CN114790847A - Rotary type variable friction self-resetting node - Google Patents
Rotary type variable friction self-resetting node Download PDFInfo
- Publication number
- CN114790847A CN114790847A CN202210423234.1A CN202210423234A CN114790847A CN 114790847 A CN114790847 A CN 114790847A CN 202210423234 A CN202210423234 A CN 202210423234A CN 114790847 A CN114790847 A CN 114790847A
- Authority
- CN
- China
- Prior art keywords
- plate
- column
- friction
- bolt
- lug plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/024—Structures with steel columns and beams
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a rotary variable-friction self-resetting node which comprises a beam end lug plate, two column end lug plates, a self-resetting damping mechanism and a plurality of high-strength bolts, wherein the beam end lug plate is fixedly connected with the beam end lug plate; the two column end ear plates are arranged in parallel, the beam end ear plate is arranged between the two column end ear plates, a plurality of corresponding bolt holes are formed in the beam end ear plate and the column end ear plate, a central hole of each bolt hole in the beam end ear plate is a round hole, bolt holes around the central hole are arc-shaped long round holes, bolt holes in the column end ear plates are round holes, and high-strength bolts penetrate through the corresponding bolt holes to connect the two column end ear plates with one beam end ear plate; two column end otic placodes and a beam-ends otic placode form rotatable three-layer construction, and the column end otic placode takes place relative rotation with the beam-ends otic placode and resets and consume energy through from restoring to the throne damping mechanism. The rotary type friction-variable self-resetting node can be applied to common beam-column nodes, and is simple in structural form and convenient to assemble.
Description
Technical Field
The invention relates to the field of beam-column node self-resetting, in particular to a rotary variable-friction self-resetting node.
Background
The traditional steel frame can generate larger residual deformation under the action of earthquake, thereby causing the structure to be damaged. The structural introduction of the self-reset energy-consuming component can reduce the residual deformation of the frame, has strong repairability, and can restore the normal use function as soon as possible after an earthquake. With the development of the design concept based on performance earthquake resistance, the structure which is developed after the strong earthquake and can be continuously used after simple repair even without repair constitutes a current research hotspot of seismic engineering.
The node is an important component playing a connecting role in the frame structure, and the recoverability of the node has an important influence on the whole structure. The self-reset node is a node which can restore the deformation of the structure after the earthquake action, and has the advantages of an assembled node and good earthquake coping capability. The self-reset node is designed by adopting a ductile connection concept, namely, when the structure is subjected to earthquake force, the rigidity of the node is reduced by loosening the connection of the node, so that the structure can generate larger deformation, the earthquake energy is released along with the deformation of the node through an additional energy consumption device, the structure does not need to generate plastic deformation to consume energy, the component is prevented from being irreversibly damaged, and the reliability of the structure is improved.
The existing self-reset energy consumption node mostly consumes energy by using energy consumption mild steel and performs self-reset by using a prestress technology. However, the energy-consuming mild steel needs to be additionally provided with a large restoring force to overcome the damping force of the energy-consuming mild steel when the structure is in self-reset, and needs to be replaced for many times after being used to ensure that sufficient energy-consuming reserve is provided; the prestressed self-resetting device is complex in structural form and has certain limitation on the section of a frame beam column. Therefore, the traditional self-resetting energy consumption node has some complex technical characteristics and defects in the application of the self-resetting structure, and therefore, the research on the novel self-resetting energy consumption node plays an important role in the design of the structure.
Disclosure of Invention
The invention provides a rotary type friction-variable self-resetting node, aiming at overcoming the defects of the prior art. The self-resetting node comprises two column end lug plates, a beam end lug plate, two pairs of friction disks (each pair of friction disks comprises an outer friction disk and an inner friction disk), high-strength bolts connected with the lug plates and a disc spring group formed by overlapping/involutory. The slope surface of the friction disc is self-restored by utilizing the elastic potential energy accumulated by the disc spring and the lug plate at the column end. The self-reset node can realize nondestructive restoration under medium and small earthquakes and has good self-reset capability under large earthquakes; meanwhile, the self-reset node has the characteristic of variable friction, and the friction force is increased rapidly along with the increase of the rotation angle, so that the energy consumption capacity under different earthquake conditions of medium and small earthquakes and large earthquakes is met.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a rotary type friction-variable self-resetting node comprises a beam end lug plate, two column end lug plates, a self-resetting damping mechanism and a plurality of high-strength bolts; the two column end ear plates are arranged in parallel, the beam end ear plate is arranged between the two column end ear plates, a plurality of corresponding bolt holes are formed in the beam end ear plate and the column end ear plate, a central hole of each bolt hole in the beam end ear plate is a round hole, bolt holes around the central hole are arc-shaped long round holes, bolt holes in the column end ear plates are round holes, and a high-strength bolt penetrates through the corresponding bolt holes to sequentially connect one column end ear plate, one beam end ear plate and the other column end ear plate; two column end otic placodes and a beam-ends otic placode form rotatable three-layer construction, and the column end otic placode takes place relative rotation with the beam-ends otic placode after through restoring to the throne damping mechanism from and consume energy.
As a further preference of the present invention, the self-resetting damping mechanism comprises two pairs of friction disc assemblies and disc spring assemblies; each pair of friction disc components comprises an inner friction disc and an outer friction disc, a plurality of corresponding variable slope surfaces are arranged on the surface of one side of the inner friction disc opposite to the outer friction disc, the variable slope surfaces of the inner friction disc and the outer friction disc can be mutually matched, the friction disc components are arranged between the beam end lug plate and the column end lug plate, the inner friction discs are welded on the two sides of the beam end lug plate, the outer friction discs are welded on the inner side of the column end lug plate, the inner friction disc is provided with an arc-shaped long round hole and a round hole corresponding to the beam end lug plate, the outer friction disc is provided with a bolt hole corresponding to the column end lug plate, and the high-strength bolt sequentially penetrates through the bolt hole of the column end lug plate, the bolt hole of the outer friction disc, the arc-shaped long round hole or the round hole of the inner friction disc, the arc-shaped long round hole or the round hole of the beam end lug plate, the arc-shaped long round hole or the round hole of the other inner friction disc, the bolt hole of the other outer friction disc and the bolt hole of the other column end lug plate; the disc spring group is sleeved on a bolt rod of the high-strength bolt, one end of the disc spring group is in contact with a nut or a nut at one end of the high-strength bolt, the other end of the disc spring group is in contact with the outer surface of the lug plate at the column end, and the high-strength bolt applies initial pre-pressure between the friction disc components through the disc spring group.
As a further preferred aspect of the present invention, the degree of the minimum slope angle of the variable slope surface is a, and the friction coefficient between the variable slope surfaces of the inner friction disk and the outer friction disk is b, then the conditions that need to be satisfied when the inner friction disk and the outer friction disk can be self-reset under the prepressing of the disc spring set are: tan a > b.
As a further preference of the invention, the structure also comprises two column end lug plate root end plates and a beam end lug plate root end plate, wherein the column end lug plate root end plate is connected to one end of the column end lug plate far away from the bolt hole, and the column end lug plate root end plate is welded at one end of the column end lug plate in a way of being vertical to the column end lug plate; the beam-end otic placode root end plate is connected in the one end that the bolt hole was kept away from to the beam-end otic placode, and beam-end otic placode root end plate perpendicular to beam-end otic placode welds in the one end of column end otic placode.
As a further preference of the invention, each pair of friction disc assemblies contains 5 high strength bolts, each high strength bolt exerting an initial pre-stress of F bolt The height of the top of the variable slope from the bottom of the variable slope is L, and the diameter of the bolt hole of the inner ring is R 1 The distance between the inner side wall of the outer ring bolt hole and the center of the friction disc is R 2 The distance from the outer side wall of the outer ring bolt hole to the center of the friction disc is R 3 The outer diameter of the friction disk is R 4 The lift angle of each slope surface at the outer diameter is theta 1 ，θ 2 ，θ 3 And theta 4 The central angle corresponding to a single slope surface is
The coefficient of friction between the slopes is mu, willThe friction disc is equally divided into a plurality of parts from inside to outside by the distance delta R, so that n friction areas can be formed, the radius of any friction area of the friction disc is R, and the starting torque of the friction-variable self-resetting damper is
As further preferred, the invention also comprises a column overhanging beam, a column overhanging beam end plate, a structural beam, a column end connecting high-strength bolt, a beam connecting high-strength bolt and a structural beam end plate; the column overhanging beam end plate is vertically connected to one end of the column overhanging beam, corresponding bolt holes are formed in the column overhanging beam end plate and the column end lug plate root end plate, and the column end lug plate root end plate and the column overhanging beam end plate are connected through a column end connecting high-strength bolt; the structure beam end plate is vertically connected to one end of the structure beam, corresponding bolt holes are formed in the structure beam end plate and the beam end lug plate root end plate, and the structure beam end plate and the beam end lug plate root end plate are connected through high-strength bolts.
In a further preferred embodiment of the present invention, the column-end ear plate and the beam-end ear plate are made of Q355 steel.
In a further preferred embodiment of the present invention, the inner friction disk and the outer friction disk are made of 45 steel or 40 chromium, which is the same material.
The invention has the following beneficial effects:
(1) the invention utilizes the characteristics of a novel friction disk structure to realize the variable friction energy consumption of the frame connecting node. The variable friction characteristic is stepless continuous change, and the slope surface of the friction disc can be designed according to the requirements of the frame structure connecting node under different earthquake conditions, so that different variable friction characteristics are realized.
(2) Compared with the traditional frame node, the rotary type friction-variable self-resetting node does not need larger restoring force, and can realize self-resetting by utilizing the pressure of elastic potential energy accumulated by the disc spring on the slope-variable surface. The butterfly spring used in the invention is widely applied in engineering, and has low cost, stable performance and good popularization.
(3) The rotary variable-friction self-resetting node is an assembly node and can be applied to beam column nodes of common frame structures. The rotary friction-variable self-resetting node energy consumption capacity and the node rigidity can be adjusted by using the combined parameters of friction disks, column end lug plates and disc springs with different specifications so as to match beam-column nodes of frame structures with different scales.
Drawings
FIG. 1 is a three-dimensional schematic view of a rotary friction-varying self-resetting node according to the present invention;
FIG. 2 is a schematic view of the disassembled structure of FIG. 1;
FIG. 3 is a schematic plan view of xoz of FIG. 1;
FIG. 4 is a schematic view of the yoz plane of FIG. 1;
FIG. 5 is a schematic xoy plan view of FIG. 1;
FIG. 6 is a three-dimensional schematic view of a beam-end ear plate;
FIG. 7 is a three-dimensional schematic view of a post-end ear plate;
FIG. 8 is a three-dimensional schematic view of an inner friction disk;
FIG. 9 is a three-dimensional schematic view of an outer friction disk;
FIG. 10 is a schematic view of a radial halving of the friction disk;
FIG. 11 is a schematic view of friction disc lift angle geometry calculations;
fig. 12 is a partially enlarged view of fig. 1.
Among them are: 1. a post-end ear plate; 2. a beam-end ear plate; 3. an inner friction disk; 4. an outer friction disc; 5. a disc spring set; 6. a high-strength bolt; 7. a column outrigger end plate; 8. the beam is connected with a high-strength bolt; 9. the column end is connected with a high-strength bolt; 10. a column end ear plate root end plate; 11. a column extension beam; 12. a beam end ear plate root end plate; 13. a structural beam end plate; 14. a structural beam.
Detailed Description
The present invention will be described in further detail with reference to the drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate orientations or positional relationships based on those shown in the drawings, only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second", etc. do not represent an important degree of the component, and thus, are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
As shown in fig. 1-12, a rotary type friction-variable self-resetting node comprises a beam-end lug plate 2, two column-end lug plates 1, a self-resetting damping mechanism and a plurality of high-strength bolts 6. As shown in fig. 1, the x direction of the coordinate axes in the drawing is the arrangement direction of the structural beam 14 or the column extension beam 11, the y direction is the connection direction of the high-strength bolt 6, z is the vertical direction, and the x, y and z axes intersect at the point O.
Column end otic placode 1 and beam-ends otic placode 2's shape is the same, and two parallel relative settings of column end otic placode 1, and some parallel settings of beam-ends otic placode 2 are between two column end otic placodes 1, and the setting direction of beam-ends otic placode 2 is opposite with the setting direction of column end otic placode 1. Corresponding bolt hole groups are arranged on the beam end ear plate 2 and the column end ear plate 1, each bolt hole group comprises a plurality of bolt holes, and each bolt hole group comprises a central hole and bolt holes on the periphery. The central hole of the bolt hole on the beam end ear plate 2 is a round hole, the bolt holes around the central hole are arc-shaped long round holes, the bolt holes on the column end ear plate 1 are round holes, and the high-strength bolt 6 penetrates through the corresponding bolt holes to sequentially connect one column end ear plate 1, one beam end ear plate 2 and the other column end ear plate 1; two column end otic placodes 1 and a beam-ends otic placode 2 form rotatable three-layer construction, and the column end otic placode 1 and the beam-ends otic placode 2 take place after relative rotation through restoring to the throne damping mechanism and consume energy.
The self-resetting damping mechanism comprises two pairs of friction disc assemblies and disc spring assemblies 5; each pair of friction disc components comprises an inner friction disc 3 and an outer friction disc 4, the opposite side surfaces of the inner friction disc 3 and the outer friction disc 4 are provided with a plurality of corresponding variable slope surfaces, and the variable slope surfaces of the inner friction disc 3 and the outer friction disc 4 are matched with each other in an initial state. The top and the bottom of the inner and the outer annular slope surfaces of the friction disk are the same, so that the slope surfaces of the inner and the outer friction disks 4 are variable slope surfaces, and variable friction is realized in the rotating process.
The friction disc assembly is arranged between the beam-end lug plate 2 and the column-end lug plate 1, the inner friction disc 3 is welded at the corresponding position of two sides of the beam-end lug plate 2, and the outer friction disc 4 is welded at the inner side of the two column-end lug plates 1, namely the inner side is the opposite side of the two column-end lug plates 1. And arc-shaped long round holes and round holes corresponding to the beam end lug plates 2 are formed in the two inner friction discs 3, and bolt holes corresponding to the column end lug plates 1 are formed in the outer friction discs 4. Each high-strength bolt 6 sequentially penetrates through a bolt hole of the column end lug plate 1, a bolt hole of the outer friction disc 4, an arc-shaped long circular hole or a circular hole of the inner friction disc 3, an arc-shaped long circular hole or a circular hole of the beam end lug plate 2, an arc-shaped long circular hole or a circular hole of the other inner friction disc 3, a bolt hole of the other outer friction disc 4 and a bolt hole of the other column end lug plate 1; the disc spring set 5 is sleeved on a bolt rod of the high-strength bolt 6, one end of the disc spring set 5 is in contact with a nut or a nut at one end of the high-strength bolt 6, the other end of the disc spring set 5 is in contact with the outer surface of the column end ear plate 1, and the high-strength bolt 6 applies initial pre-pressure between the friction disc assemblies through the disc spring set 5. The outer friction disc 4 and the inner friction disc 3 are matched with each other in an initial state, but are not connected with each other, and can rotate relative to each other for a certain angle in the use process.
The degree of the slope surface minimum lift angle of the variable slope surface is a, the friction coefficient between the slope surfaces of the inner friction disk 3 and the outer friction disk 4 is b, and the conditions which need to be met when the inner friction disk 3 and the outer friction disk 4 can be automatically reset under the prepressing of the disc spring set 5 are as follows: tan a > b. When the tangent value of the minimum rising angle of the variable slope surface is larger than the friction coefficient between the friction surfaces, the pair of friction disc assemblies can realize self-resetting under the pre-pressure of the disc spring assembly 5.
The high-strength bolts 6 are used for connecting the lug plates which are matched with the friction discs initially, and the number and the types of the bolts are comprehensively considered according to the design requirements of the nodes. The disc spring group formed by folding/involuting provides pre-pressure for the variable slope surface so that the variable slope surface is self-restored, and the type, the folding/involuting number and the mode of the disc springs can be selected according to the used high-strength bolt 6, the required rigidity deformation and the like. The disc spring group formed by overlapping is arranged at the outer side of the column end ear plate 1, and initial pre-pressure is applied by the high-strength bolt 6.
The structure is characterized by further comprising two column end lug plate root end plates 10 and a beam end lug plate root end plate 12, wherein the column end lug plate root end plate 10 is connected to one end, far away from the bolt hole, of the column end lug plate 1, and the column end lug plate root end plate 10 is welded to one end of the column end lug plate 1 in a manner of being perpendicular to the column end lug plate 1; the beam end lug plate root end plate 12 is connected to one end of the beam end lug plate 2 far away from the bolt hole, and the beam end lug plate root end plate 12 is perpendicular to the beam end lug plate 2 and is welded to one end of the column end lug plate 1. The column end ear plate 1 and the beam end ear plate 2 of the invention are convenient to be connected with other building structures.
The self-resetting node comprises 5 lug plates connected with a high-strength bolt 6, the height of the top of the variable slope from the slope bottom is L, and the pretightening force of the connecting bolt is F bolt The diameter of the inner ring bolt hole is R 1 The distance between the inner side wall of the outer ring bolt hole and the center of the friction disc is R 2 The distance from the outer side wall of the outer ring bolt hole to the center of the friction disc is R 3 The outer diameter of the friction disk is R 4 The lift angle of each slope surface at each outer diameter is theta 1 ，θ 2 ，θ 3 And theta 4 The central angle of the single slope surface is
The friction coefficient between the slope surfaces is mu, and the friction disk is equally divided into a plurality of parts from inside to outside by the distance delta R, so that n friction areas can be formed. The height L of the top of the slope from the bottom of the slope and the corresponding central angle of the single slope are
Radius range of friction disk [0, R]And the relationship between the lift angle theta of each slope at the external meridian is
To further complement the above solution, the relationship between the number n of friction areas and the radius range [0, R ] of the friction disk and the Δ R of the friction disk equally divided from inside to outside is
To further complement the above solution, the self-resetting node comprises 2 pairs of friction disks, the starting torque of which is M slip Corresponding frictional force F for each frictional area c The product of the radius R, the starting torque is about
The scheme is further supplemented, and when the delta R is close to 0, the calculation result is the accurate solution of the starting torque of the self-reset node
To further complement the above solution, the relation between the height L of the top of the slope from the bottom of the slope and the number n of the friction areas is used to obtain the starting torque from the reset node as
When the torque between the beam end lug plate 2 and the column end lug plate 1 is larger than M slip When the self-resetting friction damper is started, the self-resetting friction damper starts to work.
The structure comprises a column extending beam 11, a column extending beam end plate 7, a structural beam 14, a column end connecting high-strength bolt 9, a beam connecting high-strength bolt 8 and a structural beam end plate 13; the column overhanging beam end plate 7 is vertically connected to one end of a column overhanging beam 11, corresponding bolt holes are formed in the column overhanging beam end plate 7 and the column end lug plate root end plate 10, and the column end lug plate root end plate 10 and the column overhanging beam end plate 7 are connected through a column end connecting high-strength bolt 9; the structure beam end plate 13 is vertically connected to one end of the structure beam 14, corresponding bolt holes are formed in the structure beam end plate 13 and the beam end lug plate root end plate 12, and the structure beam end plate 13 and the beam end lug plate root end plate 12 are connected through the beam connecting high-strength bolt 8. The column end ear plate 1 is connected with the column extension beam 11 through an end plate at the root of the column end ear plate and a column extension beam end plate 7 by using a column end connecting high-strength bolt 9. The beam end ear plate 2 is connected with the beam end plate structure beam end plate 13 through the beam end ear plate root end plate 12 by using the beam connecting high-strength bolt 8, so that on-site assembly is convenient to realize.
The column end ear plate 1 and the beam end ear plate 2 are made of Q355 steel. Q355 is a low-alloy high-strength structural steel widely used in bridges, vehicles, ships, buildings, pressure vessels, special equipment and the like, wherein "Q" means yield strength, and 355 means that the yield strength of the steel is 355MPa, and the yield value of the steel is reduced along with the increase of the thickness of the material. The inner friction disc 3 and the outer friction disc 4 are made of 45 steel or 40 chromium, and the 45 steel is characterized by having higher strength and deformation resistance compared with the common A3 steel; 40 chromium is one of the most widely used structural alloy steels in the machine manufacturing industry. After quenching and tempering, the alloy has good comprehensive mechanical property, good low-temperature impact toughness and low notch sensitivity. The hardenability of the steel is good.
When the lower end part of the structural beam 14 is subjected to bending deformation under the action of the bending moment, the beam end lug plate 2 is driven to rotate, and then the two inner friction discs 3 are driven to rotate. The outer side of each pair of friction discs is provided with a disc spring group 5, each disc spring group 5 is composed of a plurality of disc springs, the disc spring groups 5 on one side of each high-strength bolt 6 are connected in parallel to form the disc spring groups 5 on one side of each friction disc, and the flattening deformation of each disc spring group 5 is within the allowed rotation angle range of the inner friction disc 4 and the outer friction disc 4, so that the connection safety of the damper is ensured. The inner friction disc 3 and the outer friction disc 4 rub against each other along the changing slope respectively under the action of the bolt prepressing force, and the disc spring set 5 generates elastic deformation under the action of the high-strength bolt 6 prepressing force to provide restoring force. The extent of the bolt oblong holes in the inner friction discs 3 limits the rotation angle of the inner friction discs 3 from exceeding the corresponding angle of the individual friction surfaces of the friction discs.
The slope friction disk is adopted to rub and consume energy, the self-reset node can realize nondestructive recovery under medium and small earthquakes, and has good self-reset capability under large earthquakes; meanwhile, the self-reset node has the characteristic of variable friction, and the friction force is sharply increased along with the increase of the rotation angle, so that the energy consumption capability under different earthquake conditions of medium and small earthquakes and major earthquakes is met. The invention utilizes the elastic potential energy accumulated by the disc spring to carry out self-resetting on the pressure generated by the slope-changing surface. The nondestructive recovery under medium and small earthquakes is ensured, and the recovery capability under large earthquakes is still good. Compared with self-reset materials of SMA wires and prestressed reinforcements, the butterfly spring used in the invention is widely applied in engineering, and has the advantages of low manufacturing cost, stable performance and good popularization. The rotary type friction-variable self-resetting node can be applied to common beam-column nodes, is simple in structural form and convenient to assemble, and can flexibly select parameters such as the diameter of a friction disc, the lead angle of a variable slope surface, the number of bolts, the shape parameters of a column end lug plate 1, the specification of a disc spring, the number of overlapping/involuting and the like according to the design requirements of the node to adjust the energy consumption capacity and the rigidity of the self-resetting node. The self-reset node can realize energy consumption and nondestructive recovery of the structure under medium and small earthquakes on the performance by virtue of the variable friction and resettable advantages of the self-reset node, and has good self-reset capability under large earthquakes; meanwhile, the self-resetting node is simple in structure and applicability, convenient to construct and install, low in manufacturing cost and wide in engineering application prospect.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (8)
1. The utility model provides a rotary type becomes friction from restoring to throne node which characterized in that: the self-resetting damping device comprises a beam end lug plate (2), two column end lug plates (1), a self-resetting damping mechanism and a plurality of high-strength bolts (6);
the two column end ear plates (1) are arranged in parallel, the beam end ear plate (2) is arranged between the two column end ear plates (1), a plurality of corresponding bolt holes are formed in the beam end ear plate (2) and the column end ear plate (1), a center hole of each bolt hole in the beam end ear plate (2) is a round hole, bolt holes around the center hole are arc-shaped long round holes, bolt holes in the column end ear plates (1) are round holes, and a high-strength bolt (6) penetrates through the corresponding bolt holes to sequentially connect one column end ear plate (1), one beam end ear plate (2) and the other column end ear plate (1); two column end otic placodes (1) and a roof beam end otic placode (2) form rotatable three layer construction, and the column end otic placode (1) and roof beam end otic placode (2) take place after relative rotation through restoring to the throne damping mechanism from the position and consume energy.
2. A rotary variable friction self-resetting node according to claim 1, wherein: the self-resetting damping mechanism comprises two pairs of friction disc assemblies and disc spring assemblies (5); each pair of friction disc components comprises an inner friction disc (3) and an outer friction disc (4), a plurality of corresponding slope changing surfaces are arranged on the surface of one side, opposite to the inner friction disc (3) and the outer friction disc (4), of the inner friction disc (3) and the slope changing surfaces of the outer friction disc (4) can be matched with each other, the friction disc components are arranged between the beam end lug plate (2) and the column end lug plate (1), the inner friction discs (3) are welded on two sides of the beam end lug plate (2), the outer friction discs (4) are welded on the inner side of the column end lug plate (1), arc-shaped long round holes and round holes corresponding to the beam end lug plate (2) are formed in the inner friction discs (3), bolt holes corresponding to the column end lug plate (1) are formed in the outer friction discs (4), and high-strength bolts (6) sequentially penetrate through the bolt holes of the column end lug plate (1), the bolt holes of the outer friction disc (4), and the arc-shaped long round holes or round holes of the inner friction disc (3), An arc-shaped long circular hole or a circular hole of the beam end ear plate (2), an arc-shaped long circular hole or a circular hole of the other inner friction disc (3), a bolt hole of the other outer friction disc (4) and a bolt hole of the other column end ear plate (1); the disc spring set (5) is sleeved on a bolt rod of the high-strength bolt (6), one end of the disc spring set (5) is in contact with a nut or a nut at one end of the high-strength bolt (6), the other end of the disc spring set (5) is in contact with the outer surface of the column end lug plate (1), and the high-strength bolt (6) applies initial pre-pressure between the friction disc assemblies through the disc spring set (5).
3. A rotary variable friction self-resetting node according to claim 2, wherein: the degree of the minimum slope angle of the variable slope surface is a, the friction coefficient between the variable slope surfaces of the inner friction disc (3) and the outer friction disc (4) is b, and the conditions which need to be met when the inner friction disc (3) and the outer friction disc (4) can be automatically reset under the prepressing of the disc spring set (5) are as follows: tan a > b.
4. A rotary variable friction self-resetting node according to claim 1, wherein: the bolt hole structure is characterized by further comprising two column end lug plate root end plates (10) and a beam end lug plate root end plate (12), wherein the column end lug plate root end plate (10) is connected to one end, far away from the bolt hole, of the column end lug plate (1), and the column end lug plate root end plate (10) is welded to one end of the column end lug plate (1) in a manner of being perpendicular to the column end lug plate (1); the beam end lug plate root end plate (12) is connected to one end, far away from the bolt hole, of the beam end lug plate (2), and the beam end lug plate root end plate (12) is perpendicular to the beam end lug plate (2) and is welded to one end of the column end lug plate (1).
5. A rotary variable friction self-resetting node according to claim 2, wherein: each pair of friction disc assemblies comprises 5 high-strength bolts (6), and each high-strength bolt (6) exerts initial pre-pressure F bolt The height of the top of the variable slope from the bottom of the slope is L, and the diameter of the inner ring bolt hole is R 1 The distance from the inner side wall of the bolt hole of the outer ring to the center of the friction disc is R 2 The distance from the outer side wall of the outer ring bolt hole to the center of the friction disc is R 3 The outer diameter of the friction disk is R 4 The lift angle of each slope surface at the outer diameter is theta 1 ，θ 2 ，θ 3 And theta 4 The central angle of the single slope surface is
The friction coefficient between the slope surfaces is mu, the friction disc is equally divided into a plurality of parts by the distance delta R from inside to outside, so that n friction areas can be formed, the radius of any friction area of the friction disc is R, and the starting torque of the friction-variable self-resetting damper is
6. A rotary variable friction self-resetting node according to claim 4, wherein: the structure is characterized by further comprising a column overhanging beam (11), a column overhanging beam end plate (7), a structural beam (14), a column end connecting high-strength bolt (9), a beam connecting high-strength bolt (8) and a structural beam end plate (13); the column overhanging beam end plate (7) is vertically connected to one end of a column overhanging beam (11), the column overhanging beam end plate (7) and the column end lug plate root end plate (10) are provided with corresponding bolt holes, and the column end lug plate root end plate (10) and the column overhanging beam end plate (7) are connected through a column end connecting high-strength bolt (9); the structural beam end plate (13) is vertically connected to one end of a structural beam (14), corresponding bolt holes are formed in the structural beam end plate (13) and the beam end lug plate root end plate (12), and the structural beam end plate (13) is connected with the beam end lug plate root end plate (12) through a beam connecting high-strength bolt (8).
7. A rotary variable friction self-resetting node according to claim 1, wherein: the column end ear plate (1) and the beam end ear plate (2) are made of Q355 steel.
8. A rotary friction-change self-resetting node according to claim 2, wherein: the inner friction disc (3) and the outer friction disc (4) are made of the same material and are made of 45 steel or 40 chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210423234.1A CN114790847B (en) | 2022-04-21 | 2022-04-21 | Rotary friction-variable self-resetting node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210423234.1A CN114790847B (en) | 2022-04-21 | 2022-04-21 | Rotary friction-variable self-resetting node |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114790847A true CN114790847A (en) | 2022-07-26 |
| CN114790847B CN114790847B (en) | 2023-10-13 |
Family
ID=82461218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210423234.1A Active CN114790847B (en) | 2022-04-21 | 2022-04-21 | Rotary friction-variable self-resetting node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114790847B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833144A (en) * | 2021-09-29 | 2021-12-24 | 东南大学 | Friction energy consumption rotation self-reset node device |
| CN115949149A (en) * | 2022-12-12 | 2023-04-11 | 哈尔滨工业大学 | Disc spring-SMA rod combined bending-resistant energy-consuming self-resetting steel beam column node for pin joint center support |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894738A (en) * | 2019-12-23 | 2020-03-20 | 西安建筑科技大学 | Disc-shaped tooth-shaped self-resetting device and application thereof |
| CN111395567A (en) * | 2020-04-24 | 2020-07-10 | 广州大学 | Rotary friction energy dissipater |
| CN112538898A (en) * | 2020-12-19 | 2021-03-23 | 兰州理工大学 | Self-resetting shearing-constraint buckling damage controllable assembly type beam-column joint |
| CN112554337A (en) * | 2020-12-19 | 2021-03-26 | 兰州理工大学 | Self-reset type rigidity self-adaptive control assembly type beam-column node |
| CN214169536U (en) * | 2020-11-25 | 2021-09-10 | 中南大学 | Rotary friction damper |
| CN113530333A (en) * | 2021-07-20 | 2021-10-22 | 福建工程学院 | Assembled friction type energy-consumption connecting beam column node |
| CN113700363A (en) * | 2021-08-01 | 2021-11-26 | 北京工业大学 | Assembled easy-to-reset rotating energy consumption node |
| CN113833144A (en) * | 2021-09-29 | 2021-12-24 | 东南大学 | Friction energy consumption rotation self-reset node device |
-
2022
- 2022-04-21 CN CN202210423234.1A patent/CN114790847B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894738A (en) * | 2019-12-23 | 2020-03-20 | 西安建筑科技大学 | Disc-shaped tooth-shaped self-resetting device and application thereof |
| CN111395567A (en) * | 2020-04-24 | 2020-07-10 | 广州大学 | Rotary friction energy dissipater |
| CN214169536U (en) * | 2020-11-25 | 2021-09-10 | 中南大学 | Rotary friction damper |
| CN112538898A (en) * | 2020-12-19 | 2021-03-23 | 兰州理工大学 | Self-resetting shearing-constraint buckling damage controllable assembly type beam-column joint |
| CN112554337A (en) * | 2020-12-19 | 2021-03-26 | 兰州理工大学 | Self-reset type rigidity self-adaptive control assembly type beam-column node |
| CN113530333A (en) * | 2021-07-20 | 2021-10-22 | 福建工程学院 | Assembled friction type energy-consumption connecting beam column node |
| CN113700363A (en) * | 2021-08-01 | 2021-11-26 | 北京工业大学 | Assembled easy-to-reset rotating energy consumption node |
| CN113833144A (en) * | 2021-09-29 | 2021-12-24 | 东南大学 | Friction energy consumption rotation self-reset node device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833144A (en) * | 2021-09-29 | 2021-12-24 | 东南大学 | Friction energy consumption rotation self-reset node device |
| CN113833144B (en) * | 2021-09-29 | 2023-05-16 | 东南大学 | Friction energy consumption rotary self-resetting node device |
| CN115949149A (en) * | 2022-12-12 | 2023-04-11 | 哈尔滨工业大学 | Disc spring-SMA rod combined bending-resistant energy-consuming self-resetting steel beam column node for pin joint center support |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114790847B (en) | 2023-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114790847A (en) | Rotary type variable friction self-resetting node | |
| CN111188425B (en) | Disc spring self-resetting node connecting device | |
| CN105155719B (en) | Angle-adjustable fan-shaped lead viscoelastic corner damper | |
| CN109881806B (en) | Self-resetting ripple friction-changing damper | |
| CN113700363A (en) | Assembled easy-to-reset rotating energy consumption node | |
| CN110792030B (en) | Bridge damper based on metal rubber and working method thereof | |
| CN102797372A (en) | Seismic isolation device and tsunami protective device for nuclear power plant and manufacturing method thereof | |
| CN113700362B (en) | Based on SMA assembled rotation power consumption node that easily resets | |
| CN112376696B (en) | Building node with multiple energy consumption and self-resetting characteristics and assembling method thereof | |
| CN106049952B (en) | A kind of end has the buckling control support of duplex pyramid type energy consumption unit | |
| CN210685042U (en) | Three-dimensional shock insulation/vibration isolation device with limiting function | |
| CN205088812U (en) | Angle-adjustable fan-shaped lead viscoelastic corner damper | |
| CN114790848B (en) | Connecting rod mechanism type variable friction self-resetting damper | |
| CN110629898B (en) | Column bottom damper and corrugated web semi-wrapped column based on same | |
| CN105839973A (en) | Buckling control support with end provided with staggered pyramid type energy consumption unit | |
| CN209760484U (en) | Self-resetting corrugated variable-friction damper | |
| CN109653392A (en) | A kind of suspension column energy-consumption damper | |
| CN113216396A (en) | Self-resetting beam column node device for building structure | |
| JPH0262670B2 (en) | ||
| CN210508600U (en) | Self-reset wall piece type rotating friction damper | |
| CN209686627U (en) | A kind of suspension column energy-consumption damper | |
| CN102819219A (en) | Intelligent motion control method for prolonging service life of slewing bearing | |
| JPH01318629A (en) | Friction damper | |
| CN105735721A (en) | High-strength large deformation C-shaped thin shell self-resetting structure | |
| CN112176854A (en) | Horizontal multidimensional response amplification type shearing energy dissipation and damping device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |