: The two sides of the opening of the joint 1 (21) are respectively vertically connected to the fixing plate 1 (211), and the fixing plate 1 (211) is provided with a through hole 1 (212). The two sides of the opening of the joint 2 (22) are respectively vertically connected to the fixing plate 2 (221), and the fixing plate 2 (221) is provided with a through hole 2 (222).

Images