Damping device for assembled building beam-column joint

Abstract

The application discloses an assembled building beam-column joint damping device, and aims to solve the technical problem of easy breakage and poor anti-seismic capability of the joint caused by rigid connection of the prior art.The device comprises a groove frame used for being embedded in a corresponding prefabricated column and provided with two opposite sliding grooves, a damping component slidingly embedded in the sliding grooves, a steel beam in corresponding connection with the damping component and with end portions embedded in the groove frame, and corner-shaped connecting pieces with two side walls in corresponding surface connection with the prefabricated column and the steel beam.The damping component and the corner-shaped connecting pieces can effectively dissipate the energy accumulated at the beam-column joint during an earthquake, reduce the damage to the joint, and improve the anti-seismic capability of the assembled building.

Description

Technical Field

[0001] This application relates to the field of prefabricated building technology, specifically to a vibration damping device for beam-column joints in prefabricated buildings. Background Technology

[0002] Prefabricated building structures are an important development trend in the current construction industry. Various components of prefabricated building structures are prefabricated in specialized factories and then assembled using various connection methods. Compared with traditional cast-in-place structures, the components of prefabricated building structures are of better quality due to the controllable construction environment and proper curing. They can also reduce labor input by utilizing machinery and equipment in the factory and effectively improve production efficiency. The assembly method is also more green and environmentally friendly, reducing pollution such as dust and noise. Therefore, prefabricated building structures are constantly being applied and developed.

[0003] Assembly nodes are critical connections between components in prefabricated building structures. They typically employ rigid connections, and their mechanical properties directly impact the seismic performance of the prefabricated structure, thus affecting the building's safety. Compared to cast-in-place structures, rigid connections between components cannot dissipate seismic energy after an earthquake, causing energy accumulation at the nodes. This makes the nodes highly susceptible to loosening or even breakage and detachment, affecting the building's structural integrity and potentially leading to tilting or collapse, severely jeopardizing life and property safety.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this disclosure provides a vibration damping device for beam-column joints in prefabricated buildings, which aims to solve the technical problems of easy breakage and poor seismic resistance caused by the rigid connection of beam-column joints in prefabricated buildings in the prior art.

[0006] According to one aspect of this disclosure, a vibration damping device for beam-column joints of prefabricated buildings is provided, including a groove frame for being embedded in a corresponding prefabricated column and having two opposing sliding grooves, a vibration damping component slidably embedded in the sliding grooves, a steel beam correspondingly connected to the vibration damping component and having its ends correspondingly embedded in the groove frame, and angular connectors whose side walls are respectively connected to the corresponding surfaces of the prefabricated column and the steel beam.

[0007] The shock absorption assembly includes two sliding rods with sliding members corresponding to the sliding groove at both ends, and two connecting rods hinged in the middle. Each of the two connecting rods has a sleeve for being fitted into the sliding rod at both ends. It also includes a spring fitted onto each of the sliding rods and located between the sliding member and the corresponding sleeve, and between the two sleeves. The angular connector includes an angular connector body with a right angle and an inter-wall elastic sheet hinged between the two side walls of the angular connector body.

[0008] In some embodiments of this disclosure, the lengths of the springs located between the slider and the corresponding sleeve are the same.

[0009] In some embodiments of this disclosure, the two connecting rods are of the same length.

[0010] In some embodiments of this disclosure, the damping assembly further includes an inter-tube elastic sheet hinged between the sleeves on the same side of the two slide rods.

[0011] In some embodiments of this disclosure, the end of the groove corresponding to the interior of the precast column is closed, and a cylindrical slide rail with a length consistent with the length of the groove is fixedly provided at the end. The sliding member is provided with a slot corresponding to the slide rail, and a spring is sleeved on the slide rail between the two sliding members and between the two end faces of the groove and the corresponding sliding member.

[0012] In some embodiments of this disclosure, a spring is fixedly provided between two sliding members located in the same slide groove.

[0013] In some embodiments of this disclosure, a connecting plate corresponding to the end of the steel beam is slidably connected between the two sleeves near the steel beam, and a screw for connecting the steel beam is fixedly provided on the surface of the connecting plate corresponding to the surface of the steel beam; the steel beam and the shock absorption assembly are fixedly connected by a nut corresponding to the screw of the connecting plate, and a rubber gasket is provided between the steel beam and the nut.

[0014] In some embodiments of this disclosure, hinge seats corresponding to the inter-wall elastic sheets are respectively provided at the corresponding positions on the two side walls of the angular connector body.

[0015] One or more technical solutions provided in the embodiments of this application have at least one of the following technical effects or advantages: through the cooperation of the sliding groove and the sliding member, when the steel beam is subjected to force and swaying during an earthquake, the force in its left and right directions can be transmitted to the spring on the sliding rod and the elastic plate between the tubes of the sliding rod through the two connecting rods with the middle hinge. The energy is dissipated through the elastic deformation of the spring and the elastic plate, so as to ensure the stability of the node to a certain extent; and through the wall elastic plates of the corner connectors around the steel beam, when the steel beam and the precast column node are subjected to force during an earthquake, causing the steel beam to sway in its four directions, the energy can be dissipated, further ensuring the stable connection of the node. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a prefabricated building beam-column joint in one embodiment of this application.

[0017] Figure 2 This is an exploded structural diagram of a prefabricated building beam-column joint in one embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the structure of the slot frame in one embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of a shock-absorbing component in one embodiment of this application.

[0020] Figure 5 This is a cross-sectional schematic diagram of a beam-column joint in a prefabricated building according to one embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the structure of the angled connector in one embodiment of this application.

[0022] In the above figures, 10 is a precast column, 11 is a steel beam, 20 is a groove frame, 21 is a sliding groove, 3 is a shock absorption component, 30 is a sliding member, 31 is a sliding rod, 32 is a connecting rod, 33 is a sleeve, 34 is a spring, 4 is an angle connector, 41 is the body of the angle connector, and 42 is an inter-wall elastic sheet. Detailed Implementation

[0023] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "vertical," "horizontal," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "connection" and "linkage" in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0024] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] This example discloses a vibration damping device for beam-column joints in prefabricated buildings. (See also...) Figure 1 It is installed at the connection between the precast column 10 and the square steel beam 11 to reduce vibration at the beam-column joints of prefabricated buildings and dissipate the energy transmitted by seismic waves. See also Figure 2 The beam-column joint damping device mainly includes a groove frame 20, a damping component 3, and an angle connector 4.

[0026] The slot frame 20 is used to embed within the precast column 10. During prefabrication, a mold matching the slot frame 20 is used to prefabricate a slot at the connection between the precast column 10 and the steel beam 11, allowing the slot frame 20 to be tightly installed. In this example, the slot frame 20 is made of welded steel plates. It serves two purposes: firstly, to provide support points for the damping components and the steel beam; and secondly, to strengthen the structural strength of the slot in the precast column 10, preventing the pre-reserved slot from affecting the load-bearing capacity of that area. In this example, the damping component 3 needs to dissipate seismic energy through a certain reciprocating displacement. To limit the displacement path of the damping component 3 and ensure its reliability in energy dissipation, considering that the thickness between the left and right sides of the precast column is shorter than its vertical height, to minimize the impact of the slot corresponding to the slot frame 20 on the structural strength of the precast column, sliding grooves 21 are provided on the upper and lower exterior sides of the slot frame 20. (See [reference]). Figure 3 This ensures that the groove 21 is positioned vertically above the precast column 10, thus avoiding the problem of insufficient thickness between the sides of the groove and the corresponding sides of the precast column. In this embodiment, to ensure smooth sliding of the damping component 3 in the groove 21, the groove 21 is polished before use to ensure a smooth, burr-free surface. Furthermore, in this embodiment, to increase the joint strength between the precast column 10 and the steel beam 11, the groove frame 20 matches the end of the steel beam 11. When connecting the steel beam 11 and the precast column 10, the end of the steel beam 11 can be inserted into the groove frame 20. Since the groove frame 20 is embedded in the precast column 10, the steel beam 11 can be inserted into the precast column 10, forming a mortise and tenon structure, which achieves the purpose of strengthening the connection between the precast column 10 and the steel beam 11.

[0027] The shock-absorbing component is slidably embedded in the slot frame 20, see [reference]. Figure 4 The damping assembly includes two sliding rods 31 with sliding members 30 at both ends, two connecting rods 32 hinged in the middle, sleeves 33 hinged to both ends of the connecting rods, and springs 34. In this example, two cylindrical sliding rods are provided, which are made by cutting seamless steel pipes of a certain length. The sliding members 30 are welded to both ends of the rods. The sliding members 30 are slidably embedded in the grooves 21 on both sides of the groove frame 20. Their outline matches the cross-section of the grooves 21, so that they are embedded in the grooves 21 and do not wobble when moving along the grooves 21, thus avoiding affecting the reliable connection of the other components of the damping assembly. In this example, the sliding members 30 are made of I-beams that match the grooves 21 and are welded to both ends of the sliding rods 31. The distance between the two outer surfaces of the sliding members 30 at both ends of the sliding rods 31 is the same as the distance between the bottoms of the two grooves 21, so that the sliding rods can be fitted between the two grooves without wobbling.

[0028] In addition, to achieve the damping effect, see Figure 4 Two connecting rods 32 are hinged in the middle, and sleeves 33 are hinged to both ends of the two connecting rods 32. The inner diameter of the sleeves 33 matches the outer diameter of the slide rod 31, and they are slidably fitted into the slide rod 31. Springs 34 are provided on the slide rod 31 between the sliding members 30 on both sides and the corresponding side sleeves 33, and between the two sleeves 33 on the slide rod 31. Since the shock-absorbing component 3 is slidably embedded in the groove 21, and the end of the steel beam 11 is embedded in the groove frame 20 and abuts against the shock-absorbing component 3. Therefore, see Figure 5 During an earthquake, the steel beam 11 and the precast column 10 experience swaying due to the force exerted on them. Furthermore, the force along the steel beam 11, or its component, causes displacement between the precast column 10 and the steel beam 11 along the direction of the steel beam 11. This displacement is then transmitted from the end of the steel beam 11, which abuts against the sleeve 33, to the damping assembly 3. Since the two sliding members 30 near the inside of the groove frame 20 abut against the inside of the groove of the precast column 10, the groove of the precast column limits the sliding rod 31 on the inner side of the groove frame. When the sliding rod on the outer side of the groove frame 20 is compressed by the steel beam 11, the sliding members 30 at both ends slide inward along the sliding groove 21. Through the transmission of the connecting rod 32, the sleeves 33 on the two sliding rods 31 move towards the corresponding sliding members 30. When the slide bar moves to 0, it reaches the unfolded state, and the spring between the sliding member 30 and the sleeve 33 is compressed and deformed. Similarly, when the force direction along the steel beam 11 changes, the sleeves 33 on the two slide bars 31 are retracted to the middle of the slide bar 31 under the action of the spring force on both sides of the slide bar. The spring between the two sleeves in the middle of the slide bar 31 is used to dissipate the inertia of the springs on both sides and store energy. When the sleeves on the slide bar move to both sides again, the energy is released. Thus, the energy brought by the earthquake at the node is collected between the springs on both sides and the middle spring and transferred to each spring. The energy is continuously stored and released by the deformation of the springs, and finally the purpose of accumulating and dissipating energy at the node is achieved, ensuring the connection at the node is stable.

[0029] To ensure uniform force transmission between the two sliding rods, in this example, the two connecting rods 32 are of equal length, and the hinge between the two connecting rods 32 is located in the middle of the connecting rods 32; and the springs between each sleeve 33 and the corresponding side sliding member 30 have the same length, and the springs in the upper middle part of the two sliding rods 31 located between the two sleeves 33 also have the same length. Furthermore, in this embodiment, to further accelerate energy dissipation at the beam-column joint, see [reference needed]. Figure 4An inter-tube elastic plate is hinged at the hinge position between the sleeve 33 and the connecting rod on the same side between the two sliding rods 31. During vibration, when the distance between the two sliding rods 31 changes due to the transmission action of the connecting rod 32, some energy is dissipated through the elastic properties of the inter-tube elastic plate, enhancing the vibration reduction effect. In this example, springs (not shown in the figure) are respectively installed in the two sliding grooves 21, between the two sliding members 30, and between the sliding member 30 and the end face of the corresponding side groove frame. The ends of the springs corresponding to the sliding members 30 are welded and fixed to the sliding members. Thus, when the sliding member 30 moves under force in the sliding groove during vibration, some energy is dissipated through the springs in the sliding groove, further improving the vibration reduction effect. In some other embodiments, the end of the slide groove 21 corresponding to the interior of the precast column 10 is sealed by welding steel plates, and a columnar slide rail with the same length as the slide groove 21 is welded on the sealing steel plate at the end, so that the slide rail is in the slide groove 21, and the sliding member 30 is provided with a slot corresponding to the slide rail, so that it can be fitted onto the slide rail and slide. Springs are fitted on the slide rail between the two sliding members and between the end faces of the slide groove and the corresponding side sliding members, and the shock absorption capacity is improved by the springs at the slide groove.

[0030] In other embodiments, the steel beam 11 is connected to the damping assembly 3 via a connecting plate. The outline of the connecting plate is smaller than or equal to the end face of the steel beam 11. Several screws are fixedly mounted on the side of the connecting plate to connect with the end of the steel beam 11 via corresponding nuts. A connecting plate groove is provided on the other side of the connecting plate. Two sleeves near the end of the steel beam 11 have corresponding tenons for engaging with the connecting plate groove. This allows the damping assembly 3 to slide between one sleeve and the connecting plate groove, thereby connecting it to the steel beam. This ensures that the damping assembly is always in contact with the damping assembly for energy transfer. Furthermore, a rectangular rubber washer of a certain thickness is provided between the nut connecting the connecting plate and the steel beam 11 and the end face of the steel beam. The rubber material absorbs vibration energy at the screw-nut connection point to a certain extent, stabilizing the connection between the two.

[0031] See Figure 6 The angular connector 4 includes an angular connector body 41 with a right angle between it and an inter-wall elastic sheet 42 hinged between the two side walls of the angular connector body 41. See also Figure 1Angle-shaped connectors are located around the connection between the steel beam 11 and the precast column 10. On one hand, the stable connection between the angle-shaped connectors and the steel beam 11 and precast column 10 achieves the limiting and fixing of the steel beam 11 and the precast column 10. On the other hand, the inter-wall elastic plates 42 between the two side walls of the angle-shaped connectors dissipate energy of forces or component forces perpendicular to the direction of the steel beam 11, achieving a stable node connection and vibration reduction effect. In this embodiment, the angle-shaped connector body 41 is made of angle steel, with bolt holes corresponding to its two side walls. Bolts are pre-installed in the precast column 10 during prefabrication to fix the angle-shaped connectors. The angle-shaped connectors are connected to the steel beam 11 by bolts. In other embodiments, the angle-shaped connectors are welded to the steel beam 11 to avoid having too many bolt holes at the end of the steel beam 11, which would affect the strength of the steel beam. Furthermore, the connection between the angle-shaped connectors 4 and the precast column 10 not only limits the steel beam but also limits the slot frame 20. In this example, see... Figure 6 The two ends of the inter-wall elastic plate 42 are hinged to the two side walls of the angle connector body 41 via hinge seats, and the hinge seats are welded and fixed to the two side walls of the angle connector body 41. Thus, when the force or component force perpendicular to the steel beam 11 increases to a certain extent at the node during an earthquake, it will generate energy that causes the angle connector body 41 to deform. This energy is then dissipated through the inter-wall elastic plate 42 between the two side walls of the angle connector body 41, preventing the angle connector from breaking due to severe deformation.

[0032] Since the forces generated at the joint during an earthquake are in all directions, they can all be decomposed into those along the direction of steel beam 11 and those perpendicular to steel beam 11. Therefore, the energy at the joint is released by the dissipation of the force perpendicular to steel beam 11 through the angle connector, the dissipation of the force along the direction of steel beam 11 through the damping component, and the certain extensibility of the angle connector, which greatly reduces the damage of earthquake energy to the beam-column joint connection.

[0033] Although some preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0034] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of the invention. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A vibration damping device for beam-column joints in prefabricated buildings, characterized in that, It includes a groove frame for being embedded in a corresponding precast column and having two opposing sliding grooves, a shock-absorbing component that is slidably embedded in the sliding groove, a steel beam that is correspondingly connected to the shock-absorbing component and whose ends are correspondingly embedded in the groove frame, and an angled connector whose side walls are respectively connected to the corresponding surfaces of the precast column and the steel beam; The shock absorption assembly includes two slide rods with sliding members corresponding to the slide groove at both ends, and two connecting rods hinged in the middle. Each of the two connecting rods has a sleeve for being fitted into the slide rod at both ends. It also includes a spring fitted onto each of the slide rods and located between the sliding member and the corresponding sleeve, and between the two sleeves. The angular connector includes an angular connector body with a right angle and an inter-wall elastic sheet hinged between the two side walls of the angular connector body.

2. The vibration damping device for beam-column joints of prefabricated buildings according to claim 1, characterized in that, The lengths of the springs located between the sliding member and the corresponding sleeve are the same.

3. The vibration damping device for beam-column joints of prefabricated buildings according to claim 1, characterized in that, The two connecting rods are of the same length.

4. The vibration damping device for beam-column joints of prefabricated buildings according to claim 1, characterized in that, The shock absorption assembly also includes an inter-tube elastic sheet hinged between the sleeves on the same side of the two slide rods.

5. The vibration damping device for beam-column joints of prefabricated buildings according to claim 1, characterized in that, The end of the groove corresponding to the inside of the precast column is closed, and a cylindrical slide rail with the same length as the groove is fixed at the end. The sliding member has a slot corresponding to the slide rail. Springs are sleeved on the slide rail between the two sliding members and between the two end faces of the groove and the corresponding sliding members.

6. The vibration damping device for beam-column joints of prefabricated buildings according to claim 1, characterized in that, A spring is fixedly provided between two sliding parts located in the same slide groove.

7. The vibration damping device for beam-column joints of prefabricated buildings according to claim 1, characterized in that, A connecting plate corresponding to the end of the steel beam is slidably connected between the two sleeves near the steel beam. A screw for connecting the steel beam is fixedly provided on the surface of the connecting plate corresponding to the steel beam. The steel beam and the shock absorption assembly are fixedly connected by the screw and the corresponding nut, and a rubber gasket is provided between the steel beam and the nut.

8. The vibration damping device for beam-column joints of prefabricated buildings according to claim 1, characterized in that, The two side walls of the angular connector body are respectively provided with hinge seats corresponding to the inter-wall elastic plates.

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