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507 results about "Buckling-restrained brace" patented technology
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A buckling-restrained brace (BRB) is a structural brace in a building, designed to allow the building to withstand cyclical lateral loadings, typically earthquake-induced loading. It consists of a slender steel core, a concrete casing designed to continuously support the core and prevent buckling under axial compression, and an interface region that prevents undesired interactions between the two. Braced frames that use BRBs – known as buckling-restrained braced frames, or BRBFs – have significant advantages over typical braced frames.
Buckling control support with diamond type energy dissipation units at ends
ActiveCN105888348AImprove protectionQuality assuranceProtective buildings/sheltersShock proofingManufacturing technologyBuckling-restrained brace
The invention discloses a buckling control support with diamond type energy dissipation units at the ends. The buckling control support is characterized by being composed of end restraint sections, energy dissipation sections and a straight supporting section, wherein the two ends of the buckling control support are connected with beam and column members or joints into a whole through high-strength bolts to achieve the purpose of improving the lateral stiffness of the members. The buckling control support with the diamond type energy dissipation units at the ends maintains resilience under the action of a small earthquake and enters a yield stage under the action of a medium earthquake or a major earthquake, and the effect of a damper can be achieved due to the good hystersis energy dissipation performance of the buckling control support. Compared with a traditional buckling control support, the procedures of adding a sleeve outside a core energy dissipation member, performing grouting and the like in the traditional manufacturing process are omitted in the manufacturing technology, and manufacturing is convenient; the support can be prefabricated in a factory, the member quality is guaranteed, the workload of site construction operation is reduced, and energy conservation and environment protection are achieved.
Owner:SOUTHEAST UNIV
Energy dissipation type buckling constraint support with symmetrical initial imperfection unit at end
ActiveCN105971356AOptimize layoutFlexible layoutProtective buildings/sheltersShock proofingManufacturing technologyBuckling-restrained brace
The invention discloses an energy dissipation type buckling constraint support with a symmetrical initial imperfection unit at the end. The energy dissipation type buckling constraint support is characterized in that the support is composed of an end constraint segment, an energy dissipation segment and a support straight segment; and the two ends are connected with beams or column components or nodes to form a whole through bolt connection so as to achieve the purpose of improving of the resistant-lateral rigidity of components. The energy dissipation type buckling constraint support with the symmetrical initial imperfection unit at the end is adopted, and thus under the action of a small earthquake, the buckling constraint support keeps elasticity; and under the action of a medium earthquake or a severe earthquake, the buckling constraint support enters a yield stage, and the effect of a damper can further be achieved through the good hysteretic energy dissipation performance of the buckling constraint support. Compared with traditional buckling constraint supports, according to a manufacturing technology of the energy dissipation type buckling constraint support, the processes of adding a sleeve outside a core energy dissipation component, grouting and the like in the traditional manufacturing process are avoided in the manufacturing technology, so that manufacturing is convenient. The energy dissipation type buckling constraint support can be prefabricated and formed in a factory, the quality of the components is ensured, the workload of site operation is reduced, and energy conservation and environment protection are achieved.
Owner:SOUTHEAST UNIV
Buckling control support with bidirectional pyramid-shaped energy dissipation units at ends
ActiveCN106049952AImprove protectionPrevent bucklingProtective buildings/sheltersShock proofingNODALBuckling-restrained brace
The invention discloses a buckling control support with bidirectional pyramid-shaped energy dissipation units at the ends. The buckling control support with the bidirectional pyramid-shaped energy dissipation units at the ends is characterized in that the buckling control support is composed of end restraint sections, energy dissipation sections and a straight supporting section, and the two ends are connected with beam or column components or joints into a whole through bolts, so that the purpose of increasing the resistant-lateral rigidity of a component is achieved. By the adoption of the buckling control support with the bidirectional pyramid-shaped energy dissipation units at the ends, under the small shock action, the buckling control support is kept elastic; and under the medium or great shock action, the buckling control support is switched to a buckling stage, and a damper effect can be achieved through the good hysteretic energy dissipation performance of the buckling control support. Compared with a traditional buckling restraint support, the steps of additional arrangement of a sleeve outside a core energy dissipation component, grouting and the like in a traditional manufacturing process are omitted on the aspect of the manufacturing technique, and manufacturing is convenient; and the support can be prefabricated in a factory, the quality of the component is guaranteed, the filed construction workload is reduced, energy is saved, and environmental friendliness is achieved.
Owner:SOUTHEAST UNIV
Buckling restrained braced frame
InactiveUS20050257490A1Stable and predictable hystereticEasy to manufactureHuman health protectionLoad-supporting elementsBraced frameBuckling-restrained brace
A buckling restrained braced frame for use in light-framed constructions which includes a ductile load bearing core surrounded by a lightweight casing which resists buckling of the core under compressive loads.
Owner:SIMPSON STRONG TIE
Buckling restrained brace for structural reinforcement and seismic energy dissipation and method of producing same
InactiveUS20080229683A1Improve performanceEnhance resilienceMetal-working apparatusProtective buildings/sheltersMetal foilBuckling-restrained brace
A buckling restrained brace includes a deformable core contained within an outer casing. Ends of the core protrude from the casing for connection to a frame or other structure. A length of the deformable core between its ends, referred to as the gauge or yielding section, is capable of deforming during an earthquake or blast loading. The gauge section is differentially heat treated from the ends so that the gauge section has a lower yield strength than the ends. The casing provides containment of the core to prevent buckling of the core. A metal foil interface or unbonding layer is provided between the deformable core and the casing so that the deformable core does not bind to the casing. The buckling restrained brace provides significant performance improvements over prior art BRBs coupled with simplified assembly.
Owner:KAZAK COMPOSITES
Double-layer bushing straight-line flexuosity restriction support with transverse diaphragm
InactiveCN101105053ASolve the problem of limited lateral expansionEliminates the problem of limited lateral expansionShock proofingCompressible materialCruciform
Owner:CHINA ACAD OF BUILDING RES +2
Prestressed concrete constraining buckling-restrained brace
InactiveCN102817422AGive full play to the constraintsReduce section sizeShock proofingBuckling-restrained braceUltimate tensile strength
The invention discloses a prestressed concrete constraining buckling-restrained brace. The brace comprises a cross inner core member, concrete-filled square steel tube constraining members, a hard rubber plate, long bolt shank positioning parts and prestressed tendons, wherein four concrete-filled square steel tube constraining members are made of prestressed thin-wall steel tube concrete and attached to the cross inner core member closely to form a stressed whole; the cross inner core member is made of two pieces of low-intensity high-stretchability hot rolled section steel with a T-shaped cross section, and an inner surface and an outer surface are attached to the hard rubber plate; and a circular hole is arranged in the middle of the buckling-restrained brace, and the long bolt shank positioning parts penetrate through the circular hole and connect the cross inner core member, concrete-filled square steel tube constraining members and the hard rubber plate. The prestressed concrete constraining buckling-restrained brace has the advantages that the constraining effects of concrete can be implemented fully, the cross section size of the member is reduced, high efficiency and economy are achieved.
Owner:TSINGHUA UNIV
Dual-core self-centering buckling-restrained brace
Owner:NAT APPLIED RES LAB
Buckling-restrained brace
ActiveUS20130152490A1Reduce frictionImprove performanceMetal-working apparatusTowersCardboardNuclear engineering
Disclosed is a buckling restrained brace which is a core plate inside a tube, with the plate prevented from buckling by being surrounded by the tube. The core plate is provided with a layer of discrete springs adjacent the core plate, with the interior of the tube otherwise filled with cement. The layer of discrete springs may be cardboard of other material. The layer of discrete springs defines a space between the core plate and the concrete, to allow for expansion of the core plate under compression from the ends.
Owner:SEISMIC BRACING CO LLC
Sleeved bracing useful in the construction of earthquake resistant structures
InactiveUS7188452B2Improve securityPrevent bucklingLiquid resistance brakesLiquid based dampersBuckling-restrained braceEarthquake resistant structures
A buckling restrained brace includes an elongate, hollow sleeve, an elongate yielding core extending substantially through the length of the sleeve, and a buckling constraining element between the yielding core and the inner surface of the hollow sleeve and spaced apart from at least one surface of the yielding core, leaving a gap therebetween. The buckling constraining element may be spaced apart from and, thus, the gap may exist between two or more surfaces of the yielding core. Additionally, an inner sleeve, or liner, may be positioned between the buckling constraining element and the yielding core, with the liner being spaced apart from at least one surface of the yielding core. The buckling restrained brace is useful in absorbing loads, such as seismically induced loads, that are exerted upon a steel frame.
Owner:COREBRACE LLC
Vertical reinforced concrete component-connection node of buckling-restrained brace
ActiveCN101672071ASimple connection structureSimplify spatial relationshipsBuilding constructionsPunchingBuckling-restrained brace
The invention belongs to the technical field of node connection of architectural structure, in particular to a vertical reinforced concrete component, that is, a connection node of a buckling-restrained brace (BRB), which consists of steel plates, internal-thread steel bars for embedded parts, internal stirrups for concrete beams, internal longitudinal bars for concrete beams, support connection node plates, support node stiffening plates, buckling-restrained supports, internal stirrups for concrete columns and internal longitudinal bars for concrete columns, wherein, two steel plates are connected by the internal-thread steel bars for embedded parts; plug welding holes are formed on the steel plates; steel bars are welded with a first steel plate and a second steel plate at the plug welding holes; a first support connection node plate is located at the upper part of the first steel plate or at the lower part of the second steel plate; a second support connection node plate is connected with the first support connection node plate; one end of the second support connection node plate is fixed at the upper part of the first steel plate or the lower part of the second steel plate, andthe other end thereof is connected with the buckling-restrained brace; and the support node stiffening plates are fixed at one side of the first support connection node plate. The invention solves the problems that steel support connection nodes are difficult to be mounted in a concrete frame, structural steel needs punching when being embedded in a concrete component, and stirrups and longitudinal bars are arranged with difficulties; and the invention has the advantages that the construction is convenient, the stress performance of connection is good, and steel materials can be saved, therefore, the invention has wide application prospect.
Owner:TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
All-steel self-restoring buckling-restrained brace based on disc spring
ActiveCN106567324AImprove shock absorptionImprove energy consumptionBridge structural detailsProtective buildings/sheltersSteel platesBuckling-restrained brace
The invention discloses an all-steel self-restoring buckling-restrained brace based on a disc spring, and belongs to the technical field of disaster prevention and shock absorption for civil engineering. The all-steel self-restoring buckling-restrained brace is mainly composed of an in-line steel plate inner core, a stiffening rib, a non-bonding material, an inner sleeve, an outer sleeve, the combined disc spring, a stop block, a stop plate, a left connection plate and a right connection plate. The brace is composed of a buckling-restrained part and a self-restoring part, the buckling-restrained part is composed of the in-line steel plate inner core, the stiffening rib, the non-bonding material, the inner sleeve, the left connection plate and the right connection plate, and the self-restoring part is composed of the inner sleeve, the disc spring, the stop block, the stop plate and the outer sleeve. The buckling-restrained brace disclosed by the invention is capable of effectively solving the problems of the increased post-earthquake maintenance and reconstruction cost due to the excessive residual deformation of the buckling-restrained brace under the action of a major earthquake or a medium earthquake, and high cost, low ultimate elastic deformation capacity and the like of a self-restoring material in an existing self-restoring energy dissipating brace. The all-steel self-restoring buckling-restrained brace based on the disc spring is simple in structure, clear in working mechanism, economic and applicable, and stable in performance.
Owner:BEIJING UNIV OF TECH
Buckling restrained brace
InactiveUS20130139452A1Easy to checkTowersProtective buildings/sheltersBuckling-restrained braceEngineering
A buckling restrained brace includes an axial member, a plurality of restraining members, and a plurality of securing units. The axial member includes a middle section extending in an axial direction, and two coupling sections extending respectively from opposite ends of the middle section and coupled fixedly to two connecting plates of a framework of a building. The restraining members extend in the axial direction and are disposed around and contact the axial member. Each securing unit secures an adjacent pair of the restraining members together. Each restraining member cooperates with an adjacent one of the restraining members to define an opening therebetween through which a portion of the axial member is exposed for viewing.
Owner:NAT APPLIED RES LAB
Bracing steel sleeve flection restriction support component
ActiveCN101220616AImprove featuresImprove energy consumptionShock proofingEarthquake resistanceBuckling-restrained brace
The invention relates to an improved flection-restraining support member which includes: a core part, an inner sleeve part, an outer sleeve; wherein, the core part consists of a core board and a ribbed stiffener for the core board; the inner sleeve part consists of an inner sleeve wallboard, an inner sleeve ribbed stiffener and a core board restraining board, the outermost layer is the outer sleeve; no clearance is left between the core board restraining board and the core board. The invention also provides a method for manufacturing the improved flection-restraining support member. The flection-restraining support has good returning-delaying characteristics and energy-consuming performance and is an effective energy-consuming member, which can reach 1 / 70 deformation amount, meet the 1 / 50 floor displacement distortion requirement of building under rarely-happen earthquake and can greatly improve the earthquake resistance of the building structure; furthermore, the material and manufacture are all realized in China, which greatly reduces the cost of the support and lays a foundation for generalization and application.
Owner:TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
Buckling-Restrained Brace Assembly
ActiveUS20140059950A1Reduce frictionPromote sportsProtective buildings/sheltersWelding apparatusBraced frameBuckling-restrained brace
The disclosed subject matter is directed to a building structural bracing apparatus having an inner core element sandwiched between an upper and a lower containment web. The brace frame being useful in the construction of earthquake and blast resistant structures where energy dissipation is desired.
Owner:BLUESCOPE BUILDINGS NORTH AMERICA
Buckling-restrained brace member consisting of four bound angle steels
The invention discloses a buckling-restrained brace member consisting of four bound angle steels, which consists of a cross core member and a peripheral restrain member, wherein the cross core member is formed by welding three flat steel plates, and hard rubber is glued on the surface of the cross core member; the peripheral restrain member consists of four bound angle steels; the binding function is realized by connecting branch end parts of the angle steels through a high-strength bolt; and the high-strength bolt passes through bolt holes on the branch end parts of the angle steels, steel base plates arranged between the steel angels and a plurality of rubber gaskets to connect the four steel angels into a whole. The thickness of the steel base plates is greater than that of the plates of the cross core member, and a clearance of 1 to 2mm is kept between the surface of the angel steels and the surface of the cross core member under the pretightening force of the high-strength bolt by adjusting the thickness of the rubber gaskets, and is filled with the hard rubber glued on the surface of the cross core member so as to meet the requirement of expansion of the stressed cross core member.
Owner:TSINGHUA UNIV
Double-layer bushing crisscross flexuosity restriction support with transverse diaphragm
InactiveCN101105054ASolve the problem of limited lateral expansionPossibility to avoid low-order bucklingShock proofingCruciformCompressible material
A cruciform buckling restrained brace with transverse partition double-layered bushing is provided. The core steel brace has a cruciform cross section, and comprises a middle segment (buckling segment) as major body with a smaller width, two distal end segments (extension segments), a transition segment between the buckling segment and the extension segment, and a transverse partition arranged in the middle of the buckling segment. Outer restraining steel bushings are positioned respectively at two sides of the transverse partition. An inner steel bushing is arranged between the outer restraining steel bushing and the core steel brace and has a cruciform cross section. The space between the inner steel bushing and outer restraining steel bushing is packed with fillers. An anti-adhesion material is coated tightly on the surface of the buckling segment and transition segment of the core steel brace, with a gap between the anti-adhesion material and the inner steel bushing and filled with a compressible material. The invention has the advantages of simple structure, low fabrication cost, suitability for streamline production, and wide application in high-rise buildings, towering buildings, and highway and railway bridges. The invention helps to increase the structural rigidity, improve the capacity of energy dissipation of the whole structure, and prevent earthquake disaster.
Owner:CHINA ACAD OF BUILDING RES +2
Buckling restrained brace with energy dissipation device sandwiched with lead layer and provided with steel plates at two ends and method for manufacturing buckling restrained brace
InactiveCN102605873AIncrease stiffnessImprove energy consumptionBuilding material handlingShock proofingBuckling-restrained braceFilling materials
Owner:BEIJING UNIV OF TECH
Once variable cross-section cross buckling-restrained bracing member
The invention discloses a cross-shaped buckling constraint support component with a primary variable cross-section. The support component comprises a core material part, a support end node and a sleeve part, wherein, the core material part is formed by welded core plates, the support end node part consists of gusset plates which are directly welded with the core plates, and the sleeve part consists of a square or quadrate steel sleeve and an internal filling material; a delaminating material is arranged between the internal filling material of the steel sleeve and the core plates. The invention also discloses a manufacturing method of the improved buckling constraint support component. The buckling constraint support has very good hysteresis characteristic and energy dissipation performance, is a very effective energy dissipation component, can achieve 1 / 80 deformation to satisfy 1 / 50 floor displacement deformation requirement of an architecture under an infrequent earthquake action and accumulates plastic deformation greater than 200 times of yielding displacement; the buckling constraint support has stable hysteresis characteristic and good low-cycle fatigue characteristic, can greatly improve seismic capability of the architecture, greatly reduce cost of the support and lay a foundation for popularization and application.
Owner:TONGJI UNIV
Shape-memory alloy stranded wire self-centering frictional buckling-restrained brace
ActiveCN105256913AImprove shock absorptionGood self-resetting functionShock proofingResidual deformationBuckling-restrained brace
The invention provides a shape-memory alloy stranded wire self-centering frictional buckling-restrained brace, and belongs to the technical field of disaster prevention and shock absorption. The shape-memory alloy stranded wire self-centering frictional buckling-restrained brace is mainly composed of a linear steel plate inner core, an inner steel sleeve, an outer steel sleeve, friction plates, high-strength bolts, shape-memory alloy stranded wires, a left end plate, a right end plate, backing plates and anchorage devices; the two ends of the linear steel plate inner core are hinged to stiffening ribs which are connected to the left end plate and the right end plate respectively. The inner steel sleeve serves as a peripheral restriction steel sleeve to be arranged outside the linear steel plate in a sleeving mode, the linear steel plate is arranged in the inner steel sleeve in an opposite angle inclined mode, and a certain gap exists between the inner steel sleeve and the linear steel plate inner core. The inner steel sleeve is connected with the right end plate, the outer steel sleeve is connected with the left end plate, the friction plates are installed between the mutually nested portions of the inner steel sleeve and the outer steel sleeve through the high-strength bolts, and the shape-memory alloy stranded wires are anchored between the inner steel sleeve and the outer steel sleeve through the anchorage devices after being pre-stretched. By means of the shape-memory alloy stranded wire self-centering frictional buckling-restrained brace, the problem that due to the fact that for a conventional brace, excessive residual deformation occurs under the action of a large earthquake or an intermediate-earthquake, the post-earthquake maintenance and reconstruction cost is increased is solved.
Owner:BEIJING UNIV OF TECH
Restricted buckling restrained brace with parallel energy-dissipation mild steel plate and manufacturing method thereof
InactiveCN101984194AEliminate the risk of instabilityAvoid instabilityShock proofingFoaming agentBuckling-restrained brace
The invention relates to a buckling restrained brace with an energy-dissipation device, in particular to a restricted buckling restrained brace with a parallel energy-dissipation mild steel plate and a manufacturing method thereof. In the invention, each steel plate in the beam of the parallel energy-dissipation steel plates is welded on an inner steel plate at equal interval; the steel plate of an outer layer of steel pipes is welded on the parallel energy-dissipation steel plate; all the clearances are filled with foaming agent before the outer steel pipes are sealed so as to prevent the corrosion of the inner structure of the steel pipes; and finally the outer layer of steel pipes is sealed to form the restricted buckling restrained brace with the energy-dissipation mild steel plate. In the invention, the energy-dissipation device is completely arranged inside the outer layer of the steel pipes, and the outer layer of the steel pipes and the inner steel plates are combined into a whole by the energy-dissipation device, thereby solving the problem that the exposed part of the inner core of the existing restricted buckling restrained brace is easy to buckling, overcoming the defects of poor rigidity of the inner core of the existing restricted buckling restrained brace and the poor rigidity and strength of the periphery restrained part, improving the work efficiency of the energy-dissipation device, and making full use of the buckling restrained brace.
Owner:BEIJING UNIV OF TECH
Fiber pre-stretched rod type self-centering steel buckling-restrained brace
InactiveCN102808464AEliminate residual deformationStable and continuous elastic recoveryShock proofingFiberBuckling-restrained brace
The invention discloses a fiber pre-stretched rod type self-centering steel buckling-restrained brace, comprising I-shaped steel, two internal restrained rectangular pipes, external restrained rectangular pipes, two end plates, fiber tension rods and connecting components, wherein the connecting components are arranged at two sides of a web of the I-shaped steel; the external restrained rectangular pipes are sleeved outside the I-shaped steel and the two internal restrained rectangular pipes; two end plates are arranged at the two ends of the I-shaped steel; the fiber tension rods are connected with the two end plates; the connecting components are connected with the end plates; the internal wall at one side of the I-shaped steel is connected with one end of each internal restrained rectangular pipe and the external wall at the other side of the I-shaped steel is connected with one end of each external retrained rectangular pipe; small holes arranged in arrays are arranged on the web of the I-shaped steel; the end plates are provided with nicks which are matched with the cross sections of the I-shaped steel; the end plates are inserted in the end parts of an I-shaped steel energy-consumption unit and are in contact with the end parts of the internal restrained rectangular pipes and the external restrained rectangular pipes; the fiber tension rod is located in the internal restrained rectangular pipes, and the end plates at two ends are tightly pulled by applying pre-stressing forces; and the external sides of the two end plates are respectively connected with the connecting parts.
Owner:SOUTHEAST UNIV
Self-centering buckling-restrained brace beam-column joint
ActiveCN105040831AImprove elastic deformation abilityEliminate deformationShock proofingBuckling-restrained braceSteel frame
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
Buckling restrained brace
InactiveUS20110232221A1Mitigate such drawbackMetal-working apparatusBuilding componentsBuckling-restrained braceCoupling
A buckling restrained brace is for connection between two connecting plates of a framework, and includes a restraining unit and an axial member. The axial member includes a middle section surrounded by the restraining unit, two first coupling sections, and two second coupling sections. The first coupling sections are connected respectively and perpendicularly to opposite longitudinal end portions of the middle section. Each first coupling section has a portion exposed from a respective one of longitudinal ends of the restraining unit, and is formed with a first coupling groove for engaging a respective one of the connecting plates. The second coupling sections are connected respectively and perpendicularly to the opposite longitudinal ends of the middle section. Each second coupling section has a portion exposed from a respective one of the longitudinal end portions of the restraining unit, and is formed with a second coupling groove for engaging a respective one of the connecting plates.
Owner:NAT APPLIED RES LAB
Buckling restrained braces and damping steel structures
InactiveUS20070056225A1Protective buildings/sheltersShock proofingBuckling-restrained braceClassical mechanics
Owner:NIPPON STEEL CORP
Semi-rigid connection-flection restriction support steel skeleton construction
InactiveCN101245611AGuaranteed not to collapseImprove energy consumptionShock proofingBuckling-restrained braceSteel frame
The invention belongs to the technical field of multistoried and high-rise buildings, particularly relates to a semi-rigid connection-bending and constraining support steel frame structure and is composed of a frame column, a frame beam and a bending and constraining support; the frame beam is connected with the frame column by adopting the semi-rigid connection mode and the bending and constraining support is arranged into a center support mode; based on the superiority of the steel structure, the invention can realize the optimum design, save the used steel quantity, reduce the workload of site welding, raise the construction speed, guarantee the quality of connection and is beneficial to structure arrangement; when used in earthquake areas, the restoration after earthquake is convenient and the earthquake damage can be reduced; when the structure is used in the multistoried and high-rise building, the prospect of application is wide.
Owner:TONGJI UNIV
Buckling-restrained brace
ActiveUS20130205690A1Easy to makeMinimal pressureProtective buildings/sheltersShock proofingCardboardNuclear engineering
Disclosed is a buckling restrained brace which is a core plate inside a tube, with the plate prevented from buckling by being surrounded by the tube. The core plate is provided with a layer of discrete springs adjacent the core plate, with the interior of the tube otherwise filled with cement. The layer of discrete springs may be cardboard of other material. The layer of discrete springs defines a space between the core plate and the concrete, to allow for expansion of the core plate under compression from the ends.
Owner:SEISMIC BRACING CO LLC
Buckling restrained braces and damping steel structures
The present invention relates to a buckling restrained brace capable of absorbing vibration energy produced by an earthquake, wind power and the like, in a building and a steel structure. The buckling restrained brace of the present invention is accomplished by a buckling restrained brace 1 wherein a steel-made center axial member 3 is passed through a buckling-constraining concrete member 2 reinforced with a steel member 6, and an adhesion-preventive film 4 is provided to the interface between the steel-made center axial member and buckling-constraining concrete 5, the adhesion-preventive film showing a secant modulus in the thickness direction of at least 0.1 N / mm2 between a point which shows a compressive strain of 0% and a point which shows a compressive strain of 50%, and up to 21,000 N / mm2 between a point which shows a compressive strain of 50% and a point which shows a compressive strain of 75%, and having a thickness dt in the plate thickness direction of the steel-made center axial member and a thickness dw in the plate width direction thereof from at least 0.5 to 10% of the plate thickness t and from at least 0.5 to 10% of the plate width w, respectively, and by the application of the buckling restrained brace to a damping steel structure.
Owner:NIPPON STEEL & SUMIKIN ENG CO LTD
Frequency-modulation mass anti-flection support
InactiveCN101476354AImprove functionalityReduce structural vibrationShock proofingGusset plateBuckling-restrained brace
The invention relates to a frequency-modulation mass buckling-restrained brace, which comprises a frequency-modulation mass vibration reduction part and a buckling-restrained energy dissipation and vibration reduction part, wherein the buckling-restrained energy dissipation and vibration reduction part consists of steel cores which are connected between important gussets of a structure, sleeved steel tubes which are sleeved on active sections of the steel cores, filled concrete and flexible materials which are glued on the surfaces of the steel cores; the frequency-modulation mass vibration reduction part consists of mass blocks, resilient elements and damping materials; the mass blocks are formed by the sleeved steel tubes and the filled concrete; the resilient elements are made of steel plate springs and fixed between gusset plate connecting pieces and the sleeved steel tubes or fixed between support connecting pieces and the sleeved steel tubes; and the damping materials and the flexible materials between the steel cores and the filled concrete of the buckling-restrained energy dissipation and vibration reduction part are shared. The frequency-modulation mass buckling-restrained brace integrates TMD vibration reduction technology and energy dissipation and vibration reduction technology of buckling-restrained braces, has the characteristics of easy manufacture, convenient assembly, economy and durability, non-maintaining and changeability, and simultaneously has the function of vibration reduction in the horizontal direction and the vertical direction.
Owner:BEIJING UNIV OF TECH
Double-casing energy-dissipation inner-core buckling restrained brace member with double yield points
InactiveCN103924702AImprove hysteresis characteristicsReduce internal forceShock proofingBuckling-restrained braceElastic plastic
A double-casing energy-dissipation inner-core buckling restrained brace member with double yield points comprises a low yield-point steel plate of a casing-shape energy-dissipation inner core plate, a high yield-point steel plate of the casing-shape energy-dissipation inner core plate, an external constraint steel plate, an end connecting plate and cement mortar. The problem that according to an existing buckling restrained brace, energy dissipation can be yielded by relying on single material only, the energy dissipation effect cannot be guaranteed during ultra-expected great earthquakes or huge earthquakes are aimed to be solved, and the novel energy dissipation core made by overlapping the low yield-point steel plate and high yield-point steel plate of the energy-dissipation inner core plate is provided. The mechanical characteristic of the low yield point is prone to yielding, and the fine hysteretic characteristic is provided with during shaping, a large amount of energy is absorbed in the process of elastic-plastic hysteretic deformation, the internal force of the rest part of the structure is significantly reduced, and the structure is protected accordingly; the yield point of high-yield-point steel is higher than that of low-yield-point steel, and elasticity can be retained when the low-yield-point steel is yielded.
Owner:BEIJING UNIV OF TECH
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