CN116180925A - Assembly type self-resetting viscoelastic anti-seismic toughness improving system and method - Google Patents
Assembly type self-resetting viscoelastic anti-seismic toughness improving system and method Download PDFInfo
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- CN116180925A CN116180925A CN202310259452.0A CN202310259452A CN116180925A CN 116180925 A CN116180925 A CN 116180925A CN 202310259452 A CN202310259452 A CN 202310259452A CN 116180925 A CN116180925 A CN 116180925A
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- 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
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- 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
- E04B1/19—Three-dimensional framework structures
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- 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
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
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- 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
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5831—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
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- 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
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- 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
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- 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
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- 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
- E04H9/025—Structures with concrete columns
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Abstract
The invention discloses an assembled self-resetting viscoelastic anti-seismic toughness lifting system and method, comprising an outsourcing steel plate assembly, a viscoelastic damper, a diagonal bracing steel plate and three SMA self-resetting damping devices; the viscoelastic damper is connected with the beam or the column through an outer wrapping steel plate component, and two ends of the SMA self-healing damping device are respectively hinged with the viscoelastic damper and the node steel plate; the SMA self-resetting damper and the viscoelastic damper jointly deform to consume energy and absorb shock in small earthquake; when a large earthquake occurs, the SMA self-resetting damper reaches a limit value, and the vibration is damped and energy is consumed mainly by virtue of the shear deformation of the viscoelastic damper; the SMA material in the composite damper gives the device a certain self-resetting capability, changes the structural design from 'ductility' to 'toughness', and all parts are connected in an assembled mode, so that the local replacement of damaged components after earthquake is facilitated, and the design goal is increased from 'life safety' to 'performance recovery'.
Description
Technical Field
The invention relates to the technical field of energy consumption and shock absorption, in particular to an assembled self-resetting viscoelastic anti-seismic toughness improving system and method.
Background
The frame structure has the advantages of flexible layout of the building plane, high space utilization rate and easy satisfaction of the use requirement of the building; the cast-in-situ frame structure has good rigidity and integrity, and the plasticity of the concrete ensures that the frame structure can be poured into different cross-sectional shapes to meet the use requirements of the building; the development time of the frame structure is longer, the construction process is mature, and the frame structure is the building structure with the largest quantity and the widest application in the current structure. But the stress concentration of the frame structure at the node is obvious, the lateral rigidity of the structure is small, large horizontal displacement is easy to generate under the action of earthquake, and the structure is seriously damaged. Therefore, how to improve the damping and energy consumption capability, the self-resetting and repeated energy consumption performance and the local damage replaceability of the damping device of the beam column node of the concrete frame structure under the earthquake action is an urgent problem to be solved.
The viscoelastic damper is a typical passive energy dissipation and shock absorption device, and the viscoelastic material filled between the steel plates can generate shear hysteresis energy consumption under the action of earthquake, so that the purposes of improving structural damping and reducing structural response are achieved. The damping device has the advantages of simple structure, low manufacturing cost, good damping effect and the like, and is widely applied to the structural damping field. However, in the long-term service process of the viscoelastic damper, because the rubber is fatigued for many times, debonding can occur in the bonding layer between the metal and the rubber, pores or cracks can exist in the rubber, and different types of defects appear in the rubber, so that the rubber fails.
The shape memory alloy (Shape Memory Alloys, SMA) is a novel intelligent material, has excellent characteristics of shape memory effect, super elasticity, high damping and the like, and can meet the requirement of the novel damper on the recovery deformation capability. The SMA damper formed by the SMA bar and the movable steel plate provides a great degree of restorability for the device, also provides toughness for the structure on the basis of damping and energy consumption, and greatly prolongs the service life of the damping device. However, the self-resetting characteristic of the SMA rod is replaced by sacrificing the energy consumption performance to a certain extent, so that the SMA damper loses the energy consumption capability to a certain extent.
And the SMA damper and the viscoelastic damper are reasonably arranged at the same node, so that the two dampers are mutually coupled to form an efficient device which coordinates each other and absorbs the energy consumption together, and the damage influence of the earthquake on the beam column node is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an assembled self-resetting viscoelastic anti-seismic toughness lifting system and method, which consume energy and resist seismic by working together with a beam body at the lower side of a concrete frame, thereby greatly reducing the damage influence of earthquake on beam column nodes.
The invention is realized by the following technical scheme:
an assembled self-resetting viscoelastic anti-seismic toughness lifting system comprises at least one group of anti-seismic toughening components, wherein the anti-seismic toughening components comprise an outsourcing steel plate component, a viscoelastic damper, a diagonal bracing steel plate and three SMA self-resetting damping devices;
one end of each of the two SMA self-resetting dampers is connected with the two outer-wrapping steel plate components through a viscoelastic damper, one end of the other SMA self-resetting damper is hinged with the inclined strut steel plate, the other end of each of the three SMA self-resetting dampers is hinged with the node, the other end of the inclined strut steel plate is hinged with the other outer-wrapping steel plate component, the two outer-wrapping steel plate components connected with the viscoelastic damper are wrapped on the upper adjacent upper beam body and column body, the outer-wrapping steel plate component connected with the inclined strut steel plate is arranged on the lower beam body, and viscoelastic material blocks are filled between the outer-wrapping steel plate components and the beam column body;
the SMA self-resetting damper comprises an outer steel plate, an inner steel plate and an H-shaped sliding block plate;
the inner steel plate is provided with two sliding grooves along the displacement direction at intervals, the H-shaped sliding block plates are transversely arranged in the sliding grooves and can move along the sliding grooves, the outer steel plate is connected with the two H-shaped sliding block plates through SMA materials, and when the H-shaped sliding block plates move along the sliding grooves, the SMA materials deform to consume energy.
Preferably, the beam column comprises two groups of anti-seismic toughening components which are symmetrically distributed along the center of the beam column body, and inclined strut steel plates of the two groups of anti-seismic toughening components are hinged with the same outer wrapping steel plate component.
Preferably, the viscoelastic damper comprises a first connecting steel plate, a second connecting steel plate, a chute fixing steel plate and a sliding device;
the first connecting steel plate is fixed on the outer wall of the wrapping steel plate assembly, the second connecting steel plate is arranged in parallel on the outer side of the first connecting steel plate, a viscoelastic material is adhered between the first connecting steel plate and the second connecting steel plate, the two sliding devices are arranged on two sides of the second connecting steel plate in parallel and symmetrically, the two sliding devices are arranged along the axial direction of the beam body or the column body, one end of the sliding groove fixing steel plate is pressed on the sliding device in a pressing mode, and the other end of the sliding groove fixing steel plate is connected with the second connecting steel plate.
Preferably, the sliding device comprises a ball chute and a plurality of linearly arranged balls embedded in the ball chute, the ball chute is fixed on the second connecting steel plate, and the chute fixing steel plate is pressed on the balls.
Preferably, an X-shaped steel plate is arranged on the second connecting steel plate, and a second hinging seat is welded at the center of the X-shaped steel plate.
Preferably, a first node steel plate is arranged between the three SMA self-resetting dampers, the ends of the three SMA self-resetting dampers are respectively connected with the first node steel plate in a rotating way, and a plurality of shaft holes are uniformly distributed on the circumference of the first node steel plate.
Preferably, the both sides symmetry of interior steel sheet is provided with outer steel sheet, and the both ends of H type slider board transversely stretch out the both sides of spout, and one side that outer steel sheet is close to interior steel sheet is provided with two fixed plates, and two fixed plates are located two H type slider boards one side that is close to each other respectively, and a plurality of SMA rod are located between two fixed plates, and the both ends of SMA material pass fixed plate and the tip and the nut connection of H type slider board in proper order.
Preferably, the two H-shaped sliding block plates are respectively abutted with one ends of the two sliding grooves, which are close to each other.
Preferably, the outer-covered steel plate assembly comprises a hollow pipe formed by sequentially assembling a plurality of steel plates end to end, the inner wall of each steel plate is provided with a groove for bonding the viscoelastic cushion, one side of the viscoelastic cushion is bonded in the groove, the other side of the viscoelastic cushion protrudes out of the groove and covers the inner wall of each steel plate, and the viscoelastic cushion of each steel plate is connected end to end and forms an annular closed structure.
A method for an assembled self-resetting viscoelastic anti-seismic toughness improving system,
when the concrete frame structure is subjected to small vibration and wind vibration, the SMA material of the SMA self-resetting damper generates tensile deformation to consume energy, and meanwhile, the viscoelastic material in the viscoelastic damper generates shear deformation to absorb vibration and consume energy;
when the concrete frame node receives the major earthquake effect, the SMA attenuator tensile deformation consumes energy, provides self-reset ability for the antidetonation system simultaneously, and the viscoelastic material in the viscoelastic attenuator takes place shear deformation and consumes energy shock attenuation, and the viscoelastic material piece between beam column and the outsourcing steel sheet subassembly takes place to compress and shear deformation jointly and consumes energy shock attenuation simultaneously, and the outsourcing steel sheet subassembly plays the hoop effect to the beam column.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the assembled self-resetting viscoelastic anti-seismic toughness lifting system, the viscoelastic damper and the diagonal bracing steel plates are connected with the beam columns of the concrete frame, so that energy of beam column joints under an earthquake is consumed as much as possible, a part of energy is transferred to the middle part of a beam body of the next layer through the diagonal bracing steel plates, the device and the beam body at the lower side of the concrete frame work together to consume energy and resist vibration, the damage influence of the earthquake on the beam column joints is greatly reduced, the earthquake energy is transferred to beam column areas, the anti-seismic performance of the frame is enhanced, the self-resetting performance of the joints is improved, the whole system has good damping effect in small earthquake and large earthquake, the self-resetting damping damper can provide larger elastic recovery capability in operation, the earthquake-repairing performance of the joints is guaranteed, the anti-seismic design requirement and the structural ' toughness ' performance of strong joints and weak components ' are guaranteed, in addition, as the structural device is assembled, the damage of a certain part can be quickly repaired to the set-up service performance, and the site installation and replacement are convenient and rapid in production and development.
Further, when the concrete frame node is subjected to small shock and wind vibration, the SMA damper generates tensile deformation to provide self-resetting capability, and the viscoelastic material in the viscoelastic damper generates shear displacement deformation to absorb shock, so that the dynamic response of the frame node is reduced;
further, when the concrete frame node receives the major shock effect, the SMA rod receives tensile deformation, but because the protection draw-in groove limit for interior steel sheet is long, the SMA attenuator can only extend the power consumption in certain within range, guarantees that it can not surpass from reset ability limit value. The viscoelastic material in the viscoelastic damper is subjected to large-amplitude shear displacement deformation to consume energy and absorb shock, and the viscoelastic material outside the beam column body is also subjected to extrusion or shear load, so that the deformation is jointly involved in energy consumption.
Drawings
FIG. 1 is a front elevational view of the structure of the fabricated self-resetting viscoelastic-SMA seismic system of the present invention;
FIG. 2 is a schematic view of a beam-column joint of the fabricated self-resetting viscoelastic-SMA seismic system of the present invention;
FIG. 3 is a front view of the lower side rail body portion of FIG. 1;
FIG. 4 is a top view of the present encased steel plate assembly of FIG. 1 and a viscoelastic damper;
FIG. 5 is an exploded view of the encased steel plate assembly and viscoelastic damper of FIG. 1;
FIG. 6 is a schematic view of a viscoelastic cushion in the clad steel plate assembly of FIG. 1;
FIG. 7 is a schematic view of the interior of the clad steel plate assembly of FIG. 1;
FIG. 8 is a schematic diagram of the structure of the SMA self-healing damper of FIG. 1;
FIG. 9 is a front view of the SMA self-healing damper of FIG. 1;
FIG. 10 is a schematic view of the structure of the beam column cladding steel plate and the viscoelastic damper of FIG. 1;
FIG. 11 is a schematic view of the lower sill pillar outer panel assembly of the present invention of FIG. 1;
FIG. 12 is an exploded view of the beam column cladding steel plate assembly and viscoelastic damper of FIG. 1.
In the figure: 1 a viscoelastic damper, 2SMA self-resetting damper, 3 a first node steel plate, 4 a second node steel plate, 5 a diagonal bracing steel plate, 6 a first hinge seat, 7 an outer wrapping steel plate assembly, 8 a viscoelastic cushion, 9 an outer wrapping steel plate I, 10 an outer wrapping steel plate II, 11 a first connecting steel plate, 12 a viscoelastic material, 13 a second connecting steel plate, 14X-shaped steel plates, 15 a second hinge seat, 16 ball chute fixing steel plates, 17 bolt cushion blocks, 18 bolts, 19 nuts, 20 outer steel plates, 21H-shaped slider plates, 22SMA rods, 23 fixing nuts, 24 inner steel plates, 25 balls, 26 bolts, 27 outer wrapping steel plates III, 28 outer wrapping steel plates IV, 29 ball chute.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, which illustrate but do not limit the invention.
Referring to fig. 1-12, an assembled self-resetting viscoelastic vibration-resistant toughness lifting system comprises two groups of symmetrically arranged vibration-resistant toughening components, wherein the vibration-resistant toughening components comprise an outer steel plate component 7, a viscoelastic damper 1, a diagonal bracing steel plate 5 and three SMA self-resetting damping devices 2.
One end of each of the two SMA self-resetting dampers is connected with one of the outer-wrapping steel plate assemblies 7 through the viscoelastic damper 1, one end of the other SMA self-resetting damper 2 is hinged with the diagonal bracing steel plate 5, the other ends of the three SMA self-resetting dampers are respectively hinged with the first connecting steel plate, the other ends of the diagonal bracing steel plate 5 are hinged with the outer-wrapping steel plate assemblies 7, three wrapping steel plates are wrapped on three continuous beam columns, and viscoelastic material blocks are filled between the outer-wrapping steel plate assemblies 7 and the beam columns.
Referring to fig. 8 and 9, the SMA self-resetting damper 2 absorbs energy by stretching SMA rods and comprises an outer steel plate 20, an inner steel plate 24, an H-shaped sliding block plate 21 and SMA rods 22;
the two outer steel plates are symmetrically arranged on the two sides of the inner steel plate 24 along the axial direction of the inner steel plate 24, two sliding grooves are formed in the inner steel plate 24 at intervals along the displacement direction, the H-shaped sliding block plates 21 are transversely arranged in the sliding grooves and can move along the sliding grooves, two ends of the H-shaped sliding block plates 21 extend out of the sliding grooves respectively, the two H-shaped sliding block plates 21 are abutted to one ends of the two sliding grooves, which are close to each other, of the outer steel plate 20, two fixing plates are arranged on one side, which is close to the inner steel plate 24, of the fixing plates, the fixing plates are located on one side, which is close to the two H-shaped sliding block plates, of each other, a plurality of SMA bars 22 are located between the two fixing plates, reserved holes penetrating through the SMA bars 22 are formed in the ends of the fixing plates and the H-shaped sliding block plates, the two ends of the SMA bars 22 sequentially penetrate through the fixing plates and are connected with nuts 23, and the nuts 23 are pressed against the ends 21 of the H-shaped sliding blocks.
In this embodiment, a plurality of SMA rods 22 are disposed on two sides of the inner steel plate, the SMA rods 22 on two sides are symmetrically disposed, and scale marks are disposed at threaded ends of the SMA rods 22 for checking the pretension, and the SMA rods 22 can also be replaced by SMA wires.
The ends of two outer steel plates at one end of the SMA self-healing damper 2 are connected through a rotating shaft, the outer steel plates of the three SMA self-healing dampers 2 are hinged with a first node steel plate 3 through the rotating shaft, and in the embodiment, the first node steel plate 3 is a round steel plate; the inner steel plate end parts of the two SMA self-resetting dampers 2 are hinged with the viscoelastic damper 1, the inner steel plate end parts of the other SMA self-resetting dampers 2 are rotatably connected with a second node steel plate 4, and the second node steel plate 4 is rotatably connected with one end of the diagonal bracing steel plate 5.
Referring to fig. 4-7, the steel plate package 7 comprises a rectangular hollow tube formed by assembling two steel plates ii 10 and two steel plates iii and iii, wherein the inner wall of each steel plate is provided with a groove for bonding a viscoelastic cushion, one side of the viscoelastic cushion is bonded in the groove, the other side protrudes out of the groove and covers the whole inner wall, the viscoelastic cushions of each steel plate are connected end to end and form an annular closed structure, the steel plate package is wrapped on the beam column, and the viscoelastic cushion is positioned between the corresponding side walls of each steel plate and the beam column.
In this embodiment, the structure of the outsourcing steel sheet I9 and the structure of the outsourcing steel sheet III of 27 are the same and vertically parallel arrangement, and two outsourcing steel sheets II 10 level parallel arrangement, the both sides of outsourcing steel sheet I9 are formed with the first connecting plate that extends to outsourcing steel sheet II 10 direction, and the both ends of outsourcing steel sheet II 10 are bent and are formed with the second connecting plate, and first connecting plate and second connecting plate are parallel to each other and connect through bolt 18 and nut, still are provided with bolt cushion 17 on the bolt 18.
Referring to fig. 10 and 12, the viscoelastic damper comprises a first connecting steel plate 11, a second connecting steel plate 13, a chute fixing steel plate 16 and a ball chute 29, wherein two sides of the first connecting steel plate 11 are respectively fixed on the outer wall of a 27 wrapping steel plate iii of the outer wrapping steel plate assembly 7 through a plurality of bolts, the second connecting steel plate 13 is arranged on the outer side of the first connecting steel plate 11 in parallel, a viscoelastic material 12 is adhered between the first connecting steel plate 11 and the second connecting steel plate 13, the viscoelastic material 12 is of a sheet-shaped structure and covers the side wall of the second connecting steel plate 13, an X-shaped steel plate 14 is welded on the outer side wall of the second connecting steel plate 13, a second hinging seat 15 is welded at the center of the X-shaped steel plate 14, two ball chutes 29 are arranged on two sides of the second connecting steel plate 13 in parallel and symmetrical mode, a plurality of balls are embedded in the ball chute 29, the ball chute 29 is arranged along the axial direction of a beam, the cross section of the chute fixing steel plate 16 is of a C-shaped structure, the chute fixing steel plate 16 is arranged in parallel to the ball chute 29, one end of the chute fixing steel plate 16 is pressed on the chute 29, the other end is provided with a connecting plate, and the connecting plate is pressed on the connecting plate through a plurality of bolts 26 at intervals between the edges of the second steel plates 13.
Referring to fig. 11, one end of the diagonal bracing steel plate 5 is hinged to the end of the inner steel plate 24 of the SMA self-resetting damper through a second node steel plate 4, the other end of the diagonal bracing steel plate 5 is connected with the outer wrapping steel plate assembly 7 through a first hinge seat 6, and the first hinge seat 6 is welded to the center of the side wall of the outer wrapping steel plate ii.
The viscoelastic damper 1, the SMA self-resetting damper 2, the first connecting steel plate 3, the second connecting steel plate 4, the inclined strut steel plate 5 and the lower side beam body wrapping steel plate component are connected by bolt rods, the diameters of the bolt rods can be set between 20 mm and 25mm according to the situation, in order to ensure that the two ends of the SMA self-resetting damper 2 can rotate stably and do not mutually block the viscoelastic damper and the opposite side SMA self-resetting damper on the inclined strut steel plate, the steel plates at the two ends of the SMA self-resetting damper are set to be circular arcs with the diameters of about 60mm, and in order to ensure that the SMA bar 22 does not contact with the outer steel plate 20 in the elongation deformation process, the outer steel plate of the SMA damper is set to be a variable section at a certain distance of a hinge point, so that the device is not blocked, and the connection strength of the hinge point is not reduced; the fixing bolts on the outer wrapping steel plate assembly are arranged at equal intervals to avoid overlarge stress concentration.
The spacing distance between the outer steel plate 20 and the inner steel plate 24 is set between 30mm and 40mm according to the requirement, so that the arrangement of the SMA bar 22 and the installation of the fixing nut 23 are facilitated, and the inner steel plate and the outer steel plate are prevented from collision in the working state. The spacing distance between the vertical plates at the two sides of the H-shaped sliding block plate is set between 24mm and 30mm according to the requirement, so that the H-shaped sliding block plate and the inner steel plate 24 are prevented from being damaged by friction when the SMA damper works. The length of the inner steel plate chute is designed according to 6% -8% of the length of the arranged SMA bar 22, so that the restorability of the SMA bar 22 is ensured.
The earthquake-resistant method of the assembled self-resetting viscoelastic earthquake-resistant toughness improving system provided by the invention is described in detail below.
Referring to fig. 1 and 2, the assembled self-resetting viscoelastic vibration-resistant toughness lifting system comprises two groups of vibration-resistant toughening components which are symmetrically arranged on a rectangular beam column body, wherein each group of vibration-resistant toughening components comprises three steel plate outsourcing components 7, two viscoelastic dampers 1 and three SMA self-resetting damping devices.
Before assembly, according to design parameters, forms and loaded characteristics of the assembled concrete frame nodes, the size of damping force required by the assembled viscoelastic damper and the SMA self-resetting damping device, the width and thickness of the viscoelastic material, the arrangement positions and the angles among the dampers are determined, and different supporting damping forces are realized for different nodes under different conditions by selecting the size of the viscoelastic material and the length of the SMA bar.
Two viscoelastic dampers 1 are fixed respectively on the lateral wall of two outsourcing steel sheet subassemblies 7, and two outsourcing steel sheet subassemblies 7 are assembled on two adjacent roof beam bodies and cylinder through the bolt, that is to say, one outsourcing steel sheet subassembly 7 is installed on the upper roof beam body, and another outsourcing steel sheet subassembly 7 is installed on adjacent cylinder to the distance of the connected node of two steel sheet subassemblies 7 and two adjacent roof beams equals, and last outsourcing steel sheet group sets up the central point of the lower roof beam body.
The circumference equipartition has a plurality of shaft holes on the first node steel sheet articulates, three SMA is from the one end of restoring damper and is articulated with first node steel sheet through the shaft hole, wherein two SMA are from the other end of restoring damper and the second articulated seat on the X shaped steel board of viscoelastic damper are connected, can make viscoelastic material can be even receive the shearing load, and two SMA are from the both sides of restoring damper symmetric distribution in the bracing steel sheet below, make two SMA equal from the damping effect of restoring damper, last SMA is from the other end of restoring damper and is connected with the one end of bracing steel sheet through the second node steel sheet, the other end of bracing steel sheet is connected with the first articulated seat 6 on the outsourcing steel sheet of the lower beam body, in this embodiment, two bracing steel sheet distributions of two sets of anti-seismic toughening components are articulated with the outsourcing steel sheet subassembly of the lower beam body.
When the concrete frame structure is subjected to small vibration and wind vibration, the system transmits dynamic loads received at beam-column joints to each energy-consumption damping device and transmits partial loads to the lower side beam body, so that the loads at the beam-column joints are reduced, the damage of the beam-column joints is reduced, the anti-vibration requirements of strong joints and weak components are met, the SMA bars of the SMA self-healing damping damper are subjected to tensile deformation and consume energy, the viscoelastic materials in the viscoelastic damper are subjected to shear deformation and mainly perform damping and energy consumption, and the two cooperate to greatly reduce the dynamic response and residual deformation of the frame, and the anti-vibration toughness of the structure is improved;
when the concrete frame node is subjected to the action of a large earthquake, the bar of the SMA self-resetting damper stretches and deforms, so that the SMA bar 22 is prevented from exceeding the resettable deformation, the inner steel plate slide groove enables the SMA bar to extend and consume energy only in a certain range, the self-resetting capability is provided for the device while the energy consumption is carried out, and certain guarantee is provided for the restorability of the device; the viscoelastic material in the viscoelastic damper is subjected to large-amplitude shearing displacement to consume energy and absorb shock, and meanwhile, after the viscoelastic material cushion layer wrapped outside the beam column body is subjected to the force transmitted by the device, the viscoelastic material cushion layer is subjected to compression and shearing deformation to consume energy and absorb shock jointly, and the steel plate wrapping component also plays a certain hoop effect on the beam column body to strengthen the shock resistance of the beam column body, so that the dynamic response of the frame structure and the deformation and damage of the frame node are reduced, and the shock resistance toughness of the structure is improved.
The assembled self-resetting viscoelastic anti-seismic toughness lifting system is arranged on the beam body and the column body of the upper nodes at two sides of the frame structure and the beam body of the next layer, and can be only arranged on the beam body and the column body of the upper node at one side of the frame and the beam body of the next layer, each device cooperatively works to form a self-resetting system for damping and dissipating energy, and the self-resetting system jointly deforms with the concrete frame to absorb a large amount of energy, so that the anti-seismic capacity and the self-resetting capacity of the nodes can be greatly improved, in addition, the SMA self-resetting damper can provide larger elastic restoring rigidity during work, the resettable performance of the frame nodes is improved, and the restorability and the easy-to-repair performance of the concrete frame nodes after earthquake are ensured.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The assembled self-resetting viscoelastic anti-seismic toughness lifting system is characterized by comprising at least one group of anti-seismic toughening components, wherein the anti-seismic toughening components comprise an outer-wrapping steel plate component (7), a viscoelastic damper (1), a diagonal bracing steel plate (5) and three SMA self-resetting damping devices (2);
one end of each of the two SMA self-resetting dampers is connected with two outer wrapping steel plate assemblies (7) through a viscoelastic damper (1), one end of the other SMA self-resetting damper (2) is hinged with a diagonal bracing steel plate (5), the other ends of the three SMA self-resetting dampers are hinged with nodes, the other ends of the diagonal bracing steel plates (5) are hinged with the other outer wrapping steel plate assemblies (7), the two outer wrapping steel plate assemblies connected with the viscoelastic damper (1) are wrapped on upper adjacent upper beam bodies and column bodies, the outer wrapping steel plate assemblies connected with the diagonal bracing steel plates (5) are arranged on lower beam bodies, and viscoelastic material blocks are filled between the outer wrapping steel plate assemblies (7) and the beam column bodies;
the SMA self-resetting damper comprises an outer steel plate (20), an inner steel plate (24) and an H-shaped sliding block plate (21);
two sliding grooves are formed in the inner steel plate (24) at intervals along the displacement direction, the H-shaped sliding block plates (21) are transversely arranged in the sliding grooves and can move along the sliding grooves, the outer steel plate (20) is connected with the two H-shaped sliding block plates (21) through SMA materials, and when the H-shaped sliding block plates (21) move along the sliding grooves, the SMA materials deform to consume energy.
2. The assembled self-resetting viscoelastic vibration-resistant toughness lifting system according to claim 1, comprising two groups of vibration-resistant toughening components symmetrically distributed along the center of the beam column, wherein the diagonal bracing steel plates (5) of the two groups of vibration-resistant toughening components are hinged with the same outer wrapping steel plate component (7).
3. The assembled self-resetting viscoelastic vibration-resistant toughness hoisting system as claimed in claim 1, wherein the viscoelastic damper (1) comprises a first connecting steel plate (11), a second connecting steel plate (13), a chute fixing steel plate (16) and a sliding device;
the first connecting steel plate (11) is fixed on the outer wall of the outer wrapping steel plate assembly (7), the second connecting steel plate (13) is arranged on the outer side of the first connecting steel plate (11) in parallel, a viscoelastic material (12) is adhered between the first connecting steel plate (11) and the second connecting steel plate (13), the two sliding devices are arranged on two sides of the second connecting steel plate (13) in parallel and symmetrically, the two sliding devices are arranged along the axial direction of the beam body or the column body, one end of the sliding groove fixing steel plate (16) is pressed on the sliding devices in a pressing mode, and the other end of the sliding groove fixing steel plate is connected with the second connecting steel plate (13).
4. A fabricated self-resetting viscoelastic vibration-resistant flexible lifting system as claimed in claim 3, wherein said sliding means comprises a ball chute (29) and a plurality of linearly arranged balls embedded therein, the ball chute (29) being fixed to the second connecting steel plate (13), and the chute-fixing steel plate (16) being press-fitted to the balls.
5. A fabricated self-resetting viscoelastic vibration-resistant toughness-improving system according to claim 3, wherein the second connecting steel plate (13) is provided with an X-shaped steel plate (14), and the center of the X-shaped steel plate (14) is welded with a second hinge seat (15).
6. The assembled self-resetting viscoelastic vibration-resistant toughness lifting system according to claim 1, wherein a first node steel plate (3) is arranged between the three SMA self-resetting dampers, the ends of the three SMA self-resetting dampers are respectively and rotatably connected with the first node steel plate (3), and a plurality of shaft holes are uniformly distributed on the circumference of the first node steel plate (3).
7. The assembled self-resetting viscoelastic vibration-resistant toughness lifting system according to claim 1, wherein outer steel plates are symmetrically arranged on two sides of the inner steel plate (24), two ends of the H-shaped sliding block plate (21) transversely extend out of two sides of the sliding groove, two fixing plates are arranged on one side, close to the inner steel plate (24), of the outer steel plate (20), the two fixing plates are respectively located on one side, close to each other, of the two H-shaped sliding block plates, a plurality of SMA bars (22) are located between the two fixing plates, and two ends of the SMA bars sequentially penetrate through the fixing plates and the ends of the H-shaped sliding block plates to be connected with nuts (23).
8. The assembled self-resetting viscoelastic vibration-resistant toughness lifting system according to claim 1, wherein the two H-shaped sliding block plates are respectively abutted with one ends of the two sliding grooves, which are close to each other.
9. The assembled self-resetting viscoelastic vibration-resistant toughness lifting system according to claim 1, wherein the outer-covered steel plate assembly (7) comprises a hollow tube formed by sequentially assembling a plurality of steel plates end to end, grooves for bonding viscoelastic gaskets are formed in the inner walls of the steel plates, one side of each viscoelastic gasket is bonded in each groove, the other side of each viscoelastic gasket protrudes out of each groove and covers the inner wall of each steel plate, and the viscoelastic gaskets of the steel plates are connected end to form an annular closed structure.
10. A method of assembling a self-resetting viscoelastic vibration-resistant toughness-improving system according to any one of the claims 1-9,
when the concrete frame structure is subjected to small vibration and wind vibration, the SMA material of the SMA self-resetting damper generates tensile deformation to consume energy, and meanwhile, the viscoelastic material in the viscoelastic damper generates shear deformation to absorb vibration and consume energy;
when the concrete frame node receives the major earthquake effect, the SMA attenuator tensile deformation consumes energy, provides self-reset ability for the antidetonation system simultaneously, and the viscoelastic material in the viscoelastic attenuator takes place shear deformation and consumes energy shock attenuation, and the viscoelastic material piece between beam column and the outsourcing steel sheet subassembly takes place to compress and shear deformation jointly and consumes energy shock attenuation simultaneously, and the outsourcing steel sheet subassembly plays the hoop effect to the beam column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310259452.0A CN116180925A (en) | 2023-03-16 | 2023-03-16 | Assembly type self-resetting viscoelastic anti-seismic toughness improving system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310259452.0A CN116180925A (en) | 2023-03-16 | 2023-03-16 | Assembly type self-resetting viscoelastic anti-seismic toughness improving system and method |
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| CN202310259452.0A Pending CN116180925A (en) | 2023-03-16 | 2023-03-16 | Assembly type self-resetting viscoelastic anti-seismic toughness improving system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117868302A (en) * | 2024-03-11 | 2024-04-12 | 中国船舶集团国际工程有限公司 | Self-resetting assembled inter-column support |
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2023
- 2023-03-16 CN CN202310259452.0A patent/CN116180925A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117868302A (en) * | 2024-03-11 | 2024-04-12 | 中国船舶集团国际工程有限公司 | Self-resetting assembled inter-column support |
| CN117868302B (en) * | 2024-03-11 | 2024-05-28 | 中国船舶集团国际工程有限公司 | Self-resetting assembled inter-column support |
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