314 results about "Seismic isolation" patented technology

The invention discloses a circular wooden column-hole-hidden graphite hardwood-graphite layer-along-column foundation stone seismic isolation system which is mainly used for seismic isolation and self-resetting of the bottom of a wooden structure circular wooden column. The shock insulation system is composed of a round wooden column, hole-hidden graphite hardwood, concave spherical surface belt limiting edge column foundation stone, a graphite layer and an annular tempered glass sealing plate. The hole-hidden graphite hardwood is composed of a convex spherical section, a thick cylindrical section, a graphite-hidden hole and a thin cylindrical connecting key which are integrally processed, and the thin cylindrical connecting key is inserted into the round hole in the bottom of the round wooden column to achieve positioning butt joint. The graphite layer can reduce the friction force between the convex spherical surface of the hole-hidden graphite hardwood and the concave spherical surface of the column foundation stone. The concave spherical surface of the column foundation stone enables the round wooden column to reset automatically after an earthquake, and the limiting edge of the column foundation stone can limit excessive displacement of the bottom of the round wooden column in the vibration process. And the annular toughened glass sealing plate can be sealed and waterproof. The seismic isolation system has the advantages of reducing the seismic action of an upper structure through bottom seismic isolation of the circular wooden columns and achieving structural toughness seismic resistance through self-resetting after an earthquake.

The utility model relates to a sliding shock insulation modular building which comprises a module group forming a building main body. The building foundation is used for bearing the module group; the sliding layer is arranged between the module group and the building foundation and comprises an upper sliding interface and a lower sliding interface which are fixedly connected with the bottom of the module group and the top of the building foundation respectively, and a sliding medium arranged between the upper sliding interface and the lower sliding interface; and the sliding starting control part is connected with the module group and the building foundation and is used for controlling the sliding starting state. Compared with the prior art, the earthquake response of an upper modular building can be reduced, non-structural members in the modules can be protected, the module units are lighter in design, the connection between the adjacent modules is simpler, and the connecting structure adapts to the characteristics of various layouts and stress; the anti-seismic performance of the modular building is improved through simple sliding seismic isolation measures which are low in manufacturing cost and convenient to construct.

The invention relates to the technical field of data processing, in particular to a three-dimensional displacement high-precision monitoring method and system for a seismic isolation support, and the method comprises the steps: obtaining acceleration data of the seismic isolation support in different axial directions and a spectrogram of each axial direction within a preset time period; according to the amplitude distribution condition of each frequency in each axial spectrogram, screening out a seismic main frequency, and according to the amplitude proportion condition of the seismic main frequency in each axial spectrogram, obtaining a relative energy value in each axial direction; correcting the acceleration data of each axial direction according to the correlation between the acceleration data of each axial direction and the acceleration data of other axial directions in combination with the distribution condition and the relative energy value of the acceleration data of each axial direction to obtain corrected data of each axial direction; and determining the three-dimensional displacement data of the shock insulation support based on the integral result of each axial correction data. According to the invention, other interference components can be effectively inhibited, and the monitoring precision of the seismic isolation support displacement data is improved.

The invention discloses a mounting method of a liftable isolation bearing, which comprises the following steps: pre-burying and fixing a positioning plate on a lower structural member, and enabling the central position of a placing groove and a notch plane to meet preset coordinate and levelness requirements; and the support body is hoisted to the position above the positioning plate, and the shear key is inserted into the containing groove under guiding, so that alignment of the shear key and the containing groove is completed. Torque is applied to connecting bolts arranged between a lower flange plate and a positioning plate in a staged mode according to a preset sequence, the vertical gaps between the bottom face of the lower flange plate and the upper surface of the positioning plate are actually measured at multiple positions after fastening, the bolt fastening state is adjusted according to the vertical gaps, and closed-loop control of torque control, gap measurement and bolt adjustment is formed. And the lift-off gap is accurately controlled within a millimeter-level allowable deviation range of a designed lift-off gap value.

The invention relates to the technical field of building seismic isolation, in particular to a seismic isolation system with a vertical stepped quasi-zero stiffness characteristic and a design method of the seismic isolation system. A building three-dimensional seismic isolation system with the vertical stepped quasi-zero stiffness characteristic comprises a horizontal seismic isolation support arranged on the top face of a lower buttress; the positive stiffness system comprises at least one vertical steel spring, and the two ends of the vertical steel spring are connected to the top face of the horizontal shock insulation support and the bottom face of the upper buttress correspondingly. The negative stiffness system comprises a variable-slope guide plate, a horizontal multi-layer annular spring and a supporting plate, the thickness of the variable-slope guide plate changes in the height direction of the variable-slope guide plate, one end of the horizontal multi-layer annular spring abuts against the variable-slope guide plate, the horizontal multi-layer annular spring is connected to the supporting plate, and the supporting plate is connected to the upper buttress; the horizontal multi-layer annular spring can be driven to move along the surface of the variable-slope guide plate by changing the distance between the upper buttress and the lower buttress, and the horizontal multi-layer annular spring moves along the surface of the variable-slope guide plate, so that the length of the horizontal multi-layer annular spring is changed, and then negative stiffness is provided.

The invention provides a seismic isolation structure AMD control system based on the seismic energy storage principle, and relates to the technical field of structural engineering and damping control. The bottom of the building dissipates energy through the shock insulation support and the hydraulic inerter damper, earthquake input is converted into gravitational potential energy, mechanical energy and electric energy, and the energy storage module supplies energy to the active tuned mass damper arranged on the top of the upper structure. The system monitors structural response in real time through the acceleration sensor and the force sensor, the AMD intelligent control unit calculates and outputs control force capable of reducing upper vibration and generating reverse overturning bending moment, and therefore structural vibration is restrained and the shock insulation support is prevented from being pulled under the strong shock working condition, and the overall anti-seismic performance of the shock insulation structure is remarkably improved.

The invention belongs to the technical field of friction pendulum shock insulation support performance testing, and particularly relates to a friction pendulum shock insulation support performance testing device and method.The friction pendulum shock insulation support performance testing device comprises a testing table base, a testing device body is arranged at the left end of the testing table base, and a vertical jack is fixedly installed in the upper end of the testing device body; a mounting plate is fixedly mounted at the telescopic end of the vertical jack, and an upper bearing plate is fixedly mounted on the lower side of the mounting plate through bolts. By arranging the bearing assembly, the output shaft of the first driving motor drives the first driving screw rod to rotate so as to drive the bearing assembly to move left and right, so that a shear performance test is carried out on the friction pendulum shock insulation support; and the output shaft of the second driving motor can drive the driving gear and the driven gear to rotate, so that the lower bearing plate drives the friction pendulum shock insulation support to twist, and then the torsion performance test is performed on the friction pendulum shock insulation support.

To provide a metal fitting for preventing bolt loosening for fixing a seismic isolation device, which completely prevents bolts from loosening physically, improves the safety of a building against earthquakes, and dramatically shortens the work time required for the maintenance. [Solution] The seismic isolation device fixing bolt loosening prevention fitting has a plate-shaped main body, a hole in the center of the main body into which the hexagonal head of the seismic isolation device fixing bolt fits, the shape of the hole is a dodecagonal star or an octadecagonal star, and a locking portion on the periphery that physically prevents the seismic isolation device fixing bolt loosening prevention fitting from rotating.

The invention discloses a tower column section flange connection node and a wind power tower damping structure system, and belongs to the field of wind power, the flange connection node comprises a wind power tower, a first stiffening rib, a second stiffening rib, an inner friction plate, an outer friction plate and a pre-tightening force control device, the wind power tower is in a through shape, the inner side of the first stiffening rib is fixedly connected with an upper column section of the wind power tower, and the outer side of the second stiffening rib is fixedly connected with a lower column section of the wind power tower; the inner side of the second stiffening rib is fixedly connected with the lower column section of the wind power tower drum, the inner friction plate and the outer friction plate are attached to the inner side and the outer side of the first stiffening rib and the inner side and the outer side of the second stiffening rib and are connected through a pre-tightening force control device for providing pre-tightening force, and the inner friction plate, the outer friction plate and the inner side and the outer side of the first stiffening rib and the inner side and the outer side of the second stiffening rib jointly form a friction pair. The device has good seismic mitigation and isolation performance, by means of the characteristic of friction connection and the swing mechanism, the column sections of the wind power tower are connected through the flange joints, and the dual anti-seismic mechanism of friction energy dissipation and vibration reduction and swing seismic isolation is achieved.

To provide a slide member that reliably causes vibration of an earthquake to slide irrespective of a material of a floor surface.SOLUTION: A slide member (100) includes: a reinforcement material (120) including a slide surface (102) and a non-slide surface (101) provided at an opposite surface to the slide surface (102) and having a thin metallic wire structure constituted of a thin metallic wire; and a slide material (110) including graphite that fills an interval between thin metallic wires constituting the reinforcement material (120).SELECTED DRAWING: Figure 2

The invention discloses a variable-stiffness friction slippage anti-swing three-dimensional shock isolation device and a shock absorption method thereof, and belongs to the technical field of building shock isolation and shock absorption. According to the technical scheme, the vibration damper comprises a top plate, a horizontal rubber support, a center mass block, a spring support, a limiting plate, a friction plate, a vertical rubber support and a bottom plate. The multi-stage self-adaptive rigidity mechanism has the beneficial effects that the friction material is arranged between the limiting plate and the friction plate, and the friction sliding position and the motion state can be controllably adjusted by adjusting the pre-tightening force of the bolt, the friction coefficient and the rigidity of the vertical rubber support, so that the multi-stage self-adaptive rigidity mechanism is formed; and the shock insulation and self-resetting performance of the structure under the action of horizontal and vertical earthquakes is obviously improved. The device has good three-dimensional shock insulation and swing resistance, and is simple in structure and convenient to install and maintain. The dynamic response of the upper structure applying the device under the earthquake action can be effectively inhibited, so that the structural safety and the use comfort are guaranteed.

The utility model discloses a large-span seismic isolation seam cover plate construction structure, and relates to the technical field of building structures. Comprising a seismic isolation seam buffering and resetting mechanism arranged in a seismic isolation seam, the seismic isolation seam buffering and resetting mechanism is connected with a building through connecting pieces on the two sides, the connecting pieces are fixed to the building through expansion bolts, anti-seismic dampers are arranged on the two connecting pieces, and a seismic isolation seam cover plate is arranged at the upper ends of the anti-seismic dampers. Through the arrangement of the shock insulation seam buffer reset mechanism and the connecting piece, the shock insulation seam can be supported after a building vibrates and earthquakes, and the structural safety of the shock insulation seam is guaranteed; through the arrangement of the seismic isolation seam cover plate and the connecting pieces on the two sides of the seismic isolation seam cover plate, the movement range of the connecting pieces in the vibration process of a building can be expanded, and the seismic isolation seam cover plate can be suitable for protection of a large-span seismic isolation seam; the problems that a traditional seismic isolation joint cover plate is small in deformation capacity, the deformation requirement of a large-span seismic isolation joint in use cannot be met, and the buffering and resetting effects cannot be achieved in the earthquake process are solved.

The application belongs to power transmission and transformation engineering technical field, and provides an interactive displacement amplification type wide-width isolation device and method for valve hall of converter station. The system comprises a top rubber block, side plates, a transverse energy dissipation device, a connecting rod, a displacement amplifier, a longitudinal damper, a spring piece, a fixing rod and a base. One end of each side plate is connected to two ends of the top rubber block respectively, and the other end of each side plate is inserted into the transverse energy dissipation device to realize transverse displacement through the transverse energy dissipation device. The side surface of the transverse energy dissipation device is fixed on the base with a cavity. The lower part of the transverse energy dissipation device is connected to the bottom surface of the base through the fixing rod. The lower part of the top rubber block is fixed with the connecting rod and forms an integral whole. The lower part of the displacement amplifier is connected to the longitudinal damper. The lower part of the longitudinal damper is an arc surface and is attached to the arc surface of the base. The two sides of the longitudinal damper are respectively attached to a spring piece. The horizontal and vertical vibrations are synchronously and efficiently dissipated.

The present invention relates to a curtain wall having seismic isolation structure performance, the curtain wall including: vertical frames arranged at intervals; a plurality of horizontal frames connecting the vertical frames; and vibration prevention connection mechanisms provided between the plurality of vertical frames and horizontal frames to connect the vertical frames and the horizontal frames, wherein each of the vibration prevention connection mechanisms includes: a vibration prevention bracket body which is coupled to a vertical frame and has a hollow part formed therein; an inner elastic bracket which has one end connected to both sides of an inner wall of one end of the vibration prevention bracket body, is formed to extend to the outside of the other end of the vibration prevention bracket body, and has the other end provided as a fastening pipe; a buffer member disposed between an inner surface part of the vibration prevention bracket body and the inner elastic bracket; and a fastening element fastened to a horizontal frame through the fastening pipe.

The invention discloses a seismic response analysis method for a magnetic levitation line axle coupling system with a seismic isolation support. The method comprises the steps that a motion equation of the magnetic levitation line axle coupling system considering nonlinear mechanical behaviors of the seismic isolation support under the seismic action is constructed; and solving the motion equation by considering equivalent linearization and separation iteration to obtain the dynamic response of the maglev line vehicle and the bridge. According to the method, a bridge model considering the nonlinear hysteresis behavior of the seismic isolation support and a magnetic track interaction model based on PID active control are established, and unified seismic analysis is carried out on strong nonlinear energy consumption of the seismic isolation support and specific active control dynamics of a magnetic levitation vehicle; the problem that an existing universal axle coupling analysis method cannot be directly applied to the complex system is solved.

The utility model provides a three-opening type shock insulation support mould, which comprises an upper mould, a mould core, a lower mould, a lower mould locking mechanism and a mould core, the mould core comprises four sliding blocks, and the upper mould locking mechanism and the lower mould locking mechanism are respectively provided with a plurality of locking surfaces, so that the four sliding blocks can be locked from a plurality of directions through the plurality of locking surfaces when the mould is closed, and the mould core can be locked from a plurality of directions through the plurality of locking surfaces. Therefore, the quality and the dimensional accuracy of the finished support can be improved, and the locking structure is simple and easy to design and process. Furthermore, the bottoms of the sliding blocks are provided with inclined inclined guide pillar holes, the lower mold is provided with corresponding inclined guide pillar sleeve holes, and the lower mold locking mechanism is provided with a plurality of corresponding inclined guide pillars, so that the four sliding blocks can be driven by the inclined guide pillars to move towards the direction in which the four sliding blocks are separated from each other after the vulcanization process is finished and the mold is opened, and demolding is very convenient to realize; and a complicated driving structure does not need to be arranged, so that efficient production of the shock insulation support can be realized with relatively lower equipment cost.

The present invention provides a reinforced concrete and wooden high-rise building with seismic isolation capabilities, which also allows for the stable support of the elevator shaft while avoiding interference with the lower floors. [Solution] A seismically isolated high-rise building 10 includes a lower floor 20 made of reinforced concrete and an upper floor 30 made of wood hybrid structure, wherein an intermediate seismic isolation layer 40 is provided between the lower floor 21 and the upper floor 22 of the lower floor 20. An elevator shaft 35 is supported by the upper floor 30 and extends to a height reaching the floor slab 21a of the lowest floor of the lower floor 20, and is supported inside the concrete core section 50. The elevator shaft 35 is inserted between the ceiling slab 41 and the floor slab 21a of the lower floor 21, maintaining a spacing of 41c, 21c between them and the opening edges of the insertion openings formed in the ceiling slab 41 and floor slab 21a.

An anti-seismic grid framework system (206) comprising a grid framework structure (114) for supporting load handling devices (30) operable to move one or more containers (10) in a stack (12), the grid framework structure (114) comprising: a series of intersecting grid members (118, 120) arranged to form a grid (50), the grid (50) comprising a number of substantially rectangular frameworks (54) in a horizontal plane, each substantially rectangular framework (54) constituting a grid cell, the grid (50) being supported at each intersection (56) of the series of grid members (118, 120) by a number of upright columns (116) to form a number of upright storage locations (58) for stacking containers (10) between the upright columns (116) and guiding in a vertical direction through the number of substantially rectangular frameworks (54), characterized in that the anti-seismic grid framework system (206) further comprises a seismic isolation system (208) for reducing seismic forces acting on the grid framework structure (114), wherein the grid framework structure (114) is supported by the seismic isolation system (208), the seismic isolation system (208) comprising an upper structure (202) and a lower structure (200), and at least one seismic isolation device (204) is placed between the upper structure (202) and the lower structure (200) such that the at least one seismic isolation device (204) restrains movement of the upper structure (202) relative to the lower structure (200) in a seismic event.

This invention relates to the field of vibration reduction technology, specifically to a spliced ​​acoustic black hole vibration reduction pile and its usage method. The pile includes a composite pile body, a stepped spliced ​​acoustic black hole module, a seismic isolation bearing layer, and a magnetic ball bearing eddy current damping module. The composite pile body is vertically embedded in the foundation. The stepped spliced ​​acoustic black hole module is disposed inside the composite pile body. The seismic isolation bearing layer is installed on top of the composite pile body. The magnetic ball bearing eddy current damping module is installed on the upper part of the seismic isolation bearing layer. The magnetic ball bearing eddy current damping module is used to support the superstructure. Ring units of different thicknesses are welded together, and the overall outer contour conforms to a power-law curve, gradually thinning the acoustic black hole ring. The acoustic black hole ring attenuates seismic waves, and the magnetic ball bearing mode conversion mechanism converts the highly destructive horizontal seismic force into vertical pressure that the composite pile body can withstand and dissipates it.

The application discloses a kind of multi-directional multi-functional parallel type metal damper of shock insulation layer, it is related to damper technical field, including base, rotary installation is rotated in base, and the upper portion of rotary disc is provided with pressure disc, and the upper surface of pressure disc is installed with connecting disc, by the innovative three-dimensional space multilayer U type nested matrix structure, adaptive slide rail fastener system and modular multi-directional parallel assembly system, optimization structure design, material selection and manufacturing process, realize damper under the complex load effect High efficient energy dissipation, wind resistance, tensile, limiting and self-resetting.Meanwhile, introduce intelligent reset mechanism, promote damper reset under the condition of large deformation, large residual deformation, ensure subsequent use function and maintenance-free, to improve safety and reliability, reduce installation and maintenance cost.The multistage deformation concept proposed in the application can realize multistage energy dissipation, multistage wind resistance and multistage limiting function, and can simultaneously adapt to seismic and vibration control requirements.

This utility model relates to the field of building steel structure technology and discloses a seismic-resistant building steel structure, including two columns, with a second horizontal column and two first horizontal columns slidably connected between the two columns. The two ends of the first horizontal columns and one second horizontal column are fixedly connected to plug-in blocks. This modular plug-in structure achieves efficient assembly and connection between the steel columns and multiple sets of horizontal beams, significantly improving construction convenience. Simultaneously, a liquid-filled honeycomb buffer mechanism and a spring reset system are introduced at the connection points, which can absorb vibration energy under seismic action and automatically return to their original position, significantly enhancing the structure's seismic buffering capacity and recovery performance. Furthermore, the rubber shock-absorbing seat at the bottom further enhances the structure's seismic isolation effect, thus achieving a comprehensive seismic-resistant building steel structure solution that is high-strength, quick-assembly, energy-dissipating, resettable, and highly safe.

The invention discloses a self-resetting eddy current friction composite damping vibration double-control seismic isolation device and application thereof. The device comprises a top plate, an array thick rubber body is arranged below the top plate, a permanent magnet set is annularly installed along the thick rubber body, and a polyfluortetraethylene plate is embedded in the lower surface of the thick rubber body; the lateral surface of the top plate is provided with a protective cylinder which is internally provided with a transverse reset spring; polytetrafluoroethylene plates are arranged on the inner surfaces of the vertical baffles, two sliding blocks are arranged on the inner surfaces of the vertical baffles, the sliding blocks are connected through vertical reset springs, and the sliding blocks are hinged to the corresponding protective cylinders through connecting rods. A high-transmittance acrylic plate is mounted between every two adjacent baffles; a copper plate is laid on the upper surface of the base plate. Composite damping cooperative energy consumption is achieved through horizontal friction-eddy current damping and vertical friction, the vertical and horizontal three-dimensional shock isolation function is achieved through the array thick rubber body, and cooperative reset is achieved through the horizontal springs and the vertical springs.

To provide a base-isolated structure capable of improving earthquake resistance of an upper structure at the time of excessive earthquake input.SOLUTION: A base isolation structure 100 including a base isolation layer 20, and an upper layer structure 22 placed above the base isolation layer 20 includes: a laminated rubber 24 which is provided on the base isolation layer 20, and has such hardening property as to reduce displacement of the base isolation layer 20; an elasto-plastic damper 26 and an oil damper 28 provided on the base isolation layer 20; and an oil damper 30 which is provided on the undermost layer of the upper structure 22, and suppresses vibration of the upper structure 22.SELECTED DRAWING: Figure 1

The invention discloses a T-shaped wooden column-hole-hidden graphite hardwood-graphite layer-along column foundation stone seismic isolation system which is mainly used for seismic isolation and self-resetting of the bottom of a wooden structure T-shaped wooden column. The shock insulation system is composed of a T-shaped wooden column, three pieces of hole-hidden graphite hardwood, three pieces of concave spherical surface belt limiting edge column foundation stones, a graphite layer and three annular tempered glass sealing plates. The T-shaped wooden column is composed of three column limbs formed by connecting four round timbers through square timber ladders and bamboo plywood. The hole-hidden graphite hardwood is composed of a convex spherical section, a thick cylindrical section, a graphite-hidden hole and a thin cylindrical connecting key which are integrally processed. The graphite layer can reduce friction force between the convex spherical surface and the concave spherical surface of the column foundation stone. The concave spherical surface of the column foundation stone can enable the T-shaped wooden column to reset automatically after an earthquake, and the limiting edge of the column foundation stone can limit excessive displacement of the bottom of the T-shaped wooden column in the vibration process. And the annular toughened glass sealing plate can be sealed and waterproof. The shock isolation system has the advantages that the earthquake action of an upper structure is reduced through bottom shock isolation of the T-shaped wooden columns, and structural toughness earthquake resistance is achieved through self-resetting after an earthquake.

The application discloses a combined energy dissipation and shock absorption device for high-speed railway bridges, which is arranged symmetrically on both sides of a seismic isolation bearing between a prefabricated pier column and a prefabricated bridge, and is connected with the prefabricated bridge and the prefabricated pier column through mounting members at the bottom and the top. The device comprises multiple groups of connecting members which are uniformly arranged between the mounting members, and a viscoelastic energy dissipation unit, a bending energy dissipation unit and a limiting shear plate energy dissipation unit which are sequentially arranged between adjacent connecting members from top to bottom. The adjacent connecting members are connected and fixed with the mounting members at the top of the prefabricated pier column and the lower side of the prefabricated bridge body respectively only through the bottom surface and the top surface. In a normal state, the seismic isolation bearing, the viscoelastic energy dissipation unit and the bending energy dissipation unit provide small rigidity to resist variable loads such as wind load and temperature effect, and the shear plate energy dissipation unit does not work. In a small earthquake, the viscoelastic energy dissipation unit and the bending energy dissipation unit provide small rigidity to resist horizontal seismic action. In a large earthquake, the limiting shear plate energy dissipation unit provides large rigidity to resist horizontal seismic action.

A nuclear reactor must be designed and constructed to withstand seismic events. A modular integrated reactor support structure includes seismic isolators that rely on viscous dampers and elastic support assemblies to provide three-dimensional seismic isolation to the reactor head, reactor vessel and reactor internal components. The gravitational load of the reactor head, reactor vessel, and reactor internals is supported through the reactor head, which transfers the load to a plurality of seismic isolators, which in turn, transfer the load to the basemat of the reactor building. A plurality of reactor support assembly blocks couple the reactor head to the seismic isolators while permitting thermal expansion and contraction of the reactor head while limiting rotational motion.

The utility model relates to a shock insulation layer structure, in particular to a building shock insulation layer structure. The problem that an existing building seismic isolation layer is poor in structural integrity and seismic resistance is solved. The building shock insulation layer structure is composed of a plurality of building concrete columns, a first shock insulation support, a second shock insulation support, a first cable-stayed part and a second cable-stayed part. Each building concrete column is composed of an upper concrete column, a middle concrete column and a lower concrete column; two shock insulation supports are arranged in each building concrete column, so that the displacement deformation recovery time is shortened, and the concrete column can be rapidly recovered to the initial position, so that the vibration isolation effect can be continuously achieved in continuous vibration. The first shock insulation supports and the second shock insulation supports in the adjacent building concrete columns are arranged in a staggered mode in the height direction, the adjacent building concrete columns are tied through the first cable-stayed parts and the second cable-stayed parts, the building concrete columns are connected into a whole, damage or failure caused by overweight local loads is avoided, and the service life of the building concrete columns is prolonged. And the overall safety and reliability of the building are improved.

The application relates to a design method of a seismic mitigation support based on a pier damping rate, comprising the following steps: determining a basic seismic system of a bridge; obtaining the internal force response of a pier bottom when the seismic mitigation support is arranged based on the pier damping rate, so as to obtain a second shear force based on a shear damping rate and a second bending moment based on a bending moment damping rate; establishing a bridge seismic stress and a calculation model when the seismic mitigation support is arranged, and obtaining the internal force response of the pier bottom when the seismic mitigation support is arranged based on a dynamics equation, so as to obtain a third shear force and a third bending moment based on the parameters of the seismic mitigation support; and determining the parameters of the seismic mitigation support based on the principle that the second shear force is equal to the third shear force or the second bending moment is equal to the third bending moment. The application obtains the internal force response of the pier bottom when the seismic mitigation support is arranged based on the pier damping rate and the dynamics equation respectively, and constructs a relational expression between the pier damping rate and the parameters of the seismic mitigation support based on the principle that the internal force responses are equal, so that the parameters of the seismic mitigation support can be determined quickly and accurately.

To provide a simple base isolation device capable of preventing buckling when undergoing large deformation and to provide a base isolation structure provided with the base isolation device.SOLUTION: A base isolation device 10 comprises a multi-stage laminated rubber bearing 18 made up of: laminated rubber 22 which is installed in a base isolation layer 16 between a superstructure 12 and a substructure 14 and arranged in stages in a vertical direction; and a connection member 32 which is arranged between upper and lower laminated rubber 22 and connects the upper and lower laminated rubber 22. The base isolation device also has a buckling prevention bearing 20 which is installed at a distance from the multi-stage laminated rubber bearing 18 in a horizontal direction. The buckling prevention bearing 20 has a slide section 36 which allows the connection member 32 to come into contact with and to slide on the same when the multi-stage laminated rubber bearing 18 undergoes deformation of predetermined magnitude or more.SELECTED DRAWING: Figure 1

The invention relates to the technical field of engineering seismic isolation, in particular to a variable-stiffness self-resetting seismic isolation support under the action of strong earthquake.The variable-stiffness self-resetting seismic isolation support comprises an upper connecting steel plate, a rubber seismic isolation element and a lower connecting steel plate, and the upper portion of the rubber seismic isolation element is fixedly connected with the upper connecting steel plate through bolts; the lower part of the rubber shock insulation element is connected with the lower connecting steel plate in a sliding manner; the upper surface of the lower connecting steel plate is a sliding friction surface, an annular limiting device is arranged in the middle of the sliding friction surface, SAM collecting springs and SMA pulleys are arranged at the four corners of the lower connecting steel plate, SMA wires are wound in the SAM collecting springs, the length of the SMA wires needs to meet the requirement for first-stage deformation of the rubber shock insulation element, and the length of the SMA wires needs to meet the requirement for second-stage deformation of the rubber shock insulation element. The SMA pulleys are used for releasing SMA wires, and SMA fixing devices are arranged at the four corners of the upper connecting steel plate. The variable-stiffness shock insulation support suitable for the earthquake frequent occurrence area can adapt to the earthquake action of different intensities, and variable-stiffness shock insulation control of an engineering structure under the action of strong earthquakes is achieved.