307results about How to "Reduce residual deformation" patented technology

The invention relates to a node connection device for a self-centering prestressed concrete frame. The node connection device is a device used for the connection between the beam and the column of a prefabricated reinforced concrete frame, and aims at improving energy consumption of a frame structure under seismic action and eliminating or reducing the residual deformation and damage of the frame structure. The connection device is characterized in that combined steel parts form an energy consuming device, two external friction steel plates (3) are arranged in the energy consuming device, are respectively and symmetrically arranged on the two sides of a column end reinforcing steel plate (4) and are connected with the column end reinforcing steel plate (4) into a whole body, two internal friction steel plates (8) are arranged between the two external friction steel plates (3), the upper end and the lower end of each internal friction steel plate (8) are respectively provided with a bean end reinforcing steel plate (5), friction discs (15) are respectively arranged between the two internal friction steel plates (8) and the two external friction steel plates (3), and friction-type high-strength bolts (12) penetrate through the external friction steel plates (3), the friction discs (15), the internal friction steel plates (8) and a prefabricated concrete beam (2) and connect all parts together.

The invention discloses an external energy-consumption self-resetting bridge pier stud structure system and a realization method thereof, belonging to the field of bridgework. The structure system mainly comprises a bridge pier stud, a bridge abutment, an unbonded prestressed reinforcement, an external energy consumption device, a pier embedded part and a bridge abutment embedded part, wherein the bridge pier stud and the bridge abutment are connected by the unbonded prestressed reinforcement and the external energy consumption device, so that residual deformation can be effectively reduced, and energy consumption can be guaranteed. The external energy-consumption self-resetting bridge pier stud structure system is flexible in design and has specific structure stress. The unbonded prestressed reinforcement on the axis position of the pier stud can be used for generating self-resetting restoring force. The problem that the traditional bridge pier has larger residual deformation and cannot continuously serve after the earthquake loading action is solved. The bridge pier has enough strength and rigidity. The external energy-consumption self-resetting bridge pier stud structure system is realized in a cast-in-situ or prefabricating mode and is easy to construct and is a novel pier stud structure system which is advanced and practical and can realize quick replacement and repair after the earthquake..

The invention relates to a mixed type shape memory alloy multi-dimensional vibration isolator, which belongs to the technical field of civil engineering. The vibration isolator mainly comprises an upper flange, an internal cylinder, martensite shape memory alloy energy-consuming springs, austenite shape memory alloy twisted lines, an external cylinder, a base plate, thin-wall shape memory alloy hollow balls and a lower flange. The vibration isolator is characterized in that the upper end of the internal cylinder is connected with the upper flange while the lower end is connected with the base plate, the lower end of the external cylinder is connected with the lower flange, the internal cylinder is connected with the external cylinder through three layers of the martensite shape memory alloy energy-consuming springs and the twisted lines, and the shape memory alloy twisted lines are penetrated in the shape memory alloy energy-consuming springs; each layer contains eight groups of the shape memory alloy energy-consuming springs and the twisted lines which are arranged symmetrically along the circumferential radial direction of the internal cylinder; three layers of the thin-wall shape memory alloy hollow balls are placed in the external cylinder; and the vibration isolator is fixed on a part of which the structure needs vibration control by the upper flange and the lower flange. The vibration isolator has the advantages of comprehensively utilizing the hyperelasticity and the high damping characteristic of shape memory alloys and achieving the multi-dimensional direction vibration control.

The invention relates to a corrugated web plate H-shaped profile steel composite bean, belonging to the technical field of building profile materials . The cross section port type comprises a corrugated web plate and an upper and lower flange joints. The upper flange is in parallel with the lower flange; the web plate is vertical to the upper flange and the lower flange; the web plate is connected with the flanges by single-sided fillet weld; the web plate is a trapezoid ripple or a sine curve ripple, wherein the lengthwise direction of the trapezoid ripple is repeated periodically. The upper part of a composite beam is a reinforced concrete swing plate and a profiled steel sheet. The upper flange, the reinforced concrete plate and the profiled steel sheet are connected by a plurality of studs; the reinforced concrete swing plate can be connected with the profiled steel sheet by additional lateral steel bar. The traditional hot-rolling joist steel and H-shaped profile steel composite beam can be replaced by the corrugated web plate H-shaped profile steel composite bean which has the wider application than joist steel and H-shaped profile steel composite beam; the maximization can be realized for special field and special location comprising the construction of large span industrial and civil building and large span bridge.

The invention relates to a self reset curvature-prevention support component, which relates to a curvature-prevention support component. The invention aims at solving the problems that the existing structure for installing a traditional curvature-prevention support component generates excessive residual deformation after major earthquake or moderate earthquake, so the maintenance and rebuilding cost after the earthquake is greatly increased, and the existing friction type self reset support component can not consume the earthquake energy because of the looseness of connecting screw bolts of a friction plate and easy ageing of the friction surface. A square inner sleeve pipe, two energy consumption inner core plates and a first convex connecting plate are connected in a square inner sleeve pipe, each connecting plate is fixedly connected with a pair of angle irons, one end of each reset rib is connected with a first end plate, the other end of each reset rib is connected with a second end plate, the first convex connecting plate passes through a through hole of the first end plate to be arranged outside the first end plate, two side surfaces of a square outer sleeve pipe are respectively in contact with the first end plate and the second end plate, and the second convex connecting plate is fixedly connected in the two pairs of angle irons. The invention is used in lateral-force-resistance components in the field of building structure engineering.

The invention discloses a self-resetting friction-changing damper comprising a barrel, a baffle, a sliding shaft, an attachment joint, two fixed bases and a pair of damping mechanisms. The baffle is fixedly arranged in the barrel and provided with a through hole; the sliding shaft relatively slidingly penetrates through the through hole and a first end of the sliding shaft extends out of the barrel; the attachment joint is fixedly arranged at the first end of the sliding shaft; the two fixed bases are arranged on the bilateral sides of the baffle; each damping mechanism comprises an elastomer and a friction assembly, two ends of the elastomer are respectively abutted against the baffle and the friction assembly; the friction assembly comprises two extruding wedges and a plurality of friction wedges, the mutual opposite surfaces of the extruding wedges are circular cone guiding surfaces, and the friction wedges can be slidingly and circumferentially arranged between the circular cone guide surfaces of the two extruding wedges at intervals. By the self-resetting friction-changing damper, friction can be self adjusted according to the major structure displacement response, and a plurality of hysteretic curves can be displayed by adjusting parameters, and the self-resetting friction-changing damper has the function of self-resetting and strong engineering applicability.

The invention discloses a corrosion-resistant self-centering bridge pier structure easy for seismic rehabilitation. The self-centering bridge pier structure comprises a concrete bearing platform, prefabricated bridge pier sections, post-tensioned prestressed FRP (Fiber Reinforced Plastic) bars, bearing platform embedded bars, FRP connecting sleeves, anti-rust energy consumption bars, bracket lower nuts, bracket lower backup plates, brackets, bracket upper nuts, bracket upper backup plates, bracket reserved pore canals, a bearing platform reserved pore canal and an anchor, wherein the prefabricated bridge pier sections are placed on the downward concave part in the middle of the top surface of the concrete bearing platform; the bearing platform embedded bars are uniformly distributed around the downward concave part; the bearing platform reserved pore canal is arranged in the center of the downward concave part; and the prefabricated bridge pier sections are connected with the concrete bearing platform through the post-tensioned prestressed FRP bars. The structure has a self-centering function, the residual deformation of the structure is effectively eliminated or reduced, and the bottom of a bridge pier is protected through the FRP sleeves to prevent crush caused by local compressive stress.

Automatic-resetting super elasticity shape memory alloy damper is a damping control device used in the areas of civil construction and mechanical engineering technique .It is characteristiced by its framework that consisted of a working piston , a fixing piston , a cylinder ,a cover and a joint rod .The machine uses its alloy wire to restrict the left and right pistons to the partition-wall of the cylinderand the spacing nut. when the pull bar works, piston in one side works follow it ,the piston in the other side is resisted by the partition-wall of the cylinder and keep the resetting alloy wire on running and produce a great anamorphosis restoration ability.The pre-strain resetting super elasticity shape memory alloy wires are divided into tow groups, one of which is used to connect the right fixing piston to the left coverand, the other is used to bind the left fixing piston to the right cover.the two groups doing a interchange push and pull in the pull bars in order to create a bigger energy consumption. The invention simultaneously has the functions of good energy consumption and resetting.It can reduce the vibration of fabrics, components or the remained deformation and has simple structure.

The invention relates to a novel reinforced-concrete combined pier column. The combined pier column comprises a fibre-reinforced composite material pipe, wherein a plurality of common reinforcing steel bars and a plurality of fibre bars are arranged in the fibre-reinforced composite material pipe in a distributing way along the length direction of the fibre-reinforced composite material pipe, these common reinforcing steel bars and these fibre bars are all coiled at the middle part in the fibre-reinforced composite material pipe by a plurality of hooping bars, and concrete is poured in the fibre-reinforced composite material pipe. The invention also relates to a corresponding construction method of the novel reinforced-concrete combined pier column. According to the novel reinforced-concrete combined pier column and the construction method of the novel reinforced-concrete combined pier column, the bearing capacity of a pier column structure can be enhanced; moreover, the shock resisting performance of a pier column and the recoverable performance after shock can be effectively enhanced; furthermore, the self weight of the structure is decreased; and the novel reinforced-concrete combined pier column has the characteristic of corrosion resistance under severe environments, such as ocean, humidity, saline-alkali soil and the like.

The invention relates to a pipe sheet friction welding method, and is characterized by simple process, high quality of welded joint and low residual stress. It is used for welding of aluminum alloy, magnesium alloy,copper and copper alloy and various magnesium alloy and steel.

A soft PUR foam prepared by using rapeseed oil, is produced according to the following steps: 1) taking rapeseed oil and epoxy agent for epoxidation reaction in the presence of catalyst, 2) taking epoxy rapeseed oil and nucleophilic reagent containing reactive hydrogen for epoxy ring opening reaction to generate the mixed hydroxy fatty acids triglycerides, 3) adding alcoholysis agent for alcoholysis reaction to generate bio-radical polyol, 4) conducting bio-radical polyol and oxy-olefin for polyaddition reaction to generate the bio-radical polyether polyol, 5) taking bio-radical polyether polyol and polyether polyol and / or polyester polyol as raw materials, supported by catalyst, foam stabilizer, foaming agent to prepare combined polyether polyol, 6) mixing the combined polyether polyol and isocyanate evenly for foaming reaction to produce the invention.

The invention discloses a water-insensitive polyurethane injecting paste material, and a preparation method thereof. The water-insensitive polyurethane injecting paste material comprises a component A and a component B at a volume ratio of 1:1-1:1.2; the component A is a mixture of polyhydric alcohol-modified methylene diphenyl diisocyanate and polyaryl polymethylene isocyanate; and the component B is a mixture of a polyhydric alcohol, a plasticizer, a chain extender, a catalyst, a surfactant, and a foaming agent. According to the preparation method, the raw materials with excellent structures are selected, mixing of the raw materials at a certain ratio is carried out, and the water-insensitive polyurethane injecting paste material is provided with excellent water insensitivity because of physical and chemical synergistic effects of the raw materials, so that bearing capacity and durability of the water-insensitive polyurethane injecting paste material at a water-rich environment are improved greatly.

A high energy dissipation self-resetting beam-column joint based on shape memory alloy screws comprises a beam end assembly, a column end assembly, an energy-dissipating element, a self-resetting element and a shear-resistant element. The energy-dissipating element is made of a low-strength high-energy-dissipation steel angle, and two limbs of the steel angle are connected with a column flange and a beam flange through high-strength bolts, respectively. The self-resetting element is made of a shape memory alloy screw having super elasticity, one end of the screw is connected with a column, and the other is connected with a beam. The shear-resistant element is made of a double-side shear-resistant plate having an elongated bolt hole. The shape memory alloy screw needs to be applied initial prestress to ensure that the screw is constantly stressed during operating. The invention further provides a method of thermally treating and training the shape memory alloy screw and a method of applying the initial prestress to the shape memory alloy screw. The invention has the advantages that higher initial screw prestress may be applied, initial rigidity is higher, self-resetting capacity is excellent, and hysteretic energy capacity is better.

The invention discloses a disc spring self-resetting joint connecting device, and belongs to the technical field of building structure engineering. The disc spring self-resetting joint connecting device is composed of a steel column, a cantilever short beam, a middle beam, a disc spring resetting device, a U-shaped damper, a connecting steel plate, a column stiffening rib, an anchoring plate, a beam stiffening rib and a high-strength bolt. The steel column and the cantilever short beam are welded, the cantilever short beam is in bolted connection with the middle beam through the connecting steel plate, and the disc spring resetting device and the U-shaped damper are arranged between upper and lower flanges of the steel beam. Under an earthquake action, joints bear bending moment and shearing force through the U-shaped damper and the connecting steel plate, energy input from the outside is consumed, after the earthquake action disappears, self-resetting of the joints is achieved throughthe disc spring resetting device, and a structure is not damaged or slightly damaged after an earthquake. A disc spring self-resetting joint connecting method is simple and convenient, the structureis simple, bolt connection is mostly adopted, assembling can be achieved, and if a component is damaged after the earthquake, the component can be replaced in time. The disc spring self-resetting joint connecting device can be widely applied to the technical field of shock absorption and energy dissipation of building structures.

The invention discloses a prefabricated assembly pier system with separated load bearing and anti-seismic mechanisms and belongs to the field of bridge engineering. The prefabricated assembly pier system with the separated load bearing and anti-seismic mechanisms comprises a bearing platform, a pier bottom segment, pier upper segments and a capping beam; the pier bottom segment comprises a horizontal anti-seismic member and a vertical bearing member; fiber mortar beds are arranged between the pier upper segments and the pier bottom segment, between the pier upper segments and between the pierupper segments and the capping beam; steel bar shear keys are arranged between the pier upper segments and the pier bottom segment, between the pier upper segments and between the pier upper segmentsand the capping beam to connect the pier upper segments with the pier bottom segment, connect the pier upper segments and connect the pier upper segments with the capping beam; the pier bottom segmentand the bearing platform are poured together; the pier bottom segment and the pier upper segments are connected with each other through sleeves to form a whole body; and the pier upper segments and the capping beam are connected with each other through corrugated pipes to form a whole body. According to the prefabricated assembly pier system with the separated load bearing and anti-seismic mechanisms, the repairing speed of the pier after earthquakes is increased, and the disturbance to the surrounding environment is reduced; and the prefabricated assembly pier system with the separated loadbearing and anti-seismic mechanisms has important instruction significance for promoting the application of a prefabricated assembly technology in high intensity areas.

The present invention relates to a convolution forming method of a helical blade and a forming device thereof. A steel belt is fixed on a fixing mould; the fixing mould and a dynamic mould are closed to hold the steel belt; the transmission shaft of a convolution machine rotates to drive the steel belt to vertically rotate along with the central mandril of the fixing mould, so that the helical blade with the helical surface being overlapped is produced; the helical blade is stretched by a professional stretching device to obtain the required helical distance. The present invention also relates to a convolution forming device of a helical blade; an output shaft of a reducer of the device is connected with a transmission shaft through a transmission element; one side of the fixing mould is firmly connected with one end of the transmission shaft, and the other side of the fixing mould is provided with a central mandril; the two sides of the dynamic mould are supported on a guiding device; the rear side of the guiding device is connected with a press-molding device. A material guiding device is arranged at the outer side of the working surface of the fixing mould and the dynamic mould. The convolution forming method of the present invention reduces the production procedures, and improves the material utilization rate and the production efficiency; the thickness of the produced helical blade is equal, and the mechanics performance is uniform.

The invention discloses a self-resetting anti-bent support based on a belleville spring. Under small displacement, namely under the small shocking effect, when a main body structure is in an elastic state, energy can be consumed through friction among all discs and between the discs and intermediate clapboards. In addition, self-resetting after the self-resetting anti-bent support is shocked can be achieved, residual deformation of a structure is reduced, and after being shocked, the self-resetting anti-bent support can continuously work after appropriate maintenance, and an original supporting component does not need to be replaced.

The invention discloses an assembly type beam column joint and a construction method thereof. An upper flange of a connecting pair is connected with an upper flange of an H-shaped steel beam through bolts; a lower flange of the connecting pair is connected with a lower flange of the H-shaped steel beam through bolts; holes, which are connected with the bolts, of the upper flange and the lower flange of the connecting pair are slot holes of which the length directions are positioned in the length direction of the H-shaped steel beam; and an end plate of the connecting pair is attached to a concrete column. The construction method comprises the following steps of (1) manufacturing the concrete column; (2) manufacturing the H-shaped steel beam and the connecting pair; (3) mounting a particle damping energy-consuming device; (4) connecting the H-shaped steel beam and the connecting pair; and (5) connecting the column and the beam. When an earthquake comes, the bolts can slide in the slot holes, and earthquake energy can be consumed. Even if the joint deforms greatly, attenuation of strength and rigidity and participation deformation are small, residual deformation of the joint can be reduced after the earthquake, and the assembly type beam column joint has good deformation recovery capability and structure function recoverability.

The invention discloses a self-resetting energy dissipation system with a fabricated frame structure and a construction method of the self-resetting energy dissipation system. The self-resetting energy dissipation system includes a prefabricated column connected with a foundation, a prefabricated reinforced concrete cross beam, a prefabricated reinforced concrete beam column sub-structure and dryconnection, and further includes a self-resetting energy dissipation device arranged between interbedded prefabricated frames; and the dry connection includes friction-type high-strength bolt connection between columns and pin shaft connection between beam-beam artificial plastic hinge connecting nodes. The invention further discloses the construction method for the self-resetting energy dissipation system with the fabricated frame structure. According to the self-resetting energy dissipation system with the fabricated frame structure and the construction method of the self-resetting energy dissipation system, the shortcomings of current prefabricated structural systems are overcome, and an anti-seismic target of 'strong column and weak beam, strong node and weak component' is realized; through reasonable arrangement of the self-resetting energy dissipation device, the energy dissipation capacity of the structural system is enhanced, residual deformation of the structure is effectivelyreduced or avoided, and the allimportant social value and economic significance for effectively mitigating earthquake disasters in high-intensity areas are achieved; and meanwhile, the construction process is simplified, the construction quality is guaranteed, practicality is high, and use and promotion are convenient.

The invention relates to a novel controlled swing frame system with self-resetting energy-dissipating supports, which belongs to the field of anti-seismic structural systems. It is mainly composed of frame columns, frame beams, self-resetting energy-dissipating supports, controlled beam-column nodes, controlled column foot nodes and foundations. The main controlled frame structure is subjected to vertical loads. When the structural system is subjected to an earthquake, the self-resetting energy-dissipating supports dissipate the seismic energy and provide lateral stiffness and restoring force to protect the main controlled frame structure from damage.

The invention relates to a prefabricated self-centering energy dissipation bracing with I-shaped inner tube and prestressed disc springs. An outer tube left retainer and an outer tube right retainer are fixed to upper and lower inner walls of an outer tube steel plate; the inner tube includes an inner tube middle HW shaped beam and inner tube bilateral I-shaped beams welded to two ends of the inner tube middle HW shaped beam; the parts of upper and lower flange outer sides of the inner tube middle HW shaped beam corresponding to the outer tube left retainer and the inner tube right retainer are fixedly provided with an inner tube left friction pad and an inner tube right friction pad respectively, a first disc spring and a second disc spring sleeve the inner tube bilateral I-shaped beams, a first disc spring left retaining plate and a first disc spring right retaining plate are arranged on two sides of the first disc spring, and a second disc spring right retaining plate and a second disc spring right retaining plate are arranged on two sides of the second disc spring. The prefabricated self-centering energy dissipation bracing with I-shaped inner tube and prestressed disc springs is of prefabricated type, is free to assemble, has reduced welding and accordingly better load-carrying capacity, and is low in processing cost and simple to mount.

The invention discloses a flange friction type shape memory alloy rod self-restoring steel frame beam-edge column joint. The flange friction type shape memory alloy rod self-restoring steel frame beam-edge column joint comprises a steel column, a steel beam, a shape memory alloy rod, an L-shaped bracket, a shear plate and a friction energy dissipater, wherein the steel beam is located on one side of the steel column, the shape memory alloy rod transversely penetrates through the steel column, the L-shaped bracket is located at the inner side of a steel beam flange, the shear plate is located in the middle position of a steel beam web plate, and the friction energy dissipater is located at the outer side the steel beam flange; the friction energy dissipater comprises a steel plate, an energy-dissipation friction sheet and high-strength bolts, wherein the steel plate is arranged at the outer side of the steel beam flange, the position between the steel plate and the steel beam flange is filled with the energy-dissipation friction sheet, and the high-strength bolts penetrate the steel beam flange to connect the steel plate, the energy-dissipation friction sheet and the L-shaped bracket. According to the flange friction type shape memory alloy rod self-restoring steel frame beam-edge column joint, the stable energy-dissipation capacity of the joint can be improved significantly, and the self-restoring performance of the joint is achieved at the same time by utilizing super elasticity of shape memory alloy; and convenience of floor arrangement of the position of the joint and replaceability of components are improved, and the ability of resisting local buckling deformity of the steel beam flange is strengthened by reasonable designing for the joint structure.

The invention provides a prestress assembly type high-performance concrete-filled square steel tubular column-concrete beam joint. The joint comprises a concrete-filled square steel tubular column, reinforced concrete beams and prestressing tendons, wherein prestressing tendon channels matched with one another are arranged in the concrete-filled square steel tubular column and the reinforced concrete beams; the concrete-filled square steel tubular column is connected with the insides of the reinforced concrete beams through the prestressing tendons penetrating through the prestressing tendon channels; the concrete-filled square steel tubular column is connected with outsides of the reinforced concrete beams through angle steel. The main construction steps are as follows: (1) manufacturing of the concrete-filled square steel tubular column; (2) manufacturing of the concrete beams; (3) on-site mounting. Compared with common beam-column joints, the joint has the advantages that the ductility is good, construction is simple and convenient, members are easy to replace, the anti-seismic performance is good and the like.

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 a fabricated self-resetting concrete frame soft steel energy dissipation composite joint. The fabricated self-resetting concrete frame soft steel energy dissipation composite joint includes a prefabricated reinforced concrete column, a prefabricated reinforced concrete beam, soft steel dampers, a pre-stressed steel strand, embedded high-strength bolts and anchored steel bars, wherein the prefabricated reinforced concrete beam is provided with a beam end embedded steel sleeve, and a column end embedded steel plate is arranged at the butt-joint position between the prefabricated reinforced concrete column and the beam end embedded steel sleeve; the pre-stressed steel strand penetrates through a pre-stressed steel strand hole channel of the prefabricated reinforced concrete column, a pre-stressed steel strand opening of the column end embedded steel plate, a pre-stressed steel strand opening of the beam end embedded steel sleeve and the pre-stressed steel strand channel of the prefabricated reinforced concrete beam in sequence, so that the prefabricated reinforced concrete column and the prefabricated reinforced concrete beam are spliced together; and the soft steel dampers are arranged on both sides of a web plate of the section steel part of the beam end embedded steel sleeve. The fabricated self-resetting concrete frame soft steel energy dissipation composite joint enables the prefabricated concrete frame structure to have excellent seismic performance and self-resetting ability under high earthquake intensity.

The invention discloses a fiber pre-draw-rod type self-centering round tube buckling restrained support which comprises a core energy-consumption round tube, an inner restrained round tube arranged in the core energy-consumption round tube, an outer restrained round tube sleeved outside the core energy-consumption round tube, two end plates arranged at two ends of the energy-consumption round tube, a fiber drawing rod for connecting the two end plates and connection parts connected with the end plates. The inner wall on one side of the core energy-consumption round tube is connected with one end of the inner restrained round tube, the outer wall on the other side of the core energy-consumption round tube is connected with one end of the outer restrained round tube, small holes distributed in array mode are arranged on the tube wall of the core energy-consumption round tube, a plurality of groove openings are arranged at two ends of the core energy-consumption round tube, notches matched with the end portion of the core energy-consumption round tube are arranged on the end plates, the end plates are inserted into the groove openings to be contacted with the end portions of the inner restrained round tube and the outer restrained round tube, the fiber drawing rod is arranged in the inner restrained round tube, prestress is exerted to tension the end plates at two ends, and the connection parts are both connected on the outer sides of the two end plates.

The invention relates to a precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection and belongs to the technical field of building structures. The precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection comprises a square-rectangular concrete-filled steel tube column, a reinforced concrete beam, prestressed bars, steel plates, and steel channels. Both the square-rectangular concrete-filled steel tube column and the reinforced concrete beam are precast. The parts, corresponding to the beam section, of the square-rectangular concrete-filled steel tube column and the precast reinforced concrete beam are provided with ducts in which metal bellows are embedded. The steel plates are welded at the connection sections of the square-rectangular concrete-filled steel tube column and the reinforced concrete beam. The steel channels are welded on the square-rectangular concrete-filled steel tube column. Ordinary rebars and unbonded prestressed rebars are passed through the metal bellows, and the prestressed rebars are tensioned so that the beam and the column are integrated. The precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection has the advantages that construction speed is high, the field welding process is not required, joint connection reliability is guaranteed, seismic performance is good, and the joint has promising application prospect.

The invention belongs to the technical field of construction energy dissipation structures and relates to a self-resetting buckling-restrained brace which comprises a central positioning plate and second-stage buckling-restrained units located on the left side and the right side. Each second-stage buckling-restrained unit comprises a connecting joint, a supporting core component, an outer sleeve steel pipe, a sliding bearing plate, a fixed bearing plate, a stable steel bar, a steel frame support, a belleville spring and a friction plate. The supporting core component, the sliding bearing plateand the stable steel bar are sequentially connected and slide in the outer sleeve steel pipe. The middle part of the supporting core component penetrates through the outer sleeve steel pipe; the outer end of the supporting core component is fixedly connected with the connecting joint; the fixed bearing plate, the steel frame support and the central positioning plate are sequentially connected, and the inner end of the stable steel bar penetrates through the fixed bearing plate; the friction plate in contact with the stable steel bar is arranged between the fixed bearing plate and the centralpositioning plate; and the compressed belleville spring sleeves outside the stable steel bar. The invention further relates to an energy dissipation method of the self-resetting buckling-restrained brace. The structure is simple, the bearing capacity of a main body structure is increased, and the self-resetting capacity is achieved.

The invention provides a self-resetting beam-column anti-seismic joint based a carbon fiber disc spring. The self-resetting beam-column anti-seismic joint comprises a joint beam, a joint column, a self-resetting unit and an energy consuming unit, the joint beam and the joint column are connected through a bolt, the self-resetting unit tightly abuts against the opposite outer side of the flange ofthe joint beam, is connected with the joint column and comprises a pre-tightening connecting piece and the carbon fiber disc spring, and the pre-tightening connecting piece is arranged on the joint column in a penetrating mode. The pre-tightening connecting piece is sleeved with the carbon fiber disc spring, and then the carbon fiber disc spring is clamped between the pre-tightening connecting piece and the joint column. The energy consuming unit comprises a steel angle and a high-strength bolt, the two faces of the steel angle are attached to the flanges of the joint column and the joint beamcorrespondingly and are fastened through the high-strength bolt in a penetrating mode. When an earthquake occurs, through material yielding of the steel angle, energy consuming is conducted, the carbon fiber disc spring is utilized as the joint to provide large resisting force and restoring force, and thus the joint can still conduct self-resetting after the earthquake.