Non-buckling herringbone steel pipe concrete supporting structure

Abstract

The invention provides a non-buckling herringbone steel pipe concrete supporting structure which comprises a frame beam, a herringbone steel pipe concrete support and a vertical sliding connection joint. The intersection point of the end parts of the herringbone steel pipe concrete support is connected with the frame beam through the vertical sliding connection node, the vertical sliding connection node does not transmit the vertical force of the frame beam to the support, and the vertical deformation of the support does not cause the vertical force in the frame beam; the principle that the compression bearing capacity is larger than the tension bearing capacity in a certain slenderness ratio of the concrete-filled steel tube rod piece is used for design, no matter which direction the horizontal force comes from, the bearing capacity of the herringbone concrete-filled steel tube support compression limb is always larger than that of the tension limb, and the herringbone concrete-filled steel tube support compression limb is prevented from being damaged before the tension limb; meanwhile, the vertical sliding connection node can only transmit horizontal force and cannot transmit vertical force, so that the vertical force in the frame beam caused by compression of the herringbone concrete filled steel tube support compression limb and extension of the tension limb can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure buildings, in particular to a buckling-free herringbone steel tube concrete supporting structure. Background Art

[0002] As the construction industry's requirements for green buildings and prefabricated buildings increase, steel structures are increasingly being used in high-rise buildings. The traditional hybrid structure of steel frame + reinforced concrete core tube is increasingly unable to meet policy requirements and is gradually being eliminated. The full steel structure of steel frame + inter-column steel support has begun to enter the market in large quantities. Compared with the cross inter-column steel support, the herringbone inter-column steel support has a larger space below and can achieve the continuity of traffic lines, which is deeply loved by architects. The composition of the traditional herringbone inter-column steel support is shown in the figure. Figure 6 As shown, (quoted from the Ministry of Construction standard "Technical Specification for Steel Structures of High-Rise Civil Buildings" (JGJ99-2015) Figure 7 .5.1-1(c)), its connection with the floor beams is shown in Figure 7 As shown, (quoted from the Ministry of Construction standard "Technical Specification for Steel Structures of High-Rise Civil Buildings" (JGJ99-2015) Figure 8 .7.2(b), (d)), because the cross-sections of the two supporting members of the A-shaped column brace are always the same, and the bearing capacity of the compression member is always less than the bearing capacity of the tension member due to the unloading effect of the compression member, so the following will occur Figure 8 The deformation mode shown in the figure shows that under the action of a rare earthquake, the beams will bend or even break, causing the house to collapse and bringing catastrophic consequences to the building structure. Summary of the Invention

[0003] The purpose of the present invention is to provide a herringbone steel tube concrete support system without vertical component and buckling.

[0004] To achieve the above object, the present invention proposes a buckling-free herringbone steel tube concrete support structure, comprising a frame beam, a herringbone steel tube concrete support and a vertical sliding connection node;

[0005] The intersection of the ends of the herringbone steel tube concrete support is connected to the frame beam through a vertical sliding connection node. The vertical sliding connection node does not transmit the vertical force of the frame beam to the support, and the vertical deformation of the support also causes vertical force because it is not inside the frame beam; the bearing capacity of the compression support of the herringbone steel tube concrete support is greater than the bearing capacity of the tension limb.

[0006] Furthermore, the vertical sliding connection node includes a force transmission plate and two baffles;

[0007] The force transfer plate is fixed horizontally to the end of the herringbone steel tube concrete support; the two baffles are arranged vertically to the force transfer plate, located at both ends of the force transfer plate, pressing the force transfer plate tightly but not connecting them; the two baffles are welded and fixed to the bottom of the frame beam.

[0008] Furthermore, a plurality of first stiffening plates are provided between the baffle and the frame beam;

[0009] A limit plate is welded and fixed below both sides of the baffle to prevent the force transmission plate from sliding out.

[0010] Furthermore, the herringbone steel tube concrete support includes a tension limb and a compression limb; a support connecting plate is inserted into the ends of the tension limb and the compression limb, and the ends of the two support connecting plates intersect to form the herringbone steel tube concrete support;

[0011] The ends of the tension limb and the compression limb are located on both sides of the support connecting plate, and both ends are sealed by an obliquely arranged support sealing plate.

[0012] Furthermore, the plug-in end of the support connecting plate is provided with a stress release hole, and the release hole is provided on the surface of the steel pipe of the tension limb and the compression limb.

[0013] Furthermore, a plurality of second stiffening plates are provided between the force transmission plate and the supporting connection plate; and a plurality of third stiffening plates are provided between the supporting connection plate and the supporting sealing plate.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. This invention utilizes the principle that the compressive bearing capacity of concrete-filled steel tubular members is greater than their tensile bearing capacity within a certain slenderness ratio. This design creates an intercolumn brace. Regardless of the direction of the horizontal force, the compressive bearing capacity of the herringbone concrete-filled steel tubular support is always greater than that of the tensile limb, thus preventing the compressive limb from failing before the tensile limb. Even if the tensile limb experiences significant deformation, it will not fail, but instead dissipate energy, thus achieving a vibration-absorbing effect.

[0016] 2. This invention utilizes the principle that close contact between the force transfer plate and the baffle plate can transmit pressure, creating a connection node that can only transmit horizontal forces, but not vertical forces. This node does not transmit the vertical forces of the frame beam to the support, and the vertical deformation of the support does not cause vertical forces because it is not within the frame beam. This node design simplifies the overall internal force analysis process of the building structure.

[0017] 3. The present invention expands the application scope of herringbone steel tube concrete supports in building structures, increases the use of reusable materials in building structures, improves the assembly rate of structures, promotes the sustainable development of the construction industry, improves the seismic resistance of structures, and enhances the safety of structures.

[0018] 4. The stress relief holes of the present invention prevent stress concentration in the steel pipe at the end of the support connecting plate, thereby avoiding the risk of cracks and breakage of the steel tube concrete support at this location under the action of earthquake reciprocating loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a buckling-free herringbone steel tube concrete support structure in an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the three-dimensional structure of the vertical sliding connection node 4 in an embodiment of the present invention

[0021] Figure 3 It is a front view of the structure of the vertical sliding connection node 4 in an embodiment of the present invention.

[0022] Figure 4 Schematic diagram of the bottom structure of the frame beam of the vertical sliding connection node 4 in an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the stress and deformation of the buckling-free herringbone steel tube concrete support structure in an embodiment of the present invention.

[0024] Figure 6 Schematic diagram of a support frame consisting of a traditional herringbone steel support, frame beams, and frame columns in an embodiment of the present invention.

[0025] Figure 7 Schematic diagram of the connection method between the traditional herringbone support and the frame beam in an embodiment of the present invention.

[0026] Figure 8 2 is a diagram showing the stress and deformation pattern of a traditional herringbone support frame in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.

[0028] Based on the description in the background technology, the traditional A-shaped steel support between columns has the same cross-section of the two supporting rods, and the bearing capacity of the compression rod is always smaller than that of the tension rod due to the unloading effect of the compression rod, so the following will occur: Figure 8 The deformation mode shown in the figure shows that under the action of a rare earthquake, the beams will bend or even break, causing the house to collapse and bringing catastrophic consequences to the building structure.

[0029] Based on this, this embodiment utilizes the principle that the compressive bearing capacity of concrete-filled steel tubular members is greater than their tensile bearing capacity within a certain slenderness ratio. This design creates an inter-column brace. Regardless of the direction of the horizontal force, the compressive bearing capacity of the herringbone concrete-filled steel tubular support is always greater than the tensile bearing capacity of the tensile limb. This prevents the compressive limb from failing before the tensile limb. Even if the tensile limb experiences significant deformation, it will not fail, but instead dissipate energy, thus achieving a vibration-absorbing effect.

[0030] The specific structure is as follows: Figure 1 and Figure 4 As shown, the present invention proposes a buckling-free herringbone steel tube concrete-filled support structure, which consists of three parts: a frame beam 1, a herringbone steel tube concrete-filled support 3, and a vertical sliding connection node 4. The lower end of the herringbone steel tube concrete-filled support 3 is connected to the foundation 5, and the upper end is connected to the frame beam 1 at the intersection 7 via the vertical sliding connection node 4. The vertical sliding connection node 4 does not transmit the vertical force of the frame beam 1. The herringbone steel tube concrete-filled support 3, by rationally controlling the cross-section of the steel tube concrete-filled rod (primarily in terms of material strength and slenderness ratio), can ensure that the bearing capacity of the compression limb is always greater than that of the tension limb, thus avoiding buckling and failure of the compression rod and ensuring the safety of the entire building structure.

[0031] In this embodiment, if Figure 2 、 Figure 3 and Figure 4 As shown, the vertical sliding connection node 4 includes a force transfer plate 8 and two baffles 9; the force transfer plate 8 is horizontally fixed to the end of the herringbone steel tube concrete support 3; the two baffles 9 are arranged perpendicular to the force transfer plate 8, respectively located at the two ends of the force transfer plate 8, to tighten the force transfer plate 8 but not welded; the two baffles 9 are welded and fixed to the bottom of the frame beam 1. In this way, the horizontal force 6 can be transmitted between the force transfer plate 8 and the baffles 9 through the contact surface, but because there is no welding between the two, they can slide in the vertical direction, and therefore cannot transmit the vertical force of the frame beam to the support, and the vertical deformation of the support does not cause vertical force in the frame beam. Figure 3 As shown, a limit plate 12 is welded and fixed below the baffles 9 at both ends to prevent the force transmission plate from sliding out. The baffle is welded to the bottom of the frame beam 1, and multiple first stiffening plates 10 are set. Under stress, the structural diagram is as shown Figure 5 As shown, the frame beam 1 is fixed on the frame column 2, and the herringbone steel tube concrete support 3 is fixed on the foundation 5 (the beam-column node when located above the second floor); when the floor is subjected to the horizontal force 6 of wind or earthquake, the horizontal force 6 can be transmitted to the baffle, and the baffle then transmits the horizontal force 6 to the force transmission plate. The force transmission plate transmits the horizontal force at the position 7 to the herringbone steel tube concrete support, and the inter-column support transmits the horizontal force 6 to the foundation 5. The force flow is continuous and complete, and the horizontal force is reliably applied to the ground.

[0032] In order to ensure the stress strength of each node of the buckling-free herringbone steel tube concrete support structure, the structure of the herringbone steel tube concrete support 3 is as follows: the herringbone steel tube concrete support 3 includes a tension limb 3a and a compression limb 3b; a support connecting plate 15 is inserted at the end of each of the tension limb 3a and the compression limb 3b, and the ends of the two support connecting plates 15 intersect to form the herringbone steel tube concrete support 3; the ends of the tension limb 3a and the compression limb 3b are located on both sides of the support connecting plate 15, and are sealed by an obliquely arranged support sealing plate 14, which can transmit part of the axial force of the support 3 to the connecting plate 15. The plug-in end of the support connecting plate 15 and the tension limb 3a and the compression limb 3b is provided with a stress relief hole 16, and the relief hole is provided on the steel tube surface of the tension limb 3a and the compression limb 3b. A plurality of second stiffening plates 11 are provided between the force transmission plate 8 and the supporting connection plate 15 ; a plurality of third stiffening plates 13 are provided between the supporting connection plate 15 and the supporting sealing plate 14 .

[0033] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any way. Any person skilled in the art who, without departing from the scope of the present invention, makes any equivalent substitution, modification, or other changes to the technical solution and technical content disclosed in the present invention shall be deemed to be within the scope of the present invention and still fall within the scope of protection of the present invention.

Claims

1. A buckling-free herringbone steel tube concrete support structure, characterized in that: It includes frame beams, herringbone steel tube concrete supports and vertical sliding connection nodes; The intersection of the ends of the herringbone steel tube concrete support is connected to the frame beam through the vertical sliding connection node. The vertical sliding connection node does not transmit the vertical force of the frame beam to the support, and the vertical deformation of the support also causes vertical force because it does not occur in the frame beam. The bearing capacity of the compression limb of the herringbone steel tube concrete support is always greater than the bearing capacity of the tension limb.

2. The buckling-free herringbone steel tube concrete supporting structure according to claim 1, characterized in that: The vertical sliding connection node includes a force transmission plate and two baffles; The force transfer plate is horizontally fixed to the end of the herringbone steel tube concrete support; two baffles are arranged vertically to the force transfer plate, respectively located on both sides of the force transfer plate, pressing the force transfer plate tightly but not connected; the two baffles are welded and fixed to the bottom of the frame beam.

3. The buckling-free herringbone steel tube concrete supporting structure according to claim 2, characterized in that: A plurality of first stiffening plates are provided between the baffle and the frame beam; A limiting plate is welded and fixed below both sides of the baffle to prevent the force transmission plate from sliding out.

4. The buckling-free herringbone steel tube concrete supporting structure according to claim 1, characterized in that: The herringbone steel tube concrete support includes a tension limb and a compression limb; the ends of the tension limb and the compression limb are each plugged with a support connecting plate, and the ends of the two support connecting plates intersect to form the herringbone steel tube concrete support; The ends of the tension limb and the compression limb are located on both sides of the support connecting plate, and both ends are sealed by an obliquely arranged support sealing plate.

5. The buckling-free herringbone steel tube concrete supporting structure according to claim 4, characterized in that: The plug-in end of the support connecting plate is provided with a stress release hole, and the release hole is provided on the surface of the steel pipe of the tension limb and the compression limb.

6. The buckling-free herringbone steel tube concrete supporting structure according to claim 4, characterized in that: A plurality of second stiffening plates are provided between the force transmission plate and the supporting connecting plate; a plurality of third stiffening plates are provided between the supporting connecting plate and the supporting sealing plate.

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