96 results about "Seismic protection" patented technology

A negative stiffness device and method for seismic protection of a structure is described. In one embodiment, the device has an anchor frame and a movement frame laterally translatable relative to the anchor frame. The anchor frame and movement frame have respective extension portions. A linkage is pivotably connected to the extension portion of the anchor frame. A compressed spring has a first end is attached to the extension portion of the movement frame and a second end attached to the linkage. The compressed spring has a spring force. In a rest state, the compressed spring does not apply a lateral force to the movement frame. In an engaged state, the compressed spring is configured to apply a lateral force to displace the movement frame in a lateral direction of a seismic load. The spring force is amplified by the linkage when the movement frame is laterally displaced to an amplification point.

Negative stiffness systems and methods for seismic protection of a structure is described. A system can include a negative stiffness device having a first linkage pivotably connected to an anchor frame at a first pivot point and pivotably connected the movement frame at a second pivot point. The negative stiffness device can include a spring having a first end operably coupled to the anchor frame and a second end operably coupled to a movement frame. In a rest state, the spring can be compressed to exert a preload force to the first linkage and the anchor frame and not displace the first linkage and the movement frame. In an engaged state, the spring can be configured to apply a force to the first linkage such that the movement frame is displaced in a same lateral direction of a seismic load. The spring force can be amplified by the first linkage.

The invention relates to an anti-seismic bridge support. The support comprises a first-stage anti-seismic shock-absorbing structure and a second-stage anti-seismic shock-absorbing structure, the first-stage anti-seismic shock-absorbing structure drives baffle rods to move upwards through the rotation of cams, and jacking rods cooperate with baffle blocks at the two sides of the lower portion of across beam to limit the horizontal displacement of the cross beam; the second-stage anti-seismic shock-absorbing structure drives first gears to rotate through the vertical displacement of the jackingrods in the baffle rods and then transmits the rotation to first bevel gears through retractable universal couplings, the first bevel gears are connected with second-stage anti-seismic devices to achieve bevel self-locking of pistons and pressing blocks, and therefore second-stage anti-seismic protection is achieved; meanwhile, through a bridge pier is protected through a linkage mechanism underthe cross beam; the anti-seismic bridge support limits the displacement of the bridge cross beam well, the beam falling risk is avoided, and the structural seismic damage and the structural damage degree are reduced; meanwhile, the anti-seismic bridge support achieves two-stage seismic protection, the anti-seismic capability of a bridge is greatly improved, the buffer protection capability of thebridge pier during an earthquake can also be improved, and the anti-seismic effect is remarkable.

The invention relates to a bridge anti-seismic and damping device. The device comprises a first grade anti-seismic and damping structure and a second grade anti-seismic and damping structure, the first grade anti-seismic and damping structure drives a stop lever to move upward through the rotation of a cam, and the cooperation of a top rod and check blocks at the two sides below a cross beam limits the horizontal displacement of the cross beam; the second grade anti-seismic and damping structure drives a first gear to rotate through the vertical displacement of the top rod in the stop lever and then transmits the rotation to a first bevel gear through a telescopic universal coupling, and the first bevel gear is connected with a second grade anti-seismic device to achieve the inclined slopeself-locking of a piston and pressing block to achieve the second grade anti-seismic protection; and the protection of a bridge pier is achieved through a link mechanism under the cross beam. The bridge anti-seismic and damping device has the advantages that the displacement of the bridge cross beam is limited very well, the risk of the beam falling is avoided, the structural seismic damage is reduced, the structural damage degree is reduced, two-stage earthquake protection is achieved, the seismic capability of the bridge itself is greatly improved, the buffering protective capability of thepier can also be strengthened when the earthquake occurs, and the earthquake resistant effect is significant.

The invention discloses an earthquake protection bed with high structural strength, which comprises a fixed bottom plate, top covers are rotationally connected to the two ends of the fixed bottom plate. The bottom of the end, away from the fixed bottom plate, of the top cover is rotationally connected with an inclined supporting plate. A rotating groove is formed in the top of the fixed bottom plate; a rotating bolt is fixedly connected to the inner wall of the rotating groove; the rotating bolt penetrates through the end, away from the top cover, of the inclined supporting plate and is rotationally connected with the inclined supporting plate. A locking table is fixedly connected to the end, close to the top cover, of the inclined supporting plate, a locking hole is formed in the bottom of the locking table, a fixing hole is formed in the inner wall of the locking hole, a lock catch device is slidably connected to the inner wall of the locking hole, and a hinge groove is formed in thetop of the end, away from the fixing bottom plate, of the top cover. The earthquake protection bed with high structural strength is safer and more comfortable to use, can effectively protect the lifesafety of users, and is simple in opening operation and higher in opening speed.

The invention discloses an anti-seismic and anti-falling type movable LED screen and a manufacturing method. The anti-seismic and anti-falling type movable LED screen comprises a base, a first spring, a first connecting shaft, anti-skid rubber, a limiting block, a limiting hole, a second sleeve, a second connecting shaft, a second spring, a gear, a limiting claw, a first telescopic rod, a third spring, damping rubber, a second telescopic rod, a fourth spring, a pulley, a connecting rod and a connecting block. The LED screen is safe and reliable, an anti-seismic protection structure is formed through cooperative use of the protection shell, the first telescopic rod, the third spring, the dustproof strip, the damping rubber, the second telescopic rod, the fourth spring, the pulley, the connecting rod and the connecting block, the LED screen is prevented from being damaged in the transportation and moving process, and through use of the anti-seismic protection structure, the LED screen is prevented from being damaged when falling down accidentally, and the service life of the LED screen is prolonged; The manufacturing method of the LED screen is simple, the quality of the LED screen is guaranteed, meanwhile, the manufacturing cost is reduced, and popularization and application of enterprises are facilitated.

The present invention relates to an anti-seismic protection device (1) that can be installed in a home, comprising: —a base frame portion (2A) comprising at least four base tubular elements (21A) made of carbon fibre arranged in plan so as to constitute the vertices of a base rectangle, said tubular elements being connected to each other by means of tubular base frame beams (23 A) made of carbon fibre, arranged to form diagonals of the base rectangle, —a shower tray (3) coupled to said base frame portion (2A) provided with a water drainage hole, —a cap frame portion (2B) comprising at least four cap tubular elements (21B) made of carbon fibre arranged in plan so as to constitute the vertices of a cap rectangle, said tubular elements being connected to each other by means of tubular cap frame beams (23B) made of carbon fibre, said second tubular cap frame elements (23B) being arranged to form diagonals of the cap rectangle, wherein each tubular cap element (21B) in operating condition is placed on the vertical of a corresponding base tubular element (21A), spaced therefrom —an intermediate frame portion (2C) comprising four tubular uprights (21C) that can each be coupled at an opposite free end to one of the four base tubular elements (21A) and to the corresponding cap tubular element (21B) placed on the vertical, and wherein the intermediate frame portion (2C) further comprises at least three peripheral walls (22C), each peripheral wall (22C) extending between two neighbouring uprights (21C) —a water dispenser coupled to the cap frame portion (2B) or to the intermediate frame portion (2C), such that the anti-seismic protection device (1) can be used as a shower cabin.

The invention relates to a density gradient anti-seismic building structure, and belongs to the technical field of building structure anti-seismic projects. The density gradient anti-seismic buildingstructure comprises an excavated foundation, anchor rods and density gradient materials, wherein the density gradient materials are fixed to the foundation slope and the inherent base plane of the foundation through the anchor rods. The corner positions of the density gradient materials are bonded, welded or connected through bolts. The density gradient materials are composed of nonmetal-nonmetal,nonmetal-metal or metal-metal. The density gradient materials at least comprise four levels including first-level density materials, second-level density materials, third-level density materials andfourth-level density materials. According to the density gradient anti-seismic building structure, anti-seismic protection is directly implemented on the building structure foundation slope and the inherent base of the foundation, the complex technology that anti-seismic materials are added in a building structure is avoided, consumption of the anti-seismic materials is reduced, the self weight ofthe building structure is not changed, and the integral safety of the building structure can be better improved.