742 results about "Seismic isolation" patented technology

The invention described is a system for seismic isolation or vibration of structures which is simple, relatively inexpensive and readily used for smaller structures. It involves use of bearings comprising a ball (10) and ball seats (12, 18) interposed between the structure and its foundation. Either the ball itself (24) or the seat surface (15) on which it rolls is compressible, the resistance to that compression providing a frictional braking force resisting rolling of the ball. This serves to dampen relative movement between the structure and its foundation. There are described several alternative constructions of the friction ball which is the preferred central element in the bearing device. There may be a plurality of balls (44, 47) in each combination of balls and seats.

An inventive method is presented for a sliding pendulum seismic isolation system that reduces seismic forces on the supported structure and reduces the costs of the isolation bearings, seismic gaps, and supported structural frame. The inventive method is to configure the isolation system to achieve increased effective friction with increased displacement amplitudes, and to employ specific bearing configurations that suit the different types and magnitudes of loads present at particular structure support locations. Three bearing configurations are presented which are comprised of multiple sliders that slide along different concave spherical surfaces, each constituting an independent sliding pendulum mechanism having a specified pendulum length and friction. Two bearing configurations are presented which are comprised of multiple sliders that slide along different concave or convex cylindrical surfaces, one configured to carry both compression and tension loads, and one configured to be cost-effective for carrying light compression loads and accommodating large displacements.

Disclosed is a resettable roll-in type swinging seismic-isolation pier stud with flanges. The resettable roll-in swinging seismic-isolation pier stud is of a resettable seismic-isolation structure. The seismic-isolation pier stud comprises a main beam, piers, bearing platforms, semi-protruding spherical pier bottoms, pier flanges, rubber spacers, hollowed semispherical bearing platform tops, shape memory alloy shear bolts and oblique-section stoppers. The fixed connection of the piers and the bearing platforms is changed into swingable hinge connection. The spherical pier bottoms of the piers are embedded in the hollowed hemispheres of the bearing platform tops. The pier flanges are arranged on two sides of the upper portions of the spherical pier bottoms and are in anchorage connection with the bearing platforms via the shape memory alloy shear bolts. The rubber spacers are arranged between the semi-protruding spherical pier bottoms and the hollowed semispherical tops and between the bearing platforms and the pier flanges as well as between the sides of the pier flanges and the bearing platform stoppers. The pier stud is separated from the foundation, and seismic energy can be filtered by swinging, so that the piers and the foundation are protected. The resettable roll-in type swinging seismic-isolation pier stud has excellent social and economic benefits and worthy of popularization and application.

A seismic isolation bearing comprises a lower plate, an upper plate, and a cylindrical roller in rolling contact with an upwardly facing bearing surface of the lower plate and a downwardly facing surface of the upper plate. The lower plate is fixable to a base, while the upper plate is fixable to a superstructure, for example a bridge deck. One or both bearing surfaces are sloped to form a central trough at which the cylindrical roller resides under normal weight of the superstructure, and toward which the roller is biased when relative displacement between the lower and upper plates occurs to provide a constant restoring force. A pair of sidewall members are fixed to the lower plate to withstand strong forces directed laterally with respect to the isolation axis along which rolling displacement occurs, and a pair of sliding guides carried one at each end of the roller provide dry frictional damping as they engage an inner wall surface of a corresponding sidewall member. The isolation bearing preferably comprises a locking mechanism that prevents relative displacement under normal non-seismic horizontal loading, but allows the bearing to function as intended under seismic loading. Visco-elastic or viscous dampers, linear springs, and nonlinear springs such as hardening springs are preferably mounted between the lower and upper plates to reduce bearing displacement, dissipate energy, and otherwise adjust periodic motion characteristics of the bearing. Further embodiments providing isolation along orthogonal X and Y axes are also disclosed.

The invention relates to a spring rubber vibration-isolation hanger used for vibration reduction and noise reduction of heating ventilation pipes, which is installed on the indoor top of a building. The hanger includes a first frame, a vibration isolation pad laid on the inner wall of the first frame and tightly wrapping the abdomen of the heating ventilation pipe, and two sets of suspension vibration isolation components. The first frame includes a U-shaped pipe clip and a crossbeam located below the heating and ventilation pipe and fixedly connected to the opening end of the U-shaped pipe clip to form a closed frame structure with the U-shaped pipe clip. The suspension vibration isolation assembly includes an upper suspension rod, a spring vibration isolator and a lower suspension rod connected vertically in sequence. The invention can not only play a good role in vibration isolation and shock resistance for the whole heating and ventilation pipe, but also can play a good role in vibration isolation and noise reduction for the local air pipe, and is especially suitable for the main control room of the nuclear power plant and the film and television workstation, etc. It is suitable for occasions that have higher requirements for indoor equipment safety and acoustic environment.

The invention provides a self-resetting friction pendulum three-dimensional seismic mitigation and isolation support. A concave blind hole is formed in the center of a lower support plate (4); a seismic reduction layer (7) and vertical seismic reduction springs (8) are arranged on the bottom of the concave blind hole; upper parts of the vertical seismic reduction springs (8) are connected to a spherical surface slide plate (3); a hinge slide block (2) is arranged on the top of the spherical surface slide plate (3); an upper spherical surface of the hinge slide block (2) is positioned in a slide block accommodation chamber (12) under an upper support plate (1); a counter-force plate (6) is arranged on the periphery of the upper part of the lower support plate (4); and horizontal seismic reduction springs (5) are positioned between the counter-force plate (6) and an outer peripheral wall of the slide block accommodation chamber (12). The self-resetting friction pendulum three-dimensionalseismic mitigation and isolation support is of a circular structure; the horizontal seismic reduction springs and the vertical seismic reduction layer can improve the durability and the seismic isolation performance of the friction pendulum seismic mitigation and isolation support; and the horizontal seismic reduction springs can fully play the energy-dissipating capacity of the counter-force plate, and can achieve three-dimensional seismic mitigation and isolation of the support under the action of extreme loads such as earthquakes and typhoon.

The invention provides a novel three-dimensional seismic isolation device which comprises a horizontal seismic isolation component, a transition steel structural platform and a vertical seismic isolation component. The horizontal seismic isolation component is fixedly connected with the vertical seismic isolation component by the transition steel structural platform; and the vertical seismic isolation component comprises an upper sleeve, a lower sleeve, a lower bottom plate, a belleville spring, a middle guide rod and viscous damping fluid. The novel three-dimensional seismic isolation device is simple and convenient to manufacture and is convenient to construct, install and maintain; horizontal damping and vertical damping are decoupled mutually and are not involved mutually. Due to adoption of the belleville steel plate spring, the novel three-dimensional seismic isolation device has low vertical stiffness when vertically moving, so that the vertical period of an upper structure is prolonged and the earthquake action is reduced; and meanwhile, a good viscous hole is formed by a gap between the belleville spring and the lower sleeve for the viscous damping fluid in the lower sleeve and a butterfly steel plate takes an effect of a piston in a viscous damper, so that the vertical earthquake action is further reduced by energy dissipation and safety of the upper structure is ensured.

A bi-directional sliding pendulum seismic isolation system for reducing seismic force acting on a structure by sliding pendulum movements, each system comprising a lower sliding plate forming a sliding path in a first direction, an upper sliding plate forming a sliding path in a second direction, and a sliding assembly for reducing the seismic force of the structure by performing a pendulum motion by sliding along the lower and upper sliding plates.

A seismic isolation bearing assembly includes a frame unit including upper and lower frames and defining a plurality of upper and lower sub-frames, and a plurality of bearing units, each of which is mounted in a mounting cell defined by a respective one of the upper sub-frames and a respective one of the lower sub-frames, and each of which includes spaced apart upper and lower load plates and a bearing interposed between and in sliding contact with the upper and lower load plates. The upper load plate is secured to the respective one of the upper sub-frames. The lower load plate is secured to the respective one of the lower sub-frames.

A seismic isolation bearing comprises a lower plate, an upper plate, and a cylindrical roller in rolling contact with an upwardly facing, bearing surface of the lower plate and a downwardly facing surface of the upper plate. The lower plate is fixable to a base, while the upper plate is fixable to a superstructure. One or both bearing surfaces are sloped to form a central trough at which the cylindrical roller resides under normal weight of the superstructure, and toward which the roller is biased when displacement between the plates occurs. A pair of sidewall members are fixed to the lower plate to withstand strong forces directed laterally with respect to the isolation axis along which rolling displacement occurs, and a pair of sliding guides carried one at each end of the roller provide dry frictional damping as they engage an inner wall surface of a corresponding sidewall member.

The invention relates to a three-way seismic isolation pedestal with two-way guide rail disc springs. The three-way seismic isolation pedestal comprises a base plate, a bottom plate horizontal seismic isolation device, a middle plate vertical switching device, an upper plate vertical seismic isolation device, a steel box and a top plate, wherein the bottom plate horizontal seismic isolation device is fixed on the base plate; the bottom plate horizontal seismic isolation device is connected with the upper plate vertical seismic isolation device through the middle plate vertical switching device; the upper plate vertical seismic isolation device is connected to the periphery of the steel box; the steel box is connected to the lower part of the top plate. According to the invention, the aims that the vertical earthquake action is reduced while the horizontal seismic isolation can be realized are achieved, the input energy of three-way earthquake can be weakened through a damping device, seismic isolation protection can be provided for the structure requiring earthquake reduction and isolation in both the vertical direction and the horizontal direction, and the transmission path of the earthquake action towards protected equipment or cultural relics in the collection of cultural institutions can be cut off or weakened, so that the purposes of protecting structures, equipment or the cultural relics in the collection of cultural institutions through reducing the earthquake input energy can be achieved.

To provide a seismic isolation device, even if a relative height between friction plates, which are laminated in a hollow part of a laminated rubber body, and the laminated rubber body changes at a deformation of the laminated rubber body, which prevents allophone, vibration and shock from inside of the seismic isolation device (laminated rubber body), resulting superiority in durability, safety, and amenity. The seismic isolation device comprising: a laminated rubber body 2 in which elastic material layers 2b and rigid material layers 2c are vertically laminated one after the other; a plurality of friction plates 3 vertically laminated so as to be horizontally slidable and wholly enclosed in a hollow part 2a vertically penetrating the laminated rubber body; pressurizing means 4A, 4B arranged at a topmost portion and/or at a lowermost portion of the laminated friction plates and vertically adding pressure; and a friction reducing means 5 arranged between each outer peripheral portion of the plurality of the friction plates and an inner peripheral surface of the hollow part of the laminated rubber body. Even if a relative height of the friction plates and the inner peripheral surface of the hollow part of the laminated rubber changes, the friction reducing means smoothens the slide between them.

The invention relates to a multilayer rubber laminated isolation bearing which mainly comprises an upper connecting plate, a lower connecting plate, a laminated rubber elastic body, a steel sheet and a lead core rod, wherein the laminated rubber elastic body and the steel sheet are clamped between the upper connecting plate and the lower connecting plate, and the lead core rod is sealed at the center of the laminated rubber elastic body. Lead cores are poured into a laminated rubber bearing, a plurality of thin rubber layers are laminated to form the laminated rubber elastic body clamped between the upper connecting plate and the lower connecting plate, multilayer rubber is laminated to form a rubber interlayer, so that the initial rigidity and the yield strength of the isolation bearing are improved, the isolation bearing can function in seismic isolation and absorption for house buildings, bridges, precise instruments and the like, horizontal equivalent rigidity is enlarged, horizontal displacement of the isolation bearing is enlarged when an earthquake occurs, the damping property of the bearing is improved, and energy generated by the earthquake is reduced by the aid of horizontally bilateral displacement, so that seismic isolation and absorption are realized.

The invention relates to an installation underpinning method for an existing framed building reinforced by parallel seismic isolation supports, which belongs to the field of seismic isolation reinforcement. The installation underpinning method includes manufacturing upper brackets and lower brackets between a foundation and a sill of a multilayer frame structure and installing the seismic isolation supports; cutting off reinforced concrete columns among the seismic isolation supports after the concrete strength of the brackets reaches a designed value; safely transferring load on the structure columns onto the seismic isolation supports; and accordingly achieving the designed purpose of seismic isolation of the existing framed building. By the aid of the method, structural safety of underpinning construction is guaranteed, engineering progress is simplified and accelerated, construction devices and underpinning components are saved, accordingly, engineering manufacturing cost is lowered, and the installation underpinning method is extremely practical framed foundation seismic isolation construction technique.

The invention discloses a rope type self-reset shape memory alloy seismic isolation and seismic reduction support, and belongs to the technical fields of an architectural structure and mechanical engineering. A transverse anti-seismic cylinder tube (1), a transverse anti-seismic sliding passage (2), a connecting rod (3), a vertical anti-seismic cylinder tube (4), a vertical anti-seismic piston (5), a common biasing spring (6), a transverse anti-seismic alloy wire rope (7), a vertical anti-seismic alloy wire rope (9) and a fixing upright post (13) are added on the basis of an original structure. According to the rope type self-reset shape memory alloy seismic isolation and seismic reduction support disclosed by the invention, the self-reset capacity in the transverse direction is obtained while the self-reset capacity in the vertical direction is obtained, the self-reset capacity in the transverse direction and the self-reset capacity in the vertical direction are reasonably combined, and multidirectional seismic isolation and seismic reduction is obtained while the energy dissipation stability of multidirectional seismic isolation and seismic reduction of the rope type self-reset shape memory alloy seismic isolation and seismic reduction support is increased; meanwhile, the use is wide, the rope type self-reset shape memory alloy seismic isolation and seismic reduction support not only can be independently used as a tensile and compressive damper, but also can be independently used as a shear-resisting damper, and the rope type self-reset shape memory alloy seismic isolation and seismic reduction support has a wide market prospect.

The invention provides a composite three-way intelligent shock-isolation bearing, which is suitable for building construction, bridges, bases of important cultural relics and other different shock-isolation systems. The upper part of the six shape memory alloys is connected to the prismatic steel top plate through the fixed sleeve, and the lower part is connected to the prismatic steel bottom plate sprayed with damping materials. At the same time, the six disc springs on the prismatic steel bottom plate and the intelligent friction plate jointly support the prismatic steel top plate. When the bearing is subjected to a horizontal earthquake, the upper and lower steel plates move horizontally relative to each other, and the shape memory alloy provides a large restoring force, and drives the friction disc to change the anchoring force of the bolt through the electric deformation of the piezoelectric driver, and exerts intelligent adjustment of the horizontal friction Energy dissipation; when the support is subjected to a vertical earthquake, the disc spring bears the load and deforms, and stores a certain potential energy to consume the vertical earthquake force. The composite three-way intelligent shock-isolation bearing of the invention can effectively solve the three-way shock-isolation problem of structures, and provide guarantee for the safety of building structures and the protection of important cultural relics.

A construction method of a limiting and self-resetting rubber-sliding seismic isolation bearing comprises the steps that (1) a steel plate is embedded in the position, where a seismic isolation cushion needs to be put, of a seismic isolation layer foundation; (2) a rubber bearing is connected to the embedded steel plate through bolts; (3) reinforced concrete check blocks are formed through pouring at the portion of the seismic isolation layer foundation according to the horizontal displacement of a seismic isolation structure under the earthquake function; (4) teflon sliding materials are pasted to the top of the rubber bearing and the lower portion of the seismic isolation structure to form sliding layers, and the sliding layers adopt a coulomb friction force model; and (5) in order to reduce horizontal displacement of the structure, shape memory alloy helical springs in a large size are arranged between the check blocks and the structure and connected to concrete through embedded parts. The shape memory alloy helical springs not only have the limiting function, but also can achieve the self-resetting function after an earthquake is over due to the shape memory effect of the material, thereby greatly reducing residual displacement of the structure and ensuring post-quake normal use of the structure.

The invention relates to a vertical variable-rigidity seismic isolation bearing, belonging to the field of structure ventilating control. The bearing comprises steel tubes, rubber, a lead core, a variable-rigidity guiding device. The variable-rigidity guiding device includes a shaft, a top plate and tapered variable-rigidity curve plate, wherein the upper end of the shaft is fixedly connected with the top plate, one end of the tapered variable-rigidity curve plate is fixedly connected with the top plate, the other end is fixedly connected with the side surface of the shaft, multiple layers of rubber and multiple steel tubes are alternatively arranged on the shaft below the variable-rigidity curve plate, the lead core arranged horizontally intersects with the shaft through the multiple layers of rubber and the multiple steel tubes, the lower end surfaces of the rubber and the steel plates form a tapered space having a small upper end and large lower end. The bearing has large initial rigidity and small yield rigidity in the vertical direction, and has enough vertical deformability and reset ability, after the lead yields, the vertical seismic isolation rigidity can be adjusted according to the vertical deformation, thus vertical earthquake can be effectively insulated, and the bearing the stable when no earthquake occurs.

The invention belongs to the technical field of structural engineering, and particularly relates to a mixed integrated high-rise structural system, which comprises main towers 1, connectors 2 in a strong connection mode and connectors 3 in a weak connection mode. The mixed integrated high-rise structural system is characterized in that each main tower 1 is a tube structure or a frame and core tube structure with symmetric rigidity and mass arrangement, each connector 2 in the strong connection mode is a spatial truss consisting of horizontal steel truss arranged along a floor and vertical diagonal web members jointly, the spatial trusses are reliably and rigidly connected with the core tube structures of the main towers, each connector 3 in the weak connection mode is a single-layer light steel truss connected with the corresponding main tower by seismic isolation supports, and a sufficient space is reserved between each connector and the corresponding tower, so that the connectors are prevented from being collided with the towers under effects of severe earthquake. The mixed integrated high-rise structural system is applicable to a high-rise structural system with multiple connectors, has a series of advantages of large structural rigidity adjustment range, low integral structural deformation, high earthquake energy dissipation capacity, convenience in repair after the earthquake and the like, and is a superior integrated high-rise structural system.

A multidimensional seismic isolation layer/belt structure applicable to a multilayer construction foundation is characterized in that in the multidimensional seismic isolation structure, a seismic isolation layer is arranged at the bottom part of a building (between a ground base and a foundation) to prevent seismic waves; a slipping seismic isolation layer is arranged between the upper part of the building foundation and a foundation ring beam, so that seismic horizontal shear waves can be absorbed and relieved through slippage; meanwhile, a seismic isolation belt is arranged between the periphery of the building foundation and the soil layer to absorb and relieve the seismic horizontal waves, so that the seismic isolation layer arranged below the foundation and the slipping isolation layer arranged above the foundation can act together with the seismic isolation layer at the periphery of the foundation to prevent the acceleration peak value transmitted to the building and the predominant period leaving the site, influences of the seismic waves on the building are significantly reduced, and further the purposes of protecting house structure and equipment in the house from being damaged by the seismic and guaranteeing lives and safety of personnel in the house are achieved.

The utility model relates to a multifunctional bridge shock-absorbing and isolating support, which is composed of upper and lower parts. The upper part is composed of PTFE plate sliding bearings, which can realize the free expansion and displacement of the main beam structure under conventional loads, and thus have all the characteristics of conventional sliding bearings. The lower part is a combined shock-absorbing and isolating device with multi-level shock-absorbing and isolating functions, which is composed of a lead rubber pad in the middle part and an elastic-plastic energy-dissipating soft steel plate in the peripheral part. A lead core is arranged in the middle of the lead core rubber pad. Under earthquake action, lead rubber pads and elastic-plastic energy-dissipating steel plates are used to jointly dissipate energy to effectively limit the relative displacement between beams and piers. A rigid connection is made between the sliding support of the polytetrafluoroethylene plate and the combined shock-absorbing and isolating device to ensure the joint work of the upper and lower parts of the device. With the worldwide emphasis on the anti-seismic fortification of engineering structures and the continuous development of the economic level, this new type of bridge anti-seismic bearing will have a wide range of engineering application prospects.

The present invention is intended to provide a seismic isolation device which, regardless of a load to be supported, is capable of reducing acceleration through lengthening a natural period of an upper structure, with excellent vibration energy absorbing capacity by obtaining a properly preferable frictional force as well as a returning characteristic, and others.