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52results about How to "Eliminate residual deformation" patented technology

Self-centering buckling-restrained brace beam-column joint

The invention relates to a joint for building structures, relates to a self-centering buckling-restrained brace beam-column joint and aims to solve the problem that structural application functions of an existing self-centering buckling-restrained brace in a diagonal placement scheme may be influenced and the problem that existing steel-frame beam-column joints are mostly connected rigidly or semi-rigidly, the joint of such structure easily suffers brittle failure, and after an earthquake, dangers still exist and continual application is unavailable even after the building does not collapse. Gaps are provided among columns and beams, a plurality of column stiffening ribs are distributed on the columns, the beam stiffening ribs are distributed on the beams, two connecting plates are disposed on upper and lower flanges of one beam; each connecting plate is L shaped and is provided with a plurality of bolt holes; a vertical segment of each connecting plate is connected with a column plug through bolts; each bolt penetrate a corresponding bolt hole so as to connect the connecting plates and the girder; a self-centering buckling-restrained supporting member is correspondingly disposed on the outer side of each connecting board.
Owner:HARBIN INST OF TECH AT WEIHAI

Fiber pre-drawing-rod type self-centering round tube buckling restrained support

InactiveCN102852245AResidual deformation is reduced or even eliminatedEliminate residual deformationShock proofingBuckling-restrained braceStructural engineering
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.
Owner:SOUTHEAST UNIV

Self-resetting steel support with pre-pressing disc spring and friction damper

The invention provides a self-resetting steel support with a pre-pressing disc spring and a friction damper. The self-resetting steel support comprises a resetting system and a friction energy consumption system, wherein the resetting system comprises a left anchoring plate and a right anchoring plate; a first high-strength bolt and a plurality of second high-strength bolts penetrate the two anchoring plates; the composite combined disc spring is arranged at the position, between the two anchoring plates, of the first high-strength bolt in a penetrating manner; the two ends of the composite combined disc spring are anchored to the left anchoring plate and the right anchoring plate correspondingly; nuts at the two ends are screwed to extrude the left anchoring plate and the right anchoring plate, and therefore pre-tightening force is applied to the composite combined disc spring; the friction energy consumption system comprises a left friction sleeve and a right friction sleeve; the left friction sleeve penetrates the right friction sleeve or the right friction sleeve penetrates the left friction sleeve to form friction, and reciprocating motion and limiting are achieved through connection of a round hole, a long hole in the penetrating direction and a third high-strength bolt; and the interiors of the left friction sleeve and the right friction sleeve which are combined are enough to contain the resetting system. The self-resetting steel support has the beneficial effects that functions can be recovered, stress is reasonable, the structure is simple, and manufacturing is convenient and fast.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

Post-tensioned prestressing self centering steel plate shear wall structure

InactiveCN103866882AEffective control of residual deformationStable and continuous elastic recoveryWallsShock proofingFloor slabEngineering structures
The invention discloses a post-tensioned prestressing self centering steel plate shear wall structure, which comprises at least one structural unit, wherein the structural unit comprises two steel framework posts, a T-shaped steel beam, a self centering connecting element and a steel plate shear wall, wherein the T-shaped steel beam is connected with the upper ends of the two steel framework posts, the self centering connecting element is positioned at the lower side of the T-shaped steel beam and is connected with the two steel framework posts, the steel plate shear wall is positioned under the self centering connecting element, the self centering connecting element comprises an inner sleeve pipe, an outer sleeve pipe, an end plate, a pre-stretching rod and a connecting head, the inner sleeve pipe is sheathed by the outer sleeve pipe, the end plate seals the end parts of the inner sleeve pipe and the outer sleeve pipe, the pre-stretching rod is arranged in the inner sleeve pipe and is anchored on the end plate, the connecting head is connected with the end part of the inner sleeve pipe, the length of the upper wing edge of the T-shaped steel beam is greater than the length a the web plate, the lower end of the web plate of the T-shaped steel beam is connected with the upper side surface of the outer sleeve pipe, and the lower side surface of the outer sleeve pipe is connected with the upper side surface of the steel plate shear wall. The post-tensioned prestressing self centering steel plate shear wall structure has the advantages that the plastic deformation of the steel plate shear wall can be effectively eliminated, the lateral deformation coordination of a framework and a floor slab can be ensured, and the restoring cost and the restoring difficulty of the engineering structures after the earthquake are greatly reduced.
Owner:SOUTHEAST UNIV

Prefabricated prestressed concrete frame joint with amplified corner multi-stage energy consumption

The invention belongs to the technical field of civil engineering fabricated structures, and discloses a prefabricated prestressed concrete frame joint with amplified corner multi-stage energy consumption. The prefabricated prestressed concrete frame joint with the amplified corner multi-stage energy consumption comprises a prefabricated reinforced concrete column, a prefabricated reinforced concrete beam, an amplified corner type joint shear damper, a fixing plate, high-strength bolts, a beam end sliding device, an energy consumption baffle, fixing screws, a prestressed steel strand reservedpore channel and an unbounded prestressed steel strand, wherein the amplified corner type joint shear damper is fixed to the column by the fixing plate and the high-strength bolts, the energy consumption baffle and the fixing screws are arranged on the beam end sliding device, and the unbounded prestressed steel strand is arranged in the prestressed steel strand reserved pore channel. According tothe prefabricated prestressed concrete frame joint with the amplified corner multi-stage energy consumption, effective energy consumption can be carried out under the action of strong / typhoon and earthquake with different strengths, the stability and energy consumption capacity of the joint under high-intensity earthquake are guaranteed, so that body member damage is reduced, post-earthquake residual deformation is eliminated, and the good self-reset function is guaranteed.
Owner:DALIAN UNIV OF TECH

Orthogonal plywood shear wall-concrete core tube mixed lateral-load-resistance system

The invention relates to an orthogonal plywood shear wall-concrete core tube mixed lateral-load-resistance system. The system includes an orthogonal plywood shear wall, a concrete core tube, replaceable energy-dissipation connectors, a concrete foundation, prestressing swing supports, a first post-tensioned unbonded prestressing bar, a second post-tensioned unbonded prestressing bar, a first steelshim and a second steel shim. The orthogonal plywood shear wall is connected with the concrete core tube through the several replaceable energy-dissipation connectors, the concrete core tube is connected with the concrete foundation through the first steel shim, the second steel shim and the several prestressing swing support, the first post-tensioned unbonded prestressing bar runs through the concrete core tube longitudinally and is fixed by an anchorage device, and the first post-tensioned unbonded prestressing bar runs through the orthogonal plywood shear wall longitudinally and is fixed by an anchorage device and the second post-tensioned unbonded prestressing bar runs through the concrete core tube longitudinally and is fixed by an anchorage device. Compared with the prior art, the system can effectively reduce the damage of orthogonal plywood wallboards and concrete shear walls in an earthquake, energy-dissipation components are easily replaced, and the difficulty and cost of post-earthquake repair can be reduced.
Owner:TONGJI UNIV

Assembly internal folding type self-reset energy dissipation bracing

The invention discloses an assembly internal folding type self-reset energy dissipation bracing which comprises an outer pipe, a linear rod and a guide rod. A hollow groove is formed in the middle of the guide rod, the linear rod is inserted into the hollow groove of the guide rod, the linear rod and the guide rod are fixedly connected through a high-strength bolt, and a friction plate is arranged between the linear rod and the guide rod. A first spring, a second spring, a third spring and a fourth spring are arranged between the adjacent check blocks on the guide rod in a sleeving mode, the guide rod is sleeved with the outer pipe, an outer pipe right end plate and an outer pipe left end plate are fixedly arranged at the two ends of the outer pipe, the left end of the linear rod penetrates out of the outer pipe left end plate, and the right end of the guide rod penetrates out of the outer pipe right end plate. A main force bearing and force transferring part of the bracing is a whole, it is avoided that due to welding, the metallographic structure and performance of steel change, and welding residual stress is generated, the stress performance is more stable, a main reset device and a friction device are clear, the structure is simple in integral construction, and machining and mounting are convenient.
Owner:BEIJING JIAOTONG UNIV

Magnetic fluid variable-damping energy dissipation bracing with reset function

The invention provides a magnetic fluid variable-damping energy dissipation bracing with a reset function. The middle portion of an inner pipe is sleeved with two permanent magnets. The two permanent magnets are sleeved with magnetism insulation rings. Pistons are fixedly arranged on the left side and the right side of the permanent magnets and the magnetism insulation rings. The pistons are sleeved with a cylinder barrel. Sealing end plates are fixedly arranged at the two ends of the cylinder barrel. The sealed space defined by the cylinder barrel, the inner pipe, the pistons and the sealing end plates is filled with magnetorheological liquid. The two ends of the inner pipe are sleeved with a left side disc spring and a right side disc spring correspondingly. The two ends of the left side disc spring and the two ends of the right side disc spring are each provided with a disc spring end plate. The inner pipe is sleeved with center holes of the disc spring end plates and center holes of the sealing end plates. Each disc spring end plate and each sealing end plate are each provided with four guide shaft holes. Guide shafts are sleeved with the guide shaft holes. By means of changes of the width of a damping channel, the pistons extrude the magnetorheological liquid to overcome the shear yielding force which is generated through solidification under the effect of a permanent magnetic field and is increased along with increase of the displacement amplitude, the component slide start force is small, and the magnetic fluid variable-damping energy dissipation bracing has good energy consumption capacity.
Owner:BEIJING JIAOTONG UNIV

Novel shock absorption self-resetting energy-consuming inhaul cable supporting device

The invention discloses a novel shock absorption self-resetting energy-consuming inhaul cable supporting device, and belongs to the technical field of shock absorption equipment. The novel shock absorption self-resetting energy-consuming inhaul cable supporting device is composed of a resetting mechanism, resetting energy-consuming mechanisms, force-limiting energy-consuming mechanisms, high-strength steel cables and bases. The resetting mechanism is arranged between the two bases, and the resetting energy-consuming mechanisms are arranged on both sides of the resetting mechanism. The force-limiting energy-consuming mechanisms are arranged on the outer sides of the resetting energy-consuming mechanisms in a connecting mode, and the high-strength steel cables are arranged on the outer sidesof the force-limiting energy-consuming mechanisms in a connecting mode. According to the novel shock absorption self-resetting energy-consuming inhaul cable supporting device, the self-resetting ability of the supporting is improved, the selection range of a pre-stressed reset bar material is widened, the increase of the supporting internal force under the action of exceeding the fortification intensity earthquake is effectively suppressed, the energy-consuming ability is improved, so that main structural elements, such as beams and columns, are strengthened, the insufficiency that an existing reset reinforcement material-fiber reinforced composite material can not bend at a pulley position is overcome, the utilization ratio of the self-reset mechanism is improved, and the economic cost is reduced.
Owner:YANGZHOU UNIV

Controllable energy consumption swing column foot

PendingCN113216387AChange damage modeChange loading mechanismProtective buildings/sheltersShock proofingSteel tubeRebar
The invention discloses a controllable energy consumption swing column foot. The controllable energy consumption swing column foot comprises a reinforced concrete column on the upper portion and a cup rim foundation on the lower portion, a steel pipe concrete conversion head is arranged between the cup rim foundation and the reinforced concrete column, and disc spring self-resetting buckling-restrained energy consumption devices are arranged at the four corners of the steel pipe concrete conversion head. According to the controllable energy consumption swing column foot, partial constraint between the column bottom and the foundation is relieved, a self-resetting device and an energy consumption device are integrated, the novel controlled swing column foot is designed, the anti-seismic performance of a concrete frame structure is improved, passive control over the structure under the earthquake action is achieved, the purpose that the function of the structure can be recovered is achieved, and rapid development of the concrete frame-swing column structure is promoted.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

Self-resetting energy consumption inhaul cable support

ActiveCN105421608AReduced elastic elongation requirementsBroaden your optionsShock proofingWork performanceEngineering
The invention discloses a self-resetting energy consumption inhaul cable support which comprises a pulley, a pulley base, a prestress reset rib, an anchorage device, a limiting plate, a sliding frame, a bottom plate, a high-strength steel cable, a friction plate, a steel base plate and a connecting plate. The pulley is fixed to the pulley base. The pulley base is fixed to a main structure through a bolt. One end of the prestress reset rib is anchored to the limiting plate through the anchorage device. The other end of the prestress reset rib winds around the pulley, and builds prestress through a post-tensioning method to be connected with the sliding frame. The self-resetting energy consumption inhaul cable support has the advantages that the resetting capability of the support is enhanced exponentially, or the selection range of the reset rib material is widened exponentially, the structure complexity degree of the support is simplified, and the working performance of the support is ensured; 2, the cross section of the support is reduced, and therefore the earthquake effect is effectively reduced; 3, the yield stiffness designability is provided for the support.
Owner:NANJING UNIV OF TECH

Self-resetting SMA-viscous vibration reduction damper

The invention discloses a self-resetting SMA-viscous vibration reduction damper. The damper comprises a head connecting lug ring, a piston rod, a head sealing cover, a piston, a viscous damping medium, a cylinder body outer wall, a middle sealing cover, a spring pressing plate, an SMA spring, a guide hollow rod, a tail sealing cover and a tail connecting lug ring. The self-resetting SMA-viscous vibration reduction damper provided in the invention has advantages and positive effects that 1, most of input vibration energy can be dissipated; 2, the SMA spring can dissipate low-frequency or ultrahigh-frequency vibration energy, and meanwhile, the piston can be recovered to an original position to eliminate residual deformation; 3, the rigidity of the damper can be adjusted by adjusting pre-pressure of the pre-pressing spring as required; and 4, mounting and dismounting are simple and maintenance is easy.
Owner:CIVIL AVIATION UNIV OF CHINA

Restoring method of bent and raised veneer

The invention relates to the technical field of wood processing, in particular to a restoring method of a bent and raised veneer. The restoring method comprises the steps of heating, steaming and drying. Compared with the prior art, the restoring method adopts a process, which integrates restoration and straightening with secondary drying, to restore and dry the bent and raised veneer. A high-temperature and high-humidity method is adopted for eliminating the residual deformation inside the width-deformed veneer and drying the veneer which restores the straightness in the conditions of constant temperature and constant humidity. The restoring method has the advantages of short production period, simple process, low production cost, no wood color deepening, no waste water discharge, no environment pollution, strong practicality, and the like.
Owner:ZHEJIANG SHIYOU TIMBER

Memory alloy self-restoring heat dissipation damper

The invention discloses a memory alloy self-restoring heat dissipation damper. A first inner pulling and pressing board and an outer pulling and pressing board capable of sliding relatively are arranged. A self-restoring structure is formed by a vertical blocking board and a limiting blocking board set so as to convert relative motion of the inner pulling and pressing board and the outer pulling and pressing board to a pulled state of memory alloy rods. Damping cushion is realized by utilizing material performance of the memory alloy rods. When the stress is too large, friction layers betweenthe inner pulling and pressing board and the outer pulling and pressing board act in common so as to dissipate energy input of the structure, and dissipation of great energy is realized through friction deformation, and absorption of dissipated energy by stressed parts in a building structure in an earthquake is reduced, so that an effect of protecting the building structure is realized. The memory alloy rods in the damper can enable the damper after an earthquake to restore to an initial state, so that residual deformation of a building is reduced and even eliminated after the earthquake. Theinvention can provide comparatively large damping force and utilizes the memory alloy rods and the friction layers to dissipate energy in a graded manner. The cost of the damper is reduced and structural energy dissipation requirements of different phases are met.
Owner:CHANGAN UNIV

Energy-dissipating damping device suitable for mortise-tenon joints of timber structures of ancient buildings

An energy-dissipating damping device suitable for the mortise-tenon joints of the timber structures of ancient buildings comprises connecting parts II and a connecting part III, wherein the upper endsof the connecting parts II are connected with connecting parts I through bolts I to form closed structures fixed around a wooden beam; two ends of the connecting part III are connected through a boltII to form a closed structure fixed around a wooden pillar; the connecting part III is mounted on a steel support frame with a horizontal steel plate; the lower ends of the connecting parts II are connected to the upper surface of a rectangular steel tube; a viscous friction damper is arranged between the upper surface of the steel support frame and the lower surface of the rectangular steel tube; and metal energy-dissipating rods run from the lower surface of the rectangular steel tube to the horizontal steel plate of the steel support frame through the viscous friction damper. Under the action of earthquake, relative sliding occurs between all layers of the viscous friction damper to drive the metal energy-dissipating rods to bend to dissipate energy together. The energy-dissipating damping device has the advantages of strong energy-dissipating capacity and resistant-lateral rigidity, simple structure, convenient mounting, easy replacement and so on.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

Rolling isolation bearing

The invention discloses a rolling isolation bearing. The rolling isolation bearing comprises a rolling plate and a bottom box, and the bottom box is provided with an open top. Grooves parallel to theY axis are formed in two opposite sides of the bottom of the bottom box, and the grooves are separately provided with preloaded spring sets. A boss is arranged between the grooves, a plurality of horizontal rollers parallel to each other are arranged on the upper surface of the boss, and the axes of the horizontal rollers are parallel to the X axis. The rolling plate is mounted on the bottom box,and the bottom surface of the rolling plate is in contact with the horizontal rollers. When the rolling isolation bearing is subjected to the lateral load force, the rolling plate is in contact with the horizontal rollers, the damage of the lateral load force to the upper structure of a building is dispersed by the slip generated between the rolling plate and the bottom box. When the bottom box isdeformed by the lateral load force, the preloaded spring sets can provide elastic force to overcome the deformation, so the rolling isolation bearing is not prone to generating residual deformation after being subjected to the lateral load force, and the preloaded spring sets can drive the rolling plate to reset.
Owner:FOSHAN UNIVERSITY

Beam hinge fabricated self-resetting friction connecting node structure and connecting method

The invention discloses a beam hinge fabricated self-resetting friction connecting node structure and a connecting method. First connecting pieces are pre-embedded in a precast column, second connecting pieces are pre-embedded in a precast beam, the two sides of the precast column are fixedly connected with the second connecting pieces on the precast beam through the first connecting piece correspondingly so as to form a friction energy dissipation device; the second connecting pieces on the two sides of the precast column are then fixedly connected through memory alloy rods; when a sudden load is applied to precast beam nodes, the friction energy dissipation device composed of the first connecting pieces and the second connecting pieces on the two sides of the precast column consumes a large amount of energy due to relative sliding friction, and after unloading, the memory alloy rods drives the friction energy dissipation device composed of the first connecting pieces and the second connecting pieces on the two sides of the precast column to return to the original state without residual deformation. Connecting fittings of the nodes are simple to manufacture and convenient to factory type quantitative production, the construction is convenient, the connection of the beam and the column in the prefabricated assembly building can be quickly completed, the construction period is shortened, the time cost is reduced, and the engineering cost is saved.
Owner:CHANGAN UNIV

Micro-prestress self-resetting wall provided with self-resetting variable friction dampers and construction method thereof

The invention discloses a micro-prestress self-resetting wall provided with self-resetting variable friction dampers and a construction method thereof. The micro-prestress self-resetting wall comprises a foundation beam, a plurality of horizontal wall bodies arranged on the foundation beam and prestressed tendons penetrating through the horizontal wall bodies and the foundation beam and connectingthe horizontal wall bodies with the foundation beam, and variable friction dampers are arranged among the plurality of horizontal wall bodies and between the horizontal wall bodies and the foundationbeam for connection and fixation. The construction method comprises the steps that during construction, prestressed tendon channels are reserved on the foundation beam, middle friction plates are arranged on the foundation beam, inner friction plates or middle friction plates are arranged on the corresponding plurality of horizontal wall bodies, the plurality of horizontal wall bodies are connected and fixed, the horizontal wall bodies and the foundation beam are connected and fixed, and micro-tensioning is performed after the prestressed tendons are arranged. According to the self-resettingwall, under the action of an earthquake, the variable friction dampers arranged among the wall bodies and between the wall bodies and the foundation beam can consume a large amount of earthquake motion input energy through friction, self-resetting of the variable friction dampers can be achieved, and self-resetting force can be further provided to eliminate residual deformation of the wall bodiesin combination with arrangement of the prestressed tendons.
Owner:SOUTHEAST UNIV

Intercolumnar connecting structure capable of recovering function

PendingCN111173134AInhibition of deformation and expansionAvoid residual deformationProtective buildings/sheltersBuilding reinforcementsWire rodResidual deformation
The invention relates to the technical field of buildings, provides an intercolumnar connecting structure capable of recovering the function, and aims to solve the problem in the prior art that a steel structure column body has residual deformation. The intercolumnar connecting structure comprises a first connecting part, a second connecting part, an energy consuming component, an anchoring plateand a prestressing force wire rod; the first connecting part and the second connecting part are arranged at the end part of a column body to connect upper and lower columns; the prestressing force wire rod is connected with the upper and lower columns through the anchoring plate and is used for pulling the upper and lower columns after an earthquake to enable the upper and lower columns to realizeself-reset; the energy consuming component is arranged between the first connecting part and the second connecting part to consume energy; and when the energy consuming component is damaged, the damaged energy consuming component can be detached to change a new energy consuming component. The intercolumnar connecting structure meets the aseismic design requirement, has the self-reset capacity toresist residual deformation, and can eliminate residual deformation of the energy consuming component through changing the energy consuming component generally to solve the problem in the prior art about residual deformation of the steel structure column body.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

Restoring method of bent and raised veneer

The invention relates to the technical field of wood processing, in particular to a restoring method of a bent and raised veneer. The restoring method comprises the steps of heating, steaming and drying. Compared with the prior art, the restoring method adopts a process, which integrates restoration and straightening with secondary drying, to restore and dry the bent and raised veneer. A high-temperature and high-humidity method is adopted for eliminating the residual deformation inside the width-deformed veneer and drying the veneer which restores the straightness in the conditions of constant temperature and constant humidity. The restoring method has the advantages of short production period, simple process, low production cost, no wood color deepening, no waste water discharge, no environment pollution, strong practicality, and the like.
Owner:ZHEJIANG SHIYOU TIMBER

Self-returning lead extruding damper

InactiveCN104746768AWide application of shock absorptionWide application of limit controlShock proofingEngineeringEnergy consumption
The invention provides a self-returning lead extruding damper. The self-returning lead extruding damper is formed by sequentially hinging for groups of damping units having the same structure through connecting hinge pins; each damping unit comprises an upper laminate, a medium laminate and a bottom laminate which are sequentially connected and arranged through hinge pins; an upper laminate body, a medium laminate body and a bottom laminate body are all of circular structures; a connecting hinge is integrally formed at the side edge of each circular structure; the upper laminate and the bottom laminate have the same structure that is a disc-shaped structure provided with a central through hole in each circular structure; the circular structure of the medium laminate is a ring shaped structure; a limiting bulge which is convex to the center of circle is arranged on the inner wall of the ring of the ring shaped structure of the medium laminate; a star shaped drawing part structure is arranged in the ring of the ring shaped structure of the medium laminate and between the upper laminate and the bottom laminate; an arc-shaped extruding lead block which his concentric with a central hole is arranged between two adjacent drawing plates of the star-shaped drawing part structure; a disc shaped spring is arranged between two sides of each drawing plate and the adjacent limiting bulge. The self-returning lead extruding damper can be widely applied to energy consumption damping and limiting control of a building.
Owner:TIANJIN UNIV RENAI COLLEGE

Correction method of residual deformation of thin flat-plate aluminium alloy casting

The invention relates to a correction method of residual deformation of a thin flat-plate aluminium alloy casting. In order to overcome the defect of residual deformation of the thin flat-plate aluminium alloy casting, correction is performed with a correction fixture and far-infrared tunnel furnace combined method, the thin flat-plate aluminium alloy casting is mounted in a correction fixture, placed in a far-infrared tunnel furnace and subjected to preheating, constant-temperature treatment and cooling aging treatment, residual deformation of the thin flat-plate aluminium alloy casting is corrected, residual stress is eliminated, and the stability and the reliability of the shape of the thin flat-plate aluminium alloy casting are effectively improved; the planeness error of the thin flat-plate aluminium alloy casting after correction is equal to or smaller than 0.1 mm, residual deformation of the thin flat-plate aluminium alloy casting is effectively eliminated, the technology of the correction method is advanced, data is accurate and detailed, the correction fixture is advanced and reliable, the structure is compact, the accuracy is high, and the correction method of residual deformation of the thin flat-plate aluminium alloy casting is very advanced.
Owner:SHANXI SHENZHOU AEROSPACE SCI & TECH CO LTD

Correcting method for residual deformation of magnesium alloy thin flat plate casting

The invention relates to a correcting method for residual deformation of a magnesium alloy thin flat plate casting. To overcome the defect of residual deformation of the magnesium alloy thin flat plate casting, correction is carried out through a method of combination of a correction clamp and an infrared tunnel kiln, the magnesium alloy thin flat plate casting is installed in the correction clamp and placed in the infrared tunnel kiln, preheat, constant-temperature treatment and cooling aging treatment are carried out, the residual deformation of the magnesium alloy thin flat plate casting is corrected, residual stress is eliminated, and stability and reliability of the shape of the magnesium alloy thin flat plate casting are effectively improved. After correction, the planeness error of the magnesium alloy thin flat plate casting is smaller than or equal to 0.05 mm, and the residual deformation of the magnesium alloy thin flat plate casting is effectively eliminated. The correcting method is advanced in technology, data are accurate and full, the correction clamp is advanced and reliable, the structure is compact, precision is high, and the correcting method is a very advanced correcting method for residual deformation of the magnesium alloy thin flat plate casting.
Owner:KANG MEI TECH DEV

Self-resetting energy-consuming cable support

ActiveCN105421608BResolve Residual DistortionResidual deformation realizationShock proofingWork performanceEngineering
The invention discloses a self-resetting energy consumption inhaul cable support which comprises a pulley, a pulley base, a prestress reset rib, an anchorage device, a limiting plate, a sliding frame, a bottom plate, a high-strength steel cable, a friction plate, a steel base plate and a connecting plate. The pulley is fixed to the pulley base. The pulley base is fixed to a main structure through a bolt. One end of the prestress reset rib is anchored to the limiting plate through the anchorage device. The other end of the prestress reset rib winds around the pulley, and builds prestress through a post-tensioning method to be connected with the sliding frame. The self-resetting energy consumption inhaul cable support has the advantages that the resetting capability of the support is enhanced exponentially, or the selection range of the reset rib material is widened exponentially, the structure complexity degree of the support is simplified, and the working performance of the support is ensured; 2, the cross section of the support is reduced, and therefore the earthquake effect is effectively reduced; 3, the yield stiffness designability is provided for the support.
Owner:NANJING TECH UNIV

An assembled inner-folding self-resetting energy-dissipating support

The invention discloses an assembly internal folding type self-reset energy dissipation bracing which comprises an outer pipe, a linear rod and a guide rod. A hollow groove is formed in the middle of the guide rod, the linear rod is inserted into the hollow groove of the guide rod, the linear rod and the guide rod are fixedly connected through a high-strength bolt, and a friction plate is arranged between the linear rod and the guide rod. A first spring, a second spring, a third spring and a fourth spring are arranged between the adjacent check blocks on the guide rod in a sleeving mode, the guide rod is sleeved with the outer pipe, an outer pipe right end plate and an outer pipe left end plate are fixedly arranged at the two ends of the outer pipe, the left end of the linear rod penetrates out of the outer pipe left end plate, and the right end of the guide rod penetrates out of the outer pipe right end plate. A main force bearing and force transferring part of the bracing is a whole, it is avoided that due to welding, the metallographic structure and performance of steel change, and welding residual stress is generated, the stress performance is more stable, a main reset device and a friction device are clear, the structure is simple in integral construction, and machining and mounting are convenient.
Owner:BEIJING JIAOTONG UNIV

A Correction Method for Residual Deformation of Aluminum Alloy Thin Flat Castings

The invention relates to a correction method of residual deformation of a thin flat-plate aluminium alloy casting. In order to overcome the defect of residual deformation of the thin flat-plate aluminium alloy casting, correction is performed with a correction fixture and far-infrared tunnel furnace combined method, the thin flat-plate aluminium alloy casting is mounted in a correction fixture, placed in a far-infrared tunnel furnace and subjected to preheating, constant-temperature treatment and cooling aging treatment, residual deformation of the thin flat-plate aluminium alloy casting is corrected, residual stress is eliminated, and the stability and the reliability of the shape of the thin flat-plate aluminium alloy casting are effectively improved; the planeness error of the thin flat-plate aluminium alloy casting after correction is equal to or smaller than 0.1 mm, residual deformation of the thin flat-plate aluminium alloy casting is effectively eliminated, the technology of the correction method is advanced, data is accurate and detailed, the correction fixture is advanced and reliable, the structure is compact, the accuracy is high, and the correction method of residual deformation of the thin flat-plate aluminium alloy casting is very advanced.
Owner:SHANXI SHENZHOU AEROSPACE SCI & TECH CO LTD

Actuator part inner bore combined seal ring component shaping method

The invention belongs to assembly technology, and relates to improvement on an actuator part inner bore combined seal ring component shaping method. The method comprises a mechanical shaping step, and is characterized in that: a dividing bushing component or a main piston component is subjected to heat treatment, heated in an oven to 70+ / -5 DEG C, kept at the temperature of 70+ / -5 DEG C for 1 to 2 hours, taken out, and naturally cooled to room temperature. The method has the advantages of eliminating residual deformation of the mechanically shaped fluoroplastic seal ring, and improving the survival rate of product assembly.
Owner:FLIGHT AUTOMATIC CONTROL RES INST

A self-resetting multi-dimensional shock-absorbing pipe pile group foundation and construction method

ActiveCN106351217BRealize the effect of multi-dimensional shock absorptionMitigate vertical seismic actionBulkheads/pilesHigh strength concreteReciprocating motion
The invention discloses a self-resetting multidimensional damping pipe pile group foundation and a construction method, and belongs to the technical field of building seismic resistance. The foundation comprises a bearing platform, a PHC (prestressed high strength concrete) pipe pile, damping supports and a damping ground anchor, wherein the damping supports are connected between peripheral foundation piles and the bearing platform, and each damping support comprises an upper seal plate, a lower seal plate, a soft steel core rubber pad, radial reset springs, an outer sleeve and an inner sleeve and extends into a groove in the bottom of the bearing platform, and the bottom of each damping support is arranged at the top of the corresponding pile through the corresponding inner sleeve in a sleeving manner for fixing; the damping ground anchor below a central pipe pile comprises a shearing damper and anchor rods, the shearing damper comprises vertical reset springs, soft steel clamps and steel clamping grooves, the ground anchor is used for penetrating into the soil layer at a pile end of the central pipe pile, and the upper end of the ground anchor is anchored on the top surface of the bearing platform through a steel pulling cable. By means of the foundation and the construction method, vibration energy during reciprocating motion of seism is effectively absorbed, the multidimensional damping effect of the pile group foundation is realized, pile-bearing platform joints with ductile energy consumption capacity are formed, and the problem that pipe pile heads are prone to seismic damage under the action of strong seism is solved.
Owner:TAIYUAN UNIV OF TECH

Self-reset oil damper

The invention discloses a self-reset oil damper. The self-reset oil damper is of an annular limiting structure formed by sequentially hinging four groups of damping units which are the same in structure by using connecting pin shafts, wherein each damping unit comprises an upper layer plate, a middle layer plate and a base layer plate which are sequentially arranged in a connected manner from top to bottom by pin shafts; the main body of each upper layer plate and each bottom layer plate is of a circular structure; a connecting handle is integrally formed on a side of the circular structure; each middle layer plate is of a frame structure of a hydraulic mechanism driven by a piston rod; one end of each piston rod extends out of the middle layer plate along the radial direction of the middle layer plate which is of a frame structure and is hinged with each upper layer plate and each base layer plate. The self-reset oil damper disclosed by the invention can have displacement in a two-dimensional space, has a certain initial rigidity and can resist wind load and small shock; when the self-reset oil damper is beyond design intensity, an energy consuming element gets into a working state to dissipate earthquake energy; after the earthquake is ended, pressure or tensile force generated by a spiral spring forces the piston rod to return to the initial position, so that residual deformation is eliminated and a resetting function is realized. The self-reset oil damper can be widely applied to energy-consumption shock absorption and position limitation control of buildings.
Owner:TIANJIN UNIV RENAI COLLEGE
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