CN117286943A - Series-type buckling restrained brace with double yield points - Google Patents
Series-type buckling restrained brace with double yield points Download PDFInfo
- Publication number
- CN117286943A CN117286943A CN202311588044.6A CN202311588044A CN117286943A CN 117286943 A CN117286943 A CN 117286943A CN 202311588044 A CN202311588044 A CN 202311588044A CN 117286943 A CN117286943 A CN 117286943A
- Authority
- CN
- China
- Prior art keywords
- outer sleeve
- core material
- yield
- yielding
- yielding section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011162 core material Substances 0.000 claims abstract description 174
- 238000003466 welding Methods 0.000 claims abstract description 16
- 238000010008 shearing Methods 0.000 claims abstract description 9
- 238000005265 energy consumption Methods 0.000 claims description 45
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 230000009977 dual effect Effects 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000004044 response Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000452 restraining effect Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
Abstract
The invention relates to a series-connection type buckling restrained brace with double yield points, which comprises the following components: the outer sleeve comprises a first outer sleeve and a second outer sleeve, the first outer sleeve is connected with the second outer sleeve in series, a plurality of shearing resistant grooves are formed in the first outer sleeve along the circumferential direction, and the shearing resistant grooves are uniformly distributed along the longitudinal axis direction of the first outer sleeve; the yielding core comprises a first yielding section core material and a second yielding section core material, the first yielding section core material longitudinally penetrates through the first outer sleeve, and a plurality of shear keys are arranged on the first yielding section core material; the second yielding section core material longitudinally penetrates through the second outer sleeve and is in butt welding fixation with the first yielding section core material; and the confined concrete is filled between the first outer sleeve and the first yielding section core material and between the second outer sleeve and the second yielding section core material. The buckling restrained brace overcomes the defect of bearing capacity of the existing buckling restrained brace, can meet the requirement of large tonnage, saves the manufacturing cost, and improves the application range of the double yield point restrained brace.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to support energy consumption of a structure, and particularly relates to a series double-yield-point buckling restrained brace.
Background
The buckling restrained brace is a brace device with simple structure, clear force transmission mechanism and stable stress. Compared with the common steel support, the tension and compression performance of the steel support is fully reflected, so that the steel support is widely applied to various new structures or earthquake-resistant repair buildings.
The common buckling restrained brace solves the problem of compression stability of the common steel brace, the full-section performance of the energy-consuming core material is fully applied, the energy consumption is not participated in due to elasticity in small earthquake, certain damping and rigidity can be provided in middle earthquake, however, the rigidity of the common restrained brace is reduced after buckling in large earthquake, and even the core material is possibly invalid in the case of extremely large earthquake, so that rigidity and deformability are lost, and collapse of a structural weak layer is finally caused.
For example, in a frame structure system, deformation is easy to concentrate in a weak layer and a region with larger shearing deformation at the bottom, the buckling restrained brace is arranged to effectively change and control the deformation of the structure, and the buckling restrained brace can provide reliable rigidity and keep elasticity in small earthquake, but when the earthquake is fortified and rare earthquakes occur, the energy-consumption core material yields to reduce the integral rigidity of the buckling restrained brace, and the deformation control capability of the buckling restrained brace is also lost with the increase of earthquake response.
Therefore, in order to remarkably improve the bearing capacity and the energy consumption capacity of the buckling restrained device and reduce the manufacturing cost and the construction difficulty, a novel series-based double-order yield point energy dissipation and shock absorption device is required to be provided so as to meet the deformation amplitude values under different earthquake levels.
Disclosure of Invention
In view of the shortcomings of the prior art, a primary object of the present invention is to provide a tandem dual yield point buckling restrained brace that solves one or more of the problems of the prior art.
The technical scheme of the invention is as follows:
a tandem dual yield point buckling restrained brace comprising:
the outer sleeve comprises a first outer sleeve and a second outer sleeve, a plurality of shearing resistant grooves are uniformly formed in the first outer sleeve along the circumferential direction, and the shearing resistant grooves are distributed along the longitudinal axis direction of the first outer sleeve;
the yielding inner core comprises a first yielding section core material and a second yielding section core material, the first yielding section core material is arranged in the first outer sleeve, the second yielding section core material is arranged in the second outer sleeve, and a plurality of shear keys are radially arranged on the first yielding section core material and used for being inserted into a plurality of shear grooves;
the confined concrete is filled in the first outer sleeve and the second outer sleeve; and is also provided with
The first yielding section core material is fixedly connected with the second yielding section core material in a butt joint mode, the first outer sleeve and the first yielding section core material form a first yielding section, the second outer sleeve and the second yielding section core material form a second yielding section, and the rigidity of the first yielding section core material is smaller than that of the second yielding section core material, so that the first yielding section consumes energy in a first stage, and the second yielding section consumes energy in a second stage when the shear key reaches preset displacement in the shear groove.
Preferably, the first outer sleeve is formed by butt welding two semicircular plates.
Preferably, the first yielding section core material comprises a first energy consumption part and a first connecting part, the first energy consumption part is arranged in the first outer sleeve, and the first connecting part is arranged outside the first outer sleeve along one end of the first energy consumption part, which is far away from the second yielding section core material; and/or
The second yielding section core material comprises a second energy consumption part and a second connecting part, the second energy consumption part is arranged in the second outer sleeve, and the second connecting part is arranged outside the second outer sleeve along one end, away from the first yielding section core material, of the second energy consumption part.
Preferably, the cross section of the first yielding section core material is in a straight shape or a cross shape.
Preferably, the cross section of the second yielding section core material is cross-shaped, I-shaped or king-shaped, and the cross section size of the second yielding section core material is larger than that of the first yielding section core material.
Preferably, the length of the shear key is smaller than the length of the notch of the shear groove, and a deformation gap is reserved between the shear key and the notch of the shear groove.
Preferably, one end of the first yield section core material is welded with an end plate, and the first yield section core material is welded and fixed with the corresponding second yield section core material through the end plate; or one end of the first yielding section core material is welded with a first end plate, one end of the second yielding section core material corresponding to the first yielding section core material is welded with a second end plate, and the first end plate and the second end plate are in butt welding or bolting fixation.
Preferably, the end plate is welded and fixed with the first outer sleeve and the second outer sleeve along two sides of the end plate.
Preferably, the first end plate is welded with the end part of the first outer sleeve, and the cross section size of the first end plate is not smaller than the inner cylinder diameter size of the first outer sleeve; and/or
The second end plate is welded with the end part of the second outer sleeve, and the cross section size of the second end plate is not smaller than the inner cylinder diameter size of the second outer sleeve.
Preferably, the inner cylinder diameter of the first outer sleeve is smaller than the inner cylinder diameter of the second outer sleeve.
Preferably, the stiffness of the second yield segment core material is less than the stiffness of the first outer sleeve.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a series-connection type buckling restrained brace with double yield points, which is provided with two energy consumption sections, can sequentially yield in stages by utilizing different energy consumption sections under small deformation and large deformation according to different earthquake responses, has definite bearing capacity transmission, and is convenient to produce and install.
The invention forms a first yielding section through the first outer sleeve and the first yielding section core material which are matched with the constraint concrete filled between the first outer sleeve and the first yielding section core material, the invention utilizes the first yielding section to yield and consume energy under small or medium earthquake, forms a second yielding section through the second outer sleeve and the second yielding section core material which are matched with the constraint concrete filled between the second outer sleeve and the second yielding section core material, and the second yielding section yields and consumes energy under medium or large earthquake after the first yielding section exits from working.
According to the invention, the shear key is inserted into the shear groove to realize the connection of the core material of the first yield section and the first outer sleeve, so that the integral bearing capacity of the first yield section is improved, the defect of the bearing capacity of the existing buckling restrained device is overcome, the requirement of large tonnage can be met, the manufacturing cost is saved, and the application range of the double yield point restrained brace is improved.
When the double-yield-point buckling restrained brace works, the first-yield-section core material is controlled to displace, and then the first-yield-section core material is withdrawn from working and is converted into the first outer sleeve to bear force through a shear key mechanism, so that the second-yield stage is entered.
According to the buckling restrained brace with the double yield points, different performance parameters can be set by changing the sections and the forms of different energy consumption sections, so that the yield points and the rigidity of two stages can be flexibly controlled, deformation distribution can be flexibly adjusted according to the deformation of the weak layers of different structures, the floor yield mechanism of the structure is enabled to migrate, the problems of concentrated deformation and uneven damage of the weak layers are finally controlled, the reasonable deformation coordination target of the structure is realized, and the aim of cooperative energy consumption of all floors is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims.
FIG. 1 is a schematic view of the overall structure of a tandem dual yield point buckling restrained brace according to some embodiments of the present invention;
FIG. 2 is a schematic view of a disassembled structure of a tandem dual yield point buckling restrained brace according to some embodiments of the present invention;
FIG. 3 is a schematic view of the overall structure of a first yield segment according to some embodiments of the invention;
FIG. 4 is a schematic illustration of the overall structure of a second yield segment according to some embodiments of the invention;
FIG. 5 is a schematic view of a first outer sleeve of two different configurations of the present invention, wherein (a) represents a circular sleeve and (b) represents a square sleeve;
FIG. 6 is a schematic view of a square sleeve as a second outer sleeve according to some embodiments of the present invention;
FIG. 7 is a schematic illustration of a process for making a first outer sleeve according to some embodiments of the present invention, wherein (a) represents prior to forming and (b) represents after forming;
FIG. 8 is a schematic view of a partial shear section of a first yield segment according to some embodiments of the invention;
FIG. 9 is an enlarged schematic view of the shear section of FIG. 8 in longitudinal section;
FIG. 10 is a schematic illustration of a process for making a first yield segment core material according to some embodiments of the present invention, wherein (a) represents prior to forming and (b) represents after forming;
FIG. 11 is a schematic view of a first energy dissipating core material of two different structural forms of the present invention, wherein (a) represents an I shape and (b) represents a king shape;
figure 12 is a schematic transverse cross-sectional view of a second yield segment of some embodiments of the invention;
FIG. 13 is a schematic illustration of a process for making a second yield segment core material according to some embodiments of the present invention, wherein (a) represents prior to forming and (b) represents after forming;
figure 14 is a skeleton graph of a typical dual order yield point support.
Like or corresponding reference characters indicate like or corresponding parts throughout the several views.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the embodiments and the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be understood that the terms "comprises/comprising," "consists of … …," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product, apparatus, process, or method as desired. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …," and the like, does not exclude the presence of other like elements in a product, apparatus, process, or method that includes the element.
It is further understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present invention and to simplify the description, and do not indicate or imply that the devices, components, or structures referred to must have a particular orientation, be configured or operated in a particular orientation, and are not to be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In recent years, partial scholars begin to develop a staged yielding buckling restrained brace, and a part of the buckling restrained brace firstly yields and consumes energy in small earthquakes, and a large part of the buckling restrained brace in medium earthquakes or large earthquakes yields and consumes energy in large areas, so that the energy consumption capacity of the buckling restrained brace for resisting earthquakes with different intensities is effectively improved.
The buckling restrained brace with the double yield points is a novel brace with double yield stages, and is provided with two energy consumption sections, different energy consumption sections are sequentially subjected to staged yielding under small deformation and large deformation according to different earthquake responses, and the rigidity and the energy consumption capacity of the two-stage brace are fully utilized.
At present, a series-connection type buckling restrained brace with double yield points generally adopts a straight-line energy-consumption core material and a slotted hole deformation limiting device to realize a mechanism with double yield points. The small core material and the large core material are stressed together in the first yielding stage, so that energy is mainly consumed by the small core material, when the small core material is deformed to a preset value, the constraint condition is formed by the oblong hole limiting device, so that the small core board exits from energy-consuming work, and the large core material starts to consume energy mainly, thereby achieving the purpose of double yielding points. However, it is worth noting that the serial buckling restrained brace adopting the method adopts a slotted hole and a bolt mechanism, because the shear bearing capacity of the bolts is lower, a large amount of high-strength bolts are required to meet the shear capacity when the requirement on the tonnage of the brace is higher, and extremely high processing precision is required to meet the requirement on stress while the bolts are clustered, so that the overall cost of the buckling restrained brace is higher. On the other hand, the force transmission mechanism is complex when the core material is deformed and the bolt group is stressed simultaneously, and the cooperative stress is difficult.
The invention provides a series-type buckling restrained brace with double yield points, which aims to remarkably improve the bearing capacity and the energy consumption capacity of a buckling restrained device and reduce the manufacturing cost and the construction difficulty. The novel support adopts the scheme that the energy-consumption core material and the shear key are combined, the core materials of the first energy-consumption section and the second energy-consumption section have different sections so that the rigidity and the yield force are different, the novel support has two energy-consumption sections, different energy-consumption sections can be sequentially and gradually yield under small deformation and large deformation according to the difference of earthquake response, the rigidity and the energy-consumption capability of the two-stage support are fully utilized, the defect of the bearing capability of the traditional double-yield-point buckling constraint device is overcome, the requirement of large tonnage can be met, the manufacturing cost is saved, and the application range of the double-yield-point constraint support is promoted.
It will be readily appreciated that the threshold of the dual yield point of the present invention may be adjusted according to engineering requirements, ranging from after the core material of the first yield stage yields to before the core material of the second yield stage yields.
The implementation of the present invention will be described in detail with reference to the preferred embodiments.
Referring to fig. 1 to 13, the present invention proposes a tandem double-yield-point buckling restrained brace, comprising a first yield section 1 and a second yield section 2, the first yield section 1 and the second yield section 2 being butt-jointed and fixed, for example by welding or bolting. Preferably, the first yielding section 1 and the second yielding section 2 are in butt welding connection through an end plate 3.
In the invention, the first yielding section 1 performs yielding energy consumption under small or medium earthquake, and the second yielding section 2 performs yielding energy consumption under large or rare earthquake after the first yielding section 1 exits from working. The first yielding section 1 and the second yielding section 2 consume energy independently, so that energy consumption efficiency can be improved, steel waste caused by unified design according to large energy consumption sections in common energy consumption design is reduced, consumable cost is reduced, and deformation amplitude values under different earthquake levels are met while the energy consumption sections are guaranteed to be effectively consumed in steps.
Specifically, referring to fig. 3 and 7, the first yielding section 1 includes a first outer sleeve 101, a first yielding section core material 102 and constraint concrete 103 (203), wherein a plurality of shear grooves 1011 are formed on the first outer sleeve 101 along a circumferential direction, the first yielding section core material 102 is longitudinally penetrating and disposed in the first outer sleeve 101, and a plurality of radially outward protruding shear keys 1021 are disposed on the first yielding section core material 102 corresponding to the positions of the plurality of shear grooves 1011, so as to form reliable shear parts in cooperation with the insertion into the plurality of shear grooves 1011, and the constraint concrete 103 (203) is filled between the first outer sleeve 101 and the first yielding section core material 102.
The first outer sleeve 101 is used for providing lateral constraint for the first yielding section core material 102 and the constraint concrete 103 (203), the first yielding section core material 102 and the constraint concrete 103 (203) are subjected to yield energy consumption as a whole, and the purpose of the shearing resistant part is mainly to enable the stress of the first yielding section 1 to be singly born from the core material to be mainly born by the outer sleeve after the target displacement is achieved, so that the rigidity of the first yielding section is improved after the target displacement is achieved, and the second yielding section consumes energy.
It should be understood that the target displacement herein refers to the maximum displacement of the yielding movement of the first yielding segment core material 102 after the energy consumption, or the yielding displacement generated by the first yielding segment core material 102 after the energy consumption causes the shear key 1021 to deform in response to the integral support when contacting the shear groove 1011. This can be further appreciated by reference to fig. 14, where fig. 14 is a skeleton plot of a typical dual-order yield point support, with displacement in the horizontal direction and load in the vertical direction. In the figure, K1 is first-order rigidity (corresponding to the rigidity of the buckling restrained brace before the operation of the shear key) and K2 is second-order rigidity (corresponding to the rigidity of the buckling restrained brace after the operation of the shear key); f (F) 1 For the first yield segment core material yield load, F 2 A second yield segment core material yield load; delta y1 is deformation of the buckling restrained brace when the first yielding section core material yields, delta y2 is deformation of the buckling restrained brace when the second yielding section core material yields, and Delta a2 can be regarded as target displacement, namely deformation of the buckling restrained brace when the shear key contacts with the shear groove after the first yielding section core material generates certain yielding deformation. It should be noted that the target displacement Δa2 may be adjustable, and may be determined according to engineering requirements, for example, a supporting deformation value of a major shock may be taken.
Referring to fig. 4, the second yield segment 2 includes a second outer sleeve 201, a second yield segment core material 202, and a constraint concrete 203 (103), the second yield segment core material 202 being disposed longitudinally through the second outer sleeve 201, the constraint concrete 203 (103) being filled between the second outer sleeve 201 and the second yield segment core material 202.
The second outer sleeve 201 is used to provide lateral restraint to the second yield segment core 202 and the restraining concrete 203 (103), the second yield segment core 202 and the restraining concrete 203 (103) as a whole undergo two-stage large or rare earthquake yield energy consumption.
In some embodiments, first outer sleeve 101 is a circular sleeve as shown in (a) of fig. 5, or a square sleeve as shown in (b) of fig. 5, or other rectangular sleeve. The invention is here preferably a circular sleeve.
The second outer sleeve 201 may also be a circular, square or other rectangular sleeve as shown in fig. 6. The invention herein is preferably a square sleeve.
In the invention, when the support starts to be stressed, firstly, the first outer sleeve 101 of the first yielding section 1 is in an elastic stage, the first outer sleeve 101 is not stressed by axial force before the first yielding section core material 102 reaches preset displacement, and the first yielding section core material 102 bears axial force and plays a role in restraining concrete after reaching preset force, and the second outer sleeve 201 of the second energy consumption section 2 mainly acts as a function of restraining concrete and does not bear axial force. Based on this, the thickness of the wall of the first outer sleeve 101 is large and the thickness of the wall of the second outer sleeve 201 is relatively small.
Referring to fig. 7, the shear groove 1011 is a groove penetrating the outer wall of the first outer sleeve 101 in a long shape, and the plurality of shear grooves 1011 are uniformly arranged along the longitudinal axis direction of the first outer sleeve 101.
It should be appreciated that the plurality of shear slots 1011 may be disposed circumferentially around the first outer sleeve 101 in one revolution or may be disposed in a plurality of revolutions depending upon the in situ support stress conditions.
According to the invention, a trigger mechanism is realized by a mode that the shear groove 1011 designed on the first outer sleeve 101 is matched with the shear key 1021 designed on the first yield section core material 102 to form a shear part, namely, the protruding part of the core material contacts the edge of the opening of the outer sleeve, so that the outer sleeve is a mechanism of a main stress member. The shearing resistant part has higher bearing capacity, overcomes the defect of the bearing capacity of the existing buckling restrained brace, can meet the requirement of large tonnage, saves the manufacturing cost and improves the application range of the double yield point restrained brace.
With continued reference to fig. 7 (a), first outer sleeve 101 includes two semicircular sheets of steel, preferably arcuate steel, which are butt welded to form a circular sleeve as shown in fig. 7 (b).
The reason for this design is that the shear key 1021 is protruding from the first yielding section core material 102, and the section of the first yielding section core material 102 of the protruding shear key 1021 is larger than the outer diameter of the first outer sleeve 101, so that the first yielding section core material 102 cannot directly penetrate into the first outer sleeve 101, and therefore, the processing mode of welding the wall of the outer sleeve is considered to form a shear part.
The second outer sleeve 201 may be formed by butt welding or integrally cast of two semi-circular or U-shaped plates.
Referring to fig. 8 and 9, shear key 1021 is a rectangular core material having a first yield segment core material 102 extending outwardly from shear groove 1011 of first outer sleeve 101. The insertion length of the shear key 1021 is smaller than the length of the longitudinal notch of the shear groove 1011 into which the shear key 1021 is required to be inserted, so that a certain deformation gap 104 is reserved at two sides of the shear groove 1011 along the rear edge of the shear groove 1021, the deformation gap 104 is reserved, namely the shear key is not contacted under small displacement, and when the core material 102 of the first yielding section is deformed to a certain extent, the shear key is contacted with the outer wall to stress the first outer sleeve 101.
In some embodiments, the first yield segment core 102 is rectilinear in cross-section or cross-shaped as shown in fig. 10 (b). This facilitates increasing the contact area with the filled confined concrete 103 (203), enhancing the adhesion of the first yield segment core material 102 to the confined concrete 103 (203), further improving the overall energy dissipation capability.
The present invention will be described in detail with reference to the case of welding the cross-shaped first yield segment core material 102. Referring specifically to fig. 10, a cross-shaped first yield segment core 102 is formed from a single main yield segment core with two stiffening plates welded vertically along both sides thereof.
The (a) in fig. 10 includes three plates from top to bottom, the first plate is a core material of a main yielding section, the first plate is formed by butt welding two rectangular plates with different cross sections and chamfering the two butt joint sides, and two shear keys 1021 are correspondingly arranged on the two sides of the rectangular plate with a small cross section and are used for being matched with the shear grooves 1011 on the first outer sleeve 101. The second and third plates in fig. 10 (a) are stiffening plates, which are half of the cross section of the core material of the main yield section, and are welded perpendicularly to the two sides of the middle of the core material of the main yield section, so as to form a cross-shaped core material 102 of the first yield section as shown in fig. 10 (b).
In some embodiments, the second yield segment core 202 is cross-shaped or I-shaped as shown in FIG. 11 (a), or king-shaped as shown in FIG. 11 (b). The cross-sectional shape of the second yield segment core 202 within the second outer sleeve 201 is shown in figure 12. The yield core material with cross-shaped, I-shaped or king-shaped cross section is more stable in stress and higher in load bearing capacity.
Since the second yield segment core 202 is energy consuming for the second stage, the second yield segment core 202 is required to bear higher load and energy consumption, and therefore the second yield segment core 202 has a stiffness greater than that of the first yield segment core 102, its cross-sectional shape is designed in a cross, i-shape or king-shape, and the cross-sectional dimension of the second yield segment core 202 is designed to be greater than that of the first yield segment core 102.
The second yield segment core 202 is relatively large in cross section and has a stiffness less than the first outer sleeve 101 of the first yield segment 1. The first outer sleeve 101 is stressed because the shear work when the first yield segment core 102 reaches a certain displacement. The stiffness of second yield segment core 202 needs to be less than or even much less than the stiffness of first outer sleeve 101, otherwise major deformation will occur on first outer sleeve 101, such that second yield segment core 202 deforms less and consumes less energy. Thus, when the shear key works, the core material of the first yielding section is withdrawn from the working space and is forced by the outer sleeve to the second yielding section.
It will be readily appreciated that since the second yield segment core 202 has a larger cross-sectional dimension than the first yield segment core 102, then naturally the second outer sleeve 201 has an inner barrel diameter dimension that is larger than the first outer sleeve 101 in order to accommodate the second yield segment core 202 and the first yield segment core 102, respectively.
The present invention will be described in detail with reference to the case of welding the i-shaped second yield segment core material 202. Referring specifically to fig. 13, an i-shaped second yield segment core 202 is formed by welding a web, two flange plates, and two end stiffeners.
The (a) in fig. 13 includes four plates from top to bottom, the first plate is a web, the web is a rectangular plate, the second plate is a flange plate, and the two rectangular plates with different cross sections are welded in a butt joint manner and are chamfered along two opposite sides of the butt joint. The flange plates are provided with two plates which are vertically welded on two sides of the web plate to integrally form an I-shaped steel type, the third plate and the fourth plate are end stiffening plates which are long trapezoid plates, the length of each trapezoid plate is consistent with that of a rectangular plate with a large section, the flange plates are vertically welded on two sides of the rectangular plate with the large section and are used for enhancing the rigidity of one side of the rectangular plate with the large section, and the I-shaped second yield section core material 202 shown in (b) in fig. 13 is integrally formed.
The invention can adjust the size and the section form of the core material according to the requirement, and control the time for the first yielding section 1 and the second yielding section 2 to enter into yielding.
The first yield section core material has smaller section and smaller rigidity, and is larger in deformation relative to the second yield section when stressed, and the second yield section core material has smaller deformation, so that the first yield section consumes energy firstly, the second yield section core material is a main deformation section after the shear key of the first yield section works, and the second yield section can possibly enter the yield energy consumption.
According to the invention, different performance parameters can be set by changing the cross section sizes of the first outer sleeve 101 and the second outer sleeve 201 and the cross section forms of the first yielding section core material 102 and the second yielding section core material 202, so that the yielding points and the rigidities of the two stages can be flexibly controlled, the deformation distribution can be flexibly adjusted according to the deformation of the weak layers with different structures, the floor yielding mechanism of the structure is migrated, the problems of concentrated deformation and uneven damage of the weak layers are finally controlled, the reasonable deformation coordination target of the structure is realized, and the aim of cooperative energy consumption of all floors is fulfilled.
With continued reference to fig. 2, first yield segment core 102 includes a first energy dissipating portion 102a and a first connecting portion 102b, first energy dissipating portion 102a being disposed within first outer sleeve 101, first energy dissipating portion 102a being disposed concentric with first outer sleeve 101, first connecting portion 102b being disposed outside first outer sleeve 101 along an end of first energy dissipating portion 102a remote from second yield segment core 202.
The cross-sectional shapes of the first energy dissipation portion 102a and the first connection portion 102b are the same, and are cross-shaped, so that the first energy dissipation portion 102a and the first connection portion 102b are convenient to integrally design and form, and the cross-sectional size of the first connection portion 102b is larger than that of the first energy dissipation portion 102a, so that the first energy dissipation portion and other external building components can be stably connected.
Similarly, the second yielding segment core 202 includes a second energy dissipation portion 202a and a second connection portion 202b, the second energy dissipation portion 202a is disposed in the second outer sleeve 201, the second energy dissipation portion 202a is disposed concentrically with the second outer sleeve 201, and the second connection portion 202b is disposed outside the second outer sleeve 201 along an end of the second energy dissipation portion 202a away from the first yielding segment core 102.
The second energy dissipation portion 202a and the second connection portion 202b have the same cross-sectional shape, are both I-shaped, and are convenient for integrally designing and forming, and the cross-sectional size of the second connection portion 202b is larger than that of the second energy dissipation portion 202a so as to be convenient for stable connection with other external building components.
Of course, to increase the strength of the connection of the second connection 202b to other building elements, one can provide end stiffeners along both sides of the second connection 202 b.
In some embodiments, one end of the first yield segment core material is welded with an end plate, and the first yield segment core material is welded and fixed with the corresponding second yield segment core material through the end plate; or the core material and the outer sleeve of the first yielding section are welded with the end plate, and the core material and the outer sleeve of the second yielding section are also welded with the end plate. The end plates may be identical or two different end plates may be welded together.
Preferably, referring to fig. 2 and (b) of fig. 10, a first end plate 301 is welded to the first end plate 102 along an end near the second end core 202, the cross-sectional shape of the first end plate 301 is identical to that of the first outer sleeve 101, and is circular, the cross-sectional size of the first end plate 301 is not smaller than that of the inner cylinder of the first outer sleeve 101, and the cross-sectional size of the first end plate 301 is preferably identical to that of the inner cylinder of the first outer sleeve 101, so that the processing and welding are facilitated.
Further, the end portion of the first outer sleeve 101 corresponding to the first end plate 301 is welded and fixed with the first end plate 301, so that the first outer sleeve 101 and the first yielding section core material 102 are welded into a whole through the first end plate 301, the overall stability of the first yielding section 1 is enhanced, and the overall bearing capacity is improved.
With continued reference to fig. 2 and (b) of fig. 13, the second end plate 302 is welded to the second end plate 202 along an end near the first end plate 102, the cross-sectional shape of the second end plate 302 is identical to that of the second outer sleeve 201, and is square, the cross-sectional size of the second end plate 302 is not smaller than the inner cylinder diameter size of the second outer sleeve 201, and the cross-sectional size of the second end plate 302 is preferably identical to the inner cylinder diameter size of the second outer sleeve 201, so that the second end plate is convenient to process and weld, and the whole is more attractive.
Further, the end portion of the second outer sleeve 201 corresponding to the second end plate 302 is welded and fixed with the second end plate 301, so that the second outer sleeve 201 and the second yielding section core material 202 are welded into a whole through the second end plate 302, the overall stability of the second yielding section 2 is enhanced, and the overall bearing capacity is improved.
In some embodiments, referring to fig. 2, the first and second yield segments 1, 2 are butt welded together by their respective welded first and second end plates 301, 302.
In the invention, the first end plate 301 is welded and fixed with the first outer sleeve 101 and the first yielding section core material 102 at the same time, and the second end plate 302 is welded and fixed with the second outer sleeve 201 and the second yielding section core material 202 at the same time, so that the butt welding and fixing of the first end plate 301 and the second end plate 302 can enhance the whole welding strength of the first yielding section 1 and the second yielding section 2.
When the tandem double-yield-point buckling restrained brace works, deformation is concentrated on a small core material (a first yield-point core material) of a first yield point at first in an elastic stage, deformation of a large core material (a second yield-point core material) of a second yield point is smaller, deformation is further increased, energy consumption begins to be conducted on the first yield point after the small core material enters plastic deformation, the small core material is enabled to exit from working and is converted into outer sleeve stress through a shear key mechanism after control displacement is achieved, the second yield point is achieved, and finally, when the large displacement deformation is achieved, the large core material of the second yield point begins to yield and consume energy, and finally, the purpose of double yield points is achieved.
It is easy to understand that a single yield point is difficult to adapt to the requirements brought by seismic intensity change, and after yield, the rigidity is small, so that the deformation is easy to concentrate, the residual deformation is large, the limit deformation is small, and the large earthquake or the ultra-large earthquake is easy to break. The double yield points can improve the rigidity, bearing capacity, energy consumption capacity and collapse resistance of the structure after yielding after the structure enters a major shock or an ultra-major shock.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
While several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the invention. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.
Claims (11)
1. A tandem dual yield point buckling restrained brace, comprising:
the outer sleeve comprises a first outer sleeve and a second outer sleeve, a plurality of shearing resistant grooves are uniformly formed in the first outer sleeve along the circumferential direction, and the shearing resistant grooves are distributed along the longitudinal axis direction of the first outer sleeve;
the yielding inner core comprises a first yielding section core material and a second yielding section core material, the first yielding section core material is arranged in the first outer sleeve, the second yielding section core material is arranged in the second outer sleeve, and a plurality of shear keys are radially arranged on the first yielding section core material and used for being inserted into a plurality of shear grooves;
the confined concrete is filled in the first outer sleeve and the second outer sleeve; and is also provided with
The first yielding section core material is fixedly connected with the second yielding section core material in a butt joint mode, the first outer sleeve and the first yielding section core material form a first yielding section, the second outer sleeve and the second yielding section core material form a second yielding section, and the rigidity of the first yielding section core material is smaller than that of the second yielding section core material, so that the first yielding section consumes energy in a first stage, and the second yielding section consumes energy in a second stage when the shear key reaches preset displacement in the shear groove.
2. The tandem double yield point buckling restrained brace of claim 1, wherein the first outer sleeve is formed from two semicircular plates joined by butt welding.
3. The tandem double yield point buckling restrained brace of claim 1, wherein the first yield section core material comprises a first energy dissipating portion and a first connecting portion, the first energy dissipating portion being disposed within the first outer sleeve, the first connecting portion being disposed outside the first outer sleeve along an end of the first energy dissipating portion remote from the second yield section core material; and/or
The second yielding section core material comprises a second energy consumption part and a second connecting part, the second energy consumption part is arranged in the second outer sleeve, and the second connecting part is arranged outside the second outer sleeve along one end, away from the first yielding section core material, of the second energy consumption part.
4. The tandem double yield point buckling restrained brace of claim 1, wherein the first yield segment core material is either straight or cross-shaped in cross section.
5. The tandem dual yield point buckling restrained brace of claim 1, wherein the cross section of the second yield segment core material is cross-shaped, i-shaped or king-shaped, and the cross-sectional dimension of the second yield segment core material is greater than the first yield segment core material.
6. The tandem dual yield point buckling restrained brace of claim 1, wherein the length of the shear key is less than the length of the notch of the shear groove, and a deformation gap is reserved between the shear key and the notch of the shear groove.
7. The tandem double yield point buckling restrained brace of any of claims 1-6, wherein one end of the first yield segment core material is welded with an end plate, the first yield segment core material is welded with the corresponding second yield segment core material through the end plate; or one end of the first yielding section core material is welded with a first end plate, one end of the second yielding section core material corresponding to the first yielding section core material is welded with a second end plate, and the first end plate and the second end plate are in butt welding or bolting fixation.
8. The tandem double yield point buckling restrained brace of claim 7, wherein the end plates are welded along both sides thereof to the first outer sleeve and the second outer sleeve, respectively.
9. The tandem double yield point buckling restrained brace of claim 7, wherein the first end plate is welded to the end of the first outer sleeve, and the cross-sectional dimension of the first end plate is not less than the inner barrel diameter dimension of the first outer sleeve; and/or
The second end plate is welded with the end part of the second outer sleeve, and the cross section size of the second end plate is not smaller than the inner cylinder diameter size of the second outer sleeve.
10. The tandem double yield point buckling restrained brace of any of claims 1-6, wherein the inner cylinder diameter dimension of the first outer sleeve is smaller than the inner cylinder diameter dimension of the second outer sleeve.
11. The tandem double yield point buckling restrained brace of any of claims 1-6, wherein the stiffness of the second yield segment core material is less than the stiffness of the first outer sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311588044.6A CN117286943A (en) | 2023-11-27 | 2023-11-27 | Series-type buckling restrained brace with double yield points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311588044.6A CN117286943A (en) | 2023-11-27 | 2023-11-27 | Series-type buckling restrained brace with double yield points |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117286943A true CN117286943A (en) | 2023-12-26 |
Family
ID=89244859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311588044.6A Pending CN117286943A (en) | 2023-11-27 | 2023-11-27 | Series-type buckling restrained brace with double yield points |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117286943A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140039385A (en) * | 2012-09-20 | 2014-04-02 | 주식회사 포스코 | Coupling structure and method for beam to column connection |
| KR20170014540A (en) * | 2015-07-30 | 2017-02-08 | 부산대학교 산학협력단 | Buckling Restraint Brace with assembly type steel restraint material |
| CN109629896A (en) * | 2018-12-28 | 2019-04-16 | 云南震安减震科技股份有限公司 | A kind of double buckling-restrained energy dissipation braces of surrender of combined type |
| US20200011051A1 (en) * | 2017-07-25 | 2020-01-09 | Shandong University | Buckling-restrained brace with flat energy dissipation element, building and assembly method |
| CN111663673A (en) * | 2020-07-01 | 2020-09-15 | 上海市建筑科学研究院有限公司 | Rotary amplification type energy consumption self-resetting support |
| CN212956973U (en) * | 2020-04-21 | 2021-04-13 | 中国建筑技术集团有限公司 | Full-assembly type buckling-restrained brace |
| CN114016791A (en) * | 2021-07-28 | 2022-02-08 | 北京市建筑设计研究院有限公司 | Metal friction double-yield-point composite energy dissipation support |
| CN216640924U (en) * | 2022-04-24 | 2022-05-31 | 北京堡瑞思减震科技有限公司 | Double-step yielding buckling restrained brace |
| CN115030343A (en) * | 2022-06-02 | 2022-09-09 | 羿射旭减隔震张家口有限公司 | Double-stage buckling restrained brace damper |
| CN115263018A (en) * | 2022-08-19 | 2022-11-01 | 北京工业大学 | Multistage-reset multistage-energy-consumption buckling-restrained brace |
| CN116044033A (en) * | 2022-08-25 | 2023-05-02 | 山东天元建设机械有限公司 | Novel buckling restrained brace with double-order yield |
| CN117005570A (en) * | 2023-08-09 | 2023-11-07 | 河北铭泰震安减隔震器材有限公司 | Buckling restrained brace with double-stage yielding |
-
2023
- 2023-11-27 CN CN202311588044.6A patent/CN117286943A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140039385A (en) * | 2012-09-20 | 2014-04-02 | 주식회사 포스코 | Coupling structure and method for beam to column connection |
| KR20170014540A (en) * | 2015-07-30 | 2017-02-08 | 부산대학교 산학협력단 | Buckling Restraint Brace with assembly type steel restraint material |
| US20200011051A1 (en) * | 2017-07-25 | 2020-01-09 | Shandong University | Buckling-restrained brace with flat energy dissipation element, building and assembly method |
| CN109629896A (en) * | 2018-12-28 | 2019-04-16 | 云南震安减震科技股份有限公司 | A kind of double buckling-restrained energy dissipation braces of surrender of combined type |
| CN212956973U (en) * | 2020-04-21 | 2021-04-13 | 中国建筑技术集团有限公司 | Full-assembly type buckling-restrained brace |
| CN111663673A (en) * | 2020-07-01 | 2020-09-15 | 上海市建筑科学研究院有限公司 | Rotary amplification type energy consumption self-resetting support |
| CN114016791A (en) * | 2021-07-28 | 2022-02-08 | 北京市建筑设计研究院有限公司 | Metal friction double-yield-point composite energy dissipation support |
| CN216640924U (en) * | 2022-04-24 | 2022-05-31 | 北京堡瑞思减震科技有限公司 | Double-step yielding buckling restrained brace |
| CN115030343A (en) * | 2022-06-02 | 2022-09-09 | 羿射旭减隔震张家口有限公司 | Double-stage buckling restrained brace damper |
| CN115263018A (en) * | 2022-08-19 | 2022-11-01 | 北京工业大学 | Multistage-reset multistage-energy-consumption buckling-restrained brace |
| CN116044033A (en) * | 2022-08-25 | 2023-05-02 | 山东天元建设机械有限公司 | Novel buckling restrained brace with double-order yield |
| CN117005570A (en) * | 2023-08-09 | 2023-11-07 | 河北铭泰震安减隔震器材有限公司 | Buckling restrained brace with double-stage yielding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3299528B1 (en) | Assembly type steel pipe casing reinforced concrete combined joint and mounting method | |
| CN107675800B (en) | Self-resetting deformation coordination floor slab node structure | |
| CN105780960A (en) | Fully-prefabricated assembled concrete column-concrete beam buckling-restrained energy-consuming joint | |
| CN107989180B (en) | Eccentric supporting frame | |
| JP2009249917A (en) | Corrugated steel plate earthquake-resisting wall | |
| CN205637214U (en) | Prefabricated assembled concrete column - concrete beam prevents bucking power consumption node entirely | |
| CN103711228B (en) | Assembling energy-dissipation structure system cut by a kind of combination slot line frame | |
| CN108360745B (en) | Assembled double-energy-consumption recoverable square concrete filled steel tube combination column and installation method thereof | |
| JP2013213390A (en) | Compressive buckling stiffening structure | |
| CN110924566A (en) | Steel frame infilled CLT plate constraint steel plate shear wall combined structure | |
| CN117286943A (en) | Series-type buckling restrained brace with double yield points | |
| CN212506791U (en) | Anti-collapse beam column node of stepped external steel frame | |
| CN203684436U (en) | Combined corrugation frame-shear assembly energy dissipation structural system | |
| JP2010276080A (en) | Energy absorbing member and structure in which the energy absorbing member is installed | |
| CN116005796A (en) | Semi-rigid steel frame beam column node based on buckling-restrained angle steel | |
| CN114809277A (en) | Assembled is from dual power consumption node of restoring to throne prestressed concrete frame | |
| JP6268998B2 (en) | End structure of steel member | |
| CN220504146U (en) | Steel column and I-steel beam connecting node | |
| KR101732724B1 (en) | Hybrid PEB having tube-type flanges | |
| CN116065695B (en) | Assembled steel beam column structure of full cycle hierarchical power consumption | |
| KR20130039476A (en) | Stiffener and structure for fixing stiffener | |
| CN219011596U (en) | Assembled corrugated steel plate concrete composite shear wall | |
| CN220469475U (en) | Beam column node reinforcing device | |
| CN212358720U (en) | Connection structure of prefabricated wallboard and assembled steel frame structure roof beam | |
| CN220377511U (en) | Rigidity-adjustable steel beam connecting node |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |