506 results about "Buckling-restrained brace" patented technology

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.

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.

A linear buckling restrained brace with transverse partition double-layered bushing is provided. The core steel brace comprises a middle segment (buckling segment) as major body with a smaller width, two distal end segments (extension segments), and a transition segment between the buckling segment and the extension segment. The cross section of the buckling segment is shaped like the Chinese character 'Yi'. The cross sections of the transition segment and extension segment are cruciform. A transverse partition is welded in the middle of the buckling segment and provided outside with outer restraining steel bushings at two sides. An inner steel bushing is arranged between the outer restraining steel bushing and the core steel and has a linear cross section with respect to the buckling segment and a cruciform cross section with respect to the transition segment. The space between the inner steel bushing and outer restraining steel bushing is packed with fillers. An anti-adhesion material is coated on the surface 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 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.

A dual-core self-centering buckling-restrained brace includes a core unit, a restraining unit clamping the core unit therein, a middle sleeve disposed around the an energy dissipating section of the core unit and the restraining unit and having an end welded to one end of the core unit, an outer sleeve disposed around the middle sleeve and having an end welded to the other end of the core unit, two inner plates disposed respectively at two ends of the restraining unit, two outer plates disposed respectively at two ends of each of the middle sleeve and said outer sleeve, at least one first tensing member connecting the first inner plate to the second outer plate, and at least one second tensioning element connecting the first outer plate to the second inner plate.

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.

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.

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.

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.

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.

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.

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.

The invention relates to a buckling restrained brace with an energy dissipation device sandwiched with a lead layer and provided with steel plates at two ends and a method for manufacturing the buckling restrained brace. An inner steel plate is connected with an outer-layer steel tube steel plate by the energy dissipation device sandwiched with the lead layer and provided with the parallel flexible steel plates, restraining filling materials are filled in a space between a buckling restrained section of the inner steel plate and an outer-layer steel tube before the outer-layer steel tube is sealed, then the outer-layer steel tube is sealed, and accordingly the buckling restrained brace with the energy dissipation device sandwiched with the lead layer and provided with the steel plates at the two ends is formed. The shortcoming that an outer-layer buckling restrained steel plate of an existing buckling restrained brace cannot be sufficiently utilized is overcome, and the problem of early yielding of an exposed portion of an inner core is avoided. Furthermore, the inner steel plate is connected with the outer-layer steel tube by the energy dissipation device sandwiched with the lead layer and provided with the parallel flexible steel plates, axial force is partially transmitted to the outer-layer steel tube via the inner steel plate and the energy dissipation device sandwiched with the lead layer and provided with the parallel flexible steel plates, and the rigidity and the energy dissipation capacity of the integral buckling restrained brace are improved. In addition, the energy dissipation capacity of the buckling restrained brace is improved by 20% to 50% as compared with a traditional buckling 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.

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.

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.

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.

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.

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 d_t in the plate thickness direction of the steel-made center axial member and a thickness d_w 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.

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.

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.