A functionally separated self-centering dual-stage energy dissipation brace

Abstract

The application belongs to the technical field of structure engineering and discloses a function-separated self-resetting double-stage energy dissipation support, and the technical scheme is as follows: the function-separated self-resetting double-stage energy dissipation support comprises a triangular support, two groups of pre-pressing disc spring reset systems, two groups of double-stage energy dissipation systems and a pin shaft support; the triangular support is located between an upper frame beam and a lower frame beam, and the triangular support comprises a vertical section at the top, two inclined supports at the two sides and a horizontal beam at the bottom; the vertical section is hinged to the upper frame beam; the center of the horizontal beam is connected to the lower frame beam by using the pin shaft support; the pre-pressing disc spring reset system is arranged at the intersection of the horizontal beam and the inclined support; the end of the horizontal beam is connected to the lower frame beam by using the pre-pressing disc spring reset system; the double-stage energy dissipation system is arranged between the pin shaft support and the pre-pressing disc spring reset system and is close to the pre-pressing disc spring reset system; and the double-stage energy dissipation system connects the beam body of the horizontal beam and the lower frame beam. The function-separated self-resetting double-stage energy dissipation support solves the problems of invisible damage and single energy dissipation of the energy dissipation system in the prior art, and is convenient for daily maintenance and repair and rapid replacement after the earthquake.

Description

Technical Field

[0001] This invention belongs to the field of structural engineering technology, specifically relating to a functionally separated self-resetting two-stage energy dissipation support. Background Technology

[0002] With the advent of resilient cities, the concept of self-resetting has gained widespread attention, and self-resetting structures have been applied and promoted in practical civil engineering construction. Self-resetting braces typically combine prestressed resetting and energy dissipation systems, aiming to utilize the restoring force provided by prestress to return the structure to its initial position after an earthquake, effectively controlling residual deformation. However, existing self-resetting brace systems still have the following main limitations: 1. Functional limitations and insufficient adaptability: The energy dissipation mechanisms of most self-resetting braces, such as friction or metal yielding energy dissipation, have fixed activation thresholds and energy dissipation capabilities. Under frequent minor and moderate earthquakes, the brace may participate in energy dissipation prematurely or throughout the entire process, leading to unnecessary cumulative damage and shortening its service life; while under rare major earthquakes, a single resetting or energy dissipation system may cause the collapse of weak structural layers. This fixed design is difficult to adapt to the different levels of seismic fortification performance requirements of "no damage in minor earthquakes, repairable in moderate earthquakes, and no collapse in major earthquakes."

[0003] 2. Invisible Damage: Currently, most self-setting braces integrate the energy dissipation system and the self-setting system into a single, encapsulated component. Due to the randomness and complexity of earthquakes, after an actual earthquake, it is impossible to directly observe from the outside whether the energy dissipation components inside the brace, such as the core steel plate and friction plates, have entered the yielding stage or what the extent of their damage is. As a precaution, they must be removed and replaced. From a life-cycle perspective, this uncertainty poses a significant challenge to post-earthquake safety assessments, inspection decisions, and maintenance work.

[0004] 3. Poor Replaceability: Although the self-resetting function controls the deformation of the main structure, the energy dissipation system inside the support usually reaches the end of its service life or is damaged after a strong earthquake. Currently, most self-resetting supports are integrated into a single component, such as self-resetting buckling-restrained supports. The residual deformation after damage to the energy dissipation system makes on-site separation of the inner and outer cylinders extremely inconvenient. The highly integrated reset system limits the replacement of the energy dissipation system; the only solution is to first unload the prestress of the reset system. Removing the entire support from the structure and returning it to the factory for disassembly and repair makes rapid on-site replacement impossible, seriously affecting the rapid restoration of post-earthquake function and the efficiency of structural repair.

[0005] Therefore, it is necessary to provide a self-resetting two-stage energy dissipation support that is standardized and modularized in the factory to solve or improve the above-mentioned technical defects. Summary of the Invention

[0006] This invention provides a self-resetting dual-stage energy dissipation support with functional separation. Its purpose is to solve the problems of invisible damage and single energy consumption in the existing technology, while fully meeting the characteristics of prefabricated production and modular construction. At the same time, it facilitates daily maintenance and repair and rapid replacement after earthquakes.

[0007] The technical solution of this invention is as follows: a functionally separated self-resetting double-stage energy-dissipating support, comprising a triangular brace, two sets of pre-compressed disc spring reset systems, two sets of double-stage energy-dissipating systems, and a pin support; the triangular brace is located between the upper frame beam and the lower frame beam, and includes a vertical section at the top, diagonal braces on both sides, and a horizontal beam at the bottom. The vertical section is hinged to the upper frame beam, and the center of the horizontal beam is connected to the lower frame beam by a pin support; a pre-compressed disc spring reset system is provided at the intersection of the horizontal beam and the diagonal braces; the end of the horizontal beam is connected to the lower frame beam through the pre-compressed disc spring reset system; the double-stage energy-dissipating system is located between the pin support and the pre-compressed disc spring reset system, and is close to the pre-compressed disc spring reset system; the double-stage energy-dissipating system connects the beam body of the horizontal beam to the lower frame beam; the pre-compressed disc spring reset system and the double-stage energy-dissipating system are symmetrically arranged with the pin support as the symmetrical point.

[0008] Based on the above technical features: the preloaded disc spring reset system includes several high-strength lead screws, an upper fastening nut, a nut end plate, a disc spring assembly, two sets of knife-hing devices, a lower fastening nut, and a reset support; each knife-hing device includes a bottom convex plate and a knife-edge beam; the bottom convex plate and the knife-edge beam are stacked, one side of the bottom convex plate is flat, and the other side is provided with a protruding strip-shaped blade, which abuts against the reserved groove of the knife-edge beam; the upper and lower sets of knife-hing devices clamp the horizontal beam, and the flat surfaces of the two bottom convex plates are respectively close to the upper flange plate and the lower flange plate of the horizontal beam; a disc spring assembly is set on the upper knife-edge beam, and a nut end plate is set on the disc spring assembly; the high-strength lead screws are composed of... The high-strength screw rod passes through the nut end plate, disc spring assembly, upper blade hinge device, horizontal beam, and lower blade hinge device from top to bottom. The upper and lower fastening nuts fix the upper and lower ends of the high-strength screw rod, respectively. The length direction of the strip blade is consistent with the width direction of the horizontal beam. The reset support is provided with an upper toothed edge and a lower toothed edge. The horizontal beam is locked between the upper toothed edge and the lower toothed edge, and the upper and lower flange plates of the horizontal beam are flush with the upper and lower toothed edges, respectively. The upper blade hinge device rests on the upper toothed edge. The lower blade hinge device is locked below the lower toothed edge. The first bottom end plate of the reset support is fixed to the lower frame beam.

[0009] Based on the above technical features: the two-stage energy-consuming system includes an inner friction plate, two steel-seam-outer friction plates, a limiting bolt, and a preload bolt; the upper side of the inner friction plate is welded to the bottom of the horizontal beam along the beam's length, and the two steel-seam-outer friction plates clamp the inner friction plate from the front and back respectively; the inner friction plate is provided with vertical limiting elongated holes and vertical friction elongated holes, which are not on the same straight line and are staggered, with the length of the limiting elongated holes being less than the length of the friction elongated holes; the steel-seam-outer friction plate includes a steel seam, a first steel plate, and a second steel plate; the transverse steel seam connection... The first and second steel plates are located on both sides. A convex friction plate is installed on the first steel plate, and the contact surface between the convex friction plate and the inner friction plate dissipates energy through friction. A first opening corresponding to the center position of the elongated friction hole is reserved on the first steel plate, and a pre-tightening bolt passes through the first opening and the elongated friction hole to connect the inner friction plate and the two steel seam-outer friction plates. A second opening corresponding to the center position of the limiting elongated hole is reserved on the second steel plate; a limiting bolt passes through the second opening and the limiting elongated hole to connect the inner friction plate and the two steel seam-outer friction plates. The second bottom end plate of the first steel plate is fixed to the lower frame beam.

[0010] Based on the above technical features: the number of limit bolts is two or more, and two or more second openings and two or more limit oblong holes are provided accordingly.

[0011] Based on the above technical features: the steel seam is composed of multiple parallel and continuous narrow steel plate seams, and the end section of each narrow steel plate seam adopts a rounded transition.

[0012] Based on the above technical features: the pin support includes a lower ear plate, a pin, and an upper ear plate; the side of the upper ear plate is fixed below the horizontal beam, and the lower ear plate is fixed to the lower frame beam through the base plate, and the upper ear plate and the lower ear plate are connected by a pin.

[0013] The beneficial effects of this invention are as follows:

[0014] A functionally separated, self-resetting, two-stage energy-dissipating support utilizes the rotation of a triangular brace around a pivot pin to achieve parallel deformation of the preloaded disc spring reset system and the two-stage energy-dissipating system. Specifically, when the horizontal beam rotates around the pivot pin, all points on the horizontal beam rotate at the same angle, resulting in corresponding vertical deformations in both the preloaded disc spring reset system and the two-stage energy-dissipating system. From a stress analysis perspective, this solves the problem of invisible damage to existing energy-dissipating systems by separating the reset system and the energy-dissipating system, which deform in a correlated manner. It also overcomes the contradiction in existing systems where removing damaged energy-dissipating components requires prioritizing the removal of the reset component.

[0015] The dual-stage energy dissipation system achieves frictional energy dissipation throughout the entire process by opening two different lengths of elongated holes on the internal friction plate. The length of the limiting elongated holes is determined according to the performance-based design requirements of building seismic design, thus solving the problem of the single nature of existing energy dissipation systems.

[0016] The functionally separated, self-resetting, two-stage energy-dissipating brace utilizes factory-standardized triangular braces. Different floors require only different numbers, combinations, and specifications of disc springs, along with steel plates of varying seam specifications, to achieve varying stiffness and damping. All plastic and residual deformations in this functionally separated, self-resetting, two-stage energy-dissipating brace are concentrated at the two-stage energy-dissipating system. Furthermore, inspection and maintenance can be performed on the floor slab corresponding to the main frame beam, eliminating the need for ladders or other access equipment. This solves the technical problem of poor replaceability in existing braces, making replacing the energy-dissipating system as simple as replacing a battery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall framework of the present invention, taking a two-layer structure as an example.

[0018] Figure 2 This is a schematic diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the triangular support of the present invention.

[0020] Figure 4 This is a schematic diagram of the pin support of the present invention.

[0021] Figure 5 This is a schematic diagram of the preloaded disc spring reset system of the present invention.

[0022] Figure 6 This is a disassembly diagram of the preloaded disc spring reset system of the present invention.

[0023] Figure 7 This is a schematic diagram showing the connection between the preloaded disc spring reset system of the present invention and the horizontal beam.

[0024] Figure 8 This is a schematic diagram of the two-stage energy consumption system of the present invention.

[0025] Figure 9 This is a disassembly diagram of the two-stage energy consumption system of the present invention.

[0026] Figure 10 This is a schematic diagram of a modified version of the present invention.

[0027] Figure 11 This is a schematic diagram of a variation of the two-stage energy dissipation system of the present invention.

[0028] Figure 12 This is a force analysis diagram of the present invention.

[0029] Figure 13 This is a comparison chart of the bending moment and rotation angle curves of the existing single-stage self-resetting energy dissipation support and the bending moment and rotation angle curves of the self-resetting double-stage energy dissipation support of the present invention.

[0030] The component numbers in the diagram are:

[0031] 1—Triangular brace, 11—Vertical section, 12—Diagonal brace, 13—Horizontal beam, 14—Upper ear plate.

[0032] 2—Pin support, 201—Lower ear plate, 202—Pin.

[0033] 3—Preloaded disc spring reset system; 301—High-strength lead screw; 302—Upper fastening nut; 303—Nut end plate; 304—Disc spring assembly; 305—Knife-edge beam; 306—Bottom protrusion plate; 307—Lower fastening nut; 308—Reset support; 309—Upper toothed opening; 310—Lower toothed opening.

[0034] 4—Two-stage energy consumption system, 401—Inner friction plate, 402—Limit bolt, 403—Preload bolt, 404—Steel seam-outer friction plate, 405—Outer convex friction plate, 406—Steel seam, 407—Limit oblong hole, 408—Friction oblong hole, 409—First steel plate, 410—Second steel plate, 411—First opening, 412—Second opening. Detailed Implementation

[0035] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] In the description of this invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0037] like Figure 1 , Figure 2 As shown, the present invention provides a functionally separated self-resetting dual-stage energy-dissipating support, which specifically includes a triangular support 1, a pin support 2, two sets of pre-compressed disc spring reset systems 3, and two sets of dual-stage energy-dissipating systems 4.

[0038] like Figures 1 to 3 As shown, the triangular brace 1 is located between the upper and lower frame beams. The triangular brace 1 includes a vertical section 11 at the top, diagonal braces 12 on both sides, and a horizontal beam 13 at the bottom. The vertical section 11 is hinged to the upper frame beam, and this hinge can be achieved using existing hinge methods. The center of the horizontal beam 13 is connected to the lower frame beam by a pin support 2.

[0039] like Figure 1 and Figure 2As shown, a preloaded disc spring reset system 3 is installed at the intersection of the horizontal beam 13 and the diagonal brace 12; the end of the horizontal beam 13 is connected to the lower frame beam through the preloaded disc spring reset system 3; a two-stage energy dissipation system 4 is installed between the pin support 2 and the preloaded disc spring reset system 3, and is close to the preloaded disc spring reset system 3; the two-stage energy dissipation system 4 connects the beam body of the horizontal beam 13 to the lower frame beam. That is, the horizontal beam 13 is connected to the lower frame beam through one pin support 2, two sets of preloaded disc spring reset systems 3, and two sets of two-stage energy dissipation systems 4.

[0040] Two sets of preloaded disc spring reset systems 3 are symmetrically arranged with the pin support 2 as the symmetrical point; two sets of double-stage energy dissipation systems 4 are also symmetrically arranged with the pin support 2 as the symmetrical point; the preloaded disc spring reset system 3 on each side is set at the intersection of the horizontal beam 13 and the diagonal brace 12, and the double-stage energy dissipation system 4 is staggered next to the preloaded disc spring reset system 3 to ignore the reduction of the overall support stiffness by the additional bending moment and shear force, while allowing the axial force to dominate the control within the triangular brace 1 as much as possible.

[0041] like Figure 3 As shown, the specific components of the triangular brace 1 include a vertical section 11, two diagonal braces 12, and a horizontal beam 13, which are welded together.

[0042] like Figure 3 and Figure 4 As shown, the pin support 2 includes a lower ear plate 201, a pin 202, and an upper ear plate 14; the side of the upper ear plate 14 is fixed to the lower flange of the horizontal beam 13 at the mid-span, the lower ear plate 201 is fixed to the lower frame beam through the base plate, the upper ear plate 14 is vertically inserted into the lower ear plate 201, and the upper ear plate 14 and the lower ear plate 201 are connected by the pin 202.

[0043] like Figure 5 , Figure 6 and Figure 7 As shown, the preloaded disc spring reset system 3 includes several high-strength lead screws 301, upper fastening nuts 302, nut end plates 303, disc spring groups 304, two sets of knife-handle devices, lower fastening nuts 307, and reset supports 308.

[0044] Each blade hinge device includes a bottom convex plate 306 and a blade beam 305; the bottom convex plate 306 and the blade beam 305 are stacked together, one side of the bottom convex plate 306 is flat, and the other side is provided with a protruding strip-shaped blade that abuts against the reserved groove of the blade beam 305; the upper and lower sets of blade hinge devices clamp the horizontal beam 13, and the flat surfaces of the two bottom convex plates 306 are respectively attached to the upper flange plate and the lower flange plate of the horizontal beam 13; a disc spring assembly 304 is provided on the upper blade beam 305, and a nut end plate 303 is provided on the disc spring assembly 304; a high-strength screw 301 passes through the nut end plate 303, the disc spring assembly 304, the upper blade hinge device, the horizontal beam 13, and the lower blade hinge device from top to bottom, and the upper fastening nut 302 and the lower fastening nut 307 fix the upper end and the lower end of the high-strength screw 301 respectively.

[0045] The length of the strip-shaped cutting edge is aligned with the width of the horizontal beam 13. The blade hinge device achieves reciprocating displacement guidance and force transmission through the contact between the strip-shaped cutting edge and the reserved groove.

[0046] The reset support 308 is provided with an upper toothed opening 309 and a lower toothed opening 310. The horizontal beam 13 is wedged between the upper toothed opening 309 and the lower toothed opening 310, and the upper flange plate and the lower flange plate of the horizontal beam 13 are flush with the upper toothed opening 309 and the lower toothed opening 310, respectively. The upper knife hinge device is placed on the upper toothed opening 309. The lower knife hinge device is wedged below the lower toothed opening 310. The first bottom end plate of the reset support 308 is fixed to the lower frame beam.

[0047] The nut end plate 303, bottom protrusion plate 306, and knife-edge beam 305, as well as the horizontal beam 13, have corresponding holes where the high-strength lead screw 301 passes through. The diameter of each hole is slightly larger than the diameter of the high-strength lead screw 301. Similarly, the inner diameter of the disc spring assembly 304 must also be larger than the diameter of the high-strength lead screw 301 to ensure that the high-strength lead screw 301 does not undergo shearing damage to other components due to horizontal displacement when the knife-edge device rotates with the horizontal beam 13. The upper tooth 309 and lower tooth 310 of the reset support 308 are at the same height as the horizontal beam 13. The knife-edge device fits tightly against the upper and lower planes of the horizontal beam 13 to reduce the impact of machining errors on the initial stiffness of the support. The longitudinal spacing between a pair of reset supports 308 is slightly larger than the width of the horizontal beam 13 to ensure that the triangular brace 1 can reciprocate up and down within the gap between the pair of reset supports 308. The width of the upper hinge device is slightly larger than the longitudinal spacing between the upper teeth 309 of the pair of reset supports 308 to ensure that the upper hinge device can rest on the upper teeth 309 of the pair of reset supports 308. The hinge device should have sufficient rotational capacity in the rotation plane of the triangular brace 1 to meet the maximum inter-story drift angle requirement that the frame structure may have. The preload in the preloaded disc spring reset system 3 is applied by tightening the upper fastening nut 302 and the lower fastening nut 307.

[0048] like Figure 8, Figure 9 As shown, the dual-stage energy dissipation system 4 includes an inner friction plate 401, two steel seam-outer friction plates 404, a limiting bolt 402, and a preload bolt 403.

[0049] The upper side of the inner friction plate 401 is welded to the bottom of the horizontal beam 13, and two steel seam-outer friction plates 404 clamp the inner friction plate 401 from the front and back respectively; the inner friction plate 401 is provided with a vertical limiting elongated hole 407 and a vertical friction elongated hole 408, and the limiting elongated hole 407 and the friction elongated hole 408 are not arranged on the same straight line and are staggered.

[0050] The steel seam-external friction plate 404 includes a steel seam 406, a first steel plate 409, and a second steel plate 410; the transverse steel seam 406 connects the first steel plate 409 and the second steel plate 410 on both sides. A convex friction plate 405 is provided on the first steel plate 409, and the contact surface between the convex friction plate 405 and the inner friction plate 401 dissipates energy through friction.

[0051] Steel seam 406 is a series of parallel, continuous narrow seams in a steel plate. A series of parallel, continuous narrow seams can be created by cutting a steel plate. The two sides of the narrow seam can be retained to form the first steel plate 409 and the second steel plate 410.

[0052] The steel seam 406 is a weak point in the steel seam-outer friction plate 404 designed by the user. It consumes a huge amount of energy by utilizing the transition from elasticity to plasticity and the continuous plastic deformation process.

[0053] The first steel plate 409 has a pre-drilled hole 411 corresponding to the center position of the friction elongated hole 408. The pre-tightening bolt 403 passes through the first hole 411 and the friction elongated hole 408 to connect the inner friction plate 401 and the two steel seam-outer friction plates 404, and applies pre-tightening force. The second steel plate 410 has a pre-drilled hole 412 corresponding to the center position of the limiting elongated hole 407. The limiting bolt 402 passes through the second hole 412 and the limiting elongated hole 407 to connect the inner friction plate 401 and the two steel seam-outer friction plates 404. The limiting bolt 402 only needs to be tightened to prevent loosening, and no pre-tightening force is required.

[0054] The diameter of the limiting elongated hole 407 is larger than the diameter of the limiting bolt 402; the diameter of the friction elongated hole 408 is larger than the diameter of the preload bolt 403; the second bottom end plate of the first steel plate 409 is fixed to the lower frame beam.

[0055] The length of the limiting elongated hole 407 is less than the length of the friction elongated hole 408, that is, the sliding amount of the inner friction plate 401 at the limiting elongated hole 407 is less than the sliding amount at the friction elongated hole 408, so as to ensure that frictional energy dissipation between the outer convex friction plate 405 and the inner friction plate 401 always occurs during the rotational deformation process. The outer convex friction plate 405 can be made of asbestos-free organic friction material, which protrudes from the surface of the steel seam-outer friction plate 404.

[0056] like Figure 10 and Figure 11 As shown, when a horizontal seismic action occurs (X direction), the triangular support 1 converts the translational motion of the X-direction seismic action into rotation around the pin 202 (Y-axis direction). The triangular support 1 will drive the preloaded disc spring reset system 3 and the two-stage energy dissipation system 4 to generate reciprocating vertical displacement (Z direction). That is, in the preloaded disc spring reset system 3, the horizontal beam 13 drives a bottom convex plate 306 and a knife-edge beam 305 of the knife hinge device to generate reciprocating vertical displacement, further compressing the disc spring assembly 304 and generating a reset force. In the two-stage energy dissipation system 4, the inner friction plate 401 reciprocates vertically with the horizontal beam 13. The initial position of the limiting bolt 402 is in the middle of the limiting elongated hole 407. The first stage of energy dissipation is the frictional energy dissipation between the inner friction plate 401 and the outer convex friction plate 405 on the steel seam-outer friction plate 404. When the limiting bolt 402 and the limiting elongated hole 407 experience bolt hole wall pressure, that is, when the vertical displacement (Z direction) reaches half the length S of the limiting elongated hole 407, shear yielding energy dissipation will occur in the steel seam 406, that is, the metal energy dissipation will begin and enter the second stage of energy dissipation. The energy dissipation in the second stage is the frictional energy dissipation between the inner friction plate 401 and the outer convex friction plate 405 on the steel seam-outer friction plate 404, as well as the metal energy dissipation of the steel seam 406, which work together.

[0057] Because the second stage of metal energy dissipation is triggered only when the outer convex friction plate 405 and the inner friction plate 401 rub against each other and reach half the length S of the limiting elongated hole 407. The length of the limiting elongated hole 407 is determined by the performance-based design requirements of the building's seismic design. Throughout the process, since the length of the friction elongated hole 408 is greater than the length of the limiting elongated hole 407, the hole wall of the friction elongated hole 408 never comes into contact with the preload bolt 403; it only serves a connecting function.

[0058] The two-stage energy dissipation system 4 should include two or more limit bolts 402, corresponding to two or more second openings 412 and two or more limit oblong holes 407. The reason is that the multiple limit bolts 402 alter the boundary conditions of the steel joint 406, allowing for more efficient plastic energy dissipation. To improve the stress performance of the steel joint 406, the end sections of each narrow joint adopt rounded transitions. This design significantly alleviates stress concentration, thereby optimizing its energy dissipation performance.

[0059] To clearly illustrate the significant advantages of visible damage and rapid replacement mentioned in this invention, the maintenance and replacement process is as follows:

[0060] After an earthquake, maintenance personnel only need to bring the latest steel seam-external friction plate 404, visually inspect the damage to the steel seam 406 in the energy dissipation system, and replace the damaged steel seam-external friction plate 404 by loosening the preload bolt 403 and limit bolt 402 on the dual-stage energy dissipation system 4. Rapid replacement is of great importance in areas prone to aftershocks.

[0061] The stress analysis of this invention is as follows: Figure 12 As shown:

[0062] When a horizontal force is applied at the top F The return force of disc spring assembly 304 N 3. Friction force between the inner friction plate 401 and the steel seam-outer friction plate 404 N 2. Shear force of 406 steel seam N 1; The displacements corresponding to the center of rotation are respectively h , l 3, l 2, l 1; Initial preload of disc spring assembly 304 N 0; the angle is The first-order rotational stiffness of the structure is The second-order rotational stiffness of the structure is Disc spring assembly stiffness k 3. Steel joint yield strength F y Stiffness of steel joint after yielding k 1; The length of the limiting elongated hole 407 is S (like Figure 9 , Figure 11 , Figure 13 (as shown in the image).

[0063] In the first stage: when the limiting bolt 402 and the limiting elongated hole 407 are not yet under pressure on the hole wall, and only friction consumes energy;

[0064]

[0065] In specific engineering examples, the yield strength of steel joints F y It is a definite value, therefore the bending moment Fh It's about the corner. of A linear function in one variable, the first-order rotational stiffness of the structure Stiffness of disc spring assembly k 3. Linear dependence, i.e., the first-order rotational stiffness is 2. k 3 l 3 2.

[0066] In the second stage: the limiting bolt 402 and the wall of the limiting elongated hole 407 are under pressure, and metal energy is consumed in the steel seam 406;

[0067]

[0068] In specific engineering examples, h , l 3. l 2. l 1. N 0 are all definite values, therefore bending moment Fh It's about the corner. of A linear function in one variable, the second-order rotational stiffness of the structure Stiffness of disc spring assembly k 3. Stiffness of the steel joint after yielding k The first is determined by 1, meaning the second-order rotational stiffness is 2. k 1 l 1 2 +2 k 3 l 3 2 In conjunction with commonly used engineering parameters, such as the stiffness of the steel joint after yielding. k 1 is taken as 4kN / mm, the stiffness of the disc spring assembly. k The value of 3 is 5 kN / mm. l The value of 3 is 2.7 meters. l If the value is 2.3 meters, then the second-order rotational stiffness... With first-order rotational stiffness The ratio is 1.58, which means that the stiffness has been increased by more than 58%.

[0069] The beneficial effects of this invention are as follows:

[0070] exist Figure 13 In this invention, compared to existing single-stage self-resetting energy-dissipating supports, the first-stage yield force design value is maintained the same as that of existing single-stage self-resetting energy-dissipating supports. However, at maximum deformation (here referring to...), Figure 13 The corner The bending moment of the present invention Fh and its stiffness (here referring to) Figure 13 Second-order rotational stiffness The energy dissipation capacity is greater than that of existing single-stage self-resetting energy dissipation supports. Furthermore, the area enclosed by the hysteresis loop is also larger than that of existing single-stage self-resetting energy dissipation supports. This significant improvement in energy dissipation capacity, without introducing new residual deformation, significantly contributes to reducing the maximum inter-story displacement, residual displacement, and floor acceleration response of the building structure.

[0071] Meanwhile, this invention overcomes the contradiction of prioritizing the removal of reset components when dismantling damaged energy-consuming components, and offers multiple advantages such as modular assembly and rapid replacement after an earthquake.

[0072] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A functionally separated, self-resetting, two-stage energy-dissipating support, characterized in that: It includes a triangular brace (1), two sets of preloaded disc spring reset systems (3), two sets of dual-stage energy dissipation systems (4), and a pin support (2); the triangular brace (1) is located between the upper frame beam and the lower frame beam, and the triangular brace (1) includes a vertical section (11) at the top, diagonal braces (12) on both sides, and a horizontal beam (13) at the bottom. The vertical section (11) is hinged to the upper frame beam, and the center of the horizontal beam (13) is connected to the lower frame beam by the pin support (2); the horizontal beam (13) is provided at the intersection with the diagonal brace (12). A preloaded disc spring reset system (3) is provided; the end of the horizontal beam (13) is connected to the lower frame beam through the preloaded disc spring reset system (3); the dual-stage energy dissipation system (4) is provided between the pin support (2) and the preloaded disc spring reset system (3), and is close to the preloaded disc spring reset system (3); the dual-stage energy dissipation system (4) connects the beam body of the horizontal beam (13) to the lower frame beam; the preloaded disc spring reset system (3) and the dual-stage energy dissipation system (4) are symmetrically arranged with the pin support (2) as the symmetrical point; The preloaded disc spring reset system (3) includes several high-strength lead screws (301), an upper fastening nut (302), a nut end plate (303), a disc spring assembly (304), two sets of knife-handling devices, a lower fastening nut (307), and a reset support (308); each of the knife-handling devices includes a bottom convex plate (306) and a knife-edge beam (305); the bottom convex plate (306) and the knife-edge beam (305) are stacked, and one side of the bottom convex plate (306) is a plane, and the other side is provided with A protruding strip-shaped blade is placed against the reserved groove of the blade beam (305); the upper and lower sets of blade hinge devices clamp the horizontal beam (13), and the planes of the two bottom protruding plates (306) are respectively attached to the upper flange plate and the lower flange plate of the horizontal beam (13); the disc spring assembly (304) is set on the upper blade beam (305), and the nut end plate (303) is set on the disc spring assembly (304); the high-strength screw (301) passes through the groove from top to bottom. The nut end plate (303), the disc spring assembly (304), the upper blade hinge device, the horizontal beam (13), and the lower blade hinge device are respectively fixed to the upper and lower ends of the high-strength screw (301); the length direction of the strip-shaped blade is consistent with the beam width direction of the horizontal beam (13); the reset support (308) is provided with an upper toothed edge (309) and a lower toothed edge (310). The horizontal beam (13) is positioned between the upper toothed opening (309) and the lower toothed opening (310), and the upper flange plate and the lower flange plate of the horizontal beam (13) are flush with the upper toothed opening (309) and the lower toothed opening (310), respectively; the upper blade hinge device rests on the upper toothed opening (309); the lower blade hinge device is positioned below the lower toothed opening (310); the first bottom end plate of the reset support (308) is fixed to the lower frame beam.

2. The self-resetting two-stage energy dissipation support with functional separation according to claim 1, characterized in that: The dual-stage energy dissipation system (4) includes an inner friction plate (401), two steel seam-outer friction plates (404), a limiting bolt (402), and a preload bolt (403); the upper side of the inner friction plate (401) is welded to the bottom of the horizontal beam (13) along the beam length direction, and the two steel seam-outer friction plates (404) clamp the inner friction plate (401) from the front and back respectively; the inner friction plate (401) is provided with a vertical limiting elongated hole (407) and a vertical... The friction elongated hole (408) is provided, and the limiting elongated hole (407) and the friction elongated hole (408) are not arranged on the same straight line and are staggered. The length of the limiting elongated hole (407) is less than the length of the friction elongated hole (408). The steel seam-outer friction plate (404) includes a steel seam (406), a first steel plate (409), and a second steel plate (410). The transverse steel seam (406) connects the first steel plate (409) and the second steel plate (410) on both sides. Plate (410); the first steel plate (409) is provided with an outwardly protruding friction plate (405), the contact surface of the outwardly protruding friction plate (405) and the inner friction plate (401) rubs to dissipate energy; the first steel plate (409) is reserved with a first opening (411) corresponding to the center position of the friction elongated hole (408), the preload bolt (403) passes through the first opening (411) and the friction elongated hole (408) to connect the inner friction plate (401). 1) and two steel seam-outer friction plates (404); a second opening (412) is reserved on the second steel plate (410) corresponding to the center position of the limiting elongated hole (407); the limiting bolt (402) passes through the second opening (412) and the limiting elongated hole (407) to connect the inner friction plate (401) and the two steel seam-outer friction plates (404); the second bottom end plate of the first steel plate (409) is fixed to the lower frame beam.

3. The self-resetting two-stage energy dissipation support with functional separation according to claim 2, characterized in that: The number of the limiting bolts (402) is two or more, and two or more second openings (412) and two or more limiting elongated holes (407) are provided accordingly.

4. The self-resetting two-stage energy dissipation support with functional separation according to claim 2, characterized in that: The steel seam (406) is composed of multiple parallel and continuous narrow steel plate seams, and the end section of each narrow steel plate seam adopts a circular arc transition.

5. The self-resetting two-stage energy dissipation support with functional separation according to claim 1, characterized in that: The pin support (2) includes a lower ear plate (201), a pin (202) and an upper ear plate (14); the side of the upper ear plate (14) is fixed below the horizontal beam (13), the lower ear plate (201) is fixed to the lower frame beam through a base plate, and the pin (202) is used to connect the upper ear plate (14) and the lower ear plate (201).

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