81results about How to "Prevent falling beams" patented technology

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.

The invention provides a double-column type swinging shock-insulation bridge pier structure system and belongs to the field of bridge engineering. The structure system is mainly composed of an upper structure, a reinforced concrete bridge pier section and a steel pipe concrete bridge pier section, a bearing platform, a steel pipe concrete bolt pin, a non-binding pre-stress steel bar and the like. The steel pipe concrete bridge pier section is connected with the upper structure through the non-binding pre-stress steel bar; and with the help of an external energy consumption device and a metal annular object, the shock-insulation effect and the self-resetting capability of a bridge structure can be effectively provided. The structure system designed by the invention has a definite stress mechanism; under the condition of ensuring that the structure system has enough intensity and rigidity, the earthquake effect borne by the structure is reduced, and the effective energy consumption capability and self-resetting capability can be provided; and the problems of a traditional double-column type bridge pier structure system that a support is replaced in a life period and the system is seriously damaged and has large residual deformation after the earthquake effect can be solved.

The invention belongs to the technical field of spherical steel support seats, in particular to an elastic-plastic beam dropping prevention spherical steel support seat. The invention adopts the technical scheme that a press plate forming an integral structure with an upper slide plate is arranged on the upper slide plate positioned outside the outer side wall of a first slide rail; an elastic-plastic column is arranged on a bottom plate; the top end of the elastic-plastic column is butted below the press plate; a second slide rail along the limiting direction of the support seat is arranged on the bottom plate at the outer side of the base; and the edge of the base is clamped into the second slide rail. After being sheared by a shear force pin, the elastic-plastic column generates elastic deformation so as to reduce the horizontal shearing force; and along with the increase of the force, the elastic-plastic column generates plastic deformation so as to further reduce the horizontal shearing force, thereby preventing a beam dropping phenomenon caused by an earthquake or bridge surface impact.

The invention relates to the technical field of earthquake prevention and discloses a self-resetting seismic isolation support. The support comprises an upper connecting plate, a lower connecting plates, guide channels, SMA (shape memory alloy) stranded wires, high-damping rubber bodies and rubber stacked steel plates, wherein multiple guide channels penetrate through the upper connecting plate and the lower connecting plate, SMA stranded wire groups penetrate through the guide channels and form annular closed accesses, the high-damping rubber bodies and the rubber stacked steel plates are connected between the upper connecting plate and the lower connecting plate in a layered and staggered manner, and the vertical rigidity of the support can be effectively increased. The SMA stranded wires can increase the lateral rigidity of the support and improve the shear capacity of the support under the action of small earthquakes and dissipate a lot of earthquake energy after yielding under theaction of large earthquakes, and the resetting capacity of the support after earthquakes can be realized by the aid of superelasticity of the SMA stranded wires; the SMA stranded wires enhance the energy dissipation capacity and stability of the support and remarkably improve the seismic isolation effect of the structure; a limit role can be played and beam falling can be prevented.

The invention discloses a replaceable limiting and locking damping energy consumption device and belongs to the field of civil engineering and mechanical engineering. A web plate and flanges of welding joint steel (1) are cut to be replaced with metal compound energy consumption plates (2); two ends of the welding joint steel (1) are connected with horizontal partition plates (3), and the partition plate at one end is connected with a clamping slot box (7); the side wall of one side of the clamping slot box (7) is provided with a protruded interlocking clamping plate (9); a side wall which is opposite to the side wall provided with the interlocking clamping plate (9) is provided with a slot which extends into a self-locking clamping plate (6); the self-locking clamping plate (6) is a steel plate of which the end is gradually protruded and the middle is provided with an opening; and the opening of the self-locking clamping plate (6) is opposite to a bulge of the interlocking clamping plate (9). In earthquake, after the structural deformation exceeds an expected value, a bridge pier and a beam body are locked, and the connection mode is changed by a self-locking device, the deformation of a main body structure is reduced, and the condition that a beam of a bridge falls and the bridge is damaged can be avoided; and the replaceable limiting and locking damping energy consumption device is simple in structure, can effectively prevent the beam from falling off and has good energy consumption capacity.

The invention belongs to the technical field of bridge supports and discloses a pulling pressing beam-falling-resisting seismic-isolation-and-reduction support. According to the technical scheme, the structure of the support comprises an upper base plate, a bottom plate and a sliding part clamped between the upper base plate and the bottom plate. The bottom plate is composed of a concave ball / a cylindrical surface body. The sliding part is composed of a rotating body and a hyperbolic ball / a cylindrical surface body. A periphery circle concave-convex structure is placed between the upper portion of the rotating body and the upper base plate and forms a sliding anti-pulling structure with a plane sliding pair. The lower portion of the rotating body is of a curve ball / cylindrical surface structure. The hyperbolic ball / the cylindrical surface body is clamped between the rotating body and the bottom plate and forms a corresponding curve surface sliding pair through the rotating body and the bottom plate. An anti-pulling sliding pair mechanism is arranged between the rotating body and the bottom face of the bottom plate. When the support of the structure is under the effect of vertical pulling force, collision of parts of the support is avoided. During an earthquake, a seismic-isolation-and-reduction function is achieved, and a bridge, the support and a pier are kept together all the time.

The invention provides a tension-resisting anti-beam-falling combined shock insulation device and a construction method thereof. The tension-resisting anti-beam-falling combined shock insulation device is characterized by including lead core rubber shock insulation supporting bases used for preventing horizontal falling of beams and tension-resisting devices used for vertical tension resisting; the lead core rubber shock insulation supporting bases are connected between bridge piers and main beams, one end of each tension-resisting device is fixed on the lower bottom surface of the corresponding main beam, the other end of each tension-resisting device is fixed on the top surface of the corresponding straining beam, the tension-resisting devices include upper U-shaped steel members and lower U-shaped steel members, and the upper-portion U-shaped steel members and the lower-portion U-shaped steel members are connected through left hand threads. The tension-resisting anti-beam-falling combined shock insulation device not only can achieve the function of preventing horizontal falling of beams, but also can meet the need of vertical tension resisting, the system is clear, the stress is clear, and the structure is simple; the device is economical and practical, and has good tension-resisting, anti-beam-falling and shock insulation effects and good applicability in the design of bridges in a high intensity earthquake zone.

The invention discloses a girder falling prevention structure capable of achieving gradual telescopic energy consumption. The girder falling prevention structure comprises a box girder and a limiting bridge pier arranged at the end of the box girder; the limiting bridge pier is provided with a partition body and a telescopic mechanism, the partition body is arranged in the transverse direction of the box girder and is used for partitioning two longitudinally-connected box girders, the telescopic mechanism is arranged on the side face of the partition body, and the box girder is arranged on the limiting bridge pier through the telescopic mechanism; limiting structures are correspondingly arranged on the box girder and the limiting bridge pier, transverse-longitudinal restraint of the box girder on the limiting bridge pier is achieved through mutual embedding and partitioning of the box girder and the limiting bridge pier, girder falling of the box girder in the transverse direction and the longitudinal direction in an earthquake is effectively prevented, therefore, a bridge can continue to be used and keep smooth after the earthquake, and personnel injuries and property losses which are brought by the earthquake are reduced and even eliminated.

The invention discloses a device for preventing a beam type bridge from overturning. The device comprises a plurality of overturning preventing units arranged on the two sides of the beam type bridge.Each overturning preventing unit is connected with the main beam and the corresponding pier stud. Each overturning preventing unit comprises a first part and a second part which are connected with the main beam or the corresponding pier stud respectively; the first part comprises a core rod, a limiting block and a first anchoring block; one end of the core rod is provided with a first anchoring block and the other end is provided with a limiting block; the second part comprises a stop block and a second anchoring block; a through hole matched with the cross section of the core rod is formed in the stop block; a gap is formed between the core rod and the inner wall of the through hole; the stop block is connected with the corresponding pier stud or the main beam through the second anchoring block; the limiting block is tightly attached to the stop block to restrain the relative position between the first anchoring block and the second anchoring block. According to the method, the problem of overturning reinforcement of an existing beam type bridge can be solved, the situation that too complex structural measures are adopted for preventing the bridge from overturning can be avoided,and therefore the construction cost of the structure is reduced.

The invention relates to a connection mode of a pier and a bearing platform through additional mild steel dampers, and belongs to the field of bridge engineering. According to the connection mode, mainly a reinforced concrete pier section, a concrete-filled steel tube pier section and additional mild steel dampers are arranged, wherein the section of a concrete-filled steel tube is a reduced scale section, and the vertical bearing capacity of the concrete-filled steel tube section with the reduced scale section is not lower than that of the reinforced concrete section; the additional mild steel dampers are arranged between the top of the bearing platform and the bottom of the reinforced concrete section. Under the effect of earthquakes, the plasticity deformation of the pier is focused on the concrete-filled steel tube section, so that a plastic hinge release pier bottom bending moment is formed; besides, the reinforced concrete section swings around a hinge to stimulate the mild steel dampers to resist earthquake force and dissipate earthquake energy. The energy consumption characteristics of the mild steel dampers can have protective effects on the concrete-filled steel tube section, through reasonable design, the concrete-filled steel tube section can be used only with slight repair and maintenance after the earthquakes, the damage of the main structure of a bridge is small, the normal service of the bridge is not influenced, and the damaged mild steel dampers are convenient to exchange.

The invention discloses a bridge damping support and a damping method. The bridge damping seat comprises an upper seat board, a lower seat board, a spherical cap liner plate, a steel damping element with variable cross section, an upper anchor bar connected with the upper seat board, and a lower anchor bar connected with the lower sat board, wherein the spherical cap liner plate is connected between the upper seat board and the lower seat board, and the steel damping element with variable cross section is connected at two sides or the periphery of the upper seat board and the lower seat board;and the upper end of the steel damping element with variable cross section is connected with the upper seat board, and the lower end is connected with the lower seat board. By adopting the bridge damping support for damping, the steel damping element with variable cross section is arranged at the periphery or two sides of the upper seat board and the lower seat board to reduce the space utilization rate of the damping element; and in severe earthquake, the steel damping element with variable cross section can reduce vibration and energy consumption and limit the displacement of the bridge damping support, so as to achieve the aim of reducing bridge earthquake response and preventing bridge falling. According to the invention, not only can a function of normal use of the support be realized, but also a vertical drawing effect is achieved by the limited displacement and vibration reduction and energy consumption reduction of the support to prevent bridge falling in severe earthquake.

A friction pendulum isolation device includes a friction pendulum isolation bearing and a brake energy dissipation assembly, wherein the friction pendulum isolation bearing comprises an upper seat plate, a double spherical surface middle seat plate, a lower seat plate and a bottom plate which are overlapped from top to bottom, the center of the top surface of the bottom plate is provided with a sliding groove arranged along the fore-and-aft direction of the friction pendulum isolation bearing, the brake energy dissipation assembly includes brake baffles and elastoplastic energy dissipation components, the two elastoplastic energy dissipation components are symmetrically arranged on the left and right sides of the lower seat plate and parallel with the sliding groove, the elastoplastic energy dissipation components are fixedly connected with the middle position, along the direction of the sliding groove, of the bottom plate, the brake baffles are arranged on the outer side of the lower seat plate and are fixed between the two elastoplastic energy dissipation components, the brake baffles are arranged on the bottom plate in a manner of being in slide fit with the sliding groove, the lower seat plate slides along the sliding groove to push the brake baffles to slide along the sliding groove so as to generate the tensile force along the direction of the sliding groove for the elastoplastic energy dissipation component. According to the friction pendulum isolation device, the brake energy dissipation assembly has low space occupation rate, compact and stable structure, and can effectively prevent the bridge falling beam phenomenon.

The invention discloses a high-friction antivibration support and a preparation method of the high-friction antivibration support, belonging to the technical field of bridge supports. The high-friction antivibration support has the main technical characteristics that the high-friction antivibration support comprises a lower base plate, a middle base plate and an upper base plate, wherein a low-friction coefficient plane friction pair is arranged between the upper base plate and the middle base plate, a low-friction coefficient spherical friction pair is arranged between the middle base plate and the lower base plate, a bottom plate is arranged below the lower base plate, a high-friction coefficient plane friction pair is arranged between the lower base plate and the bottom plate, and a laminated rubber block is arranged between the upper base plate and the bottom plate. According to the high-friction antivibration support, the high-friction coefficient plane friction pair is mainly used for dissipating earthquake capability in the earthquake. When horizontal displacement is generated between the upper base plate and the bottom plate, the laminated rubber block generates shear deformation. Horizontal restoring force is provided through the laminated rubber block, lateral bearing stiffness of a series system of bridge piers and the support is smaller than that of bridge piers, so that the effects of prolonging the period and reducing the earthquake response can be achieved.

The invention discloses a two-direction energy dissipation beam falling prevention device, and belongs to the technical field of bridges. The two-direction energy dissipation beam falling prevention device comprises a main beam and a pier used for supporting the main beam. The main beam comprise a first main beam, a second main beam, a third main beam and a fourth main beam; the first main beam and the second main beam are arranged in parallel and are positioned on one side of the pier; the third main beam and the fourth main beam are arranged in parallel and are positioned on the other side of the pier; a sliding layer is arranged between the pier and the main beam, the lower end of the sliding layer is in transverse sliding matching and longitudinal sliding matching with the pier; and amulti-direction damping structure is arranged between the sliding layer and the pier. According to the present invention, with the application of the device in the bridge construction, the energy consumption can be effectively performed on the transverse direction and the longitudinal direction of the main beam during earthquake so as to avoid the occurrence of the beam falling.

The invention relates to an elastic-plastic structure damping support which comprises a supporting module and a damping module. The supporting module comprises an upper top plate, a spherical crown, amiddle lining plate and a lower bottom plate which are arranged in an overlapped manner from top to bottom, wherein sliding faces capable of moving relatively in the longitudinal direction of a bridge and the transverse direction of the bridge are machined between the upper top plate and the spherical crown and between the lower bottom plate and the middle lining plate correspondingly, and the spherical crown and the middle lining plate are in contact connection through a spherical face. The damping module comprises limiting energy consumption assemblies which are arranged in the longitudinaldirection of the bridge and the transverse direction of the bridge correspondingly, wherein the two ends of the limiting energy consumption assembly arranged in the longitudinal direction of the bridge are connected with the upper top plate and the spherical crown correspondingly, and the two ends of the limiting energy consumption assembly arranged in the transverse direction of the bridge are connected with the lower bottom plate and the middle lining plate correspondingly. Compared with the prior art, the elastic-plastic structure clamping support can adapt to telescopic deformation of a main beam under the temperature effect, circular ring parts have an energy consumption effect and a limiting effect, the problems of oil leakage, blockage and the like do not exist, demounting and mounting can be conducted according to practical needs, and daily support maintenance and post-earthquake replacement are facilitated.

The invention discloses a bridge anti-falling beam device capable of balancing transverse bending moment, and belongs to the technical field of building bridges. The bridge anti-falling beam device comprises a first longitudinal anti-falling beam assembly and a second longitudinal anti-falling beam assembly which are correspondingly positioned at the two sides of main beams. The first longitudinalanti-falling beam assembly and the second longitudinal anti-falling beam assembly are connected with a balance rod, the balance rod is located in a gap between the two adjacent main beams, installation bases are fixedly arranged on the end faces of the main beams, and the balance rod is rotationally connected with the main beams through the installation bases. When the two main beams generate displacement in the longitudinal direction, upper compression devices and lower compression devices get close to each other in the vertical direction, and the upper compression devices act on the balancerod through connecting rod assemblies to enable the balance rod to rotate by a certain angle. According to the bridge anti-falling beam device, through the linkage effect of the first longitudinal anti-falling beam assembly and the second longitudinal anti-falling beam assembly at the two sides of the main beams, beam falling can be effectively prevented.

The invention relates to a mechanical locking device used for a continuous girder bridge under an earthquake action. The mechanical locking device comprises an upper steel base plate (3), a lower steel base plate (4), a slide groove (6), a slide block (5) and slide block locking mechanisms; the upper steel base plate (3) is fixed at the bottom of a girder body (1); the lower steel base plate (4) is fixed at the top of a movable pier (2); the slide groove (6) is fixedly arranged on the lower steel base plate (4); the slide block (5) is arranged in the slide groove (6), and the top of the slide block (5) is fixedly connected with the upper steel base plate (3); and the four slide block locking mechanisms are arranged to form a rectangular shape, are arranged on the outer side of the slide groove (6) and stretch into and out of the slide groove (6) along a sliding direction vertical to the slide block (5). Compared with the prior art, the mechanical locking device has the advantages that the inertia force of the girder body (1) is reasonably distributed in an earthquake process, relative displacement of a pier girder is limited, the girder is prevented from falling, the cost is low, and the repairing is simple after the earthquake and the like.

The invention discloses a bridge-limited energy dissipation type seismic mitigation and isolation bearing and a production method and belongs to the technical field of bridge bearings. The bearing comprises an upper bearing plate, a bearing basin and a seismic mitigation and isolation module. The upper bearing plate is arranged on the bearing basin, the periphery of the upper bearing plate is provided with the seismic mitigation and isolation module composed of an outer steel plate, a high damping rubber block and an inner connecting steel plate, the high damping rubber block is arranged between a perpendicular plate in the outer steel plate and the inner connecting steel plate. A limit stopper which restricts the horizontal direction of the outer steel plate and is arranged on the periphery of a bearing basin plate and close to the inner side of the perpendicular plate, when the limit bolt is cut by the exogenic process, the outer steel plate restricts the relative displacement of a pier beam and the high damping rubber block plays roles of shock absorption and certain self-resetting ability by the energy consumption of cutting and tension and compression deformation. The most major advantage of the bridge-limited energy dissipation type seismic mitigation and isolation bearing and the production method is the integration of the limit function of the pier beam in the traditional spherical bearing or a pot bearing, and the design, the construction difficulty and the economic cost of post-earthquake repair are reduced.

The invention relates to the technical field of bridges, and particularly discloses a variable-damping anti-falling beam structure. The variable-damping anti-falling beam structure comprises a bridgepier, a first main beam and a second main beam, a partition plate support is arranged between the first main beam and the second main beam. A first damping structure is arranged between the first mainbeam and the second main beam; the partition plate support is connected with the pier through a second damping structure. The first damping structure comprises a first energy consumption strip-shapedplate, a second energy consumption strip-shaped plate and a pressing mechanism. The first energy dissipation strip-shaped plate is fixedly arranged on the end face of the first main beam. According to the variable-damping anti-falling beam structure, the damping rigidity of energy consumption of the device can be adjusted according to season requirements, so that the device can be kept in a goodworking state all the time, and bridge falling is prevented.

The invention discloses a one-way energy consumption collapse-proof device, which includes a bottom plate. At least one corrugated plate is mounted on the bottom plate; sections of all corrugated plates are in wavy configuration with the same extending direction of the corrugated plates, and blocking plates are correspondingly arranged at the two sides of wave peaks and wave troughs of the corrugated plates; all blocking plates are connected with the bottom plate, and two ends of the corrugated plates are connected with the bottom plate which is used for connecting with piers; limiting groovesare formed in the plate body of the corrugated plates, sliding blocks are arranged in the limiting grooves, and the limiting direction of the limiting grooves and the extending direction of the corrugated plates are the same; and in an original state, intervals are formed in two sides of the sliding blocks, which is used for connecting with a beam body, and the limiting grooves. According to theone-way energy consumption collapse-proof device, an energy consumption member and a collapse-proof device are combined effectively, so the collapse-proof device has the prominent capacity of reducingshock and energy consumption; and at the stage of normal operation, double-way movement of the beam body is satisfied, the participation of the energy consumption member is reduced, and energy consumption is efficient and proof collapsing is avoided when the earthquake is coming.

The invention discloses a bridge position-limiting energy-consuming shock-absorbing and isolating bearing and a manufacturing method thereof, belonging to the technical field of bridge bearings. The support includes an upper support plate, a support base basin and a shock isolation module, the upper support plate is located on the support base basin, and the surrounding areas of the upper support plate are composed of external steel plates, high damping rubber blocks, and inner connecting steel plates. shock isolation module. The high damping rubber block is located between the vertical plate in the external steel plate and the inner connecting steel plate. A limit stop is arranged around the bottom plate of the support base to limit the horizontal direction of the external steel plate, and the limit stop is close to the vertical plate. On the inner side, when the limit bolts are sheared due to the external force, the steel plate is added to limit the relative displacement of the pier beam, and the high damping rubber block dissipates energy through shearing and tension-compression deformation to play a shock-absorbing function and a certain self-resetting ability. The biggest advantage of the invention is that the limiting function of the pier beam is integrated into the traditional spherical bearing or basin bearing, which reduces the difficulty of design and construction and the economic cost of post-earthquake repair.

The invention relates to the field of bridge engineering, and particularly discloses a vibration reduction locking type box girder falling prevention device. The device comprises a first steel columnand a second steel column which are embedded in a first box girder and a second box girder in a penetrating mode, and the two ends of the first steel column and the two ends of the second steel columnare fixedly connected through connecting plates. Incomplete spherical through grooves are formed in the opposite ends of the first box girder and the second box girder in the width direction in a penetrating mode, a connecting insertion column is inserted into the two spherical through grooves, containing cavities are reserved between the two ends of the connecting insertion column and the two spherical through grooves, vibration reduction columns are inserted into the containing cavities, the vibration reduction columns are hollow, the vibration reduction columns are filled with a pluralityof vibration reduction balls, and first springs are arranged in the vibration reduction balls. The invention aims to solve the technical problem of girder falling caused by displacement of the box girders.

A bridge multi-directional anti-seismic force-measuring limiting device comprises an upper limiting unit and a lower limiting unit which are mounted oppositely. The lower limiting unit is arranged transversely. An opening of a U-shaped frame faces downwards. The end surfaces of two fork arms of the frame are connected with a pier table of a bridge through pre-embedded plates and shear bars. The upper limiting unit is arranged longitudinally. An opening of a U-shaped frame faces upwards. The end surfaces of the two fork arms of the frame are connected with a beam body of the bridge through pre-embedded plates and shear bars. The contact surface of transverse arms of the U-shaped frames of the upper limiting unit and the lower limiting unit is provided with a friction pair. The inner sides of the fork arms are provided with opposite pressure sensors. The pressure sensors are connected with the fork arms of the frame through adjusting assemblies and connected with an exterior detecting instrument through cable signal wires. The outer sides of the pressure sensors are connected with buffering energy-consuming parts correspondingly. The limiting device can prevent beam from falling andcollision damage under action of an expected earthquake, a supporting seat between pier beams is protected from ultralimit displacement damage, long-time real-time online safety detection can be conducted, scientific data are provided for analysis, evaluation and maintenance of the bridge, and the safety of the bridge is ensured.

The invention relates to a bridge anti-seismic chock block invention field, and specifically relates to a bridge prefabricated may reset energy dissipation anti-seismic check blocks. The device comprises a back plate, a front plate, a U-shaped plate, a connecting rod, a spring, a soft steel, a bolt, a gasket, a stiffening rib, a bolt hole, a track; the front plate back plate consists of a plurality of sleeved with a spring, the connecting rod and the front plate are welded, the other end of the connecting rod passes through the corresponding hole on the back plate through a bolt after the backing plate at the limit connecting rod is pulled out of the back plate, the left side and the right side plate of the U-shaped plate is provided with a plurality of bolt holes, the baffle block throughthe bolt connected to the cover beam, and this connection can be fabricated connection mobility. According to the device, compared with the traditional stop block, the structure is simple, the stressis clear, the conventional check block and a main beam of the rigid collision into flexible collision, slowing down the seismic action on the main beam and the baffle block, reducing the impact of the stop block and the local damage of the main beam.

The invention discloses a fabricated bridge double-column pier system capable of being recovering functions after an earthquake and a construction method. The fabricated bridge double-column pier system comprises a pile column, a first pier column, a second pier column, a first bent cap, a second bent cap, a double-layer combined stop block, a lead core rubber support, a shock absorption and energy dissipation cable, a self-resetting buckling-restrained brace and a pile pier joint area. The first pier column and the first bent cap as well as the second pier column and the second bent cap are internally connected by adopting prestressed tendons and externally connected by adopting a welding mode; transition between the first pier column and the pile column and transition between the secondpier column and the pile column are achieved through the pile pier joint area, and self-resetting buckling-restrained braces are adopted for reinforcement. Shock absorption and energy dissipation cables are arranged between the first pier column and the second pier column in a crossed mode, the first bent cap and the second bent cap are connected through a lead core rubber support, and double-layer combined check blocks are arranged on the top faces of the beam ends of the first bent cap and the second bent cap. The invention relates to the bridge double-pier quakeproof system, belongs to thefield of bridge engineering, is convenient to construct and has a post-earthquake recoverable function.

The invention relates to a double-cantilever steel damping device. The device comprises a bottom plate, a base sliding plate, a guide base, a symmetrical double-cantilever steel damping mechanism anda thrust steel box, the base sliding plate is fixedly installed on the bottom plate, and the guide base capable of sliding in the longitudinal direction of the base sliding plate is further arranged on the base sliding plate. The thrust steel box is arranged on the guide base in a sliding mode in the transverse direction, the middle of the symmetrical double-cantilever steel damping mechanism is connected with the guide base, and the two ends of the symmetrical double-cantilever steel damping mechanism are movably connected with the two sides of the thrust steel box respectively. The verticalanti-drawing function can be selectively provided, and the requirement of a bridge in a high-intensity area for vertical limiting of the seismic mitigation and absorption device is met.

The invention discloses a shock-absorbent power-wasting three-way limiting metal damping device for a near-fault bridge and a mounting method thereof. The device comprises an elastic-plastic limitingshock-absorbent power-wasting rod and an adjustable connecting plate, wherein the adjustable connecting plate is provided with an inner hole; each cross section of the elastic-plastic limiting shock-absorbent power-wasting rod can simultaneously enter a yield state to realize maximum ductile deformation; the bottom of the elastic-plastic limiting shock-absorbent power-wasting rod is connected withthe top of a bridge pier, a bridge tower crossbeam or an arch rib crossbeam; the top of the elastic-plastic limiting shock-absorbent power-wasting rod extends into the inner hole, the periphery of the top is abutted against the wall of the inner hole along two opposite sides of a bridge direction, and the separation distance n (n is more than or equal to 0) is reserved between two opposite sidesof a top transverse bridge direction and the wall of the inner hole; the adjustable connecting plate is connected with an upper connecting piece; a lifting lug is arranged at the top of the elastic-plastic limiting shock-absorbent power-wasting rod; the bottom of the upper connecting piece corresponding to the inner hole is provided with an anti-pulling pull ring; a gap is arranged between the topend of the lifting lug and the bottom end of the anti-pulling pull ring; and the anti-pulling pull ring and the lifting lug are connected through an anti-pulling pull cable.

The invention provides a U-shaped damping beam falling preventing device. The device comprises an upper connecting plate and a lower connecting plate which are arranged in parallel. One end of the upper connecting plate is connected with one end of the lower connecting plate through a U-shaped plate. The upper connecting plate is connected with a first buried plate pre-buried in the bottom of a beam body through a plurality of first bolts, and the lower connecting plate is connected with a second buried plate pre-buried in the top of a pier through a plurality of second bolts. According to the U-shaped damping beam falling preventing device, beam falling can be effectively prevented, and the U-shaped damping beam falling preventing device has the beneficial effects of being convenient to install and fast to replace.