142 results about "Buckling-restrained brace" patented technology

The invention discloses a self-resetting buckling restrained brace, which relates to the technical field of buckling restraint, and adopts the technical scheme that the self-resetting buckling restrained brace comprises a restraint shell, a core material is arranged in the restraint shell, friction shells are fixedly connected to two sides of the restraint shell, a pressure adjusting shell is fixedly connected to the upper parts of the friction shells, and a servo motor is arranged in the pressure adjusting shell; the output end of the servo motor is provided with a worm, the worm is in meshed connection with a worm gear, the worm gear is fixedly connected with a third gear, the third gear is in meshed connection with a transmission rack, the lower portion of the transmission rack is fixedly connected with a fixed shell, and the lower portion of the fixed shell is fixedly connected with a mounting table. The friction plate is in contact with the surface of the core material, the core material moves in the constraint shell during an earthquake so as to generate friction energy consumption with the surface of the friction plate, and the energy consumption and shock absorption effects of the device are effectively improved through mutual complementation of friction of the friction plate and plastic deformation energy consumption of the core material.

The invention relates to an anti-seismic structure of a building, and particularly discloses an anti-seismic masonry filler wall, a construction method thereof and a buckling restrained brace structure. The anti-seismic masonry filling wall comprises a masonry filling frame jointly defined by a left column body, a right column body, an upper-layer beam body and a lower-layer beam body, and two sets of viscous dampers arranged in the masonry filling frame in a splayed mode. A lower wall body is built in the inner side frame space of the two groups of viscous dampers through bricks; concrete slab strips and upper wall bodies built on the corresponding concrete slab strips through bricks are arranged in outer frame spaces of the two groups of viscous dampers respectively; the middle of each concrete slab strip is connected with the upper-layer beam body through a second concrete constructional column, and the two ends of each concrete slab strip are fixed to the beam side gusset plate assembly and the corresponding column side gusset plate assembly through internally-arranged main reinforcements. The technical difficulty of integral connection of the viscous damper between the beam side gusset plate assembly and the corresponding column side gusset plate assembly is effectively reduced, and the operation efficiency and the anti-seismic quality are improved.

The utility model provides a modular buckling restrained brace beam column insertion type connecting joint, belongs to the technical field of fabricated buildings, and solves the problems of low mounting efficiency, high maintenance difficulty, low strength, low support energy consumption, poor support surface external stability and the like existing in a joint when an existing brace is connected with a structural beam column. The joint comprises an H-shaped steel column, an I-shaped steel beam, a buckling restrained brace, a steel joint prefabricated module connecting piece, a beam-column prefabricated module connecting piece, an anti-lateral steel plate, an H-shaped stiffening rib and an L-shaped stiffening rib, the brace in the joint is connected in a high-strength bolt insertion mode, and the joint has the advantages of being convenient to construct, high in installation efficiency and easy to repair after an earthquake. The prefabricated steel module can increase the sector inertia moment of the cross-shaped connecting section, so that the prefabricated steel module counteracts the load of the support keeping a linear balance form, and the out-of-plane stability of the support is improved. Meanwhile, the connecting length of the support is shortened, the energy dissipation capacity of the support is improved, and the problem of in-plane bending moment response caused by the too long connecting section is avoided.

The invention relates to a shape memory alloy plate buckling restrained brace with friction energy dissipation and a using method. The buckling restrained brace comprises a core plate, stiffening plates arranged at the two ends of the core plate, buckling restrained cover plates arranged on the upper side and the lower side of the core plate, angle steel used for connecting the stiffening plates and the buckling restrained cover plates, and filling plates arranged between the core plate and the buckling restrained cover plates. The core plate is an iron-based shape memory alloy plate and can recover deformation caused by earthquake load under local heating; long slotted holes are formed in the stiffening plates, the buckling constraint cover plates and the angle steel, the stiffening plates and the angle steel are connected through bolt assemblies, the buckling constraint cover plates and the angle steel are connected through bolt assemblies, the filling plates and the buckling constraint cover plates on the two sides are connected through bolt assemblies, and energy is consumed between the bolt assemblies and the long slotted holes through friction. Compared with the prior art, the buckling restrained brace can be used as a lateral force resistance and energy consumption component of a steel frame structure, and has the advantages of being easy to reset, high in energy consumption, easy to assemble and disassemble and the like.

The invention provides a method and system for detecting the subsequent service life of a post-earthquake buckling restrained brace. The method belongs to the field of buckling restrained brace detection and comprises the following steps: acquiring vibration signals corresponding to different D values of the buckling restrained brace; processing the vibration signal by adopting a frequency response function difference method considering statistics to obtain AD values under different damages; constructing a relationship between the D value and the AD value; and determining the relationship between the D value and the subsequent service life according to the subsequent earthquake frequency degree of the area where the to-be-tested piece is located and the reliability required by the to-be-tested piece, and determining the relationship between the AD value and the subsequent service life according to the relationship between the D value and the AD value. The nondestructive testing of the buckling restrained brace is realized, and the integrity and the safety of the component are ensured.

The present disclosure provides a multi-stage buckling-restrained brace device. The device comprises the parallel cores system, load-transfer system, and restrainer system. The parallel cores system consists of the energy dissipation component, placed between the two supporting plates. The load-transfer system consists of the first and second supporting plates, which are spaced along a specific direction. The restrainer system consists of the restraining component, which prevents buckling of the energy dissipation component under compression. The restraining component includes a first sliding plate, a second sliding plate, a first connecting component and a second connecting component, while the energy dissipation component includes a first core plate and several high-stage core plates. The first sliding plate is fixedly connected to both the first core plate and the first supporting plate, and the second sliding plate is fixedly connected to both the first core plate and the second supporting plate. The two ends of the high-stage core plates are respectively spaced from the first supporting plate and the second supporting plate to form adjustable gaps. The present disclosure can adaptively meet both the load-bearing capacity and energy dissipation demands under different levels of external excitation.

The invention belongs to the technical field of earthquake toughness improvement of old buildings and earthquake response rapid calculation based on an artificial intelligence technology, and discloses a node for a BRB reinforced old reinforced concrete frame structure, a design method and an earthquake toughness improvement rapid evaluation method of the BRB reinforced old reinforced concrete frame structure. The joint comprises a frame structure beam column joint composed of a reinforced concrete beam component, a column component and a plate component, a buckling restrained brace, a high-strength bolt, a connecting plate, a cladding plate, a bottom plate and stiffening ribs. According to the connection node structure provided by the invention, the damage to the opening positions of the plate components is easier to control through the structure design compared with the damage to the opening positions of the beam and column components in the conventional connection node structure, and the integrity and the bearing capacity of the beam and column components serving as main bearing components of the structure are better protected. According to the probability-based earthquake toughness improvement evaluation method, the structural vulnerability is adopted as a comparison parameter, and the reinforcing effect of the buckling restrained brace on the structure is displayed more visually and more comprehensively through vulnerability control rate analysis.

To provide a buckling-restrained brace capable of sufficiently exhibiting the axial strength of a core member against axial compressive loads.SOLUTION: A buckling-restrained brace 100 comprises: an elongate core member 10; a covering member 50 that covers the surface of the core member 10; a tubular restraining member 30 that houses the core member 10 such that both ends thereof protrude; and a filler 40 filled between the restraining member 30 and the core member 10. The core member 10 comprises a plasticized portion 11 having a smaller cross-sectional area than both end portions. The covering member 50 is in close contact with the surface of the core member 10 in the region where the filler 40 is present along the longitudinal direction of the core member 10. The thickness of a portion of the covering member corresponding to the plasticized portion 11 is constant in the longitudinal direction of the core member 10.SELECTED DRAWING: Figure 1

This invention discloses a method and system for reinforcing old buildings in urban renewal, comprising the following steps: comprehensive diagnosis and performance evaluation of the old building; decision-making on the structural reinforcement system based on the performance evaluation results to obtain the optimal structural reinforcement system; reinforcement of key components and nodes of the old building according to the optimal structural reinforcement system; predictive maintenance of the reinforced old building through collaborative improvement and real-time monitoring; integration of three-dimensional laser scanning, finite element analysis, and various material performance testing technologies to accurately assess the current state of the building; and the use of high-performance composite mortar wire mesh, carbon fiber cloth, and buckling restraint braces to enhance the structural bearing capacity and seismic toughness. Simultaneously, combined with integrated structural-insulation design and long-term health monitoring, this method enhances safety while also considering energy conservation, environmental protection, and historical preservation, exhibiting significant advantages such as data-driven approach, toughness priority, functional synergy, and intelligent operation and maintenance. This invention is rationally designed, compact in structure, and easy to use.

The invention discloses an all-steel assembly type step-by-step constraint multiple energy consumption buckling restrained brace which comprises an inner core, a right connecting plate and a left connecting plate, and further comprises asymmetric T-shaped steel, a connecting piece and an outer steel pipe, the inner core is located between the left connecting plate and the right connecting plate, and the asymmetric T-shaped steel is fixedly connected with the inner core through bolts to form a symmetric structure; the two ends of the asymmetric T-shaped steel are fixedly connected with the left and right connecting plates through connecting pieces, the outer side of the asymmetric T-shaped steel is sleeved with an outer steel pipe, the left end of the outer steel pipe is not connected with the left connecting plate, and the right end of the outer steel pipe is connected with the right connecting plate. On the premise that the buckling-restrained energy consumption requirement is met, the structural design is optimized, so that the structure is light, the energy consumption capacity is improved, and meanwhile the moment of inertia of the section is increased. The method is suitable for various building structures, in particular to high-rise buildings, large-span buildings and existing buildings needing seismic strengthening.

The invention relates to a damping type composite partition wall construction method which comprises the following construction steps that embedded parts of buckling restrained brace members are installed, and installation of the embedded parts and steel bar formwork engineering of a main body frame structure are conducted synchronously; mounting a gusset plate and fixedly connecting the gusset plate with the embedded part; after the positions of the gusset plates are checked, hoisting equipment is used for transporting, hoisting and butting the buckling restrained brace members in a mode that the two ends are unequal in height; fixing the lower end of the buckling restrained brace member after the buckling restrained brace member is pulled in place, then fixing the upper end of the buckling restrained brace member in place, and welding a gusset plate after correction; carrying out nondestructive testing on the connection welding seam; after the buckling restrained brace component is installed, the upper wall body of the double-angle steel support is welded, the transverse tie bars of the wall body are tied in a full-length mode, and wall body building and wall body plastering and net hanging construction are conducted. The technical effects that the construction efficiency is improved, the installation quality of the buckling restrained brace component is guaranteed, and the integrality, stability and flatness of the wall are enhanced are achieved.

The invention belongs to the technical field of restrained braces, and particularly relates to a viscoelastic double-step all-steel buckling restrained brace which comprises an outer sleeve, two viscoelastic devices, a core plate and a limiting structure, the outer sleeve, the two viscoelastic devices and the core plate are arranged, and the two viscoelastic devices are embedded in the inner side and the outer side of the two ends of the outer sleeve respectively; the viscoelastic material can absorb and dissipate energy generated by earthquakes or wind loads through shear deformation, the vibration response of a structure body is effectively reduced, the anti-seismic performance of a building is improved, the core plate movably penetrates through the viscoelastic device and is arranged in the outer sleeve, the core plate is preliminarily restrained through the outer sleeve, and the anti-seismic performance of the building is improved. According to the limiting structure, the side plates and the multiple limiting plates are matched to limit the core plate, lateral displacement of the core plate can be limited, bending instability of the core plate in the stress process is prevented, it is ensured that the core plate is mainly subjected to axial deformation all the time, and the anti-seismic property of the viscoelastic device is fully exerted.

The present invention discloses a composite staged energy dissipation anti-buckling restraint support, comprising a core plate, side plates are provided on both sides of the core plate, a viscoelastic layer is provided between each side plate and the core plate, multiple groups of strip-shaped movable holes are provided through the core plate, each strip-shaped movable hole group is composed of two strip-shaped movable holes symmetrically provided at both ends of the core plate, multiple groups of circular holes corresponding to the strip-shaped movable holes are provided through each side plate, each circular hole group is composed of two circular holes symmetrically provided at both ends of the corresponding side plate; the distance between the inner end points of the two strip-shaped movable holes in each strip-shaped movable hole group is smaller than the distance between the two circular holes in the corresponding circular hole group, and the center distance between the two strip-shaped movable holes in each strip-shaped movable hole group is larger than the distance between the two circular holes in the corresponding circular hole group. The present invention realizes staged energy dissipation through material composite to meet the energy dissipation requirements of building structures under the action of small earthquakes, medium earthquakes, large earthquakes, and super-large earthquakes.

The application discloses a high-ductility fracture-free double-yield-point buckling-restrained brace with a cross-shaped steel negative Poisson's ratio core and a multi-storey or high-rise fabricated building, and the buckling-restrained brace comprises a cross-shaped steel first-order core, a corner steel second-order core, and corner steel peripheral constraints; the cross-shaped steel first-order core comprises a middle negative Poisson's ratio weakening area one in the middle of the cross-shaped steel; the corner steel second-order core comprises a middle negative Poisson's ratio weakening area two in the middle of the corner steel; the corner steel peripheral constraints comprise a middle pre-tightening area in the middle of the corner steel; four groups of the corner steel second-order core are respectively arranged at four corners of the cross-shaped steel first-order core; four groups of the corner steel peripheral constraints are respectively arranged at peripheries of the four groups of the corner steel second-order core and are pre-tightened in the middle pre-tightening area; the cross-shaped steel first-order core can produce a first displacement longitudinal sliding relative to the corner steel second-order core; the corner steel second-order core can produce a second displacement longitudinal sliding relative to the corner steel peripheral constraints; and the second displacement is greater than the first displacement. The application aims to solve the problems of the buckling-restrained brace, such as insufficient ductility, easy fracture and limited energy dissipation of the core under an earthquake.

The present invention belongs to the technical field of civil engineering and relates to a roller-supported buckling-restrained brace, comprising: an external restraint member and an internal core plate. The external restraint member is tubular, and the radial cross-section of the inner hole is cross-shaped. The symmetry axis in the length direction of the inner hole coincides with the symmetry axis in the length direction of the external restraint member. The internal core plate is a cross-shaped plate that is orthogonal. The internal core plate matches the shape and size of the inner hole. A clearance fit is provided between the internal core plate and the inner hole. Connection segments are provided at both ends of the internal core plate, and a yield segment with a reduced radial dimension is provided in the middle of the two connection segments. Multiple rollers are provided on the yield segment. In the present invention, by opening a cross-shaped inner hole on the external restraint member, inserting an internal core plate of the same shape into the inner hole, and arranging rollers in the inner hole, the yield segment of the internal core plate is connected by rolling of the rollers. When the structure encounters an earthquake, the yield segment of the internal core plate yields earlier, showing good elastic and ductile characteristics and entering the energy dissipation state, ensuring the safety of the main structure.

The invention relates to a reverse friction buckling-restrained energy dissipation support and a control method, the reverse friction buckling-restrained energy dissipation support comprises a buckling-free energy dissipation unit, a forward constraint unit and a reverse constraint unit, and the forward constraint unit is arranged at one end of the buckling-free energy dissipation unit and is in sliding connection with the end of the buckling-free energy dissipation unit; the reverse constraint unit is arranged at the other end of the buckling-free energy dissipation unit and is fixedly connected with the end of the buckling-free energy dissipation unit; wherein the forward constraint unit and the reverse constraint unit are oppositely arranged, and when the support bears an axial load, the forward constraint unit and the reverse constraint unit respectively follow different end parts of the buckling-free energy dissipation unit to move in opposite directions, so that a reverse friction mechanism is realized. According to the reverse friction buckling-restrained energy dissipation support and the control method, the double-order yield of the buckling energy dissipation support is fused with the support limiting device, meanwhile, the friction force in the energy dissipation core of the buckling restrained support is self-balanced, the deformation uniformity of the support is improved, and therefore the fatigue performance is improved. The overall structure of the support is free of numerous external additional devices, low in manufacturing cost and convenient for engineering application.

The present invention relates to the technical field of energy dissipation and shock absorption of building structures, and specifically to a buckling-restrained support cantilever truss and a composite shock-absorbing high-rise structure system. The buckling-restrained support cantilever truss is connected between an inner tube and an outer tube, and the diagonal web is a non-yielding load-bearing first buckling-restrained support and a yielding energy-absorbing second buckling-restrained support arranged in parallel, comprising a cantilever truss, a toggle second link, and a viscous damper. A composite shock-absorbing high-rise structure system is formed by combining the buckling-restrained support cantilever truss and a multiple displacement amplification viscous energy dissipation mechanism. The cantilever truss and the energy dissipation mechanism work together, the energy dissipation and stiffness mechanisms are diverse and coordinated, the shock absorption effect is obvious and effective, and multiple defense lines of the high-rise structure can be realized. The structure is simple, the construction is convenient, and the building space usability and economy are good.

The utility model discloses a replaceable buckling restrained brace device, particularly relates to buckling restrained brace technical field, including core material, reinforcing sleeve and packing layer, the packing layer is provided between core material and reinforcing sleeve, core material outer wall surface and reinforcing sleeve inner wall surface are both provided with the non-adhesive layer, the packing layer is provided with the non-adhesive layer. Fixing grooves are formed in the top and the bottom of the reinforcing sleeve, fixing covers are detachably connected into the two fixing grooves, through holes matched with the core material are formed in the tops of the two fixing covers, and the core material penetrates through the two through holes. The buckling restrained brace device is composed of the core material, the reinforcing sleeve, the non-bonding layer, the filling layer and the fixing cover, can resist slight earthquakes, medium-grade earthquakes, high-grade earthquakes and wind loads, can also serve as an efficient energy dissipation damper, reduces response of the structure in the earthquakes through energy dissipation, accordingly improves the anti-seismic performance of the structure, and reduces the construction cost. And the two fixing covers are disassembled, so that the core material is convenient to replace and the sleeve is convenient to reinforce.

The present invention relates to the technical field of energy dissipation and seismic reduction in civil engineering, and discloses a buckling-restrained brace, comprising: a monitoring assembly, the monitoring assembly includes: a first force-measuring device disposed on the outer sidewall of the energy-dissipating inner core; two connecting mechanisms oppositely arranged, both of the two connecting mechanisms are fixed on the outer sidewall of the energy-dissipating inner core; a displacement detection mechanism disposed between the two connecting mechanisms, the displacement detection mechanism includes an intermediate connecting member, an elastic member and a second force-measuring device, the intermediate connecting member is disposed on one of the connecting mechanisms, the first end of the elastic member is connected to the intermediate connecting member, the second end of the elastic member is connected to the other connecting mechanism, and the second force-measuring device is disposed on the intermediate connecting member. By providing the monitoring assembly, the buckling-restrained brace provided by the present invention can monitor its own working state.

The invention relates to the technical field of building supports, in particular to a rhombic arrangement buckling restrained brace for a building, which comprises a buckling support component group and lateral mounting seat component groups which are symmetrically arranged, and a base plate of a support seat component in the buckling support component group is fixed on a building component through a chemical expansion bolt I; and a side seat body in the lateral mounting seat component group is mounted on a building column body through a chemical expansion bolt II. Rapid installation is achieved through the folding type mechanical unfolding mechanism and the detachable connection design, and the technical problems that a traditional buckling support is low in installation efficiency, poor in environmental adaptability and sheltered in space are solved while the anti-seismic performance is improved by combining the friction energy dissipation system for dynamically absorbing power action energy and the rhombic symmetrical force transmission layout.

To provide a buckling restraint brace fitted with a wooden restraining material high in biting resistance.SOLUTION: A buckling restraint brace 100 comprises: a steel plate-like core material 10; and a wooden restraining body 20 formed by a pair of wooden restraining materials 30 and disposed to face the two wide surfaces 10a of at least the core material 10. Each of the restraining materials 30 is provided with a first restraining material 33 relatively high in biting strength and a second restraining material 34 relatively low in biting strength. One wide surface 31 of the first restraining material 33 is in contact with the wide surface 10a of the core material 10, and the wide surface 31 of the second restraining materials 34 is in contact with the other wide surface 31 of the first restraining material 33.SELECTED DRAWING: Figure 3B

The application relates to a self-resetting buckling restrained brace based on disc spring resetting and slope core plate energy dissipation, which comprises a shell, a slope core plate, a fixed restraint cover plate assembly, disc springs and a movable restraint cover plate assembly; the upper surface and the lower surface of the slope core plate are uniformly arranged with the movable restraint cover plate assembly, the inner side of the end part of the movable restraint cover plate assembly relative to the slope core plate is provided with a movable cover plate self-resetting slope, the movable cover plate self-resetting slope is matched and contacted with the core plate slope protrusion on the same side; the outer side of the end part of the movable restraint cover plate assembly relative to the slope core plate is provided with a plurality of disc springs; the fixed restraint cover plate assembly is installed between the core plate energy dissipation section and the movable restraint cover plate assembly on the upper surface or the lower surface of the slope core plate, the fixed restraint cover plate assembly is fixed with the shell covered outside the whole structure through a plurality of fixed cover plate bolts penetrating the movable restraint cover plate assembly on the same side. The application simplifies the structure and can automatically restore to the initial state after plastic deformation under external force.

This invention relates to the field of building engineering technology, specifically to a load-bearing-multi-stage energy-dissipating buckling-restrained brace composite damping component. It includes a connecting column and a bolt reinforcement assembly. The assembly includes a friction box fitted onto one end of the connecting column, with a first bolt threaded between the friction box and the connecting column. A reinforcement plate is slidably installed within the friction box; when there is relative displacement between the connecting column and the friction box, the reinforcement plate slides towards tightening the first bolt. The energy-absorbing reinforcement assembly includes a connecting plate connected to the other end of the connecting column, with an energy-absorbing box installed near the connecting plate end of the connecting column. A reverse pulling member is installed between the energy-absorbing boxes. By setting a bolt reinforcement assembly at the end of the connecting column, the bolt is reinforced using the relative displacement between the connecting column and the friction box. This not only absorbs vibrations but also converts that energy for bolt reinforcement. Furthermore, the energy-absorbing reinforcement assembly and the reverse pulling member further enhance the damping effect.

The utility model relates to the technical field of anti-seismic building structures, in particular to a hot-rolled H-shaped steel buckling restrained brace which comprises a sleeve, an inner core is arranged in the sleeve in a matched mode, installation components are arranged at the two ends of the inner core, the installation components are sleeved with end sealing plates, the end sealing plates are used for preventing filler in the sleeve from leaking, and the filler is arranged between the sleeve and the inner core. The inner core is composed of the H-shaped steel and the auxiliary yield plate which are matched with each other, webs of the H-shaped steel and the auxiliary yield plate are corrugated, and the anti-seismic effect of the constraint support is improved; the supporting performance is high, the anti-seismic performance is high, and the structural stability is good.

The invention discloses a steel-inorganic glue composite bamboo buckling restrained brace device and a construction method, and belongs to the technical field of building structures. The length of the core component is larger than that of the restraining component, the core component comprises a linear steel plate, a plurality of long-strip-shaped holes are formed in the linear steel plate, connecting end plates are arranged at the two ends of the linear steel plate, and stiffening ribs are arranged on the two sides of each connecting end plate. The restraining component comprises two inorganic glue composite bamboos, two side bearing plates and two base plates, the side bearing plates are arranged on the inner sides of the two inorganic glue composite bamboos, and the linear steel plate and the base plates are arranged between the two side bearing plates and are clamped through first connecting pieces to form the whole restraining component. The thickness of the base plate is larger than that of the linear steel plate, and PVC films are arranged between the two side bearing plates and the core component. The problem that effective buffering cannot be achieved due to the fact that the buckling restrained brace is poor in energy absorption effect and short in fatigue life is solved.

The invention belongs to the technical field of buckling restrained brace damage detection, and particularly discloses a method for detecting the damage position and degree of a buckling restrained brace, and the method comprises the steps: collecting a reference signal of a buckling restrained brace under an undamaged working condition, obtaining a signal under each damaged working condition through a fatigue test, and extracting modal features; based on the modal features, establishing a mathematical relationship model of the modal curvature difference and the wavelet coefficient difference with the damage degree; actual damaged buckling restrained brace signals are collected, modal information is extracted, a modal curvature difference method based on statistics and wavelet coefficient difference analysis are adopted to determine the damage position, and the modal curvature difference and the wavelet coefficient difference corresponding to the damage position are extracted; and determining the damage degree according to the mathematical relationship model of the modal curvature difference, the wavelet coefficient difference and the damage degree, the modal curvature difference and the wavelet coefficient difference. The problems that an existing buckling restrained brace damage detection method cannot accurately recognize the damage position, cannot evaluate plastic deformation, and is high in detection cost and complex in operation are solved.

The present application relates to the technical field of support component, in particular to a kind of buckling-restrained brace component in the anti-seismic of venue;Including cross-shaped core component, four first angle steels, four second angle steels, external frame and two end covers, after first angle steel is placed in the inside of the right angle included angle of cross-shaped core component, second angle steel is placed in the inner side wall of first angle steel, external frame is clamped in the outside of second angle steel and first angle steel by the cooperation of first clamping slot and second clamping slot, after one of end covers is installed in the one end of external frame, concrete is filled in the outside of first concrete cavity and second concrete cavity, another end cover is arranged in the other end of external frame, the installation of buckling-restrained brace component is completed, cross-shaped core component, first angle steel, second angle steel, external frame and two end covers in the above structure are all processed in factory, precision is easy to control, so that it is more convenient when on-site construction.

The utility model provides a two-stage energy-dissipation buckling restrained brace which comprises a yield energy-dissipation component, a buckling restrained brace body and a buckling restrained brace body. The two ends of the yield energy-dissipation component are lead screw sections, and the middle of the yield energy-dissipation component is a buckling energy-dissipation section. The restraining sleeve is arranged on the yield energy dissipation component in a sleeving mode; the two connecting blocks are arranged on the two lead screw sections of the yield energy dissipation component in a sleeving mode correspondingly; the two friction energy dissipation modules correspond to the connecting blocks one to one and are installed in the connecting blocks, the two lead screw sections of the yield energy dissipation component are each sleeved with one friction energy dissipation module, the friction energy dissipation modules can be in friction with the connecting blocks in the connecting blocks and rotate, and relative rotation and axial relative movement exist between the lead screw sections and the friction energy dissipation modules; and the locking assembly is arranged in the connecting block and used for locking the friction energy consumption module so that the friction energy consumption module cannot rotate. The shock absorption efficiency of the structure can be improved, the engineering economy is optimized, and the design targets of shock and vibration double control and efficient shock absorption are achieved.