A friction damper for frame structure nodes and building frame structure

Abstract

The present invention discloses a friction damper for a frame structure node and a building frame structure, wherein the damper includes a first energy consumption plate, a second energy consumption plate and a prestressed component. The aperture of the first end of the first elongated hole on the first energy consumption plate is smaller than the apertures at other positions; the building frame structure includes the above-mentioned friction damper. When an earthquake occurs, since the first end of the first elongated hole is close to the node and its aperture is smaller than the apertures at other positions of the first elongated hole, when the second energy consumption plate and the frame crossbeam simultaneously move in the first elongated hole relative to the frame column, the prestressed component can abut against the inner wall surface of the first end, and the second energy consumption plate and the frame crossbeam simultaneously rotate relative to the first energy consumption plate and the frame column with the prestressed component at the first end as the rotation axis, without the need to separately set up the existing connecting sleeve and rotating shaft, the structure of the entire friction damper is simplified, the space occupied is reduced, and the assembly and disassembly of the friction damper is also convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration reduction of building frame structures, and in particular relates to a friction damper for a frame structure node and a building frame structure. Background Art

[0002] Steel structures are widely used in earthquake-resistant structures due to their high strength, ductility, and light weight. However, in earthquakes in recent decades, a large number of steel structures have suffered brittle failures at the nodes where the beams and frame columns are connected, and stress concentration has occurred at the nodes of many steel-structured houses. In an earthquake, the collapse of steel structures is likely to occur. Even if the steel structure does not collapse, the subsequent maintenance costs of the steel structure are high.

[0003] With the continuous development of earthquake-resistant technology, steel structures have gradually shifted from anti-collapse design to recoverable functions to reduce losses after earthquakes. This steel frame structure mainly arranges special dampers at the nodes of the steel frame or inside the steel frame.

[0004] For example, Chinese patent CN106812365A discloses a friction damper, including a first connecting sleeve, a first energy absorbing plate, a second connecting sleeve, a second energy absorbing plate and a prestressed component, wherein the first connecting sleeve is fixed on the frame cross beam, and the second connecting sleeve is fixed on the frame column; one end of the first energy absorbing plate is hinged on the first connecting sleeve through an axis, and one end of the second energy absorbing plate is hinged on the second connecting sleeve through an axis; at the same time, the second energy absorbing plate is provided with a long waist hole extending along its length direction, and the first energy absorbing plate is provided with a plurality of spaced connecting holes that can be connected with the long waist hole; the prestressed component passes through the long waist hole and the connecting hole to apply a pre-tightening force to the first energy absorbing plate and the second energy absorbing plate, so that the first energy absorbing plate and the second energy absorbing plate are always kept in friction contact and fixedly connected in a stacked manner.

[0005] The friction damper of the above structure is that when an earthquake occurs in the outside world, the steel frame is deformed under the action of the earthquake, causing gaps to appear at the nodes and relative movement between the frame columns and the crossbeams. Due to the setting of the long waist hole, the first energy consumption plate and the prestressed assembly as a whole move horizontally relative to the second energy consumption plate, and the two energy consumption plates always maintain friction contact under the action of the prestressed assembly; at the same time, any one of the first energy consumption plate and the second energy consumption plate rotates relative to their respective corresponding frame columns or crossbeams, so that the crossbeam can rotate relative to the frame column to consume the energy consumption generated by the earthquake at the node; and after the earthquake, since the first energy consumption plate and the second energy consumption plate always maintain friction contact, and the crossbeam can rotate relative to the frame column, stable restoring force and energy consumption capacity are provided for the node, so that the steel frame can restore itself to the state before the earthquake after the earthquake.

[0006] However, when the above-mentioned friction damper realizes the rotation of the crossbeam relative to the frame column, it is also necessary to separately set up a first connecting sleeve or a second connecting sleeve, as well as a rotating shaft, so that the energy consumption plate can be rotated, causing the structure of the entire friction damper to be complex and not compact, and occupying a large space at the node of the frame structure, which is not convenient for the assembly of the frame structure. Summary of the invention

[0007] Therefore, the technical problem to be solved by the present invention is that the existing friction damper has a complex and non-compact structure, occupies a large space at the node of the frame structure and is inconvenient to disassemble and assemble the frame structure.

[0008] To this end, the present invention provides a friction damper for a frame structure node, comprising:

[0009] At least one first energy consumption plate is provided with a first long strip hole extending along its length direction, and the aperture of the first end of the first long strip hole is smaller than the aperture at other positions;

[0010] At least one second energy consumption plate is provided with at least one first connection hole connected to the first long strip hole; one end of the first energy consumption plate is suitable for being fixed on the frame column, and the other end is stacked on the second energy consumption plate;

[0011] At least one prestressed component corresponds to the first connection hole one by one; it is penetrated through the first connection hole, the first elongated hole and the second connection hole on the frame beam that corresponds to the first connection hole one by one, and is used to fix the first energy consumption plate and the second energy consumption plate on the frame beam along the stacking direction, and apply a pre-tightening force of mutual friction abutment to the first energy consumption plate and the second energy consumption plate.

[0012] Optionally, in the above-mentioned friction damper for a frame structure node, the other end of the first elongated hole serves as the second end; and the aperture of the first elongated hole gradually increases from the first end toward the second end.

[0013] Optionally, in the above-mentioned friction damper for a frame structure node, at least the outer diameter of the first fastener of the prestressed component passing through the first elongated hole matches the hole diameter of the first end.

[0014] Optionally, in the above-mentioned friction damper for the node of the frame structure, the prestressed component also includes a locking component locked on the end of the first fastener; and at least one elastic component mounted on the first fastener, the two ends of the elastic component respectively abutting against the locking component and an energy consumption plate close to the locking component, and the elastic component applies a preload force to the energy consumption plate facing away from the locking component.

[0015] Optionally, in the above-mentioned friction damper for the frame structure node, at least one first friction part and at least one second friction part are respectively provided on the surfaces facing each other of the first energy consumption plate and the second energy consumption plate, and the first friction part corresponds to the second friction part one by one and is slidably tightly abutted.

[0016] Optionally, in the above-mentioned friction damper for a frame structure node, one of the first friction portion and the second friction portion is a convex tooth protruding outward, and the other is a groove cooperating with the convex tooth, and at least one side wall where the convex tooth and the groove are slidably abutted are respectively a first slope surface and a second slope surface.

[0017] Optionally, in the above-mentioned friction damper for a frame structure node, there are at least two first friction parts, and correspondingly there are at least two second friction parts, all of the first friction parts are arranged adjacent to each other in sequence, and all of the second friction parts are arranged adjacent to each other in sequence.

[0018] Optionally, in the above-mentioned friction damper for a frame structure node, the longitudinal cross-sectional shapes of the protruding teeth and the grooves are both triangular or trapezoidal, and the hypotenuse of the triangle or the oblique waist of the trapezoid serves as the first slope surface or the second slope surface.

[0019] The present invention also provides a building frame structure, comprising

[0020] At least two frame columns, arranged vertically and spaced horizontally:

[0021] At least one frame crossbeam, horizontally arranged between two adjacent frame columns;

[0022] At least two of the friction dampers for frame structure nodes described in any one of the above items, both ends of the frame crossbeam are connected to the adjacent frame columns through at least one of the friction dampers.

[0023] Optionally, the above-mentioned building frame structure further comprises at least one energy dissipation damper provided at a node between the frame columns;

[0024] Any of the energy dissipation dampers comprises a fixing member, the fixing member having a horizontal portion and a vertical portion connected to the horizontal portion, the vertical portion being fixed to the frame column, the horizontal portion being provided with a second long strip hole extending from a direction close to the node toward a direction away from the node; correspondingly, the frame cross beam is provided with at least one third connection hole connected to the second long strip hole; and

[0025] A fastening component corresponding to the third connecting holes one by one and penetrating the third connecting holes and the second elongated hole;

[0026] The diameter of the second long strip hole gradually increases from close to the frame structure node toward away from the frame structure node.

[0027] The technical solution of the present invention has the following advantages:

[0028] 1. The friction damper for a frame structure node provided by the present invention comprises a first energy consumption plate, a second energy consumption plate and a prestressed component. The first energy consumption plate is provided with a first elongated hole extending along its length direction, and the aperture of the first end of the first elongated hole is smaller than the aperture at other positions; the second energy consumption plate is provided with at least one first connecting hole connected to the first elongated hole; one end of the first energy consumption plate is suitable for being fixed on the frame column, and the other end is stacked on the second energy consumption plate; the prestressed component corresponds to the first connecting hole one by one; and the second connecting hole penetrating the first connecting hole, the first elongated hole and the frame cross beam corresponding to the first connecting hole one by one is used to fix the first energy consumption plate and the second energy consumption plate on the frame cross beam along the stacking direction, and apply a pre-tightening force of mutual friction abutment to the first energy consumption plate and the second energy consumption plate.

[0029] The friction damper of this structure, when fixing the node between the frame beam and the frame column, one end of the first energy consumption plate close to the first end is fixed on the frame column, so that the first energy consumption plate and the frame beam are in a relatively fixed state; the prestressed component is inserted into the first connecting hole, the first long strip hole and the second connecting hole. Since the first energy consumption plate is provided with the first long strip hole, the prestressed component fixes the second energy consumption plate on the frame beam, and the second energy consumption plate and the frame beam can slide along their length direction in the first long strip hole, so that the second energy consumption plate and the frame beam are in a relatively fixed state; when an earthquake occurs, when a gap is generated at the node between the frame beam and the frame column, the second energy consumption plate and the frame beam are simultaneously The frame column moves in the first elongated hole; at the same time, since the first end of the first elongated hole is close to the node and the aperture of the first end is smaller than the apertures at other positions of the first elongated hole, when the second energy consumption plate and the frame cross beam move in the first elongated hole relative to the frame column at the same time, the prestressed component can abut against the inner wall surface of the first end, so that the second energy consumption plate and the frame cross beam simultaneously rotate relative to the first energy consumption plate and the frame column with the prestressed component at the first end as the rotation axis, and there is no need to separately set the existing connecting sleeve and rotating shaft on the friction damper, which simplifies the structure of the entire friction damper, occupies less space at the node of the frame structure, and is also convenient for assembly and disassembly of the friction damper.

[0030] 2. The friction damper for the frame structure node provided by the present invention, the other end of the first elongated hole serves as the second end; the aperture of the first elongated hole gradually increases from the first end toward the second end, which is convenient for processing the first elongated hole on the first energy consumption plate on the one hand, and on the other hand, when the prestressed component is inserted into the first elongated hole and the second energy consumption plate and the frame beam move, the gradually increasing aperture guides the sliding of the prestressed component in the first elongated hole; at the same time, it makes it easier for the prestressed component close to the node to abut against the inner wall surface of the first end of the first elongated hole to form a rotation axis of the second energy consumption plate and the frame beam.

[0031] 3. The friction damper for the frame structure node provided by the present invention has at least one first friction part and at least one second friction part respectively provided on the surfaces facing each other of the first energy consumption plate and the second energy consumption plate, the first friction part corresponds to the second friction part one by one and can be slidably abutted against each other, and the cooperation of the two friction parts increases the friction force of the friction damper, thereby improving the energy dissipation effect in earthquake resistance.

[0032] Furthermore, one of the first friction portion and the second friction portion is a convex tooth protruding outward, and the other is a groove matching the convex tooth, and the side walls where the convex tooth and the groove match have a first slope surface and a second slope surface respectively, and a friction centering force is formed by the sliding abutment of the first slope surface and the second slope surface, and the centering force can generate a vertical component force in the vertical direction. When an earthquake occurs, the first energy consumption plate and the second energy consumption plate move relative to each other, and correspondingly, the first slope surface and the second slope surface slide away from each other in the vertical direction, and the vertical component force further increases the preload force between the first energy consumption plate and the second energy consumption plate given by the prestressed component, so that the energy consumption of the first energy consumption plate and the second energy consumption plate in the earthquake can be changed; on the contrary, after the earthquake, the first slope surface and the second slope surface slide close to each other in the vertical direction, and the vertical component force is reduced to release the increased preload force. At this time, under the action of the original preload force of the prestressed component, the first energy consumption plate and the second energy consumption plate can be reset to the initial state.

[0033] 4. The building frame system provided by the present invention includes at least two frame columns, at least one frame beam and at least two of the above-mentioned friction dampers for frame structure nodes, at least two frame columns are vertically arranged and horizontally spaced apart: at least one frame beam is horizontally arranged between two adjacent frame columns; both ends of the frame beam are respectively connected to the adjacent frame columns through at least one friction damper.

[0034] The building frame system of this structure adopts any of the above-mentioned friction dampers at the nodes of the frame beams and the frame columns to be connected, so that the frame system can play an earthquake-resistant role in an earthquake; and can be restored to the initial state after the earthquake, that is, it can achieve the effects of variable energy consumption and restorable function, and can also make the structure of the entire building frame system compact, occupying a small space and being easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic top view of the building frame structure provided in Example 2;

[0037] Figure 2 for Figure 1 A partial enlarged view of the building frame structure;

[0038] Figure 3 for Figure 2 Schematic diagram of the longitudinal section of the building frame structure along AA;

[0039] Figure 4a for Figure 3 A schematic diagram of the surface of the first energy dissipation plate of the friction damper of the building frame structure facing the frame beam;

[0040] Figure 4b for Figure 4a A schematic diagram of the structure of the other side surface of the first energy consumption plate;

[0041] Figure 5a for Figure 3 A schematic structural diagram of the surface of the second energy dissipation plate of the friction damper of the building frame structure facing away from the frame cross beam;

[0042] Figure 5b for Figure 5a A schematic diagram of the structure shown on the other side of the second energy consumption plate;

[0043] Figure 6 for Figure 3 A schematic diagram of the structure of the fixing parts in the energy dissipation damper of the building frame structure;

[0044] Figure 7 for Figure 3 A schematic diagram showing the front view direction of the frame columns of the building frame structure;

[0045] Figure 8 for Figure 3 A schematic diagram of a frame beam of a building frame structure in a top-down direction;

[0046] Fig. 9 for Figure 3 A schematic diagram of the relative movement of the first energy consumption panel and the second energy consumption panel in the building frame structure;

[0047] Fig.10 for Figure 3 Schematic diagram of the overall deformation of the second energy consumption plate, frame beam and friction plate relative to the frame column in the building frame structure;

[0048] Fig.11 for Figure 3 Schematic diagram of the structure of the friction plate of the energy dissipation damper in the building frame structure;

[0049] Description of reference numerals:

[0050] 11-frame column; 111-eighth connecting hole; 112-sixth connecting hole; 12-frame crossbeam; 121-second connecting hole; 122-third connecting hole; 21-first energy consumption plate; 211-first long strip hole; 212-first friction part; 22-second energy consumption plate; 221-first connecting hole; 231-first fastener; 232-elastic member; 233-locking member; 224-second friction part;

[0051] 31-fixing member; 311-second long strip hole; 312-seventh connecting hole; 32-friction plate; 321-fourth connecting hole. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] Example 1

[0055] This embodiment provides a friction damper for a frame structure node, such as Figures 1 to 11 As shown, it includes at least one first energy consumption plate 21 , at least one second energy consumption plate 22 , and at least one prestressed component 23 .

[0056] For example, Figure 3 As shown, the first energy consumption plate 21 and the second energy consumption plate 22 are two pieces respectively, and the prestressed components 23 are multiple. For the first energy consumption plate 21, as Figure 4a As shown, the first energy consumption plate 21 is provided with a first long strip hole 211 extending along its length direction, and one end of the first long strip hole 211 close to the frame structure node is used as the first end ( Figure 4a The right end in the middle), and the other end away from the node as the second end ( Figure 4a The diameter of the first elongated hole 211 gradually increases from the first end toward the second end. Figure 3 As shown, during use, one end of the first energy consumption plate 21 close to the first end is suitable for being fixed on the frame column 11 , and the other end close to the second end is stacked on the second energy consumption plate 22 .

[0057] For example, Figure 3 As shown, one end of the first energy consumption plate 21 is provided with a vertical first bending portion ( Figure 3 The first bending portion is provided with at least one fifth connection hole (not shown in the figure), and the frame column 11 is provided with a sixth connection hole (not shown in the figure) corresponding to and connected with the fifth connection hole. The first bending portion is fixed to the frame column 11 by fasteners, such as bolts or screws, which are inserted into the fifth connection hole and the sixth connection hole. That is, the first energy consumption plate 21 is L-shaped, and the horizontal portion of the L-shape is provided with a first long strip hole 211, and the vertical portion of the L-shape is fixed to the frame column 11 as the first bending portion, so that the first energy consumption plate 21 and the frame column 11 are always in a relatively fixed state.

[0058] like Figure 5a and Figure 5b As shown, the second energy consumption plate 22 is provided with at least one first connection hole 221 connected to the first long strip hole 211. For example, there are seven first connection holes 221, or other numbers, such as one, two, three, four, five, six, or eight, nine, etc. The specific number can be selected according to actual needs.

[0059] like Figure 8 As shown, corresponding to the above-mentioned first connection hole 221, a second connection hole 121 corresponding to the first connection hole 221 and vertically connected is provided on the frame cross beam 12. A plurality of prestressed components 23 correspond to the first connection hole 221 and the second connection hole 121 one by one, and the prestressed components 23 are penetrated through the first connection hole 221, the first long strip hole 211 and the second connection hole 121, and the first energy consumption plate 21 is fixed on the frame cross beam 12 in the vertical direction, and a pre-tightening force of mutual friction abutment is applied to the first energy consumption plate 21 and the second energy consumption plate 22, and the second energy consumption plate is slidably arranged on the first energy consumption plate along the length direction of the first long strip hole.

[0060] The prestressed component 23 fixes the second energy consumption plate 22 on the frame cross beam 12 vertically, so that the second energy consumption plate 22 and the frame cross beam 12 are always in a relatively fixed state without relative movement along the length direction of the first long strip hole. Due to the setting of the first elongated hole 211, the plurality of prestressed components 23, the second energy consumption plate 22 and the frame cross beam 12 as a whole slide relative to the first energy consumption plate 21 and the frame column 11 in the length direction of the first elongated hole 211; at the same time, the plurality of prestressed components 23 are inserted into the first elongated hole 211. Since the aperture of the first elongated hole 211 gradually increases from the first end toward the second end, when the second energy consumption plate 22, the prestressed components 23 and the frame cross beam 12 as a whole slide relative to the first energy consumption plate 21, the prestressed components 23 close to the first end will abut against the inner wall of the first end, forming the second energy consumption plate 22 and the frame cross beam 12 to rotate relative to the rotation axis of the first energy consumption plate 21 and the frame column 11. There is no need to separately set a connecting sleeve and a connecting shaft as in the prior art to realize the rotation of the frame cross beam 12 relative to the frame column 11, thereby simplifying the structure of the friction damper.

[0061] For the prestressed component 23, if Figure 3As shown, each prestressed component 23 includes a first fastener 231, a locking component 233 and at least one elastic component 232. The locking component 233 is locked on the end of the first fastener 231; the elastic component 232 is sleeved on the first fastener 231, and the two ends of the elastic component 232 are respectively abutted against the locking component 233 and the energy consumption plate close to the locking component 233, and the elastic component 232 applies a pre-tightening force to the energy consumption plate that is back to the locking component 233.

[0062] For example, two first energy consumption plates 21 are respectively arranged on the top surface and the bottom surface of the frame cross beam 12, and two second energy consumption plates 22 are respectively arranged on the top of the first energy consumption plate 21 located at the top and the bottom of the first energy consumption plate located at the bottom. That is, the first energy consumption plate 21 is clamped between the second energy consumption plate 22 and the frame cross beam 12. Optimally, the frame cross beam 12 includes a top plate, a bottom plate, and a web plate clamped between the top plate and the bottom plate, the web plate extends out of the top plate and the bottom plate, and the first energy consumption plate 21 is clamped between the second energy consumption plate 22 and the web plate.

[0063] For the first fastener 231, preferably, the first fastener 231 is a stud bolt, the locking component 233 is preferably a nut, the elastic component 232 is preferably a disc spring, and there are two nuts and two disc springs.

[0064] like Figure 3 As shown, the bolt is passed through the first connecting hole 221, the first elongated hole 211, and the second connecting hole 121, and the top and bottom of the bolt extend out of the corresponding second energy consumption plate 22 respectively, and the two nuts are locked on the top and bottom of the bolt respectively; the two disc springs are both sleeved on the bolt, and the two ends of the disc spring located on the upper side are respectively abutted between the nut located on the upper side and the second energy consumption plate 22; the two ends of the disc spring located on the lower side are respectively abutted between the nut located on the lower side and the second energy consumption plate 22, the disc spring located on the upper side applies a downward preload force to the second energy consumption plate 22 located on the upper side, and the disc spring located on the lower side applies an upward preload force to the second energy consumption plate 22 located on the lower side, so that the surfaces of the second energy consumption plate 22 located on the upper side and the first energy consumption plate 21 facing each other are always in friction abutment; the surfaces of the second energy consumption plate 22 located on the lower side and the first energy consumption plate 21 facing each other are always in friction abutment, generating friction force to play an energy consumption role.

[0065] Optimally, the outer diameter of the bolt matches the hole diameter at the first end, that is, they are equal or almost equal. When the second energy consumption plate 22 and the frame cross beam 12 move relative to the first energy consumption plate 21 and the frame column 11, the outer wall of the bolt can completely abut against the inner wall of the first end, forming a stable rotation fulcrum for the second energy consumption plate 22. Of course, only the outer diameter of the bolt of the prestressed component 23 adjacent to the first end can match the hole diameter at the first end, and the outer diameter of the bolt of the other prestressed components 23 can be larger than the hole diameter of the first end, as long as they can be inserted into the first elongated hole 211 to fix the first energy consumption plate 21, the second energy consumption plate 22, and the frame cross beam 12.

[0066] Optimally, the outer diameter of the bolt is equal to or almost equal to the diameter of the first connection hole 221 and the second connection hole 121, ensuring that when the prestressed assembly 23 is installed in place, the second energy consumption plate 22 and the frame cross beam 12 always remain in a fixed state, without relative movement in the vertical direction, and only move and rotate as a whole in the horizontal direction to overcome the deformation of the node during an earthquake. In addition, the bolts are all high-strength bolts used in the construction industry.

[0067] Preferably, if Figure 4b and Figure 5b As shown, at least two first friction parts 212 and at least two second friction parts 224 are respectively arranged on the surfaces facing each other of the first energy consumption plate 21 and the second energy consumption plate 22, all the first friction parts 212 are arranged adjacent to each other in sequence, and all the second friction parts 224 are arranged adjacent to each other in sequence. For example, the first friction part 212 is a convex tooth, and the second friction part 224 is a groove suitable for the convex tooth to be embedded, and the convex tooth and the groove correspond to each other to form a concave-convex match, and the side walls of the convex tooth and the groove respectively have a first slope surface and a second slope surface, for example, the longitudinal cross-sectional shape of the convex tooth and the groove are both triangular, and the two hypotenuses of the triangle corresponding to the convex tooth are respectively used as a first slope surface, and the two hypotenuses of the triangle corresponding to the groove are respectively used as a second slope surface, and the first slope surface corresponds to the second slope surface one by one and can be slidably abutted, so that the surfaces facing each other of the first energy consumption plate 21 and the second energy consumption plate 22 form a corrugated surface abutment, so as to increase the friction between the first energy consumption plate 21 and the second energy consumption plate 22, and further improve the energy dissipation effect of the friction damper.

[0068] That is, a friction centering force is formed between the first slope of the convex tooth and the second slope of the groove. The centering force can generate a vertical component force in the vertical direction. When the first energy consumption plate and the second energy consumption plate move relative to each other in an earthquake, the first slope and the second slope slide away from each other in the vertical direction. The vertical component force further increases the preload force of the butterfly spring, so that the energy consumption of the first energy consumption plate and the second energy consumption plate in the earthquake can be changed; after the earthquake, the first slope and the second slope slide close to each other in the vertical direction, and the vertical component force is reduced and the increased compression of the butterfly spring is released. At this time, under the initial preload force of the butterfly spring, the first energy consumption plate and the second energy consumption plate are reset to the starting state. As for the slope formed between the first slope of the convex tooth and the horizontal plane, it can be 20 degrees, 15 degrees, 30 degrees, 45 degrees, etc., without specific limitation, and can be determined according to actual needs. It is only necessary to realize the reset of the first energy consumption plate and the second energy consumption plate under the preload force of the above-mentioned disc spring.

[0069] During use, the friction damper is used to fix the nodes of the frame beam 12 and the frame column 11. When an earthquake occurs, Fig.10 As shown, as the gap between the frame cross beam 12 and the frame column 11 opens, due to the setting of the first long strip hole 211, the first energy consumption plate 21 and the frame column 11 form a first fixed body, the second energy consumption plate 22 and the frame cross beam 12 form a second fixed body, the first fixed body and the second fixed body move in opposite directions, the bolts in the prestressed assembly 23 move in the first long strip hole, and relative sliding occurs between the convex teeth on the first energy consumption plate 21 and the corresponding grooves on the second energy consumption plate 22, for example, Fig. 9 As shown, the convex teeth are Fig. 9 Slide the left side of the Fig. 9 When the right side of the disc 21 slides toward the left side, the second energy dissipation plate 22 presses the disc spring toward the nut, and the disc spring is further compressed and deformed, thereby increasing the preload force of the disc spring on the first energy dissipation plate 21 and the second energy dissipation plate 22 (that is, the centering force between the first slope surface and the second slope surface increases the preload force of the disc spring in the vertical component), thereby increasing the friction force between the first energy dissipation plate 21 and the second energy dissipation plate 22, thereby ensuring that the convex teeth will not separate from the corresponding grooves during the movement, thereby improving the energy dissipation capacity of the damper; at the same time, during an earthquake, due to the movement of the first energy dissipation plate 21 and the second energy dissipation plate 22, the bolt in the rightmost prestressed component 23 just abuts against the inner hole wall of the first end, and the second fixed body rotates relative to the first fixed body with the bolt as the rotation axis.

[0070] After an earthquake, the node between the frame beam 12 and the frame column 11 is not deformed by the earthquake, and the gap between the node between the frame beam 12 and the frame column 11 gradually decreases. The first energy consumption plate 21 and the second energy consumption plate 22 move relatively close to each other. Fig. 9 As shown, the convex teeth are Fig. 9The right side moves to the left side, the groove moves from the left side to the right side, the first slope surface and the second slope surface slide towards each other, the disc spring releases the further compressed amount, and under the initial preload force, drives the convex teeth and the groove to reset, thereby resetting the first energy consumption plate 21, the second energy consumption plate 22, the frame beam 12 and the frame column 11 to the starting position, so that the function of the frame structure can be restored.

[0071] The friction damper of this embodiment gradually increases the aperture of the first elongated hole 211 from the first end toward the second end. During an earthquake, the bolts abutting against the hole wall at the first end form the rotation axis of the second energy consumption plate 22 and the frame cross beam 12. This eliminates the need to separately set a rotating shaft and a connecting sleeve as in the prior art, thereby simplifying the structure of the entire friction damper and facilitating the assembly and disassembly of the friction damper at the node.

[0072] As a first alternative implementation of the above embodiment, the longitudinal cross-sectional shape of the above-mentioned convex teeth and grooves can also be other structures, such as a trapezoid, with the two waists of the corresponding trapezoid serving as a first slope or a second slope respectively; or a right-angled trapezoid, with the oblique waist of the right-angled trapezoid serving as the first slope or the second slope. Alternatively, as a deformation, the first friction part 212 and the second friction part 224 are respectively rough surfaces for friction, and the first friction part 212 and the second friction part 224 are directly slidably abutted. Alternatively, the above-mentioned first friction part 212 and the second friction part 224 may not be provided, and it is only necessary to keep the surfaces of the first energy consumption plate 21 and the second energy consumption plate 22 facing each other in friction abutment under the preload force of the prestressed component 23.

[0073] As a second replaceable implementation of the above embodiment, the elastic member 232 in the prestressed assembly 23, in addition to the above-mentioned disc spring, can also be a spring or spring leaf of other shapes, as long as it can apply a tightly abutting preload force to the surfaces of the first energy consumption plate 21 and the second energy consumption plate 22 facing each other.

[0074] As a third replaceable implementation of the above embodiment, the first elongated hole 211 can be a long waist hole, or the aperture of the first end of the first elongated hole 211 is smaller than the aperture at other positions. There is no need for the aperture of the first elongated hole 211 to gradually increase from the first end toward the second end. At this time, the prestressed component 23 in the first end can also form a rotation fulcrum for the first energy consumption plate 21 and the frame beam.

[0075] Example 2

[0076] This embodiment provides a building frame structure, such as Figure 1 and Figure 2 As shown, it includes at least two frame columns 11, at least one frame beam 12 and at least two friction dampers provided by any one of the implementation methods of Example 1.

[0077] Among them, a plurality of frame columns 11 are arranged vertically and horizontally at intervals; each frame beam 12 is arranged horizontally between two adjacent frame columns 11; and both ends of the frame beam 12 are connected to the adjacent frame columns 11 through at least one friction damper. For example, Figure 1 Two friction dampers are respectively used to connect one end of the frame beam 12 with its adjacent frame column 11.

[0078] The building frame structure of this embodiment uses the friction damper in Example 1 to fix the nodes of the frame beam 12 and the frame column 11, so that the building frame structure has energy dissipation and functional recovery performance in earthquakes. At the same time, the building frame structure has a compact structure, occupies a small space, and is easy to install and disassemble the frame structure.

[0079] like Figure 1 As shown, the building frame structure also includes at least one energy dissipation damper arranged at the node between the frame columns 11 and the frame columns 11; the position of the energy dissipation damper at the node avoids the above-mentioned friction damper, for example, an energy dissipation damper is arranged between two friction dampers.

[0080] For the structure of the energy dissipation damper, Figure 2 , Figure 6 and Fig.10 As shown, it includes a fixing member 31 and a fastening assembly. The fixing member 31 has a horizontal portion and a vertical portion connected to the horizontal portion, the vertical portion is fixed to the frame column 11, and the horizontal portion is provided with a second long strip hole 311 extending from the node to the direction away from the node. For example, the fixing member 31 is an angle steel; the vertical portion of the angle steel is provided with a seventh connection hole 312, as shown in FIG. Figure 7 As shown, the frame column 11 is provided with an eighth connection hole 111 corresponding to the seventh connection hole 312 , and the vertical portion is fixed to the frame column 11 by fasteners passing through the seventh connection hole 312 and the eighth connection hole 111 .

[0081] Correspondingly, if Figure 8As shown, at least one third connecting hole 122 connected to the second elongated hole is provided on the frame beam 12; the fastening assembly corresponds to the third connecting hole 122 one by one, and is penetrated through the third connecting hole 122 and the second elongated hole; for example, the fastening assembly includes a bolt and a nut, the bolt is penetrated through the third connecting hole 122 and the second elongated hole 311, and the nut locks and fixes the end of the bolt to realize the connection between the fixing member 31 and the frame beam 12; the aperture of the second elongated hole 311 gradually increases from close to the frame structure node toward the direction away from the frame structure node, and the second elongated hole 311 and the first elongated hole 211 in the friction damper play the same role, on the one hand, it allows the frame beam 12 and the fastening assembly to move relative to the fixing member 31 as a whole, and on the other hand, the bolt in the fastening assembly can abut against the inner wall of the aperture of the second elongated hole 311 at one end close to the node, forming a rotation fulcrum for the frame beam 12 to rotate relative to the frame column 11, further enhancing the energy consumption effect of the frame structure.

[0082] Optimally, as Fig.11 As shown, the energy dissipation damper also includes a friction plate 32, which is clamped between the frame crossbeam 12 and the horizontal part of the fixing member 31. Optimally, the friction plate 32 is clamped between the template of the frame crossbeam and the horizontal part of the fixing member. The friction plate 32 is provided with a fourth connection hole 321 corresponding to the third connection hole 122. The bolts of the fastening assembly are passed through the third connection hole 122, the second long strip hole and the fourth connection hole 321 to fix the friction plate 32 on the frame crossbeam 12. The provision of the friction plate 32 further increases the friction between the frame crossbeam 12 and the horizontal part of the fixing member 31, thereby improving the energy dissipation effect. Of course, the above-mentioned friction plate may not be provided.

[0083] In addition, optimally, the frame beams and frame columns are made of steel, or other materials used in the construction industry.

[0084] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A friction damper for a frame structure node, characterized in that: include At least one first energy consumption plate (21) is provided with a first long strip hole (211) extending along its length direction, and the hole diameter of the first end of the first long strip hole (211) is smaller than the hole diameters at other positions; At least one second energy consumption plate (22) is provided with at least one first connection hole (221) communicating with the first long strip hole (211); one end of the first energy consumption plate (21) is suitable for being fixed on the frame column (11), and the other end is stacked on the second energy consumption plate (22); the first energy consumption plate (21) and the second energy consumption plate (22) are respectively two pieces; At least one prestressed component corresponds one-to-one with the first connection hole (221); and is penetrated through the first connection hole (221), the first elongated hole (211), and the second connection hole (121) on the frame crossbeam (12) that corresponds one-to-one with the first connection hole (221), and is used to fix the first energy consumption plate (21) and the second energy consumption plate (22) on the frame crossbeam (12) along the stacking direction, and to apply a pre-tightening force of mutual friction abutment to the first energy consumption plate (21) and the second energy consumption plate (22).

2. The friction damper for a frame structure node according to claim 1, characterized in that: The other end of the first elongated hole (211) serves as the second end; the aperture of the first elongated hole (211) gradually increases from the first end toward the second end.

3. The friction damper for a frame structure node according to claim 1, characterized in that: At least the outer diameter of the first fastener (231) of the prestressed component inserted into the first elongated hole (211) matches the hole diameter of the first end.

4. The friction damper for a frame structure node according to claim 3, characterized in that: The prestressed component further comprises a locking component (233) locked on an end of the first fastener (231); and at least one elastic component (232) sleeved on the first fastener (231), wherein two ends of the elastic component (232) respectively abut against the locking component (233) and an energy consumption plate close to the locking component (233), and the elastic component (232) applies a pre-tightening force to the energy consumption plate in a direction away from the locking component (233).

5. The friction damper for a frame structure node according to any one of claims 1 to 4, characterized in that: At least one first friction portion (212) and at least one second friction portion (224) are respectively provided on surfaces of the first energy consumption plate (21) and the second energy consumption plate (22) facing each other, and the first friction portion (212) corresponds to the second friction portion (224) one by one and is slidably and tightly abutted against each other.

6. The friction damper for a frame structure node according to claim 5, characterized in that: One of the first friction part (212) and the second friction part (224) is a convex tooth protruding outward, and the other is a groove cooperating with the convex tooth, and at least one side wall where the convex tooth and the groove are in sliding contact is respectively a first slope surface and a second slope surface.

7. The friction damper for a frame structure node according to claim 6, characterized in that: There are at least two first friction parts (212), and correspondingly there are at least two second friction parts (224), all of the first friction parts (212) are arranged adjacent to each other in sequence, and all of the second friction parts (224) are arranged adjacent to each other in sequence.

8. The friction damper for a frame structure node according to claim 6 or 7, characterized in that: The longitudinal cross-sectional shapes of the protruding teeth and the grooves are both triangular or trapezoidal, and the hypotenuse of the triangle or the oblique waist of the trapezoid serves as the first slope surface or the second slope surface.

9. A building frame structure, characterized in that: include At least two frame columns (11), arranged vertically and spaced apart horizontally: At least one frame crossbeam (12) arranged horizontally between two adjacent frame columns (11); At least two friction dampers for frame structure nodes according to any one of claims 1 to 8, wherein both ends of the frame cross beam (12) are connected to adjacent frame columns (11) via at least one of the friction dampers.

10. The building frame structure according to claim 9, characterized in that: It also includes at least one energy dissipation damper provided at a node between the frame column (11) and the frame column (11); Any of the energy dissipation dampers comprises a fixing member (31), the fixing member (31) having a horizontal portion and a vertical portion connected to the horizontal portion, the vertical portion being fixed to the frame column (11), the horizontal portion being provided with a second elongated hole (311) extending from a direction close to the node toward a direction away from the node; correspondingly, the frame cross beam (12) is provided with at least one third connection hole (122) communicating with the second elongated hole (311); and A fastening component corresponding one-to-one to the third connection holes (122) and penetrating the third connection holes (122) and the second elongated hole (311); The aperture of the second long strip hole (311) gradually increases from a direction close to the frame structure node toward a direction away from the frame structure node.

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