Connection node and construction method of steel truss with Y-shaped cross section and reinforced concrete structure

Abstract

The invention discloses a connection node and construction method of a steel truss with a Y-shaped cross section and a reinforced concrete structure, and relates to the technical field of construction engineering and composite structures. The connection node of a steel truss with a Y-shaped cross section and a reinforced concrete structure comprises an H-shaped steel component, an outrigger truss rod, and a load transfer component welded between the H-shaped steel component and the outrigger truss rod; the H-shaped steel component and the load transfer component are pre-buried in a reinforced concrete shear wall; the load transfer component comprises a vertically arranged panel, a pair of connecting plates welded vertically at intervals in the middle of the inner surface of the panel, anchor bars welded vertically at both sides of the inner surface of the panel, and a stiffening plate welded on the H-shaped steel component; the anchor bars are arranged at intervals along the height direction of the panel; and the outer surface of the panel is flush with the outer surface of the reinforced concrete shear wall. The invention solves the problem that the traditional connection method will cut off the reinforced concrete shear wall, forming a closed cavity in the shear wall, making it difficult to pour concrete in the cavity, and it is difficult to ensure the continuous density of concrete in the node area.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering and composite structures, in particular to a connection node between a steel truss with a sub-shaped cross section and a reinforced concrete structure and a construction method. Background Art

[0002] With the continuous development of large-span stadium structures, many new structural systems have emerged. For example, in large-span stadium complexes, the use of spatial multi-layer trusses and reinforced concrete shear walls is increasing. Multi-layer truss members require higher bidirectional bending bearing capacity, and the members are mostly box-type sections. This requires solving the lateral connection problem between the box-type truss members and the reinforced concrete shear walls. The traditional connection method is to add a section of steel column to the reinforced concrete shear wall, and then directly weld the box-type bracket to the steel column to connect it to the structural member. However, this type of node connection will cut off the reinforced concrete shear wall and form a closed cavity in the shear wall. It is difficult to pour concrete in the cavity, and it is difficult to ensure the continuous density of the concrete in the node area. Summary of the invention

[0003] The purpose of the present invention is to provide a connection node and construction method for a steel truss of a U-shaped cross-section and a reinforced concrete structure, so as to solve the problem that the traditional connection method will cut off the reinforced concrete shear wall, form a closed cavity in the shear wall, make it difficult to pour concrete in the cavity, and it is difficult to ensure the continuous density of the concrete in the node area.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] The connection node between the steel truss with a sub-shaped cross section and the reinforced concrete structure includes an H-shaped steel component, an outrigger truss member, and a load transfer component welded between the H-shaped steel component and the outrigger truss member; the H-shaped steel component and the load transfer component are pre-buried in the reinforced concrete shear wall;

[0006] The load transfer component includes a vertically arranged panel, a pair of connecting plates welded at vertical intervals in the middle of the inner surface of the panel, anchor bars welded at vertical intervals on both sides of the inner surface of the panel, and a stiffening plate welded on the H-shaped steel component; the anchor bars are arranged at intervals along the height direction of the panel; the outer surface of the panel is flush with the outer surface of the reinforced concrete shear wall.

[0007] Further, the H-shaped steel component includes an H-shaped steel and studs welded thereon;

[0008] The studs are arranged in groups at intervals along the height direction of the H-shaped steel, and two studs are arranged at intervals in each group.

[0009] Furthermore, the stiffening plates are arranged at intervals along the height direction of the H-shaped steel web, and the stiffening plates are arranged horizontally and welded between the inner and outer flanges of the H-shaped steel and the H-shaped steel web; the outer edges of the stiffening plates are flush with the outer edges of the inner and outer flange plates of the H-shaped steel.

[0010] Furthermore, the outer end of the anchor bar is welded to the inner side surface of the panel.

[0011] Furthermore, a pair of connecting plates of the load transfer component are welded to the H-beam outer flange plates of the H-beam component.

[0012] Furthermore, the outrigger truss member includes a chord with a U-shaped cross-section and a diagonal web with a U-shaped cross-section; the chord is a horizontal rod; the diagonal web is arranged above the chord, and includes an inner horizontal rod and an outer upper inclined rod; the angle between the horizontal rod and the outer upper inclined rod is 45°.

[0013] Furthermore, the chord extension truss member is connected to the outer end surface of the chord through an on-site weld lining plate; the diagonal web member is connected to the diagonal web extension truss member through an on-site weld lining plate on the outer end surface of the diagonal web member.

[0014] Furthermore, the chord includes upper and lower flange plates of the chord and left and right web plates of the chord vertically welded between the upper and lower flange plates of the chord; the diagonal web member includes upper and lower flange plates of the diagonal web member and left and right web plates of the diagonal web member vertically welded between the upper and lower flange plates of the diagonal web member.

[0015] The construction method for connecting a steel truss with a reinforced concrete structure using the above-mentioned U-shaped cross-section is as follows:

[0016] Step 1: Process the H-shaped steel components, outrigger truss members and load transfer components in the factory, weld them together, and then transport them to the site for installation. Ensure that after installation, the outer surface of the panel of the load transfer component is flush with the outer surface of the reinforced concrete shear wall to be cast.

[0017] Step 2: Position and tie the steel bars of the reinforced concrete shear wall, and pour the reinforced concrete shear wall and the core area concrete of the node.

[0018] Step three: after the concrete in the core area of ​​the node reaches sufficient strength, hoist the extended truss members, and temporarily fix the on-site weld lining plates to the left and right webs of a pair of chord members and the left and right webs of a pair of diagonal webs of the extended truss members with mounting bolts, and then weld the extended truss members to the extended truss members.

[0019] Step 4: Finally, cut off the on-site weld lining, and apply paint to the welding position of the extended truss members and the extended truss members as needed to complete the construction.

[0020] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0021] 1. The present invention adds a load transfer component between the H-shaped steel component and the outrigger truss member, and welds the H-shaped steel component, the outrigger truss member and the load transfer component into one body. The load transfer component and the H-shaped steel component are embedded in the reinforced concrete shear wall together, without cutting off the internal longitudinal steel bars of the reinforced concrete shear wall structure, ensuring the continuity of the steel bars, facilitating the steel bar construction, solving the problem of inconvenient overlap of the stirrups, and not cutting off the concrete, not extending the corbel, and avoiding the appearance of a closed cavity in the node area, ensuring dense grouting, reducing the construction difficulty, and improving the construction quality.

[0022] 2. The load transfer components are provided with panels to increase the panel structure, facilitate mold closing, simplify construction, and ensure that the stirrups of the reinforced concrete shear wall structure are closed and continuous. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a stereoscopic diagram of the connection node between the steel truss of the U-shaped cross section and the reinforced concrete structure of the present invention.

[0024] Figure 2 It is a three-dimensional diagram of the H-beam components and the outrigger truss members connected by load transfer components.

[0025] Figure 3 It is an elevation view of the H-beam member and the outrigger truss member connected by the load transfer component.

[0026] Figure 4 It is the plane where the H-beam members and the outrigger truss members are connected by load transfer components. Figure 1 .

[0027] Figure 5 It is the plane where the H-beam members and the outrigger truss members are connected by load transfer components. Figure 2 .

[0028] Figure 6 yes Figure 5 Section 1-1.

[0029] Figure 7 yes Figure 5 Section 2-2.

[0030] Figure 8 yes Figure 5 Section 3-3.

[0031] Figure numbers: Figure numbers: 1 - H-shaped steel component, 2 - extended truss member, 3 - load transfer component, 4 - bolt, 5 - chord extension truss member, 6 - chord, 7 - diagonal web member, 8 - panel, 9 - anchor bar, 10 - connecting plate, 11 - stiffening plate, 12 - field welded lining plate, 13 - reinforced concrete shear wall, 14 - diagonal web member extension truss member, 15 - H-shaped steel. DETAILED DESCRIPTION

[0032] See also Figures 1 to 8 As shown, the connection node and construction method of the Y-shaped cross-section steel truss and the reinforced concrete structure, the connection node of the Y-shaped cross-section steel truss and the reinforced concrete structure includes an H-shaped steel component 1, an outrigger truss rod 2, and a load transfer component 3 welded between the H-shaped steel component 1 and the outrigger truss rod 2; the H-shaped steel component 1 and the load transfer component 3 are embedded in the reinforced concrete shear wall 13; when the reinforced concrete shear wall is connected to the steel truss on multiple sides, the number of load transfer components and outrigger truss rods is increased accordingly, and collision anchor bars are set as connecting plates when necessary.

[0033] See also Figures 1 to 4 As shown, the H-shaped steel component 1 includes an H-shaped steel 15 and studs 4 welded thereon; the studs are arranged in groups along the height direction of the H-shaped steel, and two studs are arranged in each group; the studs welded to the outer surfaces of the inner and outer flange plates of the H-shaped steel are located between a pair of connecting plates 10 of the load transfer component 3; the H-shaped steel component 1 is arranged to pass through the reinforced concrete shear wall 13 in the height direction.

[0034] See also Figures 1 to 4 As shown, the outrigger truss member 2 includes a chord member 6 with a U-shaped cross section and a diagonal web member 7 with a U-shaped cross section, wherein the chord member 6 is a horizontal member; the diagonal web member is arranged above the chord member 6 and includes an inner horizontal member and an outer upper inclined member; see Figure 5 As shown, the angle between the horizontal rod and the outer upper inclined rod is 45°; the chord 6 includes the upper and lower flange plates of the chord and the left and right web plates of the chord vertically welded between the upper and lower flange plates of the chord; the diagonal web member 7 includes the upper and lower flange plates of the diagonal web member and the left and right web plates of the diagonal web member vertically welded between the upper and lower flange plates of the diagonal web member; the outer end surface of the chord 6 is connected to the chord extension truss member 5 through the on-site weld lining plate 12; the outer end surface of the diagonal web member 7 ... The lining plate 12 is connected to the diagonal web extension truss member 14; the field welded lining plate 12 is temporarily connected to a pair of left and right webs of chord members and a pair of left and right webs of diagonal web members by bolts; the field welded lining plate 12 is in the shape of a U-shaped letter "Y", including a top plate, a bottom plate, and a pair of vertical plates connected between the middle parts of the top plate and the bottom plate, wherein the pair of vertical plates are affixed to the inner side surfaces of the left and right webs of a pair of chord members, the top plate is affixed to the lower surface of the upper flange plate of the chord member, and the bottom plate is affixed to the upper surface of the lower flange plate of the chord member.

[0035] See also Figures 1 to 4As shown, the load transfer component 3 includes a vertically arranged panel 8, a pair of connecting plates 10 vertically welded at intervals in the middle of the inner surface of the panel 8, anchor bars 9 vertically welded at both sides of the inner surface of the panel 8, and a stiffening plate 11 welded on the H-shaped steel component 1; the anchor bars 9 are arranged at intervals along the height direction of the panel 8; the outer surface of the panel 8 is flush with the outer surface of the reinforced concrete shear wall 13; the height of the panel 8 is less than the height of the H-shaped steel component 1, it is located in the middle of the H-shaped steel component 1, and the width is greater than the width of the outrigger truss rod 2 degree; the outer end of the anchor bar 9 is welded to the inner side of the panel 8, and the length is determined according to calculation; the anchor bar 9 is located on both sides of the upper and lower flange plates of the H-beam of the H-beam component 1; a pair of connecting plates 10 of the load transfer component 3 are welded to the H-beam outer flange plate of the H-beam component 1; the stiffening plate 11 is arranged at intervals along the height direction of the H-beam web, and the stiffening plate 11 is horizontally arranged and welded between the inner and outer flanges of the H-beam and the H-beam web; the outer edge of the stiffening plate 11 is flush with the outer edge of the inner and outer flange plates of the H-beam.

[0036] The construction method for connecting a steel truss with a reinforced concrete structure using the above-mentioned U-shaped cross-section is as follows:

[0037] Step 1: Process the H-shaped steel component 1, the outrigger truss member 2 and the load transfer component 3 in the factory, weld them together, and then transport them to the site for installation. After the installation is completed, ensure that the outer surface of the panel of the load transfer component 3 is flush with the outer surface of the reinforced concrete shear wall 13 to be cast;

[0038] Step 2: Position and tie the steel bars of the reinforced concrete shear wall 13, and pour the reinforced concrete shear wall and the core area concrete of the node;

[0039] Step 3: After the concrete in the core area of ​​the node reaches the required strength, the extended truss member is hoisted, and the on-site weld liner 12 is temporarily fixed to the left and right webs of a pair of chord members and the left and right webs of a pair of diagonal web members of the extended truss member 2 with mounting bolts, and then the extended truss member is welded to the extended truss member 2;

[0040] Step 4, finally cut off the on-site weld lining plate 12, so as to hide the on-site weld lining plate 12 at the corbel, and apply paint to the welding position of the extended truss member and the extended truss member 2 as needed to complete the construction.

Claims

1. The connection node between the steel truss with a sub-shaped cross section and the reinforced concrete structure is characterized by: It comprises an H-shaped steel component (1), an outrigger truss member (2), and a load transfer component (3) welded between the H-shaped steel component (1) and the outrigger truss member (2); the H-shaped steel component (1) and the load transfer component (3) are pre-buried in a reinforced concrete shear wall (13); The load transfer component (3) comprises a vertically arranged panel (8), a pair of connecting plates (10) vertically welded at intervals to the middle of the inner surface of the panel (8), anchor bars (9) vertically welded to both sides of the inner surface of the panel (8), and a stiffening plate (11) welded to the H-shaped steel component (1); the anchor bars (9) are arranged at intervals along the height direction of the panel (8); The outer surface of the panel (8) is flush with the outer surface of the reinforced concrete shear wall (13); The H-shaped steel component (1) comprises an H-shaped steel (15) and studs (4) welded all over the H-shaped steel. The studs are arranged in groups at intervals along the height direction of the H-shaped steel, with two studs arranged at intervals in each group; The stiffening plates (11) are arranged at intervals along the height direction of the H-shaped steel web, and the stiffening plates (11) are arranged horizontally and welded between the inner and outer flanges of the H-shaped steel and the H-shaped steel web; The outer edge of the stiffening plate (11) is flush with the outer edges of the inner and outer flange plates of the H-shaped steel; A pair of connecting plates (10) of the load transfer component (3) are welded to the H-shaped steel outer flange plate of the H-shaped steel component (1); The outrigger truss member (2) comprises a chord member (6) with a U-shaped cross section and a diagonal web member (7) with a U-shaped cross section; The chord rod (6) is a horizontal rod; The diagonal web member is arranged above the chord member (6), and comprises an inner horizontal member and an outer upper inclined member; The angle between the horizontal bar and the outer upper inclined bar is 45°; The chord rod (6) is connected to the chord rod extension truss member (5) via an on-site weld lining plate (12) on the outer end surface; The outer end surface of the diagonal web member (7) is connected to a diagonal web member lengthening truss member (14) via an on-site weld lining plate (12).

2. The connection node between the steel truss with a U-shaped cross section and a reinforced concrete structure according to claim 1, characterized in that: The outer end of the anchor bar (9) is welded to the inner side surface of the panel (8).

3. The connection node between the steel truss with a U-shaped cross section and a reinforced concrete structure according to claim 1, characterized in that: The chord (6) comprises upper and lower chord flange plates and left and right chord web plates vertically welded between the upper and lower chord flange plates; The diagonal web member (7) comprises diagonal web member upper and lower flange plates and diagonal web member left and right web plates vertically welded between the diagonal web member upper and lower flange plates.

4. A construction method for connecting a steel truss with a U-shaped cross section to a reinforced concrete structure using the method of claim 1, characterized in that: The steps are: Step 1: Process the H-shaped steel component (1), the outrigger truss member (2) and the load transfer component (3) in a factory, weld them together, and then transport them to the site for installation. After installation, ensure that the outer surface of the panel of the load transfer component (3) is flush with the outer surface of the reinforced concrete shear wall (13) to be cast. Step 2: Position and tie the steel bars of the reinforced concrete shear wall (13), and pour the reinforced concrete shear wall and the core area concrete of the node; Step 3: After the concrete in the core area of ​​the node reaches a certain strength, the extended truss member is hoisted, and the on-site weld lining plate (12) is temporarily fixed to the left and right web plates of a pair of chord members and the left and right web plates of a pair of diagonal web members of the extended truss member (2) with mounting bolts, and then the extended truss member is welded to the extended truss member (2); Step 4: Finally, cut off the on-site weld lining plate (12), and apply paint to the welding position of the extended truss member and the extended truss member (2) as needed to complete the construction.

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