An energy-dissipating and shock-absorbing upper node for assembled steel structure external wall panels

Abstract

The present invention discloses an energy-absorbing and shock-absorbing upper node for an assembled steel structure external wall panel, comprising a wall panel body and a steel beam, wherein the steel beam is connected to one end of the wall panel body through the energy-absorbing and shock-absorbing upper node, and the energy-absorbing and shock-absorbing upper node comprises a C-shaped energy-absorbing and shock-absorbing steel plate assembly and an angle steel connector connected to the C-shaped energy-absorbing and shock-absorbing steel plate assembly; the C-shaped energy-absorbing and shock-absorbing steel plate assembly is connected to the wall panel body through connecting bolts, and the angle steel connector is connected to the steel beam. The lower flange of the steel beam is provided with round bolt holes, and the number, diameter and spacing of the round bolt holes are adapted to the upper node. The upper end of the wall panel is provided with round bolt holes, and the number, diameter and spacing of the round bolt holes are adapted to the upper node.

Description

Technical Field

[0001] The invention relates to the field of construction, and in particular to an energy-dissipating and shock-absorbing upper node for an assembled steel structure external wall panel. Background Art

[0002] Prefabricated steel structure buildings are buildings that use steel materials to form a structure, and use a large number of prefabricated components produced in factories to replace traditional cast-in-place components, and are connected and assembled on the construction site. Prefabricated steel structure buildings have many advantages such as shortening construction period, being green and environmentally friendly, and saving resources, and are gradually becoming the development trend of the future construction industry.

[0003] Concrete external wall panels are the main component of the building envelope system of prefabricated steel frame structures. The external wall panels are connected to the main structure through nodes. Traditional external wall panel nodes mainly include rigid connection nodes and flexible connection nodes. Rigid connection nodes connect the external wall panels to the main structure as a whole by grouting or welding, and the external wall panels and the main structure are subjected to force and deformation together. The installation operation of rigid connection nodes is relatively cumbersome, and because the external wall panels and the main structure form a whole and bear force together, the wall panels will be subjected to large internal forces, and cracks or even damage and fall off are prone to occur in rare earthquakes; flexible connection nodes are provided with oblong limit holes, so that the bolts can move in a specific direction, allowing the external wall panels and the main structure to have relative displacement. The external wall panels will not generate large internal forces and be damaged under the action of rare earthquakes, but the strength and rigidity of the external wall panels are not fully utilized.

[0004] The external wall panels themselves have large overall stiffness and sufficient strength reserve, which provide a large stiffness contribution to the steel frame system, affecting the dynamic performance and seismic performance of the structural system (Yang Yun, Shi Xiaomeng. Design research on energy-absorbing nodes of external wall panels [J]. Low Temperature Building Technology, 2013, 35(03): 73-75.). Rigid connection can use the strength and stiffness within the plane of the wall panels to bear part of the horizontal load of the main structure, but when the structure is under the action of rare earthquakes, the external wall panels may bear large loads and generate large internal forces, causing cracks or even damage and falling off, causing serious earthquake damage (Hou Hetao, Zang Haitao, Wang Jingfeng. Application and research status of steel structure residential wall (panel) connection nodes [J]. Steel Structure, 2012, 27(09): 1-5.). The flexible connection method allows the external wall panels to have a certain ability to adapt to structural deformation and reduce the stress on the external wall panels because the external wall panels can have relative displacement with the main structure. However, this also reduces the contribution of the external wall panels to the structural rigidity and strength, so that the strength and rigidity reserve of the enclosure structure cannot be fully utilized, resulting in waste. At the same time, flexible connection nodes often require welding or on-site assembly of node components, and the installation process is relatively cumbersome. Summary of the invention

[0005] Against the above background, the purpose of the present invention is to provide an energy-absorbing and shock-absorbing upper node for prefabricated steel structure external wall panels, so as to solve the problems of cumbersome installation operation, poor seismic performance of wall panels, and insufficient utilization of wall panel strength and stiffness, which currently exist in prefabricated steel structure building nodes.

[0006] The present invention is achieved by at least one of the following technical solutions.

[0007] An energy-absorbing and shock-absorbing upper node for an assembled steel structure external wall panel comprises a wall panel body and a steel beam, wherein the steel beam is connected to one end of the wall panel body via the energy-absorbing and shock-absorbing upper node, and the energy-absorbing and shock-absorbing upper node comprises a C-shaped energy-absorbing and shock-absorbing steel plate assembly and an angle steel connector connected to the C-shaped energy-absorbing and shock-absorbing steel plate assembly; the C-shaped energy-absorbing and shock-absorbing steel plate assembly is connected to the wall panel body via connecting bolts, and the angle steel connector is connected to the steel beam.

[0008] Preferably, the C-shaped energy-absorbing and shock-absorbing steel plate assembly includes a No. 1 straight steel plate, a No. 2 straight steel plate, and a No. 3 straight steel plate, and the No. 3 straight steel plate is connected to the No. 1 straight steel plate and the No. 2 straight steel plate on both sides through a No. 1 semicircular steel plate and a No. 2 semicircular steel plate, respectively.

[0009] Preferably, the No. 1 straight steel plate and the No. 2 straight steel plate are symmetrically arranged in the same horizontal plane, and there is a gap between the No. 1 straight steel plate and the No. 2 straight steel plate.

[0010] Preferably, the No. 1 straight steel plate and the No. 2 straight steel plate are each provided with round bolt holes at symmetrical positions; the No. 1 straight steel plate and the No. 2 straight steel plate connect the C-shaped energy-absorbing and shock-absorbing steel plate assembly to the wall panel body through the round bolt holes.

[0011] Preferably, the angle steel connector includes a No. 1 side steel plate and a No. 2 side steel plate vertically connected to the No. 1 side steel plate.

[0012] Preferably, the outer surface of the No. 1 side steel plate is connected to the inner surface of the No. 3 straight steel plate by welding.

[0013] Preferably, the angle steel connector is welded on the side of the No. 3 straight steel plate facing the No. 1 straight steel plate and the No. 2 straight steel plate, and the angle steel connector and the straight steel plates of the C-shaped energy-absorbing and shock-absorbing steel plate assembly are both arranged horizontally.

[0014] Preferably, the No. 2 side steel plate is provided with a No. 3 round bolt hole and a No. 4 round bolt hole.

[0015] Preferably, the angle steel connector is provided with a triangular rib at the end.

[0016] Preferably, the second side steel plate is connected to the steel beam by bolts.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The energy-dissipating and shock-absorbing upper node of the assembled steel structure external wall panel is connected to the external wall panel and the steel beam by bolts to avoid wet work on site. All connecting parts of the energy-dissipating and shock-absorbing node can be disassembled and recycled. It has the advantages of convenient construction, easy replacement and maintenance, and cost saving;

[0019] 2. The present invention provides ribs at both ends of the angle steel connector to withstand torque and prevent the node from being torsionally deformed.

[0020] 3. Under the action of a relatively small earthquake, the node force of the present invention is less than the node yield force, the relative displacement of the No. 1, No. 2 and No. 3 straight steel plates is small, and the deformation of the semicircular steel plate is small, which can be approximately regarded as elastic deformation. The node is not damaged, and the node deformation is restored after the earthquake, and it can still be used normally. The node can be regarded as a rigid connection, so that the wall panel participates in the structural force and provides a certain rigidity and bearing capacity.

[0021] 4. Under the action of a larger earthquake, the node force of the present invention is greater than the node yield force, the relative displacement of the No. 1, No. 2 and No. 3 straight steel plates is large, and the deformation of the semicircular steel plate is large, which is plastic deformation. The node can be regarded as a flexible connection, allowing the external wall panel and the steel beam to produce relative displacement to adapt to the inter-layer displacement of the main body and avoid damage to the external wall panel. The C-shaped energy dissipation and shock-absorbing node dissipates seismic energy through the plastic deformation of the semicircular steel plate, and at the same time provides additional damping for the structure, which can reduce the seismic response of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a bottom view of an energy dissipation and shock absorption upper node for an assembled steel structure external wall panel according to this embodiment;

[0023] Figure 2 This is a schematic diagram of the upper node of the energy dissipation and shock absorption of this embodiment;

[0024] Figure 3 This is a schematic diagram of the connection between the upper node of the energy dissipation and shock absorption and the wall panel in this embodiment;

[0025] In the figure: 1. wall panel body, 2. steel beam, 3. energy dissipation and shock absorption upper node, 4. C-shaped energy dissipation and shock absorption steel plate assembly, 5. angle steel connector, 6. connecting bolts, 7. No. 1 straight steel plate, 8. No. 2 straight steel plate, 9. No. 3 straight steel plate, 10. No. 1 semicircular steel plate, 11. No. 2 semicircular steel plate, 12. No. 1 round bolt hole, 13. No. 2 round bolt hole, 14. triangular rib, 15. No. 1 side steel plate, 16. No. 2 side steel plate, 17. No. 3 round bolt hole, 18. No. 4 round bolt hole. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] For the convenience of description, if the words "upper", "lower", "inside" and "outside" appear in the present disclosure, they only indicate that they are consistent with the upper, lower, inside and outside directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present disclosure.

[0029] like Figure 3 An energy-absorbing and shock-absorbing upper node for an assembled steel structure external wall panel is shown, comprising a wall panel body 1 and a steel beam 2, wherein the steel beam 2 is arranged at one end of the wall panel body 1 via an energy-absorbing and shock-absorbing upper node 3.

[0030] like Figure 1 , Figure 2 As shown, the energy dissipation and shock absorption upper node 3 includes a C-shaped energy dissipation and shock absorption steel plate assembly 4, an angle steel connector 5, and a connecting bolt 6.

[0031] 11. The C-shaped energy-absorbing and shock-absorbing steel plate assembly 4 includes a straight steel plate No. 1 7, a straight steel plate No. 2 8, a straight steel plate No. 3 9, a semicircular steel plate No. 10, and a semicircular steel plate No. 2 11. The placement direction of the straight steel plate No. 1 7, the straight steel plate No. 2 8, and the straight steel plate No. 3 9 is the same as the web of the steel beam 2, and there is a gap between the straight steel plate No. 1 7 and the straight steel plate No. 2 8 that is perpendicular to the upper and lower edges of the steel plates. The two sides of the straight steel plate No. 3 9 are connected to the straight steel plate No. 1 7 and the straight steel plate No. 2 8 respectively through the semicircular steel plate No. 10 and the semicircular steel plate No. 2 11. The straight steel plates and the semicircular plates are formed integrally by pressing and molding from the same steel plate.

[0032] The first straight steel plate 7 and the second straight steel plate 8 are respectively provided with a first round bolt hole 12 and a second round bolt hole 13. The first straight steel plate 7 and the second straight steel plate 8 are respectively connected to the wall panel body 1 through connecting bolts 6.

[0033] The angle steel connector 5 includes a first side steel plate 15 and a second side steel plate 16 vertically connected to the first side steel plate 15 ; triangular ribs 14 are arranged on both sides of the angle steel connector 5 .

[0034] The second side steel plate 16 is provided with a third round bolt hole 17 and a fourth round bolt hole 18. The angle steel connector 5 is connected to the lower flange of the steel beam 2 by bolts.

[0035] The outer surface of the No. 1 side steel plate 15 is connected to the inner surface of the No. 3 straight steel plate 9 by welding.

[0036] A distance is set between the vertical intersection of the steel plates on both sides of the angle steel connector 5 and the edge of the No. 3 straight steel plate 9 so that the C-shaped energy-absorbing and shock-absorbing steel plate assembly 4 does not contact the lower flange of the steel beam 2 .

[0037] Working principle: The No. 1 straight steel plate 7 and the No. 2 straight steel plate 8 of the upper node 3 of the energy dissipation and shock absorption are fixed to the wall panel body 1 through the connecting bolts 6. The No. 3 straight steel plate 9 is fixed to the steel beam 2 through the angle steel connector 5. Under the action of an earthquake with a smaller magnitude, the upper node 3 of the energy dissipation and shock absorption is subjected to small force and small deformation, and can be regarded as a rigid node, and the wall panel body 1 and the steel beam 2 are subjected to force together. Under the action of an earthquake with a larger magnitude, the upper node 3 of the energy dissipation and shock absorption is subjected to large force and large deformation, and the semicircular steel plate undergoes plastic deformation to provide damping and consume energy. The deformation of the node allows the wall panel body 1 and the steel beam 2 to produce relative displacement to adapt to the inter-layer displacement and prevent the wall panel body 1 from being damaged and falling off.

[0038] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

[0039] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy dissipation and shock absorption upper node for an assembled steel structure external wall panel, characterized in that: The invention comprises a wall panel body (1) and a steel beam (2), wherein the steel beam (2) is connected to one end of the wall panel body (1) via an energy-absorbing and shock-absorbing upper node (3), and the energy-absorbing and shock-absorbing upper node (3) comprises a C-shaped energy-absorbing and shock-absorbing steel plate assembly (4) and an angle steel connecting piece (5) connected to the C-shaped energy-absorbing and shock-absorbing steel plate assembly (4); the C-shaped energy-absorbing and shock-absorbing steel plate assembly (4) is connected to the wall panel body (1) via a connecting bolt (6), and the angle steel connecting piece (5) is connected to the steel beam (2); the C-shaped energy-absorbing and shock-absorbing steel plate assembly (4) comprises a A straight steel plate (7), a second straight steel plate (8), and a third straight steel plate (9); the second straight steel plate (9) is connected to the first straight steel plate (7) and the second straight steel plate (8) via a first semicircular steel plate (10) and a second semicircular steel plate (11) on both sides; the first straight steel plate (7) and the second straight steel plate (8) are symmetrically arranged in the same horizontal plane, and a gap is provided between the first straight steel plate (7) and the second straight steel plate (8); the first straight steel plate (7), the second straight steel plate (8), the third straight steel plate (9), the first semicircular steel plate (10) and the second semicircular steel plate (11) are connected to the first straight steel plate (7) and the second straight steel plate (8) via a first semicircular steel plate (10) and a second semicircular steel plate (11) on both sides; the first straight steel plate (7) and the second straight steel plate (8) are symmetrically arranged in the same horizontal plane, and a gap is provided between the first straight steel plate (7) and the second straight steel plate (8); the first straight steel plate (7), the second straight steel plate (8), the third straight steel plate (9), the first semicircular steel plate (10) and the second semicircular steel plate (11) The first straight steel plate (7) and the second straight steel plate (8) are formed into one piece by pressing from the same steel plate; the first straight steel plate (7) and the second straight steel plate (8) are provided with round bolt holes at symmetrical positions; the first straight steel plate (7) and the second straight steel plate (8) connect the C-shaped energy-absorbing and shock-absorbing steel plate assembly (4) to the wall panel body (1) through the round bolt holes; the angle steel connector (5) comprises a first side steel plate (15) and a second side steel plate (16) vertically connected to the first side steel plate (15); the outer surface of the first side steel plate (15) is welded The angle steel connector (5) is welded to the side of the No. 3 straight steel plate (9) facing the No. 1 straight steel plate (7) and the No. 2 straight steel plate (8), and the angle steel connector (5) and the straight steel plates of the C-shaped energy-absorbing and shock-absorbing steel plate assembly (4) are both arranged transversely; a distance is set between the vertical intersection of the No. 1 side steel plate (15) and the No. 2 side steel plate (16) of the angle steel connector and the edge of the No. 3 straight steel plate (9), so that the C-shaped energy-absorbing and shock-absorbing steel plate assembly (4) does not contact the lower flange of the steel beam (2).

2. The energy dissipation and shock absorption upper node for assembled steel structure external wall panels according to claim 1 is characterized in that: The No. 2 side steel plate (16) is provided with a No. 3 round bolt hole (17) and a No. 4 round bolt hole (18).

3. The energy dissipation and shock absorption upper node for assembled steel structure external wall panels according to claim 2 is characterized in that: The angle steel connecting piece (5) is provided with a triangular rib plate (14) at the end.

4. An energy dissipation and shock absorption upper node for assembled steel structure external wall panels according to any one of claims 1 to 3, characterized in that: The second side steel plate (16) is connected to the steel beam (2) via bolts.

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