A self-centering buckling-restrained brace based on disc spring reset and slope core plate energy dissipation

Abstract

The application relates to a self-resetting buckling restrained brace based on disc spring resetting and slope core plate energy dissipation, which comprises a shell, a slope core plate, a fixed restraint cover plate assembly, disc springs and a movable restraint cover plate assembly; the upper surface and the lower surface of the slope core plate are uniformly arranged with the movable restraint cover plate assembly, the inner side of the end part of the movable restraint cover plate assembly relative to the slope core plate is provided with a movable cover plate self-resetting slope, the movable cover plate self-resetting slope is matched and contacted with the core plate slope protrusion on the same side; the outer side of the end part of the movable restraint cover plate assembly relative to the slope core plate is provided with a plurality of disc springs; the fixed restraint cover plate assembly is installed between the core plate energy dissipation section and the movable restraint cover plate assembly on the upper surface or the lower surface of the slope core plate, the fixed restraint cover plate assembly is fixed with the shell covered outside the whole structure through a plurality of fixed cover plate bolts penetrating the movable restraint cover plate assembly on the same side. The application simplifies the structure and can automatically restore to the initial state after plastic deformation under external force.

Description

Technical Field

[0001] This invention relates to a self-resetting buckling restraint brace based on disc spring reset and slope core plate energy dissipation, belonging to the technical field of earthquake-resistant and disaster-prevention devices. Background Technology

[0002] Buckling-restrained braces (BRBs) allow their core panels to undergo plastic deformation under earthquakes and other loads, dissipating seismic energy and reducing the seismic load on the main structure. However, once the core panel of a BRB undergoes plastic deformation, it often cannot return to its initial state. This results in residual deformation in the main structure after an earthquake, which not only reduces the safety and reliability of the structure but also significantly increases the difficulty of repair, causing substantial property damage.

[0003] To address the problems with buckling restraint braces, various buckling restraint braces with self-resetting functions have been developed both domestically and internationally. However, the reset mechanism of existing self-resetting buckling restraint braces is separated from the energy dissipation structure, which not only makes the device cumbersome, but also often generates large pre-compression or pre-tension stress on the energy dissipation component, affecting the performance of the energy dissipation component. Summary of the Invention

[0004] This invention provides a self-resetting buckling restraint brace based on disc spring reset and slope core plate energy dissipation, which simplifies the construction and has the ability to recover to the initial state after plastic deformation under seismic loading.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A self-resetting buckling restraint brace based on disc spring reset and slope core plate energy dissipation includes a shell, a slope core plate as an energy dissipation component, a fixed restraint cover plate assembly as a buckling restraint component, a disc spring, and a movable restraint cover plate assembly as a self-resetting component.

[0007] The slope core board includes a core board energy dissipation section and a core board clamping section. The two ends of the core board energy dissipation section have core board slope protrusions, which are seamlessly connected to the core board clamping section. That is, the core board energy dissipation section, the core board slope protrusions and the core board clamping section are integrated into one unit.

[0008] Movable constraint cover plate assemblies are arranged on both the upper and lower surfaces of the slope core plate. The inner side of the end of the movable constraint cover plate assembly relative to the core plate is provided with a movable cover plate self-resetting slope surface. The movable cover plate self-resetting slope surface matches and contacts the protrusion of the core plate slope surface on the same side.

[0009] Several disc springs are pre-set on the outer side of the end of the active constraint cover plate assembly relative to the slope core plate;

[0010] On the upper or lower surface of the slope core plate, a fixed constraint cover plate assembly is installed between the energy-consuming section of the core plate and the movable constraint cover plate assembly. The fixed constraint cover plate assembly is fixed to the outer shell after passing through the movable constraint cover plate assembly on the same side by several fixed cover plate bolts. The two ends of the disc spring abut against the outer shell and the movable constraint cover plate assembly respectively. The movable cover plate bolt passes through the movable hole of the outer shell and the center hole of the disc spring and is fixed to the movable constraint cover plate.

[0011] As a further preferred embodiment of the present invention, the movable constraint cover plate assembly includes a movable cover plate connecting panel, a movable cover plate movable hole, and a movable cover plate self-resetting slope. The surface of the movable cover plate connecting panel opposite to the core plate is defined as the lower surface. Movable cover plate self-resetting slopes are respectively provided at both ends of the lower surface of the movable cover plate connecting panel. After the movable cover plate self-resetting slope contacts the protrusion of the core plate slope at the adjacent end, it cooperates to realize the conversion of axial force and vertical force.

[0012] As a further preferred embodiment of the present invention, a plurality of evenly distributed movable cover plate holes are pre-drilled on the movable cover plate connecting panel, and a plurality of pre-drilled bolt holes are arranged on the upper surface of the self-resetting slope surface of the movable cover plate at each end of the movable cover plate connecting panel, the bolt holes having internal threads; the number of pre-drilled bolt holes matches the number of disc springs.

[0013] The outer shell is a rectangular tube with open ends. When the outer shell covers the entire structure, a matching number of outer shell fixing holes are opened at the positions of the movable holes of the movable cover plate, and a matching number of outer shell movable holes are opened at the positions of the bolts of the movable cover plate.

[0014] As a further preferred embodiment of the present invention, the fixed constraint cover plate assembly includes a fixed cover plate constraint panel, on which a plurality of evenly distributed fixed cover plate round steel pipe sleeves are installed. The number of fixed cover plate round steel pipe sleeves is the same as the number of movable holes of the movable cover plate, and their arrangement positions are matched. The fixed cover plate bolts and the fixed cover plate round steel pipe sleeves pass through the movable holes of the movable cover plate during installation.

[0015] The fixed cover plate round steel tube sleeve has internal threads, and its model corresponds to the fixed cover plate bolts; the outer diameter of the fixed cover plate round steel tube sleeve is smaller than the movable hole of the movable cover plate, but larger than the fixing hole of the outer shell; the fixed cover plate round steel tube sleeve is welded to the fixed cover plate constraint panel.

[0016] The fixed cover plate bolts are screwed into the fixed cover plate round steel tube sleeve from the fixed hole of the outer shell, and the movable cover plate bolts are screwed into the reserved bolt holes through the disc spring from the movable hole of the outer shell. The fixed cover plate bolts and the movable cover plate bolts work together to constrain the movement direction of the movable cover plate connecting panel.

[0017] As a further preferred embodiment of the present invention, the core plate clamping sections at both ends of the slope core plate extend from the opening end of the outer shell, and the core plate clamping sections serve as the installation and connection parts of the entire structure and the main structure.

[0018] By employing the above technical solutions, the present invention has the following beneficial effects compared to the prior art:

[0019] 1. The self-resetting buckling restraint brace based on disc spring reset and slope core plate energy dissipation provided by the present invention has a linkage relationship between the slope core plate as an energy dissipation component and the movable restraint cover plate assembly as a self-resetting component through the slope protrusion. The device has a simple structure, simplifies the structural adjustment process, and reduces the complexity of design and construction.

[0020] 2. The self-resetting buckling constraint support based on disc spring reset and sloped core plate energy dissipation provided by this invention, as a movable constraint cover plate assembly of the self-resetting member, can convert deformation tensile or compressive forces into axial and vertical forces when plastic deformation occurs. That is, the self-resetting member has the ability to restore the energy-dissipating member to its initial state. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of a self-resetting buckling restraint support according to a preferred embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the core board structure according to a preferred embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the shell structure of a preferred embodiment provided by the present invention;

[0025] Figure 4 This is a structural schematic diagram of the fixed constraint cover plate assembly according to a preferred embodiment of the present invention;

[0026] Figure 5 This is a structural schematic diagram of the active constraint cover plate assembly according to a preferred embodiment of the present invention.

[0027] In the diagram: 1 is the sloping core plate, 1.1 is the sloping protrusion of the core plate, 1.2 is the energy-consuming section of the core plate, 1.3 is the clamping section of the core plate, 2 is the outer shell, 2.1 is the movable hole of the outer shell, 2.2 is the fixing hole of the outer shell, 3 is the fixed constraint cover plate assembly, 3.1 is the fixed cover plate constraint panel, 3.2 is the fixed cover plate round steel tube sleeve, 3.3 is the fixed cover plate bolt, 4 is the movable constraint cover plate assembly, 4.1 is the movable cover plate connecting panel, 4.2 is the movable cover plate self-resetting slope, 4.3 is the movable cover plate bolt, 4.4 is the movable hole of the movable cover plate, and 5 is the disc spring. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of this application, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

[0029] Existing technologies for self-resetting buckling-restrained braces typically separate the reset mechanism from the energy dissipation mechanism, resulting in a cumbersome overall brace structure. The reset mechanism generates significant pre-compressive or pre-tensile stresses on the energy dissipation components, which not only affects the performance of the energy dissipation components but also presents the problem of not being able to automatically return to the initial state.

[0030] To overcome the above problems, this application provides a self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation, such as... Figure 1 As shown, it includes an outer shell 2, a sloped core plate 1 as an energy dissipation component, a fixed constraint cover plate assembly 3 as a buckling constraint component, a disc spring 5, and a movable constraint cover plate assembly 4 as a self-resetting component. As can be seen from the schematic diagram, the energy dissipation component and the self-resetting component are related components. In principle, the two cooperate with each other to convert the pressure or tension generated by the reset component on the energy dissipation component into axial pressure or axial compression, so as to minimize the impact on the performance of the energy dissipation component, and at the same time realize the purpose of the self-resetting buckling constraint support to automatically return to the initial state after plastic deformation.

[0031] Specifically, the slope core board includes the core board energy dissipation section 1.2 and the core board clamping section 1.3, such as... Figure 2 As shown, the core plate energy-dissipating section has core plate slope protrusions 1.1 at both ends, which are seamlessly connected to the core plate clamping section. That is, the core plate energy-dissipating section, the core plate slope protrusions, and the core plate clamping section are integral structures of hot rolling or forging, without any weld seams in the middle; movable constraint cover plate assemblies are arranged on both the upper and lower surfaces of the core plate. Figure 5 As shown, the movable constraint cover plate assembly includes a movable cover plate connecting panel 4.1, a movable cover plate movable hole 4.4, and a movable cover plate self-resetting slope 4.2. The surface of the movable cover plate connecting panel opposite to the core plate is defined as the lower surface. Movable cover plate self-resetting slopes are respectively provided at both ends of the lower surface of the movable cover plate connecting panel. After the movable cover plate self-resetting slope contacts the protrusion of the slope of the core plate at the adjacent end, it cooperates to realize the conversion of axial force and vertical force.

[0032] A fixed constraint cover plate assembly is installed between the energy-dissipating section of the core plate and the movable constraint cover plate assembly on the upper or lower surface of the slope core plate. Figure 4 As shown, the fixed constraint cover plate assembly includes a fixed cover plate constraint panel 3.1. The fixed constraint cover plate assembly is fixed to the outer shell covering the entire structure after passing through the movable constraint cover plate assembly on the same side by several fixed cover plate bolts 3.3. Several disc springs are preset on the outer side of the end of the movable constraint cover plate assembly relative to the core plate. The two ends of the disc springs abut against the outer shell and the movable constraint cover plate assembly, respectively. The movable cover plate bolts 4.3 pass through the movable hole 2.1 of the outer shell and the center hole of the disc springs and are fixed to the movable constraint cover plate.

[0033] The connection and assembly between the slope core plate, the fixed constraint cover plate assembly, and the movable constraint cover plate assembly specifically involves pre-drilling several evenly distributed movable cover plate holes on the movable cover plate connecting panel, and pre-drilling several bolt holes on the self-resetting slope surface of the movable cover plate at each end of the movable cover plate connecting panel; the number of pre-drilled bolt holes matches the number of disc springs; for example, here... Figure 3 As shown, the outer shell is a rectangular tube with open ends. The core plate clamping sections at both ends of the sloping core plate extend from the open ends of the outer shell, serving as the connection point for the entire structure and the main structure. When the outer shell covers the entire structure, a matching number of outer shell fixing holes 2.2 are made at the positions of the movable holes of the movable cover plate, and a matching number of outer shell movable holes are made at the positions of the movable cover plate bolts.

[0034] Several evenly distributed fixed cover plate round steel tube sleeves are installed on the fixed cover plate constraint panel. The fixed cover plate round steel tube sleeves 3.2 have internal threads. The number of fixed cover plate round steel tube sleeves is the same as the number of movable holes of the movable cover plate, and their arrangement positions are matched. The fixed cover plate round steel tube sleeves pass through the movable holes of the movable cover plate during installation. The fixed cover plate bolts are screwed into the fixed cover plate round steel tube sleeves from the fixed holes of the outer shell, and the movable cover plate bolts pass through the disc springs from the movable holes of the outer shell and are screwed into the reserved bolt holes. The fixed cover plate bolts and the movable cover plate bolts work together to constrain the movement direction of the movable cover plate connecting panel.

[0035] In the preferred embodiments provided in this application, from Figures 1-5 The movable cover has five movable holes, which are evenly distributed on the movable cover connecting panel; five bolt holes are set for the fixed cover; four disc springs are set, which are respectively sleeved on the four movable cover bolts, and the four disc springs are arranged in a square structure.

[0036] The aforementioned self-resetting buckling restraint support achieves its desired effect based on its deformation principle. When subjected to tension, the slope core plate undergoes plastic deformation to dissipate energy. The length of the energy-dissipating section of the core plate increases after being stretched, and the protrusions on the slope of the core plate, due to outward displacement, push the recessed position of the self-resetting slope of the movable cover plate to both sides, causing the entire movable restraint cover plate assembly to push and open to both sides. At this time, the fixed cover plate restraint panel only plays a fixing and connecting role. The fixed cover plate always ensures the restraint of the energy-dissipating section of the core plate, while the fixed cover plate round steel pipe sleeve provides displacement restraint for the movable restraint cover plate assembly in all directions except the axial direction of the fixed cover plate round steel pipe sleeve, preventing the movable cover plate connecting panel from displacing in other directions. As the movable constraint cover assembly expands outward while the outer shell remains fixed, the gap between the movable constraint cover assembly and the outer shell decreases. The movable hole in the outer shell restricts the displacement direction of the movable cover bolts of the movable constraint cover assembly, allowing it to expand outward only, and the disc spring is compressed and stores energy. When the external force disappears, the disc spring, due to compression, generates pressure on the movable constraint cover assembly, causing the movable constraint cover assembly to displace downward. At this time, the self-resetting slope of the movable cover generates pressure on the protruding slope of the core plate. Through the transmission of the slope, axial pressure is generated on the core plate, forcing the energy dissipation section of the core plate to retract to its initial length. At this time, the fixed cover constraint panel will still constrain the core plate.

[0037] When the self-resetting buckling restraint brace is under pressure, the core plate undergoes compressive plastic deformation, dissipating energy. The length of the energy-dissipating section of the core plate shortens, causing the protrusions on the core plate's slope to shift inwards, pushing the recessed position of the self-resetting slope of the movable cover plate to both sides. This, in turn, causes the movable restraint cover plate assembly to open to both sides. At this time, the fixed cover plate restraint panel serves to fix, connect, and constrain the buckling of the energy-dissipating section of the core plate. The movable restraint cover plate assembly expands outwards, and the disc spring is compressed and stores energy. When the external force disappears, the disc spring generates inward pressure on the movable restraint cover plate assembly, causing it to shift downwards. Since the direction of the self-resetting slope of the movable cover plate is opposite to that during tension, it generates axial tension on the core plate, forcing the energy-dissipating section of the core plate to return to its original length, thus achieving the self-resetting function of the core plate.

[0038] Finally, this application also provides the installation process of the aforementioned self-resetting buckling restraint brace. First, the fixed cover plate round steel tube sleeve of the fixed cover plate restraint panel is passed through the movable cover plate movable hole sleeve; then, the groove of the self-resetting slope of the movable cover plate is overlapped with the protrusion of the core plate slope, and the relative positions of the fixed cover plate restraint panel and the slope core plate energy dissipation section are formed, ultimately forming an integral assembly of the movable restraint cover plate assembly and the fixed restraint cover plate assembly clamping the slope core plate; this integral assembly is passed through the outer shell, ensuring that the energy dissipation section and slope section of the slope core plate, the fixed restraint cover plate assembly, and the movable restraint cover plate assembly are completely enclosed by the outer shell, while the core plate clamping section is exposed, facilitating subsequent connection with the main structure; at this time, the five fixed cover plate round steel tube sleeves are aligned with the five outer shell fixing holes on the outer shell; then, the fixed cover plate screws are tightened... The bolt passes through the outer casing fixing hole from the outside of the casing and is screwed into the thread in the round steel tube sleeve of the fixing cover plate to fix the fixing cover plate constraint panel to the casing. At this time, the fixing constraint cover plate assembly should be fixed, and the movable cover plate connecting panel can slide up and down along the round steel tube sleeve of the fixing cover plate. Then, insert the disc spring into the gap between the movable cover plate connecting panel and the casing, and ensure that the center hole of the disc spring, the reserved bolt hole on the movable constraint cover plate assembly, and the casing fixing hole are concentric rings. Next, insert the movable cover plate bolt from the casing into the casing fixing hole and the center hole of the disc spring, and screw it into the reserved bolt hole on the self-resetting slope of the movable cover plate. At this time, the self-resetting buckling constraint support structure has been installed. Finally, fix the core plate clamping section to the main structure, and the overall installation is completed.

[0039] In summary, the self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation provided in this application has a simple structure and is easy to install. By designing a specific structure, it achieves the function of automatically restoring the buckling restraint brace to its initial state after plastic deformation under external force.

[0040] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0041] The meaning of "and / or" as used in this application includes situations where each exists alone or both exist simultaneously.

[0042] The term "connection" as used in this application can mean a direct connection between components or an indirect connection between components through other components.

[0043] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation, characterized in that: It includes an outer shell (2), a sloped core plate (1) as an energy dissipation component, a fixed constraint cover plate assembly (3) as a buckling constraint component, a disc spring (5), and a movable constraint cover plate assembly (4) as a self-resetting component. The slope core board (1) includes a core board energy dissipation section (1.2) and a core board clamping section (1.3). Both ends of the core board energy dissipation section (1.2) have core board slope protrusions (1.1) and are seamlessly connected to the core board clamping section (1.3). That is, the core board energy dissipation section (1.2), the core board slope protrusions (1.1) and the core board clamping section (1.3) are an integral structure. Movable constraint cover plate assemblies (4) are evenly distributed on the upper and lower surfaces of the slope core plate (1). The movable constraint cover plate assembly (4) is provided with a movable cover plate self-resetting slope surface (4.2) on the inner side of the end of the movable constraint cover plate assembly (4) relative to the slope core plate (1). When the movable constraint cover plate assembly (4) is placed on the upper or lower surface of the slope core plate (1), the movable cover plate self-resetting slope surface (4.2) is matched and contacted with the core plate slope protrusion (1.1) on the same side. Several disc springs (5) are pre-set on the outer side of the end of the active constraint cover plate assembly (4) relative to the slope core plate (1). On the upper or lower surface of the slope core plate (1), a fixed constraint cover plate assembly (3) is installed between the core plate energy dissipation section (1.2) and the movable constraint cover plate assembly (4). The fixed constraint cover plate assembly (3) is fixed to the outer shell (2) covering the entire structure after passing through the movable constraint cover plate assembly (4) on the same side by several fixed cover plate bolts (3.3). The two ends of the disc spring (5) abut against the outer shell (2) and the movable constraint cover plate assembly (4) respectively. The movable cover plate bolt passes through the movable hole of the outer shell and the center hole of the disc spring and is fixed to the movable constraint cover plate.

2. The self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation according to claim 1, characterized in that: The movable constraint cover plate assembly (4) includes a movable cover plate connecting panel (4.1), a movable cover plate movable hole (4.4), and a movable cover plate self-resetting slope (4.2). The surface of the movable cover plate connecting panel (4.1) opposite to the slope core plate (1) is defined as the lower surface. Movable cover plate self-resetting slopes (4.2) are respectively set at both ends of the lower surface of the movable cover plate connecting panel (4.1). After the movable cover plate self-resetting slope (4.2) contacts the core plate slope protrusion (1.1) at the adjacent end, it cooperates to realize the conversion of axial force and vertical force.

3. The self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation according to claim 2, characterized in that: Several evenly distributed movable cover holes (4.4) are reserved on the movable cover connecting panel (4.1), and several reserved bolt holes are arranged on the movable cover self-resetting slope (4.2) at each end of the movable cover connecting panel (4.1); the number of reserved bolt holes matches the number of disc springs (5); The outer shell (2) is a rectangular tube with open ends. When the outer shell (2) covers the outside of the entire structure, a number of matching outer shell fixing holes (2.2) are opened at the position of the movable hole (4.4) of the movable cover plate, and a number of matching outer shell movable holes (2.1) are opened at the position of the movable cover plate bolt.

4. The self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation according to claim 3, characterized in that: The fixed constraint cover plate assembly (3) includes a fixed cover plate constraint panel (3.1), on which a number of evenly distributed fixed cover plate bolts (3.3) and fixed cover plate round steel pipe sleeves (3.2) are installed. The number of fixed cover plate bolts (3.3) and fixed cover plate round steel pipe sleeves (3.2) is the same as the number of movable holes (4.4) of the movable cover plate, and their positions are matched. The fixed cover plate bolts (3.3) and fixed cover plate round steel pipe sleeves (3.2) pass through the movable holes (4.4) of the movable cover plate during installation. The fixed cover plate round steel tube sleeve (3.2) has internal threads, and its model corresponds to the fixed cover plate bolt (3.3); the outer diameter of the fixed cover plate round steel tube sleeve (3.2) is smaller than the movable hole (4.4) of the movable cover plate, but larger than the outer shell fixing hole (2.2); the fixed cover plate round steel tube sleeve (3.2) is welded to the fixed cover plate constraint panel (3.1).

5. The self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation according to claim 4, characterized in that: The fixed cover plate bolt (3.3) is screwed into the fixed cover plate round steel tube sleeve (3.2) through the outer shell fixing hole (2.2). The movable cover plate bolt (4.3) passes through the disc spring (5) through the outer shell movable hole (2.1) and is screwed into the reserved bolt hole. The fixed cover plate bolt (3.3) and the movable cover plate bolt (4.3) work together to constrain the movement direction of the movable cover plate connecting panel (4.1).

6. The self-resetting buckling restraint brace based on disc spring reset and sloped core plate energy dissipation according to claim 3, characterized in that: The core plate clamping sections (1.3) at both ends of the slope core plate (1) extend from the opening end of the outer shell (2), and the core plate clamping sections (1.3) serve as the installation and connection part of the entire structure and the main structure.

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