A tension-induced high-energy-consumption timber structure joint rotation self-resetting device

Abstract

The application provides a tension-excited high-energy-consumption wood structure node rotation self-resetting device, which comprises a first steel plate and a second steel plate installed on a wood component, a self-resetting assembly is arranged between the first steel plate and the second steel plate, the self-resetting assembly comprises a self-resetting pull rod and a energy-consuming connecting piece located on the side of the self-resetting pull rod and installed on the first steel plate and the second steel plate, the first steel plate and the second steel plate are connected through the self-resetting pull rod and the energy-consuming connecting piece, the two ends of the self-resetting pull rod pass through the first steel plate and the second steel plate respectively, and the self-resetting pull rod is a shape memory alloy self-resetting pull rod; the first steel plate and the second steel plate in the application can rotate with the rotation of the wood structure node, when the included angle between the first steel plate and the second steel plate becomes larger, the shape memory alloy self-resetting pull rod is pulled, so that the super-elastic behavior of the shape memory alloy is excited and the node is self-resetting.

Description

Technical Field

[0001] This invention relates to the field of civil engineering technology, and in particular to a self-resetting device for rotating nodes of high-energy-consuming wooden structures based on tension excitation. Background Technology

[0002] my country is vigorously promoting the development of modern multi-story timber structures. Engineered timber, such as glued laminated timber and cross-laminated timber, has been recognized and promoted in engineering projects due to its flexibility in design and processing, convenience in factory prefabrication and on-site installation, and diverse structural and component forms. However, in engineered timber structures, the joints at beam-column connections and beam-shear wall connections are similar to hinges, with low rotational stiffness. Therefore, under large loads or earthquakes, they are prone to significant rotational deformation, which can have a certain impact on buildings using timber structures.

[0003] Engineered timber structures often use bolted connections for joints, resulting in relatively low rotational stiffness. For example, in a glued laminated timber frame-orthogonal glued laminated timber shear wall structure, due to the difference in lateral stiffness between the frame and shear wall structures, the glued laminated timber beams at the connection with the orthogonal glued laminated timber shear wall will undergo in-plane rotation in the horizontal plane. Large rotation can lead to significant deformation or even failure of structural components such as floor slabs. Similarly, when beam-column joints in engineered timber structures rotate in the plane, the bolts rotate around the joint center. The timber at the bolt hole wall bears pressure, causing adjacent timber to experience transverse tensile stress, often resulting in transverse splitting of the timber in the joint area, leading to joint failure. Therefore, joint design is a crucial aspect of structural design. Seismic design requires strong joints and weak structural members. The design of engineered timber structure joints should ensure sufficient strength and deformation capacity to prevent deformation or failure beyond the intended use. Thus, it is necessary to develop self-resetting, high-energy-consuming, replaceable devices to improve the deformation capacity of joints and optimize the stress performance of engineered timber structures. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a high-energy-consuming wood structure node rotation self-resetting device based on tension excitation, which is used to solve the problem that nodes at wood structure connections and other locations have low rotational stiffness and poor deformation capacity in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides the following technical solution:

[0006] A high-energy-consuming wood structure node rotation self-resetting device based on tension excitation includes a first steel plate and a second steel plate installed on the wood component. A self-resetting assembly is provided between the first steel plate and the second steel plate. The self-resetting assembly includes a self-resetting tie rod installed on the first steel plate and the second steel plate and an energy-consuming connector located on the side of the self-resetting tie rod. The first steel plate and the second steel plate are connected by the self-resetting tie rod and the energy-consuming connector. The two ends of the self-resetting tie rod pass through the first steel plate and the second steel plate respectively, and the self-resetting tie rod is a shape memory alloy self-resetting tie rod.

[0007] In one embodiment of the present invention, the self-resetting device composed of the first steel plate and the second steel plate is applicable to two wooden components in a wooden structure that rotate in the horizontal plane. The self-resetting device is replaceable, and the wooden components include, but are not limited to, two mutually perpendicular wooden beams, mutually perpendicular wooden beams, and wooden walls.

[0008] In one embodiment of the present invention, the connection between the first steel plate and the second steel plate and the wooden component can be achieved by using bolts at the end of the wooden component or by wrapping the end of the wooden component with a steel plate pre-welded with bolts. The first steel plate is connected to the wooden component by a first bolt, and the second steel plate is connected to the wooden component by a second bolt. This technical solution allows the first steel plate to be installed on the wooden component by threading the first bolt through the first steel plate, thus facilitating the installation and removal of the first steel plate. Similarly, the second steel plate can be installed on the wooden component by threading the second bolt through the second steel plate, thus facilitating the installation and removal of the second steel plate.

[0009] In one embodiment of the present invention, a plurality of first pre-grooves are formed on the end of the first steel plate near the second steel plate, and a plurality of second pre-grooves are formed on the end of the second steel plate near the first steel plate.

[0010] In one embodiment of the present invention, the self-resetting pull rod includes a rod body and a first stop block and a second stop block respectively installed at the ends of the rod body. One end of the rod body passes through the first pre-cut groove and is connected to the first stop block, and the other end of the rod body passes through the second pre-cut groove and is connected to the second stop block. The self-resetting pull rod can slide along the first pre-cut groove in the first steel plate.

[0011] In one embodiment of the present invention, the type of the energy-consuming connector includes, but is not limited to, U-shaped and annular energy-consuming steel plates. The energy-consuming connector is located between the first steel plate and the second steel plate, and the energy-consuming connector is connected to the first steel plate and the second steel plate by a third bolt. This technical solution enables the energy-consuming connector to be installed on the first steel plate and the second steel plate by threading the third bolt through the energy-consuming connector to the first steel plate and the second steel plate respectively, thereby facilitating the installation and disassembly of the energy-consuming connector by the staff.

[0012] As described above, the high-energy-dissipating wood structure node rotation self-resetting device based on tension excitation of the present invention has the following beneficial effects: The first steel plate and the second steel plate in the present invention will rotate with the rotation of the wood structure node. When the included angle between the first steel plate and the second steel plate increases, it will pull the shape memory alloy self-resetting tie rod, thereby stimulating the hyperelastic behavior of the shape memory alloy and causing the node to self-reset. At the same time, the energy-dissipating connector between the first steel plate and the second steel plate will deform to achieve energy dissipation. Therefore, the present invention can achieve self-resetting and high energy dissipation after the wood structure has undergone large rotational deformation under large earthquakes or ultra-large loads, thereby preventing the wood structure building from undergoing deformation or damage beyond its service function, and thus improving the disadvantage of the generally low rotational stiffness of wood structure nodes. It will be particularly effective in improving the rotational stiffness of the node in the horizontal plane. Attached Figure Description

[0013] Figure 1 The diagram shown is an overall structural schematic of the high-energy-consuming wood structure node rotation self-resetting device based on tension excitation disclosed in an embodiment of the present invention.

[0014] Figure 2 The diagram shows the connection between the first steel plate and the second steel plate in the high-energy-consuming wood structure node rotation self-resetting device based on tension excitation disclosed in an embodiment of the present invention.

[0015] Figure 3 The diagram shows the overall structure of the high-energy-consuming wooden structure node rotation self-resetting device based on tension excitation, which is installed on two wooden beams, as disclosed in an embodiment of the present invention.

[0016] Figure 4 The diagram shown is a top view of the self-resetting device for rotating high-energy-consuming wooden structure nodes based on tension excitation, which is installed on two wooden beams, as disclosed in an embodiment of the present invention.

[0017] Figure 5 The diagram shows the overall structure of the high-energy-consuming wooden structure node rotation self-resetting device based on tension excitation disclosed in this embodiment of the invention, installed on a wooden beam and a wooden wall.

[0018] Figure 6 The diagram shown is a top view of the installation of the high-energy-consuming wooden structure node rotation self-resetting device based on tension excitation on the wooden beam and wooden wall, as disclosed in an embodiment of the present invention.

[0019] Component designation explanation

[0020] 1. Wooden components; 101. Wooden beam; 102. Wooden wall; 2. First steel plate; 3. Second steel plate; 4. Self-resetting assembly; 401. Self-resetting tie rod; 4011. Rod body; 4012. First stop block; 4013. Second stop block; 402. Energy-dissipating connector; 5. First bolt; 6. Second bolt; 7. First pre-grooved slot; 8. Second pre-grooved slot; 9. Third bolt. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features described herein can be combined with each other.

[0022] Please see Figure 1 and Figure 2 This invention provides a high-energy-consuming wooden structure node rotation self-resetting device based on tension-induced rotation, comprising a first steel plate 2 and a second steel plate 3 mounted on a wooden component 1. The self-resetting device composed of the first steel plate 2 and the second steel plate 3 is preferably applicable to two wooden components 1 in a wooden structure that undergo horizontal rotation. The wooden components 1 include, but are not limited to, two mutually perpendicular wooden beams 101, mutually perpendicular wooden beams 101, and a wooden wall 102. The self-resetting device is replaceable and is preferably arranged in pairs on both sides of the wooden components 1 that are prone to rotation. The first steel plate 2 is preferably arranged on the wooden beam 101, and the second steel plate 3 is preferably arranged on the wooden wall 102 or other wooden columns. The connection between the first steel plate 2 and the second steel plate 3 and the wooden component 1 can be achieved by using bolts at the end of the wooden component 1 or by wrapping the end of the wooden component 1 with a steel plate pre-welded with bolts. The first steel plate 2 is connected to the wooden component 1 by the first bolt 5. By threading the first bolt 5 through the first steel plate 2 to the wooden component 1, the first steel plate 2 can be installed on the wooden component 1, thus facilitating the installation and removal of the first steel plate 2. The second steel plate 3 is connected to the wooden component 1 by the second bolt 6. By threading the second bolt 6 through the second steel plate 3 to the wooden component 1, the second steel plate 3 can be installed on the wooden component 1, thus facilitating the installation and removal of the second steel plate 3.

[0023] A self-resetting assembly 4 is provided between the first steel plate 2 and the second steel plate 3. The self-resetting assembly 4 includes a self-resetting pull rod 401 installed on the first steel plate 2 and the second steel plate 3, and an energy-dissipating connector 402 located on the side of the self-resetting pull rod 401. The first steel plate 2 and the second steel plate 3 are connected by the self-resetting pull rod 401 and the energy-dissipating connector 402. The two ends of the self-resetting pull rod 401 pass through the first steel plate 2 and the second steel plate 3 respectively, and the self-resetting pull rod 401 is a shape memory alloy self-resetting pull rod 401. Several first pre-grooves 7 are opened on the end of the first steel plate 2 near the second steel plate 3, and several second pre-grooves 8 are opened on the end of the second steel plate 3 near the first steel plate 2. The self-resetting pull rod 401 includes a rod body 4011 and a first stop block 4012 and a second stop block 4013 respectively installed on the end of the rod body 4011. One end of the rod body 4011 passes through the first pre-grooves 7 and connects to the first stop block 4012. The other end of 011 passes through the second pre-cut slot 8 and connects to the second stop 4013. The self-resetting pull rod 401 can slide along the first pre-cut slot 7 in the first steel plate 2. The first pre-cut slot 7 is an elongated hole, which allows the self-resetting pull rod 401 to slide along the slot as it rotates. The second pre-cut slot 8 is a circular hole, which serves as a limit, allowing the self-resetting pull rod 401 to move up and down only along its own axis. The type of energy-consuming connector 402 includes, but is not limited to, U-shaped and annular energy-consuming steel plates. The energy-consuming connector 402 is located between the first steel plate 2 and the second steel plate 3, and the energy-consuming connector 402 is connected to the first steel plate 2 and the second steel plate 3 by a third bolt 9. By threading the third bolt 9 through the energy-consuming connector 402 to the first steel plate 2 and the second steel plate 3 respectively, the energy-consuming connector 402 can be installed on the first steel plate 2 and the second steel plate 3, thereby facilitating the installation and disassembly of the energy-consuming connector 402 by the staff.

[0024] Specifically, when the wooden structure node rotates, the first steel plate 2 and the second steel plate 3 will rotate along with the wooden structure node. When the included angle between the first steel plate 2 and the second steel plate 3 increases, it will pull the shape memory alloy self-resetting tie rod 401, thereby stimulating the hyperelastic behavior of the shape memory alloy and causing the node to self-reset. At the same time, the energy-dissipating connector 402 between the first steel plate 2 and the second steel plate 3 will deform to dissipate energy. Therefore, this self-resetting device can significantly improve the energy dissipation of the wooden structure node during rotation and its deformation self-resetting capability.

[0025] For practical applications, please refer to Figure 3 and Figure 4The self-resetting device is arranged between two mutually perpendicular wooden beams 101. The self-resetting device includes a first steel plate 2 and a second steel plate 3 on the wooden beams 101. The first steel plate 2 and the second steel plate 3 are fixed to the wooden beams 101 by bolts at the beam-column joints. The first steel plate 2 and the second steel plate 3 are connected by shape memory alloy self-resetting tie rods 401 and U-shaped energy-dissipating steel plates. The energy-dissipating connector 402 is fixed to the first steel plate 2 and the second steel plate 3 by bolts. The shape memory alloy self-resetting tie rods 401 are interconnected and pass through pre-cut slots on the second steel plate 3 and the first steel plate 2, and can slide along the pre-cut slots in the first steel plate 2 and the second steel plate 3. When the wooden structure joint rotates, the energy-dissipating connector 402 between the first steel plate 2 and the second steel plate 3 will deform to dissipate energy. When the angle between the first steel plate 2 and the second steel plate 3 increases during rotation, the shape memory alloy self-resetting tie rod 401 is stretched, thereby stimulating the hyperelastic behavior of the shape memory alloy and causing the joint to self-reset.

[0026] For another practical application, please refer to Figure 5 and Figure 6 The self-resetting device is arranged between mutually perpendicular wooden beams 101 and wooden walls 102. The self-resetting device includes a first steel plate 2 and a second steel plate 3 arranged on both sides of the wooden beams 101. The wooden walls 102 are covered with steel plates pre-welded with bolts. The first steel plate 2 is fixed to the wooden beams 101 by bolts at the joints, and the second steel plate 3 is fixed by bolts on the steel plate. The first steel plate 2 and the second steel plate 3 are connected by a shape memory alloy self-resetting tie rod 401 and an annular energy-dissipating steel plate. The energy-dissipating connector 402 is connected to the first steel plate 2 and the second steel plate 3 by bolts. The joint is fixed by bolt connection. Shape memory alloy self-resetting tie rods 401 are connected to each other. The self-resetting tie rods 401 pass through the pre-cut slots on the first steel plate 2 and the second steel plate 3 and can slide along the pre-cut slots in the first steel plate 2 and the second steel plate 3. When the wooden structure node rotates, the energy-dissipating connector 402 between the first steel plate 2 and the second steel plate 3 will deform to dissipate energy. When the angle between the first steel plate 2 and the second steel plate 3 increases during rotation, the shape memory alloy self-resetting tie rods 401 are stretched, thereby stimulating the hyperelastic behavior of the shape memory alloy and causing the node to self-reset.

[0027] In this invention, the first steel plate 2 and the second steel plate 3 rotate with the rotation of the wooden structure node. When the included angle between the first steel plate 2 and the second steel plate 3 increases, it pulls the shape memory alloy self-resetting tie rod 401, thereby stimulating the hyperelastic behavior of the shape memory alloy and causing the node to self-reset. At the same time, the energy-dissipating connector 402 between the first steel plate 2 and the second steel plate 3 will deform to dissipate energy. Therefore, this invention can achieve self-resetting and high energy dissipation after the wooden structure undergoes large rotational deformation under large earthquakes or ultra-large loads. This can prevent the wooden structure from deforming or being damaged beyond its functional use, thereby improving the generally low rotational stiffness of wooden structure nodes. It is particularly effective in improving the rotational stiffness of nodes in the horizontal plane.

[0028] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should still be covered by the claims of this invention.

Claims

1. A high-energy-consuming timber structure node rotation self-resetting device based on tension excitation, comprising a first steel plate (2) and a second steel plate (3) mounted on a timber component (1), characterized in that: The self-resetting device composed of the first steel plate (2) and the second steel plate (3) is suitable for two wooden components (1) that rotate in the horizontal plane in a wooden structure. The wooden component (1) includes two mutually perpendicular wooden beams (101), mutually perpendicular wooden beams (101) and a wooden wall (102). A self-resetting assembly (4) is provided between the first steel plate (2) and the second steel plate (3). The self-resetting assembly (4) includes a self-resetting pull rod (401) installed on the first steel plate (2) and the second steel plate (3) and an energy-dissipating connector (402) located on the side of the self-resetting pull rod (401). The first steel plate (2) and the second steel plate (3) are connected by the self-resetting pull rod (401) and the energy-dissipating connector (402). The two ends of the self-resetting pull rod (401) pass through the first steel plate (2) and the second steel plate (3) respectively, and the self-resetting pull rod (401) is a shape memory alloy self-resetting pull rod (401). The first steel plate (2) has several first pre-cut slots (7) on the end near the second steel plate (3), and the second steel plate (3) has several second pre-cut slots (8) on the end near the first steel plate (2). The self-resetting pull rod (401) includes a rod body (4011) and a first stop block (4012) and a second stop block (4013) respectively installed at the end of the rod body (4011). One end of the rod body (4011) passes through the first pre-cut slot (7) and is connected to the first stop block (4012). The other end of the rod body (4011) passes through the second pre-cut slot (8) and is connected to the second stop block (4013). The self-resetting pull rod (401) can slide along the first pre-cut slot (7) in the first steel plate (2).

2. The self-resetting device for high-energy-consuming wooden structure node rotation based on tension excitation according to claim 1, characterized in that: The connection between the first steel plate (2) and the second steel plate (3) and the wooden component (1) is achieved by bolts at the end of the wooden component (1) or by wrapping the end of the wooden component (1) with a steel plate pre-welded with bolts. The first steel plate (2) is connected to the wooden component (1) by a first bolt (5), and the second steel plate (3) is connected to the other wooden component (1) by a second bolt (6).

3. The self-resetting device for high-energy-consuming wooden structure node rotation based on tension excitation according to claim 1, characterized in that: The energy-consuming connector (402) includes U-shaped and annular energy-consuming steel plates. The energy-consuming connector (402) is located between the first steel plate (2) and the second steel plate (3), and the energy-consuming connector (402) is connected to the first steel plate (2) and the second steel plate (3) respectively by a third bolt (9).

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