41results about How to "Reduce residual displacement" patented technology

The invention discloses a novel earthquake damage control system for a thin-wall hollow pier. The novel earthquake damage control system comprises a pier base, a thin-wall hollow pier, high-tenacity fiber-enhanced cement-based composite material expanded sections, an unbonded prestressed tendon and steel energy consumption elements, wherein the thin-wall hollow pier is arranged on the upper end surface of the pier base, so that the torsional strength and the energy-dissipating capacity of the thin-wall pier are improved. The high-tenacity fiber-enhanced cement-based composite material expanded sections are arranged on the inner side and the outer side of the lower part of thin-wall hollow pier; a series of steel energy consumption elements are arranged in the thin-wall hollow pier along the pier height; the lower part of the unbonded prestressed tendon is anchored on the pier base; and the upper part of the unbonded prestressed tendon is anchored at the center of the first steel energy consumption element from bottom to top. By virtue of the unbonded prestressed tendon, the self-resetting capacity of the pier after the earthquake is provided; and the crack width of the pier after the earthquake is reduced. By virtue of the high-tenacity fiber-enhanced cement-based composite material expanded sections, the axis-compression ratio of the bottom section of the thin-wall hollow pier is reduced; the shear-bearing capacity and the anti-bending capacity of the thin-wall hollow pier are increased; and the steel energy consumption elements can be arranged as rapid exchange components, so that the repairability after the earthquake is increased.

The invention discloses a three-way limiting buffering bridge anti-seismic stop dog structure and an arranging and installing method. The bridge anti-seismic stop dog structure comprises a steel corbel, a stop dog lower structure and a stop dog upper structure; the steel corbel is fixed to the side face, in the bridge axial direction, of the top of a pier close to a bridge movable supporting base, the stop dog lower structure is fixed to the top of the steel corbel through bolts, a groove is formed in the lower portion of the stop dog upper structure, the stop dog upper structure is fixed to the bottom of a main beam of the bridge through bolts, and an impact block is arranged on the upper portion of the stop dog lower structure. Relative large displacement between a beam body and the pier in the bridge axial direction, bridge transverse direction and vertical direction can be effectively limited, damage to the movable supporting base and expansion joints is reduced, and the beam body is prevented from falling in the bridge axial direction and bridge transverse direction and prevented from vertically getting away from the supporting base to cause damage on the supporting base, beam cocking damage and vertical impact damage between the beam body and the supporting base. The three-way limiting buffering bridge anti-seismic stop dog structure is simple in structure, convenient to construct, easy to repair and replace and suitable for new and old bridges.

The invention relates to a friction self-locking type prefabricated section spliced pier connecting device. Prestressed tendons in a traditional section spliced pier connecting device are omitted. A concrete-filled steel tube mode is adopted for locally reinforcing a connecting area. An outer casing tube with a larger diameter and an inner casing tube with a smaller diameter are adopted as concrete-filled steel tubes at the two ends for connection respectively. The inner steel tube and the outer steel tube are connected in a sleeved mode in the section splicing process, self-locking pins are struck into the part between the inner steel tube and the outer steel tube, friction self-locking is made to be formed between the inner casing tube and the outer casing tube, and the tight connection between sections is ensured. Due to the fact that the thickness of the outer casing tube and the gradient of the self-locking pins are reasonably designed, the connecting structure can maintain flexibility during frequent earthquakes and have sliding friction during rare occurrence earthquakes, and thus earthquake energy is dissipated.

The invention discloses an energy dissipation self-reset anti-seismic retaining block structure for a bridge. The structure comprises a cap beam and a beam body, seismic mitigation and absorption supports are arranged on the top surface of the cap beam, the beam body is supported on the seismic mitigation and absorption supports, and retaining blocks are arranged at two ends of the cap beam respectively. A flat end of a concave steel plate with a projection portion having a through hole in the width direction is fixedly embedded into each retaining block, a hinge dowel penetrates holes of each concave steel plate and a corresponding turnover steel plate to connect the two to form a movable hinge, a projection portion of each turnover steel plate is provided with the through hole, and a flat end of each turnover steel plate is provided with a slope. A steel plate with a suspension arm end identical to the corresponding turnover steel plate in slope angle is welded to a beam body embedded part, a plurality of springs are arranged at the end of each turnover steel plate, and each turnover steel plate and the cap beam are connected together through the springs. Under seismic action, seismic energy dissipation and self reset of the beam body can be realized by the movable hinges and the springs, beam falling accidents are reduced, and seismic performance of a bridge structure is improved.

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 belongs to the technical field of civil engineering, and particularly relates to a tension-pressure equal-strength type metal energy consumption re-centering damper and an installation and using method thereof. The tension-pressure equal-strength type metal energy consumption re-centering damper comprises a cylinder body, a guide rod, a first metal corrugated pipe, a belleville spring set, a pressure sensor and a second metal corrugated pipe, wherein the first metal corrugated pipe, the belleville spring set, the pressure sensor and the second metal corrugated pipe are connectedto the guide rod, the guide rod is connected with the cylinder body through a first connecting plate, a first limiting plate, a first connecting bolt and a third connecting bolt, a first lug plate anda second lug plate are arranged on the cylinder body and the guide rod respectively, and the first lug plate and the second lug plate are connected to the stress positions of a building structure. The tension-pressure equal-strength type metal energy consumption re-centering damper can be applied to the fields of shock absorption control of building and bridge structures, rapid recovery of the using function of the structure after an earthquake and the like, the metal corrugated pipes are used for energy consumption, the energy consumption capacity of the metal corrugated pipes is stable, theenergy consumption mechanism is clear, the out-of-plane instability problem does not exist during stress, and the tension-pressure equal-strength type metal energy consumption re-centering damper hasgood application prospects in the field of the civil engineering.

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 discloses a self-resetting composite energy dissipation support utilizing gears to amplify displacement and pulleys to open inhaul cables. The self-resetting composite energy dissipationsupport is jointly composed of the gears, a sawtooth-shaped metal strip, the pulleys, the high-strength steel wire inhaul cables, viscoelastic dampers, buckling restrained braces and metal rubber energy dissipation devices; and under the action of a small earthquake, the small gears do not make contact with the sawtooth-shaped metal strip, the viscoelastic dampers play a role in energy consumption, under the action of a medium earthquake or a large earthquake, the small gears are meshed with the sawtooth-shaped metal strip to drive the gears and the pulleys to rotate, so that the high-strength steel wire inhaul cables are tensioned and applies tensile force to the high-strength steel wire inhaul cables, the high-strength steel wire inhaul cables play the same role as a prestressed tendon,therefore the purpose of self-resetting is achieved, the gears with different diameters are combined, displacement can be amplified, the high-strength steel wire inhaul cables bear larger tension, and the high-strength steel wire inhaul cables have high self-resetting capacity. The self-resetting composite energy dissipation support can achieve energy dissipation and seismic mitigation under earthquakes with different strengths and can achieve self-resetting under the conditions of medium and large earthquakes, and the safety of a main body structure is protected.

The invention relates to a self-resetting whole assembly type friction energy dissipation steel frame beam-column joint. The self-resetting whole assembly type friction energy dissipation steel framebeam-column joint comprises a swing column, a frame beam, a beam-column connection vertical plate, a beam-column connection bottom plate and a base plate stiffener plate. The sections of the swing column and the frame beam are in H shapes, and each comprise a web plate on the middle and flanges on the two sides, the swing column is in a breaking type, the two segments are located above and below the frame beam correspondingly, the beam column connecting bottom plate is arranged between the swing column and the flanges of the frame beam, the beam column connecting bottom plate and the flanges of the frame beam are provided with connecting holes allowing the beam-column connection vertical plate to penetrate through, the beam-column connection vertical plate vertically penetrates through theconnecting holes, the middle is tightly attached to the web plate of the frame beam and is fixedly connected through a common bolt, and the upper portion and the lower portion are in sliding connection with the web plate of the swing column through friction type bolts. According to the technical scheme, the plastic rotation capacity of the joint can be effectively improved, beam columns generateproper swing under the large and medium earthquake, the beam columns generate proper friction to consume earthquake energy, large plastic damage of the main structure due to the large earthquake can be prevented, and the repair after the earthquake can be facilitated.

A prefabricated assembly type swing pier structure system with an additional energy dissipation support or a self-resetting energy dissipation support belongs to the technical field of seismic mitigation and isolation of bridge engineering, and mainly comprises a prefabricated bearing platform, a prefabricated pier column, a prefabricated cover beam, a prefabricated support and a resetting rib, two bearing platform sleeves are arranged on the prefabricated bearing platform and are used for connecting the two lower lug plates; column sleeves are arranged at the upper part and the lower part of the prefabricated pier column; a cover beam sleeve is arranged in the middle of the prefabricated cover beam and used for being connected with an upper lug plate. The prefabricated support is arranged between the lower lug plates and the upper lug plate and is hinged through a pin; the reset rib penetrates through holes reserved in the prefabricated bearing platform, the prefabricated pier column and the prefabricated cover beam, and are fixedly connected to the lower end of a platform body of the prefabricated bearing platform and the upper end of a beam body of the prefabricated cover beam through a high-strength bolt and a groove-shaped steel gasket. In the earthquake process, the whole system swings, the bending moment of the top and the bottom of the pier column is released, and plastic hinges at joints are avoided.

The invention discloses a multistage energy dissipation device for triggering and controlling self-resetting by adjusting the cable force and threshold with a pulley. The multistage energy dissipationdevice comprises a high-strength metal plate, a special-shaped translation rod, a rotating rod, a metal chain rod, a metal rod, a positioning bracket, the pulley, a high-strength steel wire inhaul cable, a viscoelastic damper, an energy dissipation support, a hinged support seat and the like. When the earthquake action is small, earthquake energy is dissipated through shear deformation of viscoelastic materials in the viscoelastic damper. When the earthquake action is large (medium and large earthquakes), the energy dissipation and shock absorption effects are achieved by the viscoelastic damper first. When the translation amount of the special-shaped translation rod reaches a certain limiting value, the rotating rod is driven to rotate around a rotating support point by the special-shaped translation rod, and displacement amplification is achieved. According to the multistage energy dissipation device, the earthquake energy can be dissipated under the action of earthquakes, the structural earthquake response is reduced, additionally, a building structure can be assisted to achieve self-resetting through the high-strength steel wire inhaul cable under medium and large earthquakes,and the structural post-earthquake residual displacement is reduced.

The invention discloses a self-resetting repairable high-performance prefabricated RC column. The self-resetting repairable high-performance prefabricated RC column comprises a replacement area, a transition area is arranged above the replacement area, a common concrete area is arranged above the transition area, the transition area and the replacement area are both formed by pouring ultra-high performance concrete (UHPC), and the common concrete area is formed by pouring common concrete; steel strands penetrating through the whole prefabricated RC column from top to bottom are arranged at the four corners of the prefabricated RC column in the longitudinal direction; the middle part is the prestressed steel strands penetrating through the whole prefabricated RC column from top to bottom; and common steel bars penetrating through the whole prefabricated RC column from top to bottom are arranged in the middle of the four faces of the prefabricated RC column in the longitudinal direction, the common steel bars in the replacement area are replaced by energy-consuming steel bars, the common steel bars and the energy-consuming steel bars are connected through threaded sleeves, and UHPC materials are poured on peripheries of the steel bars for wrapping. The RC column has low residual displacement and good self-resetting capacity under the action of low frequency cyclic loading, the energy-consuming steel bars in the replacement area can be replaced after being damaged, and the RC column can be conveniently repaired after an earthquake.

The invention relates to a curved beam bridge anti-creeping and anti-overturning device and a construction method. A beam body internal embedded steel plate is arranged in a curved beam bridge body, an upper steel plate group component is arranged at the lower end of the curved beam bridge body, the embedded steel plate and the upper steel plate group component are fixed through embedded bolts and nuts, and the piston assembly is bonded with a third steel plate group, a first steel plate and a fourth steel plate; a pier inner embedded steel plate is arranged in a pier abutment or a pier cap of the curved beam bridge pier, and a lower steel plate group component is arranged on the upper portion of the pier abutment or the pier cap of the curved beam bridge pier. and the upper steel plate group component is connected with the lower steel plate group component through a wedge block. By means of the device installed through the device, accumulated residual displacement when horizontal lateral movement happens to the curve beam bridge can be effectively reduced, the creepage disaster of the curve beam bridge is prevented, meanwhile, the anti-overturning capacity of the curve beam bridge can be improved, and the possibility that the curve beam bridge overturns and is damaged is effectively reduced.