16results about How to "Good self-resetting performance" patented technology

The invention discloses a self-resetting steel reinforced concrete frame with a swing wall and an assembly method thereof. Compared with a traditional reinforced concrete structure, the steel-reinforced concrete structure has the advantages of being large in bearing capacity, large in rigidity, good in anti-seismic performance and the like. The system comprises three parts, namely steel-reinforced concrete frames on the left side and the right side and a swing wall YBQ in the middle, wherein the steel-reinforced concrete frames on the left side and the right side comprise two steel-reinforced concrete columns and two steel-reinforced concrete beams; the steel-reinforced concrete column is connected with the steel-reinforced concrete beam through the beam-column joint LJD; the swing wall YBQ is connected with the frames on the two sides through the four flexible supports ZC. A column base joint ZJD is arranged at the bottom of the steel-reinforced concrete column and connected with a foundation through a foundation bolt. Under a horizontal earthquake, the swing column, the energy dissipation beam column joint and the swing wall act together, the anti-seismic capacity and the self-resetting capacity of the structure can be greatly improved, and meanwhile the energy dissipation joint is easy to install and can also be replaced after being damaged.

The invention discloses a self-resetting energy dissipation and shock absorption steel frame with flexible supports and an assembly method. The self-resetting structure gradually becomes a research hot spot, so that the structure can be quickly recovered after an earthquake, and the overhaul of the structure is reduced. The device comprises an I-shaped steel column which is vertically arranged, wherein the I-shaped steel column comprises two I-shaped steel side columns and an I-shaped steel middle column; a steel beam is horizontally arranged between the I-shaped steel columns, and the I-shaped steel columns and the steel beam are connected through sliding friction type beam column joints. The lower parts of the I-shaped steel side columns and the middle parts of the I-shaped steel middle columns are connected with supporting sections; the bottom of the I-shaped steel middle column is connected with a column foot. In the swinging process, the deformation range of the frame can be controlled, and the self-resetting function is achieved, so that safety and reliability are achieved; all the components are prefabricated components, and assembling and construction are easy.

The utility model discloses a variable-friction self-resetting SMA damper, and belongs to the field of concrete building structures. According to the variable-friction self-resetting SMA damper, the vertical baffle, the first friction plate, the push-pull rod, the second friction plate, the friction plate, the SMA rod, the limiting device and the multiple friction sliding devices are arranged, so that the whole device can drive the friction sliding devices to move through the push-pull rod, and then the SMA rod is stretched; the friction force can be increased along with the increase of the external load, the SMA bars are always in a tension state no matter whether the structure is pulled or pressed, the tension resistance of the SMA bars can be fully exerted, and therefore the overall anti-seismic performance of the structure is improved.

The invention discloses a low-damage self-resetting concrete column foot connecting joint structure and a construction method, the low-damage self-resetting concrete column foot connecting joint structure comprises a concrete foundation, a low-damage prefabricated concrete frame column, a prestressed steel strand and a low-yield-point energy-consuming reinforcing steel bar, the prestressed steel strand penetrates through the concrete foundation and the low-damage prefabricated concrete frame column and is tensioned and anchored; the concrete foundation and the low-damage prefabricated concrete frame columns are connected; the low-yield-point energy-consuming steel bars are pre-buried at the bottoms of the low-damage prefabricated concrete frame columns; the problems that in an existing multi-layer self-resetting concrete bottom layer column foot connecting joint, column bottom concrete is seriously damaged by pressure under the action of a high axial compression ratio and in a large deformation state, and resetting after an earthquake is affected are solved, meanwhile, the energy dissipation capacity of a component is improved by combining the energy dissipation steel bars, damage and residual deformation of the concrete at the end of the component under the action of the earthquake are reduced, and the energy dissipation performance is improved. And the repairable performance of the structure is improved.

The invention relates to the technical field of cables, and discloses an environment-friendly cable with a protection function and a preparation method. Comprising an inner steel cable and further comprises a retroflexure spring which is arranged on the inner steel cable in a sleeving mode, an inner sleeve is arranged on the retroflexure spring in a sleeving mode, a set of first rolling connecting pieces which are regularly distributed are installed on the inner sleeve, a round supporting body is arranged on the outer sides of the first rolling connecting pieces, and a set of air containing cavities which are regularly distributed and a set of glue containing cavities which are regularly distributed are formed in the round supporting body; each air containing cavity is internally provided with a battery cell module and is filled with carbon dioxide, and each glue containing cavity is internally provided with an anti-buckling assembly and a group of regularly distributed second rolling connecting pieces. The cable has multidirectional compression resistance, passive fire prevention and active fire extinguishing performance in use, the cable is structurally provided with an anti-wear protection structure, the service life of the cable is effectively prolonged, and meanwhile, the cable is provided with an electric leakage color development and temperature change color development structure, so that the working state of the cable can be monitored in real time.

The invention provides a tensile friction pendulum shock insulation support. The tensile friction pendulum shock insulation support comprises a lower base plate, an upper base plate and a sliding body. Wherein the upper seat plate and the lower seat plate are arranged on the two sides of the sliding body in a crossed mode, and the sliding body is arranged between the lower seat plate and the upper seat plate and connected with the lower seat plate and the upper seat plate in a sliding mode. Sliding rails are arranged in the lower seat plate and the upper seat plate, the sliding body achieves displacement in the horizontal direction through the sliding rails when stressed, and meanwhile the lower seat plate and the upper seat plate achieve rotation in the vertical direction through the sliding body. The cross shaft is arranged between the upper sliding body and the lower sliding body, and the lower sliding body is changed into the circular cambered surface, so that the sliding bodies can rotate in any direction, the application situation of a common tensile friction pendulum shock insulation support is expanded, the sliding bodies have the rotating capacity in the vertical direction, and the service life of the sliding bodies is prolonged. And the device can adapt to corners caused by vertical lift-off in a product application structure.

The application discloses a large-span prestressed steel structure energy dissipation and vibration reduction self-resetting cable device, which comprises a baffle arranged on the left and right sides, a cable penetrating through the baffles, a cushion block and an anchor for anchoring the cable, a steel pull rod penetrating through the left and right baffles in sequence, a cushion plate welded at the two ends of the steel pull rod, a steel strand penetrating through the center of the steel pull rod, a second anchor for anchoring the steel strand, a spiral spring nested outside the steel pull rod and welded at the inner sides of the left and right baffles at the two ends, respectively, an upper dislocation plate welded at the inner side of the left baffle, a lower dislocation plate welded at the inner side of the right baffle, an energy dissipation device penetrating through upper and lower strip-shaped bolt holes in sequence, wherein the energy dissipation device comprises a screw rod, upper and lower nuts and upper and lower friction gaskets, and further comprises a friction energy dissipation block embedded between the upper and lower dislocation plates and a stopper for preventing the friction energy dissipation block from falling off; the device can realize energy dissipation and vibration reduction through the tensile and compressive deformation of the spiral spring and the relative sliding of the upper and lower dislocation plates, and can realize the self-resetting function through the steel strand in the steel pull rod and the spiral spring.

The present invention provides a bridge pier in a strong earthquake area and a post-earthquake repair method thereof. When the earthquake force is relatively small, the outer tubular ductile section can be deformed to dissipate energy without the need for repair, and the tubular ductile section can heal itself after the earthquake, thereby ensuring that a small earthquake will not damage it. When the earthquake force is relatively large, the first tubular ductile section and the second tubular ductile section with relatively small structural strength are first crushed and destroyed to dissipate energy, so as to facilitate subsequent targeted repair of the area. When a large earthquake occurs, even if the first tubular ductile section and the second tubular ductile section are crushed and destroyed, the first central bearing column and the second central bearing column and the damaged first tubular ductile section and the second tubular ductile section can still support traffic loads such as emergency rescue vehicles. During the repair period, the first central bearing column and the second central bearing column independently bear the deadweight of the upper bridge, without the need for cumbersome temporary reinforcement and support measures, and can economically and reasonably achieve the design goals of not being damaged by a small earthquake, being repairable by a medium earthquake, and not collapsing by a large earthquake.

The invention provides a prefabricated self-resetting energy dissipation combination column structure, and relates to the technical field of seismic resistance and seismic mitigation and isolation devices. The device comprises an upper column body and a lower column body, two parallel connecting sliding rails are arranged at the bottom of the upper column body, a sliding groove is formed between the connecting sliding rails, a mounting hole communicated with the sliding groove is formed in the tail end of the sliding groove, and a self-resetting buckle which can slide along the sliding groove and is clamped with the mounting hole in a matched mode is arranged at the top of the lower column body. The limiting block and the connecting sliding rail are installed in a matched and sliding mode, and the top end and the bottom end of the limiting block are detachably connected with the upper column body and the lower column body through fasteners respectively. The connecting sliding rail at the bottom of the upper column body and the self-resetting buckle at the top of the lower column body are rapidly spliced to achieve rapid and stable installation of the column bodies, the advantage of being easy and convenient to construct is achieved, all components are prefabricated in a factory and rapidly assembled on a construction site, and material waste and environmental pollution are reduced while the connecting quality and safety are guaranteed; and the method has good economical efficiency.

The invention provides a plane multidirectional bridge damping energy consumption device with a self-resetting function and a restoring force calculation method thereof. The device comprises an upper movable block, a lower connecting plate system, a connecting rod system and an SMA inhaul cable system. The lower connecting plate system is composed of a lower connecting plate, a sliding bearing, a limiting check block, a fixed pulley, a double-layer fixed pulley and an anchoring plate. The connecting rod system is composed of a push plate, a first connecting rod, a sleeve bolt check block, a second connecting rod, a connecting piece and a movable pulley. The SMA inhaul cable system is composed of SMA inhaul cables, bolts and nuts, the SMA inhaul cables surround the inner sides and the outer sides of the fixed pulleys and the movable pulleys respectively, and the two ends of each SMA inhaul cable are anchored to the anchoring plates through the bolts. The upper movable blocks can push the corresponding push plates to move in any direction of the plane, the SMA inhaul cables are lengthened to achieve the damping, energy dissipation and self-resetting functions, and the limiting check blocks achieve the limiting function by limiting the movement range of the push plates. And analyzing the geometrical relationship between the movement distance of the upper movable block and the elongation of the SMA inhaul cable to obtain a calculation method of the restoring force of the device. The size of the device can be reduced, bidirectional self-resetting and limiting functions are provided, and the use efficiency of the SMA inhaul cable is improved.

The present invention relates to the field of seismic isolation and shock absorption of engineering structures, and discloses a swing-type bearing, wherein the bearing includes an upper bearing plate and a lower bearing plate, and also includes a support member, the support member is placed on the lower bearing plate, the upper bearing plate is placed on the support member, the bottom surface of the upper bearing plate and the top surface of the lower bearing plate are respectively connected with a plurality of shear keys on the periphery of the support member, the distance between the lower end of the shear key connected to the upper bearing plate and the side wall of the support member is greater than the distance between the upper end and the side wall of the support member, and the distance between the upper end of the shear key connected to the lower bearing plate and the side wall of the support member is greater than the distance between the lower end and the side wall of the support member. The swing-type bearing provided by the present invention can change the vibration frequency of the structure through the swinging of the support member in the bearing, and at the same time, the bearing has good self-resetting ability under the deadweight of the upper structure, thereby overcoming the shear failure problem of the bearing in the existing engineering structure in a strong earthquake, and improving the post-earthquake functional recoverability of the overall engineering structure.

The utility model discloses an anti-beam-falling self-resetting displacement monitoring device applied to an inverted T-shaped capping beam simply supported girder bridge. The anti-beam-falling self-resetting displacement monitoring device comprises a sliding rail cylinder, a T-shaped sliding rod, a main beam connecting steel plate, a capping beam connecting steel plate, a fixed steel plate and a disc spring, one end of the sliding rail cylinder is fixedly arranged on the main beam connecting steel plate, and the other end of the sliding rail cylinder is provided with a disc spring; the T-shaped sliding rod comprises a rotating rod, a rotating shaft rod and a round base plate, the rotating rod is inserted into a rail of the sliding rail cylinder in the radial direction of the sliding rail cylinder, one end of the rotating shaft rod is perpendicularly connected to the center of the rotating rod, and the other end of the rotating shaft rod sequentially penetrates through the sliding rail cylinder and the fixed steel plate in the axial direction of the sliding rail cylinder and then is in limiting connection with the bent cap connecting steel plate. And a round base plate is arranged at the end part of the other end of the rotating shaft rod and is embedded on the bent cap connecting steel plate. According to the utility model, the connection between the beam bodies is established, greater earthquake action can be resisted, and early warning can be carried out through the displacement monitoring system, so that the safety of pedestrians and vehicles is ensured.

The present invention discloses a vibration isolation and vibration reduction support based on memory alloy, comprising a leaf spring group, an upper panel and a lower panel, wherein the leaf spring group is made of memory metal; when working, when the upper panel or the lower panel is under the vibration load, the relative vertical spacing between them will change, on the one hand, the memory alloy leaf spring group is compressed and deformed to absorb energy or recover to its original state to release energy, thus achieving the purpose of vibration isolation and vibration reduction by relying on the unique structure and material characteristics of the memory alloy leaf spring group, on the other hand, the memory alloy rope is also stretched or retracted with the alternating deformation of the memory alloy leaf spring group, and the structure and material function of the memory alloy rope provide greater hysteresis energy consumption and restoring force. The present invention can effectively resist vertical vibration, has good damping effect, strong energy consumption capacity, has extremely high reliability and stability when working for a long time, and can automatically recover after re-vibration without the need for additional reset device.

The invention discloses an RC bridge pier structure under shear-torsion composite stress and a construction method thereof, and belongs to the technical field of bridge engineering.The bridge pier structure comprises a pier column and a plurality of longitudinal bars arranged in the pier column, and the longitudinal bars are fixedly connected through two symmetrically-arranged spiral stirrups; the pier column comprises cast-in-place layers formed by pouring common concrete and a swing layer arranged between the two cast-in-place layers and formed by pouring ECC, the longitudinal bars comprise steel bars arranged in the cast-in-place layers and SMA bars arranged in the swing layer and fixedly connected with the steel bars, and rotating hinges are arranged in the swing layer. The two ends of the rotating hinge are fixedly connected with a plurality of inclined ribs extending outwards in the circumferential direction around the center of the rotating hinge, and the ends, away from the rotating hinge, of the inclined ribs extend into the bearing platform. Through the inhibition effect of the spiral stirrups and the inclined ribs on the cracks, the deformation energy dissipation effect of the ECC and SMA bars and the swinging effect of the rotating hinges, the pier has different energy dissipation paths when facing different earthquake effects, the anti-seismic redundancy is improved, and rapid repairing can be achieved after an earthquake.

The application discloses an assembled self-resetting energy dissipation bridge block, which comprises a block, wherein the block is connected to the outrigger of the cap beam on both sides through prestressed reinforcement, a damper is connected between the side surface of the block and the side surface of the cap beam body, a rubber pad is connected to the upper part of the side surface of the block, and the rubber pad is arranged on the side surface of the beam body above the cap beam. The assembled block is used to replace the fixed block, the block is arranged at the outrigger of the cap beam, the block and the outrigger of the cap beam are connected through the prestressed reinforcement, a disc spring is arranged at the top end anchoring position of the prestressed reinforcement, the tensioning of the prestressed reinforcement is realized, the installation stability of the block is ensured, the lower part of the side surface of the block is connected to the cap beam body through the U-shaped damper, and the rubber pad is arranged on the upper part of the side surface of the block. The transverse displacement of the block is effectively reduced, the damper can drive the block to reset, the residual deformation caused by vibration is reduced, the impact of the upper beam body structure on the block is buffered, and the self-resetting capacity of the whole anti-seismic block system is improved.

The present invention discloses a displacement amplification type self-resetting shear damper, including a bearing member, an outer friction plate, an inner friction plate, a lever member, a partition, a prestressed bolt and a disc spring. The bearing members on both sides, the inner friction plate and the lever member constitute a lever system, and the friction slopes of the inner friction plate and the outer friction plate fit each other. When a bearing member undergoes a vertical relative displacement, the inner friction plate is pulled to produce a larger vertical displacement, and the outer friction plate is pushed outward along the friction slope, compressing the disc spring string combination to produce axial compression elastic deformation. After the external shear load of the bearing member is unloaded, the vertical relative displacement between the inner friction plate and the outer friction plate gradually recovers, and the axial compression elasticity of the disc spring string combination automatically recovers, realizing the self-resetting function of the damper. A friction plate or viscoelastic material is used between the inner friction plate and the support plate to realize displacement-related or displacement and speed-related energy dissipation. The hysteresis curve of the damper of the present invention presents a typical flag-shaped shape, and has good self-resetting and energy dissipation capabilities.