945 results about "Seismic isolation" patented technology

The invention discloses a seismic isolation structure support three-dimensional deformation monitoring method and system based on binocular vision. The method comprises the steps that a binocular camera is adopted to collect monitoring scenes under the view angle of a left camera and the view angle of a right camera; performing image distortion removal and three-dimensional correction on the monitored image pair by adopting camera internal and external parameters obtained by camera calibration; carrying out target detection on the corrected image by adopting a target detection algorithm; according to the coordinates of the target detection frame, calculating a cutting frame and cutting target areas in the left image and the right image; carrying out stereo matching on the cut image pair; according to the disparity value of each pixel in the disparity map, depth information of the target is calculated through a triangulation method, and finally a three-dimensional dense point cloud of the target is generated; performing optimization processing on the target three-dimensional dense point cloud obtained in the previous step to obtain an optimized point cloud; solving a rigid body transformation matrix of the two-point clouds by using an iterative nearest point algorithm; according to the invention, the cost of monitoring the three-dimensional pose deformation of the rubber support can be reduced, and the robustness and precision are effectively improved.

The invention discloses a data center seismic isolation performance detection method based on AI intelligence, and particularly relates to the technical field of seismic isolation performance detection. Earthquake vibration characteristic data are collected in real time on a data center building and equipment, earthquake input characteristics are extracted in combination with a historical earthquake wave database, a seismic isolation performance prediction model is constructed and trained, a foundation shear wave velocity gradient abnormal value and a seismic isolation layer dynamic displacement response deviation ratio are further extracted, a deviation index is comprehensively calculated, and a seismic isolation performance prediction model is constructed and trained. And classification processing is carried out according to the deviation level, especially under the condition of a middle deviation level, foundation physical parameters are dynamically updated, and the model is optimized, so that the accuracy of the prediction model and the self-adaptive capability of the system are remarkably improved, and the shock isolation safety and the continuous operation capability of the data center in a strong shock environment are effectively guaranteed.

The invention relates to the technical field of bridge seismic resistance, in particular to a bridge transverse quasi-seismic isolation multistage ordered seismic resistance construction method, which is used for determining performance targets under three levels according to seismic fortification requirements of a bridge structure under earthquakes with different strength levels, and providing a reasonable mechanical parameter valuing method of a steel stop block. A quasi-seismic isolation bridge multi-stage seismic fortification mechanism is established, the seismic potential of each component is exerted in sequence, the seismic damage degree of the bridge can be controlled and reduced according to an expected performance target, the phenomenon of beam falling of an upper structure of the bridge can be effectively prevented, and therefore a multi-stage ordered seismic isolation and seismic fortification mechanism is achieved.

The invention discloses a lifting sliding type shock insulation groove cover plate structure and a using method thereof.In an earthquake, a shock insulation device impacts the lower end of a first rod body and the front end of an optical axis, the lower end of the first rod body is pushed, and the first rod body and the optical axis synchronously move in the direction of a circular through hole of a fixed linear bearing and a circular through hole of a fixed frame; an X-shaped frame of the cross lifting mechanism is gradually changed into a small angle from a large angle, and drives an upper cover plate to be lifted upwards without being separated from an optical axis, so that the required displacement space of the seismic isolation device under the action of seismic force is realized; a displacement space is provided, and meanwhile, the cover plate is ensured not to fall into the shock isolation groove, so that the normal function of the shock isolation device is not influenced; according to the earthquake isolation groove, the use requirement of daily bearing can be met, the structure can be kept intact and not damaged after an earthquake occurs, repeated use is achieved after the earthquake isolation groove is reset manually, and the risk that the earthquake isolation groove falls into the earthquake isolation groove is avoided.

The invention discloses a quasi-zero stiffness vibration double-control device based on metamaterials, and relates to the technical field of vibration isolation and vibration reduction control. The device comprises a vertical vibration isolation structure, a horizontal vibration isolation layer, a middle plate, an upper connecting plate and a lower connecting plate, the vertical vibration isolation structure is connected to the top face of the horizontal vibration isolation layer, and the device is characterized in that the vertical vibration isolation layer is composed of a plurality of quasi-zero-stiffness metamaterial cell elements which are horizontally and evenly distributed, and each quasi-zero-stiffness metamaterial cell element comprises a buckle mechanism and a wave-shaped beam mechanism; the negative stiffness generated in the movement process of the buckle mechanism and the positive stiffness generated in the loading process of the wave-shaped beam mechanism counteract each other, and a quasi-zero stiffness mechanism is formed. According to the quasi-zero-stiffness metamaterial cell element, the initial stiffness of the quasi-zero-stiffness metamaterial cell element can be changed by adjusting the pre-tightening force of the bolts, so that the vertical bearing capacity is changed, different engineering requirements are met, the problem that low-frequency vibration isolation of a traditional vibration isolation device fails is solved, and the quasi-zero-stiffness metamaterial cell element is particularly suitable for meeting the earthquake and vibration dual-protection requirements of rail transit upper cover buildings.

The invention relates to a self-resetting multi-dimensional seismic mitigation and isolation support which comprises a seismic isolation main body mechanism, a double-cylinder type hydraulic damping seismic mitigation mechanism, a horizontal self-resetting mechanism and a friction pendulum inner sliding block jacking mechanism. According to the shock absorption and isolation support, the spring piece sets are vertically adopted for shock isolation, the vertical rigidity of the structure is reduced through the spring piece sets, the vertical natural vibration period of the structure is prolonged, and low-frequency vertical earthquakes can be effectively isolated; the double-cylinder type hydraulic damping shock absorption mechanism installed inside can consume vertical earthquake energy; a friction pendulum is adopted in the horizontal direction for shock insulation, and horizontal earthquake energy is consumed through friction between the inner sliding block and the base on the basis that low-frequency horizontal earthquakes are effectively isolated. According to the self-resetting multi-dimensional seismic mitigation and isolation support, parts are simple and convenient to assemble; the functions of horizontal and vertical limiting and horizontal self-resetting are achieved, damage of an earthquake to the seismic mitigation and isolation support is reduced, and post-earthquake maintenance is facilitated; and the anti-pulling performance is good. The self-resetting multi-dimensional seismic mitigation and isolation support can be used for seismic mitigation and isolation control of a building structure.

A vulcanization improvement process for a lead-free building seismic isolation rubber bearing and its mold device. The vulcanization improvement process comprises at least the following four steps after mold closing: step one: low-temperature pressurized exhaust step; step two: high-temperature and high-pressure vulcanization step; step three: high-temperature and low-pressure vulcanization step; step four: low-temperature and low-pressure vulcanization step. The vulcanization mold device comprises an upper mold plate, a middle mold frame, a lower mold plate and a middle hole positioning column. The middle mold frame contains a rubber bearing. The upper mold plate and the lower mold plate are respectively arranged at the upper and lower ends of the middle mold frame, and the two are symmetrical to each other. A step is arranged in the middle of the lower mold plate corresponding to the middle mold frame, and a slot hole adapted to the middle hole positioning column is arranged in the middle of the step. The present invention optimizes the existing compression molding vulcanization process for lead-free building seismic isolation rubber bearings, reduces the appearance defects of the products, realizes the alignment of the sealing plate holes and the positioning of the inner steel plate, shortens the production cycle of the products, and improves the appearance quality and performance stability of the products.

The invention discloses a vibration monitoring method, system and device based on an artificial intelligence model. The method comprises the steps of obtaining first time sequence data of a target seismic isolation support; obtaining second time sequence data of the first shock insulation support according to the associated information of the target shock insulation support; obtaining third time sequence data of the first equipment according to the installation information of the target shock insulation support; establishing an initial model; training the initial model to obtain a vibration analysis model; acquiring real-time monitoring data of the target seismic isolation support and the first seismic isolation support, and inputting the real-time monitoring data into the vibration analysis model to obtain predicted operation data; and real-time operation data of first equipment in a building where the target seismic isolation support is located are obtained, and a vibration analysis result is obtained according to the real-time operation data and the predicted operation data. The problems that a large number of data assets of an existing system are wasted, and the utilization rate of an intelligent support monitoring system is low are at least solved.

The utility model belongs to a bridge support, and particularly relates to a damping-controllable rigidity-variable shock insulation support. Comprising an upper seat plate, a spherical crown plate, a middle seat plate and a lower seat plate, the upper seat plate and the middle seat plate are positioned and connected through a shear plate and a shear bolt; the limiting mechanism is composed of a limiting check block and a limiting groove, the electromagnetic damping mechanism is composed of a magnet, a high-strength spring and a sheath coil, and the control device is composed of a ground motion sensor, a central processing module and a power supply module. The problems that in the prior art, the overall dimension of a support is too large, and the horizontal rigidity cannot be adjusted and changed once the horizontal rigidity is determined are solved, and the support has the advantages that the overall dimension of the support is small, the horizontal rigidity and damping are adjustable, and cooperative stress under the earthquake working condition of all piers is achieved.

The invention provides a separated anti-seismic bridge abutment structure in a high-intensity earthquake area. The anti-seismic bridge abutment structure comprises a pile foundation; the platform body is mounted above the pile foundation and is connected to the lower part of the main beam through a seismic mitigation and isolation support; the box-type back wall is mounted at the rear upper part of the platform body and is not connected with the platform body; one end of the limiting pull rod is mounted on the transverse partition plate of the main beam, and the other end is mounted on the box-type back wall; the anti-lateral pile is mounted below the box type back wall; the rear portion of the box type back wall and the peripheral sides of the pile tops of the anti-lateral piles are filled with energy dissipation materials. Collision buffering materials are filled between the main beam and the box type back wall. From the perspective of'function separation to improve system reliability ', the vertical bearing function and the horizontal bearing function of a traditional seat-type bridge abutment are separated, and the horizontal bearing structure is specially designed, so that the problems of girder falling and the like caused by insufficient limiting capability of the traditional seat-type bridge abutment on a girder in the longitudinal bridge direction in an earthquake are solved, and the safety of the system is improved. And the anti-seismic requirement is fully met.

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.

Present disclosure provides a test method and system for a seismic isolation structure, the method comprising: loading driving displacement time history signal into a substructure of the structure, recording restoring force time history feedback signal of the substructure; applying restoring force time history feedback signal to numerical substructure of seismic isolation structure, solving dynamic response of numerical substructure, recording structural displacement response time of the numerical substructure; calculating root-mean-square error (RMSE) of driving displacement time history signal and structural displacement response time signal; judging whether the RMSE is less than a threshold; if the RMSE is less than the threshold, ending the experiment; if the RMSE is not less than the threshold: correcting the time history signals according to a model identification algorithm, obtaining a corrected driving displacement time history signal of the next iteration, loading the corrected driving displacement time history signal onto the substructure, and repeating the steps.

The bottom die reinforcing device comprises two supporting assemblies which are oppositely arranged, each supporting assembly comprises four supporting plates, each supporting plate is provided with a head end and a tail end which are opposite, a sliding block is formed at the head end, a sliding groove formed in the length direction of the supporting plate is formed in the side portion of each supporting plate, and the tail end of each supporting plate is provided with a sliding block; the head end of each supporting assembly is arranged in the sliding groove of the other supporting plate in a sliding mode so that the four supporting plates can be connected end to end to form a rectangular sleeve hole in an enclosing mode, the rectangular sleeve holes of the two supporting assemblies are arranged on the top and the bottom of the seismic isolation support in a sleeving mode respectively, and the supporting plate of the supporting assembly at the bottom of the seismic isolation support is laid on the lower buttress; each supporting assembly comprises two pier blocks and a length-adjustable supporting rod, the supporting rods are connected to the two pier blocks, and the supporting assemblies are supported between the opposite sides of the supporting plates of the two supporting assemblies. The problem that a bottom die is prone to deformation due to the fact that an upper buttress pouring formwork of an existing shock insulation support is supported and reinforced through battens is solved.

The utility model relates to a friction type quasi seismic isolation support, a bridge and a building body, comprising a spherical support used for forming a first plane friction pair with a building body cross beam, and further comprising an additional plane support used for being fixed on a building bottom pier and used for being supported between the spherical support and the building bottom pier; a second plane friction pair is formed between the additional plane support and the spherical support, and the friction coefficient of the second plane friction pair is larger than that of the first plane friction pair; the structure further comprises a plurality of fragile shear keys, the upper ends of the fragile shear keys are connected to the spherical support, and the fragile shear keys abut against the two opposite sides of the additional plane support in the midspan direction of the building cross beam in a limited mode. According to the utility model, the upper structure of the building body can be prevented from being easily lifted when the building body suffers from a rare earthquake, the building body is prevented from losing the shock resistance after the rare earthquake, and the controllability of the friction coefficient is stronger.

The invention relates to the technical field of seismic resistance and transformation of civil engineering structures, and particularly discloses a novel quick replacement device and method for a seismic isolation support. Pre-pressing and accurate positioning of a new shock insulation support are achieved through the counter-force supporting frame and the pre-pressing system, rapid dismounting of an old or damaged shock insulation support and mounting of the new support are achieved, micro jacking can be conducted on an upper structure within a small disturbance range, the replacement efficiency is remarkably improved, and the construction risk is reduced.

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 discloses an assembly type shock insulation stair substructure in a multi-layer frame structure, which is formed by integrally connecting a plurality of upper and lower layers of staircases in the multi-layer frame structure, the bottom of the assembly type shock insulation stair substructure is supported in a frame beam of a top plate of the multi-layer frame main body structure through a shock insulation support, and a shock insulation seam is formed between the vertical face of the assembly type shock insulation stair substructure and the peripheral main body structure. Vertical isolation seams are formed between the top and the bottom of the assembly type shock insulation stair substructure and the main body structure correspondingly. A plurality of layers of staircases in a frame structure are independent from a main body structure, necessary through staircase columns are added to form an independent staircase sub-structure, a seismic isolation support is introduced to a bottom layer or a basement top plate, and the rigidity of a staircase frame sub-structure is increased by fully utilizing the supporting effect of a staircase inclined staircase plate and the rigidity effect of a filling wall; the earthquake isolation effect of the stair substructure is enhanced, the earthquake force of the earthquake isolation stair is reduced, and stair damage is greatly reduced.

The invention relates to the technical field of earthquake resistance of corridor supports, and discloses a variable-rigidity high-altitude corridor support which comprises a first mounting steel plate, a second mounting steel plate and a third mounting steel plate. Locking pieces connected with the third mounting steel plate are arranged at the four corners of the first shock insulation support, the four corners of the second shock insulation support and the four corners of the second mounting steel plate in a penetrating mode, and shearing grooves are formed in the locking pieces; the first shock insulation support and the second shock insulation support are both used for conducting shock absorption on the high-altitude corridor support so that variable stiffness control over the high-altitude corridor support can be achieved. According to the invention, a set of multi-level rigidity-variable seismic isolation support is constructed, and based on a unique mechanical response mechanism of a multi-level seismic isolation system, when the seismic action intensity is in an increasing trend, the interaction force between the high-altitude corridor and the towers on the two sides is in a decreasing situation, and the seismic isolation effect is improved. Due to the characteristic, the anti-seismic toughness and stability of the whole structure in earthquake disasters are remarkably improved, and reliable guarantee is provided for the safety performance of a high-rise building structure in a complex earthquake environment.

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 seismic isolation support traceability method, system and device based on a block chain, and the method comprises the steps: receiving the target installation information of a target support sent by a target mechanism, and obtaining a first traceability code and first installation information according to the target installation information; obtaining a first object corresponding to the first traceability code in a traceability block chain according to the first traceability code; obtaining a target object associated with the first object according to the first object and the first installation information; obtaining a target traceability code of the target support according to the target installation information; and according to the target traceability code and the target object, publishing a binding relationship between the target traceability code and the target object to the traceability block chain. The problems that an existing traceability system generally only comprises related data of production, detection and the like, lacks specific installation data, cannot be well cooperated with other systems such as a vibration monitoring and analysis system and is low in value are at least solved.

The invention relates to the technical field of building machinery, in particular to a pier column top shock insulation support mounting device and method. The device comprises a base, an inclined guide rail, a foldable guide rail, a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, an electric cylinder, a limiting plate, a meshing type pushing chain device and a camera. The method comprises the steps that guide rails are arranged on the two sides of a pier column, the device moves to the construction position along the guide rails, the shock insulation support is moved to the foldable guide rails, the foldable guide rails are adjusted to be horizontal, and the position of the shock insulation support is adjusted, installed and fixed. The mounting difficulty of the shock insulation support can be greatly reduced, the construction efficiency is improved, and the mounting quality is guaranteed.

The invention discloses a building seismic isolation and resistance device, and relates to the technical field of seismic isolation devices. The device comprises two supporting plates which are oppositely arranged up and down, and protruding plates are arranged on the opposite faces of the two supporting plates; the shock insulation layer comprises a protection rubber frame fixedly connected to the protruding plate, top plates are fixedly connected to the top of the protection rubber frame, the two top plates abut against each other oppositely, a plurality of laminated rubber plates are constructed in the protection rubber frame in the height direction of the protection rubber frame in an array mode, and a framework steel plate is wrapped between every two laminated rubber plates. The disc grooves are formed between the top plates, the oval limiting blocks are installed in the disc grooves, a part of load can be transferred to the oval limiting blocks when an earthquake occurs, earthquake energy is consumed through deformation of the oval limiting blocks and friction between the oval limiting blocks and the inner walls of the disc grooves, the load borne by the seismic isolation layer is effectively reduced, and the seismic isolation effect is improved. The anti-seismic bearing range of the device is widened, and the safety of a building is improved.

The utility model relates to a shock insulation seam decoration technology, in particular to a wall surface shock insulation seam decoration structure capable of being deformed in two directions, which comprises two vertical keels which are vertically arranged in parallel and a telescopic rod piece which is horizontally hinged between the two vertical keels, and the telescopic rod piece comprises a cross rod I and a cross rod II; the panel I and the panel I are respectively arranged on the cross rod I and the cross rod I, and the panel I is provided with an overlapping part which is movably attached to the front surface or the back surface of the panel I. According to the seismic isolation joint, due to the fact that the two panels are installed on the transverse rod I and the transverse rod I respectively, when the transverse distance between the wall bodies on the two sides changes, the panels can move along with the corresponding transverse rods, and the seismic isolation joint is kept shielded; besides, when the wall bodies are staggered front and back, the panel I and the panel I can deflect relative to the vertical keels (or the wall bodies) along with the corresponding rod pieces, so that the scheme can dynamically adapt to transverse changes and front-back dislocation changes of the wall bodies on the two sides of the seismic isolation joint in a bidirectional deformation mode, and a good decoration effect on the seismic isolation joint is kept all the time.

The invention provides a method for predicting the damage of a seismic isolation structure designed through a direct displacement method, and the method can be used for predicting the damage of the seismic isolation structure through the determination of a target value, the calculation of parameters of a seismic isolation layer and an upper building structure, the equivalence of a 2DOF model, and the extraction of 9 structure parameters and 13 seismic wave parameters of seismic waves from the design thought of the DDBD seismic isolation structure. According to the method, the vulnerability curve based on the target value can be quickly predicted through BO-XGBoost to intuitively guide the design of the seismic isolation structure of the DDBD, so that the method is quicker and more efficient, and is beneficial to perfecting the idea of the DDBD of the seismic isolation structure. The result shows that the prediction result is good, and good prediction precision can still be achieved under the condition of open set. A predicted vulnerability curve can be seen, and the predicted curve is close to real data and can be used as a reference for DDBD structure design. From a vulnerability curve, it can be seen that the DDBD design process can effectively enable the seismic isolation structure to reach an expected target under an earthquake.

The invention discloses a seismic isolation performance simulation detection method and system for a seismic isolation support and a storage medium, and relates to the technical field of seismic isolation performance detection.The method comprises the steps that geometric information of a target object is obtained, a hierarchical distribution diagram of the target object is determined, and a three-dimensional model of the target object is constructed; and performing dynamic performance detection on the target object, and determining a geometric dynamic model of the target object according to the three-dimensional model of the target object. According to the method, the three-dimensional model of the shock insulation support is constructed in advance, then the stress swing condition of the shock insulation support is collected, and the model swing image of the shock insulation support is made, so that the stress buffer condition of the shock insulation support is judged, then judgment information is preset according to the detection requirement of the shock insulation support, and the detection accuracy of the shock insulation support is improved. Therefore, whether the stress buffering condition of the shock insulation support meets the actual use requirement or not is judged, and the purpose of detecting the forming quality and performance of the shock insulation support is achieved.

The present invention relates to the field of three-dimensional seismic isolation technology, specifically a vertical variable stiffness three-dimensional seismic isolation bearing, comprising a laminated rubber seismic isolation bearing, wherein the bottom surface of the laminated rubber seismic isolation bearing is connected to an upper connecting plate, a lower connecting plate is provided below the upper connecting plate, and vertical telescopic guide rods are evenly connected between the upper connecting plate and the lower connecting plate; a plurality of tracks are radially provided on the top surface of the lower connecting plate, each track is provided with a slider, and a spring mechanism is hinged on the slider, the spring mechanism is vertically provided and the top is hinged to the bottom surface of the upper connecting plate; a connecting rod is provided between the slider and the center position of the bottom surface of the upper connecting plate, and the two ends of the connecting rod are respectively hinged to the slider and the upper connecting plate. The laminated rubber seismic isolation bearing, track, spring mechanism and connecting rod can meet the engineering requirements of isolating horizontal and vertical seismic motions, have high vertical static stiffness and bearing capacity under static load, have variable stiffness under dynamic load, are lower than the static stiffness, and have good vertical low-frequency seismic isolation effect.

An anti-seismic grid framework system including a grid framework structure configured for supporting a load handling device operative to move one or more containers in a stack. The anti-seismic grid framework system includes a seismic isolation system for reducing seismic forces acting on the grid framework structure, wherein the grid framework structure is supported by the seismic isolation system, the seismic isolation system including a superstructure and a substructure, and at least one base isolation device disposed between the superstructure and the substructure such that the at least one base isolation device suppresses movement of the superstructure relative to the substructure in a seismic event.

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.

Some embodiments of the disclosure disclose a tuned damping method for seismic isolation of pile foundations in a deep-water long-span continuous rigid frame bridge, which relates to the technical field of shock absorption for bridge engineering structures. It solves the problem that the “pile foundation seismic isolation” of deep-water long-span continuous rigid frame bridges lacks a theoretical quantitative calculation method, making it impossible to fully exert the effect of “pile foundation isolation”. The present disclosure includes: simplifying a deep-water long-span continuous rigid frame bridge model into a 2-degree-of-freedom dynamical model; setting an optimization objective function based on the 2-degree-of-freedom dynamical model; performing parameter optimization based on the optimization objective function; and determining structural seismic parameters of the deep-water long-span continuous rigid frame bridge based on parameters optimized in step 3.

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.