Fabricated multi-stage energy dissipation self-resetting concrete filled steel tube beam column joint

Abstract

The utility model belongs to the technical field of steel pipe concrete beam column connecting joints, and particularly relates to an assembly type multi-step energy dissipation self-resetting steel pipe concrete beam column joint which comprises a first connecting assembly, a second connecting assembly and a third connecting assembly. The second connecting assembly is fixedly connected with the steel beam; the friction energy dissipation assembly is arranged between the first connecting assembly and the second connecting assembly; the second energy dissipation assembly is arranged between the first connecting assembly and the second connecting assembly and located on the two opposite sides of the friction energy dissipation assembly; and the self-resetting assembly is arranged between the steel beam and the first connecting assembly, and the self-resetting assembly penetrates through the second connecting assembly. Energy generated by an earthquake can be consumed step by step, damage of the earthquake to the beam-column connecting joint is reduced, the self-resetting assembly enables the beam-column joint to restore to the original state after the earthquake is finished, maintenance and replacement cost and time are reduced, and meanwhile the self-resetting beam-column joint is easy to install and convenient to repair after being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel tube concrete beam-column connection nodes, in particular to an assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node. Background Art

[0002] Although the prefabricated nodes currently used to connect steel tube concrete beams and columns have achieved relatively convenient construction, they cannot yet achieve self-resetting, and there is still room for further improvement in terms of functionality.

[0003] In the prior art, patent publication number N217557178U discloses a novel prefabricated self-resetting friction beam-column joint, comprising a reinforced concrete column, a reinforced concrete beam, and a beam-column connection assembly. One end of the beam-column connection assembly is connected to the reinforced concrete column via a steel channel, and the other end of the beam-column connection assembly is connected to the reinforced concrete beam via a high-strength friction energy-absorbing bolt. The beam-column connection assembly comprises a first connector, a second connector, a first side plate, a second side plate, and a limit plate. The first and second side plates are disposed between the first and second connectors, and a plurality of SMA rods are disposed between the first and second side plates. Limit plates are disposed at the right ends of the first and second connectors. A drawback of this technical solution is that the shape memory alloy rods require complex processes such as heat treatment and heat training before use, and the high price of shape memory alloys hinders their promotion in practical applications. Utility Model Content

[0004] The purpose of the utility model is to provide an assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node to solve the above problems.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] Prefabricated multi-stage energy-absorbing self-resetting steel tube concrete beam-column joint, including:

[0007] A first connecting assembly is fixedly connected to the concrete-filled steel tube column;

[0008] a second connecting assembly, fixedly connected to the steel beam;

[0009] a friction energy dissipation component, disposed between the first connecting component and the second connecting component;

[0010] a second energy dissipation component, disposed between the first connecting component and the second connecting component and located on two opposite sides of the friction energy dissipation component;

[0011] A self-resetting component is arranged between the steel beam and the first connecting component, and the self-resetting component passes through the second connecting component.

[0012] Preferably, the first connecting component includes:

[0013] A box-shaped connecting block is fixedly connected to the steel tube concrete column through a plurality of through bolts.

[0014] Preferably, the second connecting component includes:

[0015] The steel beam end panel is fixedly connected to one end of the steel beam.

[0016] Preferably, the friction energy dissipation component includes:

[0017] Two arc-shaped connecting plates are arranged in parallel and symmetrically. Both of the arc-shaped connecting plates are fixed to the outer side wall of the box-shaped connecting block. A gap is left between the two arc-shaped connecting plates. NAO friction plates are fixed to opposite sides of the two arc-shaped connecting plates.

[0018] Another arc-shaped connecting plate is rotatably connected between the two arc-shaped connecting plates through arc-shaped connecting plate bolts. The other arc-shaped connecting plate is fixed to the steel beam end panel. NAO friction plates are fixed on opposite sides of the other arc-shaped connecting plate, and the two adjacent NAO friction plates are in friction contact with each other.

[0019] Preferably, the second energy-consuming component includes:

[0020] A plurality of mild steel energy-absorbing elements are respectively arranged on opposite sides of the two arc-shaped connecting plates and are symmetrically arranged. The two ends of the mild steel energy-absorbing elements are respectively fixedly connected to the box-shaped connecting block and the steel beam end panel by a plurality of bolts.

[0021] Preferably, the self-resetting component includes:

[0022] Multiple steel strands are respectively arranged on two opposite sides of the steel beam and are symmetrically arranged. The two steel strands on the same side are symmetrically arranged up and down. One end of the steel strand is connected to the end of the steel beam away from the steel beam end panel through an anchor, and the other end of the steel strand is connected to the box-shaped connecting block through the anchor. The steel strand passes through the steel beam end panel.

[0023] Preferably, three of the mild steel energy-absorbing elements are provided on one side of the arc-shaped connecting plate, one of which is close to the upper portion of the steel beam end panel, and the other two are close to the lower portion of the steel beam end panel.

[0024] Compared with the prior art, the present invention has the following advantages and technical effects:

[0025] The multi-stage energy-absorbing and self-resetting beam-column node of the present invention, when encountering a small earthquake, the steel beam and the steel tube concrete column rotate, resulting in relative displacement, at which time the friction energy-absorbing component consumes friction energy; when encountering a medium or large earthquake, the rotation angle between the steel beam and the steel tube concrete column reaches its limit, at which time the second energy-absorbing component starts to work and consumes energy, thereby reducing the damage caused by vibration to the beam-column node. The self-resetting component enables the beam-column node of the present invention to return to its original state after the earthquake, reducing the cost and time of maintenance and replacement.

[0026] The utility model can consume the energy generated by the earthquake step by step, reduce the damage caused by the earthquake to the beam-column connection nodes, and the self-resetting components can restore the beam-column nodes of the utility model to their original state after the earthquake, reducing the cost and time of maintenance and replacement. At the same time, the various components of the utility model are prefabricated in the factory and transported to the site for splicing with bolts, without the need for on-site welding, and are simple to install and easy to repair after damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work:

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 This is a schematic structural diagram of the friction energy dissipation component in the present utility model;

[0030] Among them, 1. Box-shaped connecting block; 2. Arc-shaped connecting plate; 3. Steel beam; 4. Mild steel energy-absorbing element; 5. Bolt; 6. Steel strand; 7. Anchor; 8. Steel tube concrete column; 9. Through bolt; 2-1. Arc-shaped connecting plate bolt; 3-1. Steel beam end panel. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] Reference Figures 1 to 2 The utility model discloses an assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node, comprising:

[0034] A first connecting assembly is fixedly connected to the steel tube concrete column 8;

[0035] A second connecting assembly is fixedly connected to the steel beam 3;

[0036] A friction energy dissipation component is provided between the first connecting component and the second connecting component;

[0037] A second energy dissipation component is provided between the first connecting component and the second connecting component and is located on two opposite sides of the friction energy dissipation component;

[0038] The self-resetting component is arranged between the steel beam 3 and the first connecting component, and the self-resetting component passes through the second connecting component.

[0039] The multi-stage energy-absorbing and self-resetting beam-column node of the present invention is mainly used for the connection of steel tube concrete beams and columns. When a small earthquake occurs, the steel beam 3 and the steel tube concrete column 8 rotate, resulting in relative displacement. At this time, the friction energy-absorbing component consumes energy by friction; when a medium or large earthquake occurs, the rotation angle between the steel beam 3 and the steel tube concrete column 8 reaches its limit. At this time, the second energy-absorbing component starts to work and consumes energy, thereby reducing the damage caused by vibration to the beam-column node. The self-resetting component enables the beam-column node of the present invention to return to its original state after the earthquake, reducing the cost and time of maintenance and replacement.

[0040] The utility model can consume the energy generated by the earthquake step by step, reduce the damage caused by the earthquake to the beam-column connection nodes, and the self-resetting components can restore the beam-column nodes of the utility model to their original state after the earthquake, reducing the cost and time of maintenance and replacement. At the same time, the various components of the utility model are prefabricated in the factory and transported to the site for splicing with bolts, without the need for on-site welding, and are simple to install and easy to repair after damage.

[0041] Further optimizing the solution, the first connection component includes:

[0042] The box-shaped connecting block 1 is fixedly connected to the steel tube concrete column 8 through multiple through-bolts 9.

[0043] Further optimizing the solution, the second connection component includes:

[0044] The steel beam end panel 3-1 is fixedly connected to one end of the steel beam 3.

[0045] To further optimize the solution, the friction energy dissipation components include:

[0046] Two arc-shaped connecting plates 2 are arranged parallel and symmetrically. Both arc-shaped connecting plates 2 are fixed to the outer wall of the box-shaped connecting block 1. There is a gap between the two arc-shaped connecting plates 2. NAO friction plates are fixed to the opposite sides of the two arc-shaped connecting plates 2.

[0047] Another arc-shaped connecting plate 2 is rotatably connected between the two arc-shaped connecting plates 2 via an arc-shaped connecting plate bolt 2-1. The other arc-shaped connecting plate 2 is fixed to the steel beam end panel 3-1. NAO friction plates are fixed on both opposite sides of the other arc-shaped connecting plate 2, and the two adjacent NAO friction plates are in friction contact with each other.

[0048] Further optimizing the solution, the second energy consumption component includes:

[0049] Multiple mild steel energy-absorbing elements 4 are respectively arranged on the two opposite sides of the two arc-shaped connecting plates 2 and are symmetrically arranged. The two ends of the mild steel energy-absorbing elements 4 are fixedly connected to the box-shaped connecting block 1 and the steel beam end panel 3-1 by multiple bolts 5.

[0050] To further optimize the solution, the self-resetting components include:

[0051] Multiple steel strands 6 are arranged on opposite sides of the steel beam 3 and are symmetrically arranged. The two steel strands 6 on the same side are symmetrically arranged up and down. One end of the steel strand 6 is connected to the end of the steel beam 3 away from the steel beam end panel 3-1 through the anchor 7, and the other end of the steel strand 6 is connected to the box-shaped connecting block 1 through the anchor 7. The steel strand 6 runs through the steel beam end panel 3-1.

[0052] As a further optimization scheme, three soft steel energy absorbing elements 4 are provided on one side of the arc-shaped connecting plate 2, wherein one soft steel energy absorbing element 4 is close to the upper part of the steel beam end panel 3-1, and the other two soft steel energy absorbing elements 4 are close to the lower part of the steel beam end panel 3-1.

[0053] Working principle:

[0054] The components of the utility model are prefabricated in the factory and then transported to the site for assembly. The components are connected by bolts, and no on-site welding is required. The construction requirements are low and the construction is convenient and fast.

[0055] When an earthquake occurs, a rotation occurs between the steel beam 3 and the steel tube concrete column 8. At this time, a relative displacement occurs between the arc-shaped connecting plates 2 on both sides and the other arc-shaped connecting plate 2 in the middle. At this time, the NAO friction plates in friction contact with each other also produce relative displacement, which plays a role in friction energy dissipation.

[0056] When the earthquake is large, the rotation angle between the steel beam 3 and the steel tube concrete column 8 reaches its limit. At this time, the soft steel energy dissipation element 4 begins to yield and consume energy under the joint action of the steel beam 3 and the steel tube concrete column 8, thereby preventing the beam-column connection node from being damaged by the earthquake;

[0057] After the earthquake, the prestressed steel strands 6 drive the steel beams 3 to automatically reset.

[0058] When the beam-column connection node is damaged, the damaged part can be directly replaced, which is convenient and simple.

[0059] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. Assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node, characterized by: include: A first connecting assembly fixedly connected to the steel tube concrete column (8); A second connecting assembly is fixedly connected to the steel beam (3); a friction energy dissipation component, disposed between the first connecting component and the second connecting component; a second energy dissipation component, disposed between the first connecting component and the second connecting component and located on two opposite sides of the friction energy dissipation component; A self-resetting component is arranged between the steel beam (3) and the first connecting component, and the self-resetting component passes through the second connecting component.

2. The assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node according to claim 1 is characterized in that: The first connection component includes: A box-shaped connecting block (1) is fixedly connected to the steel tube concrete column (8) via a plurality of through-bolts (9).

3. The assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node according to claim 2 is characterized in that: The second connection component includes: The steel beam end panel (3-1) is fixedly connected to one end of the steel beam (3).

4. The assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node according to claim 3 is characterized in that: The friction energy dissipation component comprises: Two arc-shaped connecting plates (2) are arranged in parallel and symmetrically, and the two arc-shaped connecting plates (2) are fixed on the outer side wall of the box-shaped connecting block (1), a gap is left between the two arc-shaped connecting plates (2), and NAO friction plates are fixed on opposite sides of the two arc-shaped connecting plates (2); Another arc-shaped connecting plate (2) is rotatably connected between the two arc-shaped connecting plates (2) via an arc-shaped connecting plate bolt (2-1), the other arc-shaped connecting plate (2) is fixedly connected to the steel beam end panel (3-1), and NAO friction plates are fixedly connected to opposite sides of the other arc-shaped connecting plate (2), and the two adjacent NAO friction plates are in friction contact.

5. The assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column node according to claim 4 is characterized in that: The second energy consuming component comprises: A plurality of soft steel energy-absorbing elements (4) are respectively arranged on opposite sides of the two arc-shaped connecting plates (2) and are symmetrically arranged. The two ends of the soft steel energy-absorbing elements (4) are respectively fixedly connected to the box-shaped connecting block (1) and the steel beam end panel (3-1) by a plurality of bolts (5).

6. The assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column joint according to claim 3 is characterized in that: The self-resetting component comprises: A plurality of steel strands (6) are respectively arranged on opposite sides of the steel beam (3) and are symmetrically arranged. The two steel strands (6) on the same side are symmetrically arranged up and down. One end of the steel strand (6) is connected to the end of the steel beam (3) away from the steel beam end panel (3-1) through an anchor (7), and the other end of the steel strand (6) is connected to the box-shaped connecting block (1) through the anchor (7). The steel strand (6) passes through the steel beam end panel (3-1).

7. The assembled multi-stage energy-absorbing self-resetting steel tube concrete beam-column joint according to claim 5 is characterized in that: Three soft steel energy-absorbing elements (4) are provided on one side of the arc-shaped connecting plate (2), one of the soft steel energy-absorbing elements (4) is close to the upper part of the steel beam end panel (3-1), and the other two soft steel energy-absorbing elements (4) are close to the lower part of the steel beam end panel (3-1).

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