Connection nodes between composite columns and steel truss beams

Abstract

This utility model discloses a connection node between a composite column and a steel truss beam. The composite column has a transverse H-shaped steel beam end and an inclined box-shaped web member end welded to its steel pipe. The box-shaped web member end is directly below the H-shaped steel beam end and the two are welded together. A steel beam positioning plate and a steel beam connecting plate are provided at the end of the H-shaped steel beam end away from the composite column, and a web member positioning plate is provided at the end of the box-shaped web member end away from the composite column. A transverse beam top reinforcement plate is welded to the steel pipe near the top of the H-shaped steel beam end. Several transverse grooved reinforcement plates are welded circumferentially around the steel pipe. Vertical web member side reinforcement plates are welded to the left and right sides of the box-shaped web member end, a vertical web member bottom reinforcement plate is welded to the bottom of the box-shaped web member end, and a transverse web member front reinforcement plate is welded to the front of the box-shaped web member end. This node can form a truss load-bearing system to distribute the load, control installation deviations, and ensure the positional accuracy of the outer layer of reinforcement in the composite column.

Description

Technical Field

[0001] This utility model belongs to the field of steel-concrete structures, specifically relating to a connection node between a composite column and a steel truss beam. Background Technology

[0002] Before pouring the outer layer of concrete for composite columns, steel beams need to be installed on the steel pipes of the composite column, then the outer layer of reinforcing bars needs to be laid out and formwork erected before pouring. When there are many steel beams at the same node on the composite column, or when the steel beams are complex, not only is the installation difficult, but it is also difficult to position the outer layer of reinforcing bars. For example, when the composite column is connected to a steel truss beam, due to the complex structure of the steel truss beam, the installation deviation is often >5mm. The key issue is that it is impossible to accurately control the position of the outer layer of reinforcing bars in the node area, especially near the steel truss beam. Utility Model Content

[0003] The purpose of this utility model is to provide a connection node between a composite column and a steel truss beam. This node can form a truss force system to distribute the load, control installation deviation, and ensure the positional accuracy of the outer layer of steel reinforcement in the composite column.

[0004] The technical solution adopted in this utility model is:

[0005] A connection node between a composite column and a steel truss beam is disclosed. The composite column has a transverse H-shaped steel beam end and an inclined box-shaped web member end welded to its steel pipe. The box-shaped web member end is directly below the H-shaped steel beam end and the two are welded together. The end of the H-shaped steel beam end furthest from the composite column is equipped with a steel beam positioning plate for positioning when connecting adjacent H-shaped steel beam segments, and a steel beam connecting plate for connection. The end of the box-shaped web member end furthest from the composite column is equipped with a web member positioning plate for positioning when connecting adjacent box-shaped web member segments. A transverse beam top reinforcement plate is welded to the steel pipe near the top of the H-shaped steel beam end. The beam top reinforcement plate limits the height of the transverse longitudinal reinforcement near the beam top. Several transverse grooved reinforcement plates are welded around the circumference of the pipe. The grooved reinforcement plates have slots and are used to radially limit the vertical longitudinal reinforcement and height limit the stirrups. Vertical side reinforcement plates are welded to the left and right sides of the box-shaped web member ends, and vertical bottom reinforcement plates are welded to the bottom of the box-shaped web member ends. Both the side and bottom reinforcement plates are parallel to the arc surface of the steel pipe and are used to radially limit the vertical longitudinal reinforcement on the left and right sides and bottom of the box-shaped web member ends, respectively. A transverse front reinforcement plate is welded to the front side of the box-shaped web member ends. The front reinforcement plate is used to limit the height of the transverse longitudinal members on the front side of the box-shaped web member ends.

[0006] Preferably, the composite columns are arranged in segments, and each segment of the composite column has a steel pipe with a positioning plate welded on it for positioning when the composite column segments are joined.

[0007] Preferably, the outer surface of the steel pipe of the composite column is welded with studs.

[0008] Preferably, the steel beam positioning plate is located on the upper flange plate of the end of the H-shaped steel beam and is partially cantilevered, the steel beam connecting plate is located on both sides of the web of the end of the H-shaped steel beam and is partially cantilevered, and bolt holes are distributed on the steel beam connecting plate.

[0009] Preferably, studs are welded to the upper flange plate at the end of the H-beam.

[0010] Preferably, stiffening ribs are welded to both sides of the web plate at the end of the H-beam, and the stiffening ribs are arranged at intervals along the length of the end of the H-beam.

[0011] Preferably, the web member positioning plate is located on the top plate of the end of the box-shaped web member and is partially cantilevered.

[0012] Preferably, a stiffening plate is welded to the inner side of the end of the box-shaped web member.

[0013] Preferably, a support plate is welded between the lower part of the top reinforcement plate and the grooved reinforcement plate of the beam and the steel pipe of the composite column.

[0014] Preferably, the grooved reinforcing slabs are staggered in height.

[0015] The beneficial effects of this utility model are:

[0016] The ends of the H-beams and the ends of the box-type web members are spliced ​​with their respective remaining sections to form H-beams and box-type web members, respectively. The combination of H-beams and box-type web members forms a steel truss beam, in which the H-beams act as chords and the box-type web members act as diagonal supports between the columns, thus forming a truss force system that distributes the load. Specifically, the bending moment and shear force borne by the H-beams are transferred to the composite columns through the nodes, and the box-type web members are arranged diagonally to decompose the beam end load into the axial force (compression or tension) of the box-type web members. Instead of complex bending and shear forces, this force transfer method reduces stress concentration in the joint area, allowing the load to be transferred more smoothly from the steel truss beam to the composite column, avoiding premature failure of local structures due to complex stress. Furthermore, the box-shaped cross-section of the box-type web members has high moment of inertia and high torsional stiffness (closed section characteristics), thus improving the bending and shear stiffness of the joint area. The deformation under loads (vertical loads, wind loads, and seismic action) will be significantly reduced, improving the overall stability and safety of the structural system.

[0017] The ends of H-beams and box-type web members can be prefabricated in the factory and assembled on site. Due to the segmented splicing, the end sizes and weights are small, allowing for precise positioning at the corresponding design positions on the composite columns. At the same time, the steel beam positioning plate ensures the alignment accuracy between the H-beam ends and adjacent H-beam segments, and the web member positioning plate ensures the alignment accuracy between the box-type web member ends and adjacent box-type web member segments. This not only controls installation deviations (installation deviation ≤ 2mm) but also significantly shortens on-site positioning time.

[0018] The top reinforcement plate can limit the height of the transverse longitudinal reinforcement near the top of the beam; the grooved reinforcement plate can limit the radial height of the vertical longitudinal reinforcement and the height of the stirrups; the side reinforcement plate of the web member can limit the radial height of the vertical longitudinal reinforcement on both sides of the end of the box-shaped web member; the bottom reinforcement plate of the web member can limit the radial height of the vertical longitudinal reinforcement at the bottom of the end of the box-shaped web member; and the front reinforcement plate of the web member can limit the height of the transverse longitudinal member on the front side of the end of the box-shaped web member. The outer layer reinforcement at each key position can be effectively and reliably positioned, ensuring the positional accuracy of the outer layer reinforcement of the composite column. In addition, each reinforcement plate can also increase the bond strength of the cast-in-place concrete. Attached Figure Description

[0019] Figure 1 This is a perspective view of the connection node between the composite column and the steel truss beam in this utility model.

[0020] Figure 2 This is a perspective view of the end of the box-shaped web member in this utility model. For ease of observation, the side stiffening plates and bottom stiffening plates of the web member are not shown.

[0021] Figure 3 yes Figure 1 Cross-sectional view at point CC.

[0022] Figure 4 yes Figure 1 Cross-sectional view at point DD.

[0023] In the diagram: 1-Composite column; 2-Beam top reinforcement plate; 3-Groove reinforcement plate; 3a-Slot; 4-Steel pipe positioning plate; 5-H-beam end; 6-Stoke; 7-Steel beam positioning plate; 8-Stiffening rib; 9-Steel beam connecting plate; 10-Box-type web member end; 11-Web member side reinforcement plate; 12-Web member bottom reinforcement plate; 13-Web member front reinforcement plate; 14-Web member positioning plate; 15-Support plate; 16-Stiffening plate. Detailed Implementation

[0024] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0025] This embodiment discloses a connection node between a composite column and a steel truss beam, such as... Figures 1 to 4As shown, a transverse H-shaped steel beam end 5 and an inclined box-shaped web member end 10 are welded to the steel pipe of the composite column 1. The box-shaped web member end 10 is located directly below the H-shaped steel beam end 5 and the two are welded together. The end of the H-shaped steel beam end 5 away from the composite column 1 is provided with a steel beam positioning plate 7 for positioning when connecting adjacent H-shaped steel beam segments and a steel beam connecting plate 9 for connection. The end of the box-shaped web member end 10 away from the composite column 1 is provided with a web member positioning plate 14 for positioning when connecting adjacent box-shaped web member segments. A transverse beam top reinforcement plate 2 is welded to the steel pipe near the H-shaped steel beam end 5. The beam top reinforcement plate 2 is used to limit the height of the transverse longitudinal reinforcement near the beam top (the transverse longitudinal reinforcement is placed on the beam top reinforcement plate 2 to achieve height limitation). Several circumferentially distributed reinforcement bars are welded to the steel pipe. The dry sheet has a transverse grooved reinforcement plate 3, which has a slot 3a. The grooved reinforcement plate 3 is used to radially limit the vertical longitudinal reinforcement and to limit the height of the stirrups (the stirrups are placed on the grooved reinforcement plate 3 to achieve height limitation). The box-shaped web member end 10 has vertical web member side reinforcement plates 11 welded on the left and right sides. The box-shaped web member end 10 has a vertical web member bottom reinforcement plate 12 welded on the bottom. The web member side reinforcement plates 11 and the web member bottom reinforcement plates 12 are parallel to the arc surface of the steel pipe and are used to radially limit the vertical longitudinal reinforcement on the left and right sides and the bottom of the box-shaped web member end 10, respectively. The box-shaped web member end 10 has a transverse web member front reinforcement plate 13 welded on the front side. The web member front reinforcement plate 13 is used to limit the height of the transverse longitudinal members on the front side of the box-shaped web member end 10.

[0026] The H-beam end 5 and the box-type web member end 10 are spliced ​​with their respective remaining sections to form the H-beam and box-type web member, respectively. The H-beam and box-type web member combine to form a steel truss beam, where the H-beam acts as a chord and the box-type web member acts as an oblique support between the columns, thus forming a truss force system to distribute the load. Specifically, the bending moment and shear force borne by the H-beam are transferred to the composite column 1 through the nodes, and the box-type web member is arranged obliquely to decompose the beam end load into the axial force (compression or tension) of the box-type web member. Instead of complex bending and shear forces, this force transfer method reduces stress concentration in the joint area, allowing the load to be transferred more smoothly from the steel truss beam to the composite column 1, avoiding premature failure of local structures due to complex stress. Furthermore, the box section of the box web members itself has high moment of inertia and high torsional stiffness (closed section characteristics), thus improving the bending and shear stiffness of the joint area. The deformation under loads (vertical loads, wind loads, and seismic action) will be significantly reduced, improving the overall stability and safety of the structural system.

[0027] The H-beam end 5 and the box-type web member end 10 can be prefabricated in the factory and spliced ​​on site. Due to the segmented splicing, the end size and weight are small, so they can be accurately positioned on the corresponding design position on the composite column 1. At the same time, the steel beam positioning plate 7 can ensure the docking accuracy between the H-beam end 5 and the adjacent H-beam segment, and the web member positioning plate 14 can ensure the docking accuracy between the box-type web member end 10 and the adjacent box-type web member segment. This not only controls the installation deviation (installation deviation ≤ 2mm) but also significantly shortens the on-site positioning time.

[0028] The top reinforcement plate 2 can limit the height of the transverse longitudinal reinforcement near the top of the beam, the grooved reinforcement plate 3 can limit the radial direction of the vertical longitudinal reinforcement and the height of the stirrups, the side reinforcement plate 11 of the web member can limit the radial direction of the vertical longitudinal reinforcement on the left and right sides of the end 10 of the box-shaped web member, the bottom reinforcement plate 12 of the web member can limit the radial direction of the vertical longitudinal reinforcement at the bottom of the end 10 of the box-shaped web member, and the front reinforcement plate 13 of the web member can limit the height of the transverse longitudinal member on the front side of the end 10 of the box-shaped web member. The outer reinforcement at each key position can be effectively and reliably positioned, ensuring the position accuracy of the outer reinforcement of the composite column 1. In addition, each reinforcement plate can also increase the bond strength of the cast-in-place concrete.

[0029] like Figure 1 As shown, in this embodiment, preferably: the composite column 1 is segmented, and each segment of the composite column 1 has a steel pipe positioning plate 4 welded on its steel pipe for positioning when the composite column segments are joined. The steel pipe positioning plate 4 can ensure the joining accuracy between the composite column segments. After splicing, the steel pipe positioning plate 4 can be cut off. Studs 6 are distributed and welded on the outer surface of the steel pipe of the composite column 1. The studs 6 can enhance the bonding strength between the steel pipe and the cast-in-place concrete. Support plates 15 are welded between the lower part of the beam top reinforcement plate 2 and the grooved reinforcement plate 3 and the steel pipe of the composite column 1. The support plates 15 can improve the stability of the beam top reinforcement plate 2 and the grooved reinforcement plate 3. The grooved reinforcement plates 3 are staggered in height, which is convenient for installation and avoids stress concentration.

[0030] like Figure 1 and Figure 4 As shown, in this embodiment, preferably: the steel beam positioning plate 7 is provided on the upper flange plate of the H-beam end 5 and is partially cantilevered; the steel beam connecting plate 9 is provided on both sides of the web of the H-beam end 5 and is partially cantilevered; bolt holes are distributed on the steel beam connecting plate 9; when the H-beam end 5 is connected to an adjacent H-beam segment, it is positioned by the steel beam positioning plate 7, and then connected by the steel beam connecting plate 9 in conjunction with high-strength bolts; studs 6 are welded to the upper flange plate of the H-beam end 5, which can enhance the bond strength between the H-beam end 5 and the cast-in-place concrete; stiffening ribs 8 are welded to both sides of the upper web of the H-beam end 5, and the stiffening ribs 8 are arranged at intervals along the length direction of the H-beam end 5, which can improve the rigidity and force transmission stability of the H-beam end 5; the H-beam end 5 and the steel pipe are welded using a first-class weld.

[0031] like Figures 1 to 3 As shown, in this embodiment, preferably: the web member positioning plate 14 is provided on the top plate of the box-shaped web member end 10 and is partially cantilevered; a stiffening plate 16 is welded to the inner side of the box-shaped web member end 10, which can improve the rigidity and force transmission stability of the box-shaped web member end 10; the box-shaped web member end 10 and the steel pipe are welded with a first-class weld.

[0032] This node can be installed using a factory prefabrication + on-site assembly method, significantly reducing on-site wet work. Specifically: the H-beam end 5 and the remaining H-beam segments, the box-type web member end 10 and the remaining box-type web member segments, all positioning plates, all stiffening plates, stiffening ribs 8, stiffening plates 16, and support plates 15 are prefabricated in the factory, while the studs 6, stiffening ribs 8, stiffening plates 13, and support plates 15 are positioned and installed in the factory. In this embodiment, the H-beam end 5 and the remaining H-beam segments are made of Q355B steel, with the ends cut to fit the outer diameter of the steel pipe; the box-type web member end 10 and the remaining box-type web member segments are made of Q345B steel, with the ends cut to fit the outer diameter of the steel pipe; and all positioning plates are made of Q345B steel plate (thickness 10). mm), full weld connection (weld height ≥ 8mm), magnetic particle testing is performed after welding, each stiffening plate is made of Q235B steel plate (thickness 8mm), stiffening rib 8, stiffening plate 16, support plate 15 are made of Q345B steel plate (thickness 10mm); during on-site assembly, the bottom composite column segment is hoisted first, the verticality is corrected and then the foundation grouting material is poured, and then the remaining composite column segments are positioned and hoisted in sequence (steel pipe positioning plate 4 is welded before hoisting, and steel pipe positioning plate 4 is used to achieve docking positioning). When construction reaches the node area, the H-beam end 5, box web end 10, steel beam positioning plate 7, web positioning plate 14, and each stiffening plate are welded first, then the outer layer of steel reinforcement in the node area is installed, then the node area formwork is erected, and finally the concrete is poured (steel pipe positioning plate 4, steel beam positioning plate 7, and web positioning plate 14 are all cut off before pouring). The concrete strength grade of the inner and outer sides of the steel pipe of composite column 1 is C40.

[0033] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A connection node between a composite column and a steel truss beam, characterized in that: The composite column has transverse H-beam ends and inclined box-shaped web member ends welded to its steel pipe. The box-shaped web member ends are directly below the H-beam ends and welded together. The H-beam end furthest from the composite column has a steel beam positioning plate and a connecting plate for positioning when connecting adjacent H-beam segments. The box-shaped web member end furthest from the composite column has a web member positioning plate for positioning when connecting adjacent box-shaped web member segments. A transverse beam top reinforcement plate is welded to the steel pipe near the H-beam ends. This beam top reinforcement plate limits the height of the transverse longitudinal reinforcement near the beam top. The steel pipe is also welded with circumferentially distributed reinforcement... Several transverse grooved reinforcement plates are attached. The grooved reinforcement plates have slots and are used to radially limit the vertical longitudinal reinforcement and to limit the height of the stirrups. Vertical side reinforcement plates are welded to the left and right sides of the box-shaped web member end, and vertical bottom reinforcement plates are welded to the bottom of the box-shaped web member end. Both the side reinforcement plates and the bottom reinforcement plates are parallel to the arc surface of the steel pipe and are used to radially limit the vertical longitudinal reinforcement on the left and right sides and the bottom of the box-shaped web member end, respectively. A transverse front reinforcement plate is welded to the front side of the box-shaped web member end. The front reinforcement plate is used to limit the height of the transverse longitudinal members on the front side of the box-shaped web member end.

2. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: The composite columns are set in sections, and each section of the composite column has a steel pipe with a positioning plate welded on it for positioning when the composite column sections are joined.

3. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: The outer surface of the steel pipe of the composite column is welded with studs.

4. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: The steel beam positioning plate is located on the upper flange plate at the end of the H-shaped steel beam and is partially cantilevered. The steel beam connecting plate is located on both sides of the web plate at the end of the H-shaped steel beam and is partially cantilevered. Bolt holes are distributed on the steel beam connecting plate.

5. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: Studs are welded to the upper flange plate at the end of the H-beam.

6. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: Stiffening ribs are welded to both sides of the web plate at the end of the H-beam, and the stiffening ribs are arranged at intervals along the length of the end of the H-beam.

7. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: The positioning plate for the web members is located on the top plate at the end of the box-shaped web members and is partially cantilevered.

8. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: Stiffening plates are welded to the inner side of the ends of the box-shaped web members.

9. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: A support plate is welded between the bottom of the top reinforcement plate and the grooved reinforcement plate of the beam and the steel pipe of the composite column.

10. The connection node between the composite column and the steel truss beam as described in claim 1, characterized in that: The grooved reinforcing slabs are staggered in height.

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