Damper replaceable steel beam-column joint with double energy dissipation system

Abstract

The utility model discloses a kind of damper replaceable steel beam column nodes with double energy dissipation system, including steel beam, steel column is arranged in steel beam side, connecting piece is arranged between steel beam and steel column, the connecting piece includes welding in the beam end end plate of steel beam side near steel column, the second rectangular connecting plate is welded in the side of beam end end plate away from steel beam;By design replaceable metal damper, the node energy dissipation component is not influenced by floor, easy to disassemble and replace, can greatly improve construction efficiency and reduce on-site construction difficulty, the node uses double energy dissipation system, simultaneously dissipates seismic energy using the plastic deformation and friction two kinds of energy dissipation mechanism of metal damper, improves overall seismic performance, by adjusting the friction coefficient between column end lug and beam end lug, the pre-tightening force of pre-tightening pin shaft, the section size of metal damper, the size parameter of long slot hole, different seismic demand can be adapted.

Description

Technical Field

[0001] This utility model belongs to the field of structural engineering technology, specifically relating to a replaceable steel beam-column joint with a damper and a dual energy dissipation system. Background Technology

[0002] my country is a country prone to earthquakes, with most areas located in high-intensity zones. Traditional earthquake-resistant design prioritizes protecting lives, using ductile design to prevent structural collapse under strong earthquakes. This ductile design achieves this through plastic deformation of the main load-bearing components, which can lead to excessive post-earthquake damage and residual deformation. In fact, recent earthquake disasters have shown that while the number of casualties has been effectively controlled, the economic losses caused by earthquakes remain enormous. The main economic losses stem from severe damage to buildings during earthquakes, which are difficult to repair afterward. In response to this situation, and in line with technological innovation and the national requirements for resilient city construction, engineering experts have developed a recoverable functional structural system. This system, through optimized design, controls earthquake damage to replaceable secondary components, protecting the safety of the main structure while enabling rapid post-earthquake repair. This ensures that buildings can quickly return to normal use with little or no repair after an earthquake.

[0003] Replaceable component structures are a typical form of recoverable functional structures. Currently, scholars from various countries have developed some nodes with replaceable energy-dissipating components, but existing technologies still have significant drawbacks. Most replaceable nodes have complex construction forms, and energy-dissipating components are mostly arranged on the upper flange of the beam. The presence of the floor slab will make it difficult to disassemble and replace the energy-dissipating components after an earthquake. A single energy dissipation mechanism is prone to insufficient energy dissipation capacity of the structure under a major earthquake or loss of usability due to the failure of a single energy-dissipating component, thus affecting the full realization of structural performance. For example, existing nodes that mainly use friction energy dissipation are prone to low energy dissipation capacity and bearing capacity under a major earthquake because the friction force is not changeable under seismic action. Furthermore, the aging of the friction surface will reduce its energy dissipation capacity, and the friction surface is not easy to replace. For nodes that use metal dampers for plastic deformation energy dissipation, the failure of a single energy-dissipating component can easily lead to the loss of the structure's bearing capacity. Viscoelastic dampers have a serious temperature sensitivity effect and high replacement and maintenance costs. Therefore, we propose a replaceable steel beam-column node with a damper and a dual energy dissipation system. Utility Model Content

[0004] The purpose of this invention is to provide a replaceable steel beam-column joint with a damper and a dual energy dissipation system. By designing a replaceable metal damper, the energy dissipation component of this joint is not affected by the floor slab, is easy to disassemble and replace, and can significantly improve construction efficiency and reduce on-site construction difficulty. This joint adopts a dual energy dissipation system, which utilizes both plastic deformation and friction of the metal damper to dissipate seismic energy, thereby improving the overall seismic resistance. By adjusting the friction coefficient between the column end ear plate and the beam end ear plate, the preload of the preload pin, the cross-sectional dimensions of the metal damper, and the dimensions of the long slot, it can adapt to different seismic requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a replaceable steel beam-column joint with a damper and a dual energy dissipation system, comprising a steel beam, a steel column on one side of the steel beam, a connector between the steel beam and the steel column, the connector including a beam end plate welded to the side of the steel beam near the steel column, second rectangular connecting plates welded to both the front and rear sides of the beam end plate away from the steel beam, second stiffening plates welded to the top and bottom of the beam end plate away from the steel beam, the second stiffening plates and the second rectangular connecting plates being welded together, and a beam end ear plate welded to the side of the beam end plate away from the steel beam, a column end ear plate provided at one end of the beam end ear plate, and a pre-connected joint inserted between the column end ear plate and the beam end ear plate. The column end ear plate has a circular hole for the pre-tightening pin to pass through, and the beam end ear plate has a long slot for the pre-tightening pin to pass through. The end of the column end ear plate away from the beam end ear plate is welded to the steel column. The front and rear ends of the column end ear plate are provided with first rectangular connecting plates, which are welded to the steel column. The top and bottom of the two adjacent surfaces of the first rectangular connecting plates are welded with first stiffening plates, and the sides of the first stiffening plates are also welded to the steel column. A metal damper is also provided between the first rectangular connecting plate and the second rectangular connecting plate. The front two ends of the metal damper are connected to the first rectangular connecting plate and the second rectangular connecting plate by friction-type high-strength bolts.

[0006] Preferably, a brass sheet is also provided at the connection between the column end ear plate and the beam end ear plate.

[0007] Preferably, the column end ear plate, the first stiffening plate, and the first rectangular connecting plate constitute the column conversion end.

[0008] Preferably, the beam end lug, beam end plate, second stiffening plate, and second rectangular connecting plate constitute the beam transition end.

[0009] Preferably, the first stiffening plate and the second stiffening plate, and the first rectangular connecting plate and the second rectangular connecting plate have the same dimensions.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By designing a replaceable metal damper, the energy-consuming components of this node are not affected by the floor slab and are easy to disassemble and replace. The node adopts a fully bolted connection design, and all components can be prefabricated in the factory, which meets the technical requirements of prefabricated buildings for intelligent construction and sustainable development, and can significantly improve construction efficiency and reduce on-site construction difficulty.

[0012] 2. This node adopts a dual energy dissipation system, which simultaneously utilizes the plastic deformation and friction of the metal damper to dissipate seismic energy. This conforms to the multi-layered fortification principle in seismic design, with energy dissipation at each stage complementing each other, avoiding overload failure of a single mechanism, and improving the overall seismic robustness.

[0013] 3. By adjusting the friction coefficient between the column end ear plate and the beam end ear plate, the preload of the preload pin, the cross-sectional dimensions of the metal damper, and the dimensions of the long slot, different seismic requirements can be met. The inter-story drift angle corresponding to the contact between the preload pin and the ear plate hole wall can be used as the deformation threshold of the node. It can be adjusted according to the design requirements and set as the next line of defense to improve the collapse resistance of the structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0015] Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention;

[0016] Figure 3 This is a three-dimensional structural diagram of the column end lug plate of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the beam end lug plate of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the metal damper of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the first rectangular connecting plate of this utility model;

[0020] Figure 7 This is a three-dimensional structural diagram of the first stiffening plate of this utility model;

[0021] The components include: 1. Steel beam; 2. Steel column; 3. Column end lug; 4. Beam end lug; 5. Circular hole; 6. Long slot; 7. Preload pin; 8. First stiffening plate; 9. First rectangular connecting plate; 10. Beam end plate; 11. Second stiffening plate; 12. Second rectangular connecting plate; 13. Metal damper; 14. Friction type high-strength bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 This utility model provides a technical solution: a replaceable steel beam-column joint with a damper and a dual energy dissipation system, including a steel beam 1, a steel column 2 on one side of the steel beam 1, and a connector between the steel beam 1 and the steel column 2. The connector includes a beam end plate 10 welded to the side of the steel beam 1 near the steel column 2, and second rectangular connecting plates 12 welded to both the front and back of the beam end plate 10 away from the steel beam 1. Second stiffening plates 11 are welded to the top and bottom of the beam end plate 10 away from the steel beam 1. The second stiffening plates 11 and the second rectangular connecting plates 12 are welded together. A beam end ear plate 4 is also welded to the side of the beam end plate 10 away from the steel beam 1. A column end ear plate 3 is provided at one end of the beam end ear plate 4. A pre-tightening pin 7 is inserted between the column end ear plate 3 and the beam end ear plate 4. A circular hole 5 is opened on the surface of the column end ear plate 3 for the pre-tightening pin 7 to pass through. The surface is provided with a long slot 6 for the pre-tightening pin 7 to pass through. The end of the column end ear plate 3 away from the beam end ear plate 4 is welded to the steel column 2. The front and rear ends of the column end ear plate 3 are provided with a first rectangular connecting plate 9. The first rectangular connecting plate 9 is welded to the steel column 2. The top and bottom of the two first rectangular connecting plates 9 that are close to each other are both welded with a first stiffening plate 8. The side of the first stiffening plate 8 is also welded to the steel column 2. A metal damper 13 is also provided between the first rectangular connecting plate 9 and the second rectangular connecting plate 12. The front two ends of the metal damper 13 are connected to the first rectangular connecting plate 9 and the second rectangular connecting plate 12 by friction type high-strength bolts 14. The column end ear plate 3, the first stiffening plate 8, and the first rectangular connecting plate 9 form the column conversion end. The beam end ear plate 4, the beam end plate 10, the second stiffening plate 11, and the second rectangular connecting plate 12 form the beam conversion end.

[0024] The energy dissipation system of this node is an artificial plastic energy dissipation hinge composed of a friction hinge and a metal damper 13, which provides rotational stiffness and energy dissipation capacity for the node. The friction hinge consists of a column end lug 3, a beam end lug 4, and a preload pin 7. By applying a preload force to the preload pin 7, friction is provided between the column end lug 3 and the beam end lug 4. Under seismic excitation, the node rotates around the center of the friction hinge, causing the upper end of the metal damper 13 to be compressed and the lower end of the metal damper 13 to be tensile. The energy dissipation mechanism mainly relies on the plastic deformation of the metal damper 13 and the frictional rotation between the column end lug 3 and the beam end lug 4. The long slot 6 ensures that the node has sufficient frictional sliding space, avoiding horizontal contact between the metal damper 13 and the ear plate hole wall, which would cause damage to the ear plate connector. At the same time, the metal damper 13 is made of low yield point steel with excellent ductility and hysteresis performance, ensuring that the node has good seismic performance. During the stress process, except for the metal damper 13, the other components are basically in an elastic state or only produce minor residual deformation. Since the damage is concentrated in the metal damper 13, the node function can be restored by replacing this component after the earthquake, which is in line with the restorative design concept.

[0025] In this embodiment, preferably, a brass sheet is also provided at the connection between the column end ear plate 3 and the beam end ear plate 4. Although the strength of brass is lower than that of structural steel, it is sufficient to withstand the "local extrusion load" between the ear plates, avoiding surface damage caused by hard friction when the ear plates are in direct contact, ensuring the stability of the force transmission path, and improving the service life of the ear plates.

[0026] In this embodiment, preferably, the first stiffening plate 8 and the second stiffening plate 11, and the first rectangular connecting plate 9 and the second rectangular connecting plate 12 are the same size, which facilitates better connection of the various components together.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A damper replaceable steel beam-column joint with a dual energy dissipation system, comprising a steel beam (1), a steel column (2) disposed on one side of the steel beam (1), and a connector disposed between the steel beam (1) and the steel column (2), characterized in that: The connector includes a beam end plate (10) welded to the side of the steel beam (1) near the steel column (2). A second rectangular connecting plate (12) is welded to both the front and back of the beam end plate (10) away from the steel beam (1). A second stiffening plate (11) is welded to the top and bottom of the beam end plate (10) away from the steel beam (1). The second stiffening plate (11) and the second rectangular connecting plate (12) are welded together. A beam end ear plate (4) is also welded to the side of the beam end plate (10) away from the steel beam (1). A column end ear plate (3) is provided at one end of the beam end ear plate (4). A preload pin (7) is inserted between the column end ear plate (3) and the beam end ear plate (4). A circular hole (5) is provided on the surface of the column end ear plate (3) for the preload pin (7) to pass through. The plate (4) has a long slot (6) for the pre-tightening pin (7) to pass through. The end of the column end ear plate (3) away from the beam end ear plate (4) is welded to the steel column (2). The front and rear ends of the column end ear plate (3) are provided with a first rectangular connecting plate (9). The first rectangular connecting plate (9) is welded to the steel column (2). The top and bottom of the two adjacent surfaces of the first rectangular connecting plates (9) are both welded with a first stiffening plate (8). The side of the first stiffening plate (8) is also welded to the steel column (2). A metal damper (13) is also provided between the first rectangular connecting plate (9) and the second rectangular connecting plate (12). The front two ends of the metal damper (13) are connected to the first rectangular connecting plate (9) and the second rectangular connecting plate (12) by friction-type high-strength bolts (14).

2. The replaceable steel beam-column joint with a damper and a dual energy dissipation system according to claim 1, characterized in that: A brass sheet is also provided at the connection between the column end ear plate (3) and the beam end ear plate (4).

3. A replaceable steel beam-column joint with a damper and a dual energy dissipation system as described in claim 1, characterized in that: The column end ear plate (3), the first stiffening plate (8), and the first rectangular connecting plate (9) constitute the column conversion end.

4. A replaceable steel beam-column joint with a damper and a dual energy dissipation system as described in claim 1, characterized in that: The beam end ear plate (4), beam end plate (10), second stiffening plate (11), and second rectangular connecting plate (12) constitute the beam transition end.

5. A replaceable steel beam-column joint with a damper and a dual energy dissipation system according to claim 1, characterized in that: The first stiffening plate (8) and the second stiffening plate (11), and the first rectangular connecting plate (9) and the second rectangular connecting plate (12) have the same dimensions.

Images