Multifunctional adjustable damper for timber beam-column joint reinforcement

Abstract

The application provides a multifunctional adjustable energy dissipation device for wood structure beam-column joint reinforcement, which comprises a friction damper, the friction damper comprising a bearing capacity adjusting device, a stiffness adjusting device and an amplification coefficient adjusting device, one end of the bearing capacity adjusting device being rotatably installed at the connection of the wood structure beam-column joint, the other end of the bearing capacity adjusting device being connected with the amplification coefficient adjusting device through the stiffness adjusting device, and both ends of the amplification coefficient adjusting device being rotatably connected to the beam and the column of the wood structure beam-column joint respectively. The pre-tightening force can be adjusted by the bearing capacity adjusting device to determine the bearing capacity range of the friction damper, and the friction energy dissipation and shock absorption are only carried out when the damper is subjected to a force greater than the bearing capacity, so that the key basic principles of the wood structure, namely, minimum interference, reversibility and integrity, are not disturbed. The stiffness adjusting device and the amplification coefficient adjusting device are arranged to realize high energy dissipation efficiency of the damper and achieve the stiffness adjustment and support reinforcement functions of the damper.

Description

Technical Field

[0001] This invention relates to the field of beam-column structure technology, and in particular to a multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures. Background Technology

[0002] Timber structures are a traditional architectural form in my country and a relatively superior structural form, still widely used today. Beams and columns are usually the main load-bearing components of a structure, and their stability is crucial, especially the beam-column joints, which are more susceptible to earthquake damage. Domestic research on seismic mitigation techniques for traditional timber structures started relatively late. Beam-column joints are typically reinforced using methods such as patching, iron reinforcement, and chemical strengthening. These seismic strengthening methods often do not meet the key fundamental principles of timber structures, such as minimal disturbance, reversibility, and integrity.

[0003] In addition, some beam-column joints in existing technologies also use energy-dissipating dampers for vibration reduction, but these dampers have low energy dissipation efficiency and cannot achieve stiffness adjustment and support functions. Summary of the Invention

[0004] To address the aforementioned issues, this invention aims to propose a multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures. By incorporating a load-bearing capacity adjustment device, the preload can be adjusted to determine the load-bearing capacity range of the friction damper. Frictional energy dissipation and vibration reduction only occur when the damper is subjected to loads exceeding the load-bearing capacity, thus avoiding interference with the key fundamental principles of timber structures: minimal interference, reversibility, and integrity. A stiffness adjustment device is included to adjust the initial stiffness of the friction damper. An amplification factor adjustment device amplifies minor vibrations generated at the beam-column joint, allowing the damper to enter the energy dissipation stage earlier and transmit the energy to the load-bearing capacity and stiffness adjustment devices. This achieves high energy dissipation efficiency and fulfills both stiffness adjustment and support reinforcement functions.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures includes a friction damper. The friction damper includes a load-bearing capacity adjustment device, a stiffness adjustment device, and an amplification factor adjustment device. One end of the load-bearing capacity adjustment device is rotatably mounted at the connection of the beam-column joint in the timber structure, and the other end is connected to the amplification factor adjustment device through the stiffness adjustment device. The two ends of the amplification factor adjustment device are respectively rotatably connected to the beam and column of the beam-column joint in the timber structure.

[0007] Furthermore, the load-bearing capacity adjustment device includes a sub-plate, a main plate, high-strength bolts, connecting ear plates, pins, and nut a. The sub-plate consists of two pieces. One end of each sub-plate is rotatably connected to the connection point of the wooden beam-column joint via a pin and connecting ear plate. The other end of each sub-plate is clamped to the main plate via a high-strength bolt and nut a. The high-strength bolt passes through a sliding hole on the main plate.

[0008] Furthermore, it also includes elastic washers, and there are four high-strength bolts and four nuts a, with the main board clamped between the high-strength bolts and nuts a by the elastic washers.

[0009] Furthermore, it also includes a connecting plate and stiffening ribs. The upper end of the connecting plate is welded to the main board, and several stiffening ribs are provided between the upper end of the connecting plate and the main board.

[0010] Furthermore, the stiffness adjustment device includes a screw, a disc spring a, a disc spring b, and a nut b. The lower end of the connecting plate is slidably connected to the screw. The disc spring a is slidably sleeved on the screw inside the connecting plate, and the disc spring b is slidably sleeved on the screw outside the connecting plate. The upper end of the disc spring a and the lower end of the disc spring b are both adjusted and limited by the nut b.

[0011] Furthermore, the amplification factor adjustment device includes a hinge support, which is installed at the end of a screw via a nut. Both ends of the hinge support are rotatably connected to a connecting rod a via a screw shaft. Connecting rod a is tunably connected to a connecting rod b, and connecting rod b is tunably connected to a positioning adjustment steel plate. The positioning adjustment steel plate is installed on a beam or column.

[0012] Furthermore, the connecting ends of the connecting rod a and the connecting rod b are provided with a plurality of bolt holes along the length direction, and the connecting rod a and the connecting rod b are connected and fixed by connecting bolt a through the bolt holes.

[0013] Furthermore, the positioning and adjusting steel plate is provided with a plurality of bolt holes, and one end of the connecting rod b is connected to the positioning and adjusting steel plate through the connecting bolt b and the corresponding bolt holes.

[0014] Furthermore, it also includes node outer steel, which is installed at the connection of the beam-column joint of the wooden structure, and the positioning and adjusting steel plate is installed on the node outer steel.

[0015] Beneficial effects: This invention determines the bearing capacity range of the friction damper by adjusting the preload through a bearing capacity adjustment device. Friction energy dissipation and vibration reduction only occur when the damper is subjected to a load greater than the bearing capacity, thus avoiding interference with the key basic principles of timber structures: minimal interference, reversibility, and integrity. A stiffness adjustment device is set up to adjust the initial stiffness of the friction damper. An amplification coefficient adjustment device is set up to amplify the small vibrations generated at the beam-column joints, thereby enabling the damper to enter the energy dissipation stage earlier and transmit the energy to the bearing capacity adjustment device and the stiffness adjustment device. This achieves high energy dissipation efficiency of the damper and realizes the functions of stiffness adjustment and support reinforcement of the damper. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 This is a schematic diagram illustrating the application effect of the multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures as described in an embodiment of the present invention.

[0018] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0019] Figure 3 This is a side view of the installation effect of the multifunctional adjustable energy dissipator for reinforcing beam-column joints of a wooden structure as described in an embodiment of the present invention;

[0020] Figure 4 This is a three-dimensional structural schematic diagram of the multifunctional adjustable energy dissipator for reinforcing beam-column joints in a timber structure as described in an embodiment of the present invention;

[0021] Figure 5 This is a partial exploded view of the multifunctional adjustable energy dissipator for reinforcing beam-column joints in a timber structure, as described in an embodiment of the present invention.

[0022] Figure 6 This is a partial structural side view of the multifunctional adjustable energy dissipator for reinforcing beam-column joints in a timber structure, as described in an embodiment of the present invention. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] See Figure 1-6A multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures includes a friction damper 2. The friction damper 2 includes a load-bearing capacity adjustment device 21, a stiffness adjustment device 22, and an amplification factor adjustment device 23. One end of the load-bearing capacity adjustment device 21 is rotatably installed at the connection of the timber beam-column joint 1, and the other end is connected to the amplification factor adjustment device 23 through the stiffness adjustment device 22. The two ends of the amplification factor adjustment device 23 are rotatably connected to the beam 11 and the column 12 of the timber beam-column joint 1, respectively.

[0027] In this embodiment, the bearing capacity adjustment device can adjust the preload to determine the bearing capacity range of the friction damper. Friction energy dissipation and vibration reduction will only occur when the damper is subjected to a load greater than the bearing capacity, thus not interfering with the key basic principles of the timber structure: minimal interference, reversibility, and integrity. The stiffness adjustment device in this embodiment is used to adjust the initial stiffness of the friction damper. The amplification coefficient adjustment device amplifies the small vibrations generated at the beam-column joint, thereby enabling the damper to enter the energy dissipation stage earlier and transmitting the energy to the bearing capacity adjustment device and the stiffness adjustment device. This achieves high energy dissipation efficiency of the damper and realizes the functions of damper stiffness adjustment and support reinforcement.

[0028] In a specific example, the load-bearing capacity adjustment device 21 includes a secondary plate 2101, a main plate 2102, a high-strength bolt 2105, a connecting ear plate 2106, a pin 2107, and a nut a2109. The secondary plate 2102 consists of two pieces. One end of the two secondary plates 2102 is rotatably connected to the connection point of the wooden beam-column node 1 by the pin 2107 and the connecting ear plate 2106. The other end is clamped to the main plate 2102 by the high-strength bolt 2105 and the nut a2109. The high-strength bolt 2105 passes through the sliding hole 21021 on the main plate 2102.

[0029] In this embodiment, the preload bearing capacity between the main board and the sub-board can be adjusted by high-strength bolts. When the bearing capacity adjustment device is subjected to a load exceeding the preload bearing capacity, the main board and the sub-board slide relative to each other through the bolt-fitted sliding hole, and begin to consume energy through friction.

[0030] In a specific example, it also includes an elastic washer 2108, and there are four high-strength bolts 2105 and nuts a2109. The main board 2102 is clamped between the high-strength bolts 2105 and nuts a2109 by the elastic washer 2108.

[0031] In this embodiment, a preload is applied by an elastic washer and nut a. Multiple high-strength bolts and nuts a, together with the elastic washer, can increase the preload. When the external force exceeds the preload, the main board begins to slide and consume energy.

[0032] In a specific example, it also includes a connecting plate 2103 and stiffening ribs 2104. The upper end of the connecting plate 2103 is welded to the main board 2102, and a plurality of stiffening ribs 2104 are provided between the upper end of the connecting plate 2103 and the main board 2102.

[0033] This embodiment uses stiffening ribs to increase the rigidity of the main board and prevent damage at the welding positions.

[0034] In a specific example, the stiffness adjustment device 22 includes a screw 2201, a disc spring a2202, a disc spring b2203, and a nut b2204. The lower end of the connecting plate 2103 is connected to the screw 2201 through and slidably. The disc spring a2202 is slidably sleeved on the screw 2201 located inside the connecting plate 2103, and the disc spring b2203 is slidably sleeved on the screw 2201 located outside the connecting plate 2103. The upper end of the disc spring a2202 and the lower end of the disc spring b2203 are both adjusted and limited by the nut b2204.

[0035] In this embodiment, the initial stiffness of the energy-consuming device can be set by adjusting the nut b at the upper end of disc spring a and the lower end of disc spring b.

[0036] Additionally, it should be noted that in this embodiment, the stretching and compression of disc springs a and b can both drive the connecting plate to move. However, the main board provides preload through high-strength bolts. Therefore, only when the external force exceeds the preload will the connecting plate drive the main board to move along the sliding hole and begin to dissipate energy through friction.

[0037] In a specific example, the amplification factor adjustment device 23 includes a hinge support 2301, which is installed at the end of the screw 2201 by a nut. Both ends of the hinge support 2301 are rotatably connected to connecting rods a2302 by screw shafts 2307. Connecting rods a2302 are adjustablely connected to connecting rods b2303. Connecting rods b2303 are adjustablely connected to positioning adjustment steel plates 2304, which are installed on beam 11 or column 12.

[0038] In this embodiment, since the connecting rods a and b, as well as the connecting rod b and the positioning adjustment steel plate, are adjustable, the length and angle of the supporting arm formed can be adjusted. Therefore, the deformation of the beam and column can be amplified, and the energy consumption efficiency of the energy consumer can be improved while ensuring the supporting function.

[0039] In a specific example, the connecting ends of the connecting rod a2302 and the connecting rod b2303 are provided with a plurality of bolt holes along the length direction, and the connecting rod a2302 and the connecting rod b2303 are connected and fixed by connecting bolt a2305 through the bolt holes.

[0040] In this embodiment, the connection length between connecting rods can be adjusted by matching the corresponding bolt holes and connecting bolts a according to the actual situation of the beam-column joint.

[0041] In a specific example, the positioning and adjusting steel plate 2304 is provided with a plurality of bolt holes, and one end of the connecting rod b2303 is connected to the positioning and adjusting steel plate 2304 through the connecting bolt b2306 and the corresponding bolt holes.

[0042] In this embodiment, the connection angle of the connecting rod can be adjusted by matching the corresponding bolt holes and connecting bolts b according to the actual situation of the beam-column joint.

[0043] It should be noted that the connection angle and length adjustment of the connecting rod in this embodiment can be matched with the position of the hinge support on the screw.

[0044] In a specific example, the system also includes a node outer steel 3, which is installed at the connection of the timber structure beam-column node 1, and the positioning and adjusting steel plate 2304 is installed on the node outer steel 3.

[0045] Since the research object of this embodiment is the beam-column joint of a wooden structure, the beam-column joint is wrapped with steel to make the connection of the device more stable.

[0046] The working principle of this embodiment is as follows: Under normal operating load, adjusting the position of nut b can adjust the stiffness of disc springs a and b, thereby changing the initial stiffness of the energy dissipation device. When the beam-column joint is subjected to external forces such as earthquakes, vibration is generated. The displacement amplitude generated by this vibration is amplified through connecting rods a and b, causing disc springs a2202 and b2203 to deform. As the spring deformation increases, the force increases. When the external force exceeds the initial preload generated by the high-strength bolt, relative sliding occurs between the main plate and the sub-plate, initiating frictional energy dissipation.

[0047] In summary, the multifunctional adjustable energy dissipator of this invention not only provides support and reinforcement for beam-column structures to a certain extent, but also exhibits significant vibration damping and energy dissipation effects on timber beam-column joints. Multiple devices can be arranged in different directions at the same joint to dampen and dissipate energy in different directions. By adjusting the installation and connection positions of the connecting rod and positioning adjustment steel plate, beam-column joints of different sizes and arrangements can be installed. Adjusting the initial stiffness of the disc spring makes it suitable for beam-column joints with different stiffnesses. Adjusting the preload of the high-strength bolts can control the friction energy dissipation effect. The structure is compact and robust, with reliable connection between the steel plate outer casing and the bolts to the main structure. It can be reused repeatedly, and when the friction damper needs to be disassembled, it can be disassembled using bolts and pins.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures, characterized in that, The system includes a friction damper (2), which comprises a load-bearing capacity adjustment device (21), a stiffness adjustment device (22), and an amplification factor adjustment device (23). One end of the load-bearing capacity adjustment device (21) is rotatably mounted at the connection of the timber beam-column node (1), and the other end is connected to the amplification factor adjustment device (23) via the stiffness adjustment device (22). The two ends of the amplification factor adjustment device (23) are rotatably connected to the beam (11) and column (12) of the timber beam-column node (1), respectively. The load-bearing capacity adjustment device (21) includes a sub-plate (2101), a main plate (2102), a high-strength bolt (2105), a connecting ear plate (2106), a pin (2107), and a nut a (2109). The sub-plate (2102) consists of two pieces. One end of the two sub-plates (2102) is rotatably connected to the connection point of the wooden beam-column node (1) through the pin (2107) and the connecting ear plate (2106). The other end is clamped to the main plate through the high-strength bolt (2105) and the nut a (2109). (2102), the high-strength bolt (2105) passes through the sliding hole (21021) on the main board (2102), and also includes a connecting plate (2103) and stiffening ribs (2104). The upper end of the connecting plate (2103) is welded to the main board (2102), and several stiffening ribs (2104) are provided between the upper end of the connecting plate (2103) and the main board (2102). The stiffness adjustment device (22) includes a screw (2201), a disc spring a (2202), and a disc spring b (2203). The lower end of the connecting plate (2103) is connected to a screw (2201) through and slidably. A disc spring a (2202) is slidably sleeved on the screw (2201) inside the connecting plate (2103), and a disc spring b (2203) is slidably sleeved on the screw (2201) outside the connecting plate (2103). The upper end of the disc spring a (2202) and the lower end of the disc spring b (2203) are both adjusted and limited by the nut b (2204).

2. The multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures according to claim 1, characterized in that, It also includes an elastic washer (2108), and there are four high-strength bolts (2105) and four nuts a (2109). The high-strength bolts (2105) and nuts a (2109) are clamped between the main board (2102) by the elastic washer (2108).

3. The multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures according to claim 1, characterized in that, The amplification factor adjustment device (23) includes a hinge support (2301), which is installed at the end of the screw (2201) by adjusting the nut. The two ends of the hinge support (2301) are respectively rotatably connected to the connecting rod a (2302) by the screw shaft (2307). The connecting rod a (2302) is adjustablely connected to the connecting rod b (2303), and the connecting rod b (2303) is adjustablely connected to the positioning adjustment steel plate (2304). The positioning adjustment steel plate (2304) is installed on the beam (11) or the column (12).

4. The multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures according to claim 3, characterized in that, The connecting ends of the connecting rod a (2302) and the connecting rod b (2303) are provided with a plurality of bolt holes along the length direction. The connecting rod a (2302) and the connecting rod b (2303) are connected and fixed by connecting bolt a (2305) through the bolt holes.

5. The multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures according to claim 3, characterized in that, The positioning and adjusting steel plate (2304) is provided with several bolt holes, and one end of the connecting rod b (2303) is connected to the positioning and adjusting steel plate (2304) through the connecting bolt b (2306) and the corresponding bolt hole.

6. The multifunctional adjustable energy dissipator for reinforcing beam-column joints in timber structures according to claim 3, characterized in that, It also includes node outer steel (3), which is installed at the connection of the timber structure beam-column node (1), and the positioning adjustment steel plate (2304) is installed on the node outer steel (3).

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