159results about How to "Good self-resetting performance" patented technology

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 relates to a horizontal seamed energy dissipation prestressed shear wall structure, belonging to the technical fields of shock resistance and shock absorption in structure engineering. The shear wall structure comprises a reinforced concrete wall, an energy dissipation device, connecting steel plates, horizontal seams, prestressed reforcing steel, high-strength bolts, anchoring accessories and a foundation. The horizontal seams are arranged in the shear wall structure, and a connecting member or device is used for enhancing the energy dissipation capacity; and simultaneously, vertical high-strength prestressed reforcing steel are arranged in the shear wall to strengthen the connection performance of the structure and improve the rigidity of the structure. Thus, the horizontal seamed energy dissipation prestressed shear wall structure is suitable for industrial and civil buildings in the region where the seismic fortification intensity is higher than 6. The invention has the advantages of simple sturcture, low cost of required materials, good hysteretic energy dissipation capacity, good self-resetting characteristic, small residual structural deformation and no damage.

The invention discloses a self-resetting beam column friction energy dissipation joint structure and a construction method thereof. The self-resetting beam column friction energy dissipation joint structure comprises a steel column, a middle beam, short beams, connecting plates, a brass friction plate, spring baffles, high-strength anchor rods and disc springs. One ends of the short beams are fixedly connected with the flanges of the side wall of the steel column, and a gap exists between the middle beam and the short beams; one ends of the connecting plates are fixedly connected with the webof the middle beam, and the other ends are hinged to the webs of the short beams; the brass friction plate is arranged between the connecting plates and the webs of the short beams; one ends of the high-strength anchor rods penetrate through the spring baffles, and the other ends of the high-strength anchor rods penetrate through the two flanges of the steel column and are fixed. The spring discsare sleeved on the high-strength anchor rod on one side, far away from the steel column, of the spring baffles. Structural construction is completed through basic construction, small earthquake testing, parameter selection, node performance design and large earthquake inspection. According to the invention, the formation of a plastic hinge of a traditional steel frame beam-column joint is effectively avoided, the beam column joint is not damaged or slightly damaged under the action of a large earthquake, and the post-earthquake joint can be put into use without repair.

The invention relates to self-reset shear walls with replaceable coupling beams and belongs to the field of aseismic structure systems. The self-reset shear walls are composed of replaceable coupling beams and self-reset shear wall bodies connected with the replaceable coupling beams. The replaceable coupling beams are composed of replaceable sections and non-yielding sections, and the self-reset shear wall bodies are post-tensioned un-bonded pre-cast shear walls. According to the self-reset shear walls, the concept is clear, construction is convenient, the safety of main body structures can be effectively protected during middle earthquakes or major earthquake, repair and replacing of damaged members after earthquakes are facilitated, and the self-reset shear walls are applicable to important building structures in high-intensity earthquake regions.

The invention discloses a high-ductility prestressed fabricated concrete beam-column connecting joint and a construction method thereof. The high-ductility prestressed fabricated concrete beam-columnconnecting joint comprises a prefabricated beam, a prefabricated column, first and second post-tensioned prestressed tendons for connecting the prefabricated column with the prefabricated beam, and energy dissipation angle steel. A penetrating unbonded prestressed tendon reserved hole way is formed in the section centroid of the beam for allowing the first prestressed tendon to penetrate into; anunbonded prestressed tendon reserved hole way is formed in the position, at the top of the beam, of the end of the beam for allowing the second prestressed tendon to penetrate into; a groove is formedin the position, at the top of the beam, of the anchorage section of the beam so as to anchor the second prestressed tendon; hole ways also need to be reserved in the positions, corresponding to thebeam, of the column; and the energy dissipation angle steel is arranged on the position, connected with the column, of the lower portion of the beam and fixed through pre-embedded high-strength connection bolts. The high-ductility prestressed fabricated concrete beam-column connecting joint is easy and convenient to construct, cast-in-situ concrete is not needed, the self-resetting capability is achieved, the ductility is high, the energy dissipation capacity is good, and good continuous-collapse resistance is achieved.

The invention relates to a segmental assembled concrete frame pier system with a self-reset function and a construction method. One end of each longitudinal reinforcing steel bar penetrates through a concrete pier and a reinforcing steel bar corrugated pipe in a prefabricated concrete cover beam to be fixedly connected with the prefabricated concrete cover beam. High-strength mortar is poured into the reinforcing steel bar corrugated pipes. The other end of each longitudinal reinforcing steel bar penetrates through the corresponding concrete pier to be fixedly connected with a pier head reinforcing steel bar on a platform on the bottom face of a cup opening of a concrete bearing platform. A prestress stranded steel wire penetrates through the concrete bearing platforms, the two concrete piers and the prestress reinforcing steel bar corrugated pipes of the prefabricated concrete cover beams. The two ends of the stranded steel wire are fixedly connected with the prefabricated concrete cover beams respectively. Concrete is arranged in cup openings of the concrete bearing platforms in a post-pouring mode. It can be ensured that the reinforcing steel bars have enough holding and wrapping length under the action of earthquake loads so that force can be effectively transferred. Due to the structure, the segmental assembled concrete frame pier system can be suitable for various types of foundations, the earthquake performance of the system can be better than that of a traditional cast-in-place reinforced concrete pier, and the aim of rapid construction is achieved.

The invention discloses a self-resetting swing steel frame structure. The self-resetting swing steel frame structure comprises basic parts, steel columns, a column foot joint structure, a beam end joint structure and a middle beam, wherein the number of the basic parts and the number of the steel columns are respectively two; the steel columns are vertically arranged at the tops of the basic parts; the column foot joint structure comprises column foot high-strength anchor rods, a column foot disc-shaped spring and cantilever plates; the cantilever plates are fixed to the two sides, close to the bottoms, of the steel columns; the column foot high-strength anchor rods penetrate through the cantilever plates and are fixedly connected with the tops of the basic parts; the column foot disc-shaped spring is sleeved on the column foot high-strength anchor rod on one side, far away from the basic parts, of the cantilever plates; and the middle beams is transversely arranged and is fixed between the two steel columns. The steel frame has extremely high self-resetting performance and energy consumption capacity, and also has excellent ductility and fatigue resistance.

The invention discloses a semi-active negative rigidity multidimensional vibration damping device. The semi-active negative rigidity multidimensional vibration damping device comprises an outer box body, wherein a tuned liquid damper, a negative rigidity mechanism and a magnetostrictive vibration generating unit are arranged inside the outer box body. The tuned liquid damper is a cylinder filled with damping liquid, the side surface of the cylinder is connected with a vibration absorption layer through a plurality of springs with one ends connected with rolling balls, the cylinder is arrangedon a plurality of metal balls, and the metal balls are arranged above a drum body. The negative rigidity mechanism is formed by the drum body and negative rigidity adjusting units radially arranged around the drum body; a giant magnetostrictive body is arranged at the bottom in the outer box body and connected with the drum body through a disc spring, and an induction coil and a permanent magnet are arranged around the giant magnetostrictive body from inside to outside to form the magnetostrictive vibration generating unit. An acceleration sensor is arranged at the bottom of the drum body andis connected with the magnetostrictive vibration generating unit, an electric energy storage and extraction unit, a controller and an excitation coil in series to form a closed loop.

Disclosed is a piston type SMA-piezoelectric composite variable friction damper. The damper mainly comprises an outer cylinder barrel, an upper cylinder cover, an outer end piston, a curve friction steel plate, a connection rod, a sliding shaft, an SMA wire rope, an auxiliary spring A, a prepressing bolt, an adjusting nut, a piezoelectric ceramic driver, a force sensor, a flat screw, a connection bolt, a flat end fastening screw, an SMA wire rope fixing bolt, a lower cylinder cover, an inserting bolt, an annular fixing button, a middle piston, an open hole, a spring support A, a round groove, a friction material, a cylindrical guide rod, a guide rod siding bin, threads, an adjusting bolt, a clamp protrusion, a stop block, a sliding groove, a sliding bin cover, a wire, a power inlet port, a spring support B, a spring support C, a spring support D and an auxiliary spring B. The damper is simple in structure and easy to achieve and has the effects of deformation adjusting through voltage, fast and reliable motion responses, large driving force and good self reset. The magnitude of precompression can be adjusted precisely. Energy dissipation and earthquake attenuation requirements under earthquakes of different intensities can be met.

The invention relates to a tension compression type self-reset and anti-buckling energy dissipation bracing. The tension compression type self-reset and anti-buckling energy dissipation bracing comprises a hinged supporting seat, a connecting plate, a memory alloy bar, an anti-buckling steel sleeve and a steel plate rubber supporting seat. The memory alloy bar is arranged in the anti-buckling steel sleeve, one end of the memory alloy bar is connected with the connecting plate, the other end of the memory alloy bar is a movable end, and the movable end is subjected to the tensile limit of the anti-buckling steel sleeve. The end of the anti-buckling steel sleeve is connected with the connecting plate by the steel plate rubber supporting seat, and subjected to the extrusion limit of the connecting plate. The hinged supporting seat is hinged to the connecting plate. The tension compression type self-reset and anti-buckling energy dissipation bracing combines the self-reset characteristic of the large diameter shape memory alloy bar under large deformation at the time of pulling, the self-reset characteristic of the steel plate rubber supporting seat under large deformation when pressed, and the anti-buckling performance of a restrained steel tube unit located at the outer portion of the anti-buckling bracing to form the novel anti-buckling bracing which has good self-reset performance and energy dissipation characteristic when pulled and pressed.

The invention discloses an in-series disc spring large deformation energy consumption beam column node, which comprises an assembly type column, an assembly type beam and a disc spring combination type damper, wherein the disc spring combination type damper consists of an energy consumption rod, a disc spring set, an internal thread sleeve, an outer sleeve, a sliding guide rod and an extrusion nut, one end of the disc spring combination type damper is fixed on the fixed plate of a surface of the assembly type beam, and the other end passes through the flange plate of the assembly type column and presses tightly the flange plate. By adjusting the pressure of the extrusion nut, tensile deformation generated by the two ends of the disc spring combination type damper can be fully supplied by the energy consumption rod under the action of small and moderate earthquakes, the other part is supplied by the compressive deformation of the disc spring set, so that the disc spring combination typedamper has better deformability, and the fatigue performance of the disc spring combination type damper is conducive to being improved.

The invention relates to a multistage variable-frequency variable-friction pendulum vibration isolation support. The multistage variable-frequency variable-friction pendulum vibration isolation support comprises an upper connecting seat plate, wherein a lower connecting seat plate arranged below the upper connecting seat plate, an upper sliding block and a lower sliding block; the upper slide block is in spherical contact with the lower slide block, the lower surface of the upper connecting seat plate is provided with an upper friction layer, the upper surface of the lower connecting seat plate is provided with a lower friction layer, the upper surface of the upper slide block is in spherical contact with the lower surface of the upper connecting seat plate, and the lower surface of the lower slide block is in spherical contact with the upper surface of the lower connecting seat plate. The lower surface of the upper connecting seat plate is a spherical concave surface, the upper surface of the upper sliding block is a spherical convex surface, and the spherical concave surface of the upper connecting seat plate is adapted to the spherical convex surface of the upper sliding block;and the upper surface of the lower connecting seat plate is a spherical concave surface, the lower surface of the lower sliding block is a spherical convex surface, and the spherical concave surface of the lower connecting seat plate is adapted to the spherical convex surface of the lower sliding block. The multistage variable-frequency variable-friction pendulum vibration isolation support has self-adaptability of rigidity and damping and stronger re-centring ability. The multistage variable-frequency variable-friction pendulum vibration isolation support belongs to the technical field of vibration isolation.

The invention provides a high-low-strength multi-layer steel plate combined self-centering energy dissipating wall which comprises a wall body formed by combining a plurality of layers of high-strength steel plates and low-strength steel plates. The low-strength steel plates are arranged between the high-strength steel plates, and the low-strength steel plates and the high-strength steel plates are fixedly connected through bolts. According to the high-low-strength multi-layer steel plate combined self-centering energy dissipating wall, good lateral stiffness and energy-dissipating capacity can be provided for the structure, and the combined function of low-yield-point steel and high-strength steel can be fully utilized, so that the energy dissipating wall has good post-yield stiffness and self-centering capacity, and structural residual deformation generated by earthquakes is reduced. A damper can be fast and conveniently reset or replaced after the earthquakes. By means of the energy dissipating wall, great significance is achieved on reducing and controlling building earthquake damage and achieving non-break or fast restoration of the function of a building.

The invention relates to a bolt-connected prefabricated segment shear-resistant assembly concrete pier which comprises a plurality of prefabricated rectangular concrete segments, a cast-in-place bearing platform, a prestressed steel strand and an anchorage device, wherein segment splicing position connecting devices are respectively arranged at the upper rend and the lower end of each of the segments, each of the segment splicing position connecting devices comprises a pressure-bearing steel plate and a vertical opening steel plate, eight small holes are reserved in the circumference of the pressure-bearing steel plate, and the adjacent segments are connected with each other through bolts; the upper part of the cast-in-place bearing platform extends out of the one small segment encrypted by a stirrup, the segment splicing position connecting device is arranged at the upper part extending out of the one small segment and can be connected with the lowermost surface of the prefabricated rectangular concrete segment; the prestressed steel strand penetrates through the prefabricated rectangular concrete segments and the cast-in-place bearing platform from top to bottom; the anchorage device is arranged at the bottom of the cast-in-place bearing platform and anchors the prestressed steel strand extending out of the cast-in-place bearing platform. The bolt-connected prefabricated segment shear-resistant assembly concrete pier provided by the invention has the benefits that the self-reset performance is improved by the prestressed steel strand; and meanwhile, the shear resistance of the prefabricated segment assembly bridge pier is improved by the connecting bolts, and the factory production is facilitated; the site construction procedure is reduced, so that the construction efficiency is greatly improved.

The invention discloses a self-reset precast assembled bridge pier with internally-installed prestress FRP rebars and a construction method for the self-reset precast assembled bridge pier. The bridge pier comprises a main structure body composed of a bearing platform, swing segments, a transition segment and a general segment, [-shaped grooves are formed in the end portion of the bearing platform, and the end portion of the bearing platform is nested in a single wall steel sleeve; [-shaped grooves are formed in the two ends of each swing segment and the lower end of the transition segment, and the two ends of each swing segment and the lower end of the transition segment are nested in dual-wall steel sleeves; and no [-shaped groove and dual-wall steel sleeve is arranged at the upper end of the transition segment and the two ends of the general segment, a viscous damper is installed in each [-shaped groove, and the prestress FRP rebars are tensioned between the bearing platform and the transition segment. According to the self-reset precast assembled bridge pier with the internally-installed prestress FRP rebars and the construction method for the self-reset precast assembled bridge pier, not only can the self-reset capacity of the precast assembled bridge pier (single column pier) be improved precisely, but also the use performance of a damaged bridge pier can be restored quickly.

An external wrapping steel plate connection type segmental prefabricated assembly concrete pier comprises a plurality of prefabricated rectangular concrete segments, a cast-in-situ pile cap, a pre-stressed steel strand and a high-strength bolt. A segment joint external wrapping steel plate is arranged around the upper end of each prefabricated rectangular concrete segment, and adjacent prefabricated rectangular concrete segment are in vertical inserted connection. A horizontal pre-embedded positioning steel plate is arranged in the cast-in-situ pile cap, a rectangular space is reserved in thecenter of the pre-embedded positioning steel plate, and the lower edge of each pre-embedded external wrapping steel plate is welded to the center edge of the pre-embedded positioning steel plate whilethe upper portion extends out of the cast-in-situ pile cap to form a space allowing insertion of the bottommost prefabricated rectangular concrete segment. The pre-stressed steel strand penetrates the prefabricated rectangular concrete segments and the cast-in-situ pile cap from top to bottom. The high-strength bolt is arranged at the bottom of the cast-in-situ pile cap to anchor the pre-stressedsteel strand extending out of the cast-in-situ pile cap. By prestress of the pre-stressed steel strand, the self-reset performance is improved; by the external wrapping steel plates, shear resistanceof the segmental prefabricated assembly concrete pier is improved, easiness in industrial manufacturing is achieved, onsite construction procedures are reduced, and construction efficiency is greatlyimproved.

The invention provides a fabricated self-resetting beam column joint and a construction method thereof. The joint is connected with a beam column component through wedge-shaped connecting pieces, beamflanges are provided with corresponding slopes matched with the wedge-shaped connecting pieces, and the beam flanges and the wedge-shaped connecting pieces are combined to form friction pairs. SMA bolts are adopted for connecting and pressing the steel beam flanges and the wedge-shaped connecting pieces, and it is guaranteed that the friction pairs are always kept tightly attached in the slidingprocess. Kidney-shaped bolt holes are formed in the beam flanges to achieve relative sliding between the beam flanges and the wedge-shaped connecting pieces, SMA bolt deformation is increased in the sliding process, so that the self-resetting capacity is excited, meanwhile, friction force between the friction pairs is increased, and the energy dissipation capacity of the joint is improved. On theother hand, SMA cables are adopted to connect additional extending flanges of the wedge-shaped connecting pieces with additional connecting plates on a steel beam, so that multi-assembly energy dissipation and self-resetting capacity of the joint under larger deformation are achieved. Therefore, the joint well realizes the balance between the self-resetting performance and the energy dissipation capacity, and solves the problem that the energy dissipation characteristic and the self-resetting characteristic of existing joints are difficult to combine at the same time.

The invention relates to a variable friction pendulum shock insulation support and belongs to the technical field of shock insulation. The variable friction pendulum shock insulation support comprisesan upper connecting block, a lower connecting block located below the upper connecting block and a sliding block. A lower friction layer is arranged on the upper surface of the lower connecting block, the upper surface of the sliding block makes spherical contact with the lower surface of the upper connecting block, and the lower surface of the sliding block makes spherical contact with the uppersurface of the lower connecting block. The lower surface of the upper connecting block is a spherical concave face, the upper surface of the sliding block is a first spherical convex face, and the spherical concave face of the upper connecting block is adaptable to the first spherical convex face of the sliding block. The upper surface of the lower connecting block is a spherical concave face, the lower surface of the sliding block is a second spherical convex face, and the spherical concave face of the lower connecting block is adaptable to the second spherical convex face of the sliding block. The variable friction pendulum shock insulation support has damping self-adaption and high self-resetting capacity.

The invention discloses a prestressed reinforced concrete precast column vertical connecting structure and a construction method thereof. The prestressed reinforced concrete precast column vertical connecting structure comprises an upper-layer reinforced concrete prefabricated column, a lower-layer reinforced concrete prefabricated column, a steel bar connector, a leveling positioner and a sealinggrouting material, an anchoring space for accommodating the steel bar connector is formed in the bottom end of the upper-layer reinforced concrete prefabricated column; lower-layer column prestressedribs and upper-layer column prestressed ribs do not make contact in the steel bar connector, the leveling positioner is arranged on the top end face of the lower-layer reinforced concrete prefabricated column, the bottom end face of the upper-layer reinforced concrete prefabricated column abuts against the positioner, an initial tensioning gap is formed between the upper-layer reinforced concreteprefabricated column and the upper-layer reinforced concrete prefabricated column, and the initial tensioning gap is filled with the sealing grouting material. The pre-stress principle of pre-stresssteel bars is utilized, and standing and positioning of the columns are achieved through initial tensioning of the pre-stress steel bars in cooperation with the leveling positioner; and then through complete tensioning, reliable connection of the columns and the overall lateral performance and self-resetting performance of the structure are ensured.

The invention discloses a self-resetting reinforced concrete shear wall based on viscoelastic energy consumption. The shear wall comprises a reinforced concrete shear wall body and self-resetting energy dissipation devices, and the self-resetting energy dissipation devices are symmetrically arranged on the two sides of a wall foot of the reinforced concrete shear wall body. The self-resetting energy consumption device comprises an inner pipe and an outer pipe which are coaxially arranged, the inner pipe can axially reciprocate in the outer pipe, the lower part of the outer pipe is expanded, an upper baffle plate and a lower baffle plate which are respectively sleeved on the inner pipe are arranged in the expanded area, and a pre-pressing disc spring is arranged between the upper baffle plate and the lower baffle plate. An inner welding plate is arranged on the surface of the outer wall of the inner pipe above the expanded area, and a viscous-elastic material is arranged between the inner welding plate and the outer pipe. The upper end of the inner pipe is connected with the upper end plate. The self-resetting energy dissipation device is simple in structure, low in manufacturing cost and convenient to install and machine, the self-resetting energy dissipation device can give full play to the characteristics of the disc spring and the viscoelastic material, the self-resetting energy dissipation device has good self-resetting capacity and energy dissipation capacity, residual deformation of a wall body after an earthquake can be effectively reduced, and the anti-seismic property of the reinforced concrete shear wall is improved.

The invention discloses a self-resetting rocking wall based on buckling-constrained shape memory alloy bars. A rocking wall body and a foundation beam are connected by wall connecting systems, and thewall connecting systems ensure that the wall body and the foundation beam are directly hinged and leave sufficient rotating space for the rocking wall body. The alloy bars are arranged between the rocking wall body and the foundation beam, the bottoms of the alloy bars are connected to the foundation beam through anchoring devices, and the tops of the alloy bars are connected to the rocking wallbody through pre-embedded sleeves. Constraining sleeves are mounted on the circumferential sides of the shape memory alloy bars and wrap the shape memory alloy bars. Main body frames or walls are disposed on both sides of the rocking wall body, and the main body frames or the walls are connected with the rocking wall body through a plurality of sets of inter-wall dampers. The inter-wall dampers can improve the energy dissipation capability of the rocking wall. When the inter-wall dampers do not have the self-resetting performance, the shape memory alloy bars apply pre-tightening force in an over-thread-screwing mode to overcome the return resistance of the dampers.