CN110593630B - Novel self-balancing type multi-stage energy-consumption buckling-restrained brace and manufacturing process - Google Patents
Novel self-balancing type multi-stage energy-consumption buckling-restrained brace and manufacturing process Download PDFInfo
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- CN110593630B CN110593630B CN201910884512.1A CN201910884512A CN110593630B CN 110593630 B CN110593630 B CN 110593630B CN 201910884512 A CN201910884512 A CN 201910884512A CN 110593630 B CN110593630 B CN 110593630B
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000011162 core material Substances 0.000 claims abstract description 86
- 239000000306 component Substances 0.000 claims description 53
- 230000007704 transition Effects 0.000 claims description 34
- 238000003466 welding Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000005488 sandblasting Methods 0.000 claims description 6
- 239000003351 stiffener Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000008358 core component Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000000452 restraining effect Effects 0.000 description 5
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
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- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- 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
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The utility model provides a novel self-balancing multistage power consumption buckling restrained brace, includes core, sleeve pipe, first stiffening plate subassembly, second stiffening plate subassembly, first buckling preventing board, second buckling preventing board, connecting piece, connecting plate and apron, the core includes non-yielding section, third yielding section, second yielding section and first yielding section, and first yielding section is located the middle part of core, and the both sides of first yielding section set up second yielding section, third yielding section and non-yielding section respectively; the first stiffening plate assembly, the second stiffening plate assembly, the first buckling-preventing plate and the second buckling-preventing plate are connected inside the sleeve, and then the constraint device for forming the core material is installed through the connecting piece and the connecting plate; the core material is located inside the restraint device, and the apron is located the sheathed tube both ends and be connected with the sleeve pipe. And provides a manufacturing process of the novel self-balancing multi-stage energy-consumption buckling restrained brace. The invention has the advantages of uniform energy consumption, good ductility, excellent energy consumption, multi-stage energy consumption and slower rigidity degradation after buckling.
Description
Technical Field
The invention belongs to the technical field of vibration reduction of building structure engineering and bridge engineering structures, and particularly relates to a novel self-balancing multi-stage energy-consumption buckling restrained brace and a manufacturing process thereof.
Background
Earthquake is one of main natural disasters threatening the life and property safety of human beings, and besides the direct damage such as house collapse and casualties, the earthquake can also cause secondary disasters such as fire disasters, diseases and the like, so that huge economic loss is caused. Buckling restrained braces have been widely used as an excellent energy-dissipating damper in the united states, japan, china, and the like. When the structure adopting the buckling-restrained energy-dissipation brace is subjected to power load such as earthquake, the peripheral constraint unit can ensure that the inner core stress unit can reach a full-section yielding state when being pressed, and the energy dissipation effect is achieved through yielding hysteresis, so that the function of a structural fuse is achieved, and the life safety and property safety of people are well protected.
The traditional buckling restrained brace is designed according to most earthquakes, fortifying earthquakes and rare earthquakes, and has certain limitation. According to the design of the earthquake: the buckling restrained brace is required to enter an energy consumption stage when a plurality of earthquakes occur, namely, the whole core material of the brace enters an elastoplastic stage, and plastic deformation cannot be recovered, so that the buckling restrained brace is suitable for replacement after the plurality of earthquakes; when fortifying earthquake and rare earthquake occur, the axial displacement of the support is close to or even exceeds the limit axial deformation of the core material, the fatigue damage phenomenon occurs under the action of earthquake load, the performance requirement on steel is higher, the support design difficulty is high, and the cost is higher. Designing according to fortification earthquake or rare earthquake: the buckling restrained brace can play a role in energy dissipation and shock absorption under the effects of fortifying earthquake and rarely-encountered earthquake loads, and protects the safety of the structure, but under the effects of frequent earthquake and typhoon, the buckling restrained brace does not consume energy, the core material is always in an elastic stage, the buckling restrained brace does not provide additional damping ratio for the structure, only plays a role in supporting, and is difficult to firstly yield and dissipate energy before a concrete member cracks.
In recent years, domestic and foreign specialists have studied about the problems, and proposed various concepts, design methods, and the like of multi-stage buckling restrained brace, but have some problems. (1) The weaker yielding section in the buckling restrained brace enters energy consumption under the action of small shock and typhoon, and the stronger yielding section is in an elastic stage; under the condition of fortifying earthquake and rare earthquake, the weaker yielding section in the buckling restrained brace can still displace, energy consumption is continued, if the stronger yielding section reaches the limit stress, fatigue damage occurs to the weaker yielding section, and the stress of the stronger yielding section needs to be strictly controlled during design, so that the performance utilization rate of the material is lower, a certain potential safety hazard exists, and engineering application is not facilitated. (2) The weaker yield section of the buckling restrained brace is not sufficiently constrained, and the weaker yield section is prone to out-of-plane instability, which greatly affects the energy consumption performance of the brace and the safety of the brace.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a novel self-balancing multi-stage energy-consumption buckling restrained brace and a manufacturing process, which can be widely applied to the technical fields of building house structures, bridges, non-structural members and the like, and have the characteristics of uniform energy consumption, good ductility, excellent energy consumption, multi-stage energy consumption and slower rigidity degradation after buckling.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a novel self-balancing multistage power consumption buckling restrained brace, includes core, sleeve pipe, first stiffening plate subassembly, second stiffening plate subassembly, first buckling preventing board, second buckling preventing board, connecting piece, connecting plate and apron, the core includes non-yielding section, third yielding section, second yielding section and first yielding section, first yielding section is located the middle part of core, and the both sides of first yielding section set up second yielding section, third yielding section and non-yielding section respectively; the first stiffening plate assembly, the second stiffening plate assembly, the first buckling-preventing plate and the second buckling-preventing plate are connected inside the sleeve, and then the constraint device of the core material is formed by installing a connecting piece and a connecting plate; the core material is positioned in the restraint device, and the cover plates are positioned at two ends of the sleeve and connected with the sleeve.
Further, the non-yielding section comprises a core material and end stiffening plates, wherein the end stiffening plates are arranged at two ends of the core material and are vertically arranged with the core material plates.
Preferably, the core material is soft steel or common steel, but the elongation rate is more than 30%, and the strength-to-deflection ratio is more than 1.2;
preferably, the elastic limit bearing capacity of the non-yielding section should be greater than the limit bearing capacity of the third yielding section;
preferably, the end stiffening plates are made of the same material as the core material, and can also be made of steel with higher strength;
still further, the third yielding section and the second yielding section are connected in a gradient transition mode to form a transition section, and the second yielding section and the first yielding section are connected in a gradient transition mode to form a transition section.
Preferably, the slope between said third yielding section and said second yielding section should not be greater than 0.5, preferably between 0.25 and 0.5, and the slope between said second yielding section and said first yielding section should not be greater than 0.5, preferably between 0.25 and 0.5;
the cross-sectional areas of the third yielding section, the second yielding section and the first yielding section are calculated and determined according to engineering requirements, but the area of the third yielding section is not more than 2 times of that of the second yielding section, preferably 1.1-1.8, and the area of the second yielding section is not more than 1.5 times of that of the first yielding section, preferably 1.1-1.5;
furthermore, the second limiting plate is disposed in the transition section between the third yielding section and the second yielding section, the width of the second limiting plate is the same as the width of the core material of the second yielding section, and the height of the second limiting plate should have enough contact surface with the first stiffening plate component or the second stiffening plate component, so that redundant load is transferred to the sleeve to perform self-balancing.
The first limiting plate is arranged in a transition section between the second yielding section and the first yielding section, the width of the first limiting plate is the same as that of the core material of the first yielding section, and a sufficient contact surface is arranged between the first stiffening plate assembly or the second stiffening plate assembly and the height direction of the first limiting plate, so that redundant load is transferred to the sleeve to perform self-balancing;
the stiffener spacing of the first stiffener assembly and the second stiffener assembly is less at the first yield segment than at the second yield segment and the second yield segment in order to ensure local stability and overall stability of the first yield segment.
Preferentially, the second limiting plate and the first limiting plate are made of the same material as the core material;
further, the sleeve comprises a half sleeve I, a half sleeve II and a connecting hole;
preferentially, a groove-shaped member is formed by welding preferentially on the first half sleeve and the second half sleeve, and a connecting hole matched with the connecting piece is formed preferentially on the groove;
preferentially, the first half sleeve and the second half sleeve are made of steel with the brand higher than the core material, and the cross section area of the first half sleeve and the second half sleeve should be more than 2.5 times of the area of the second yielding section;
further, the first stiffening plate component comprises a first middle limiting device and two first side limiting devices, and the second stiffening plate component comprises a second middle limiting device and two second side limiting devices;
the first middle limiting device comprises two stiffening plates, the second middle limiting device comprises two stiffening plates, and the two first limiting plates are respectively positioned between the stiffening plates of the first middle limiting device and between the stiffening plates of the first middle limiting device;
the first side limiting device comprises two stiffening plates, the second side limiting device comprises two second stiffening plates, and the two second limiting plates are respectively positioned between the stiffening plates of the first side limiting device and between the stiffening plates of the second side limiting device;
the distance between adjacent stiffening plates forming the first middle limiting device and the second middle limiting device is smaller than the distance between adjacent stiffening plates forming the first side limiting device and the second side limiting device.
Preferably, the height of the first stiffening plate component and the second stiffening plate component is the same as the height of the inner dimension of the first groove-type half sleeve or the second groove-type half sleeve, the width of the first stiffening plate component and the second stiffening plate component is the width of the inner dimension of the first groove-type half sleeve or the second groove-type half sleeve minus half of the thickness of the core material, and minus 1-2 mm, so that a certain gap is reserved between the core material and the first stiffening plate component or between the core material and the second stiffening plate component, and the installation and the supporting work are facilitated.
Further, the thickness of the first buckling preventing plate and the thickness of the second buckling preventing plate are half of the thickness of the core material plate, and the first buckling preventing plate and the second buckling preventing plate are respectively and vertically arranged at the middle edges of the flanges of the first groove-type half sleeve and the second groove-type half sleeve so as to ensure that the first yielding section is free from side bulging when being pressed.
Preferably, the first buckling preventing plate and the second buckling preventing plate are made of the same material as the sleeve.
Further, the connecting plate is provided with a connecting plate hole.
Preferably, the width of the connecting plate is the same as that of the sleeve, and the connecting plate is made of the same material as that of the sleeve.
Preferentially, the connecting plate holes on the connecting plate are in one-to-one correspondence with the connecting holes on the sleeve.
Further, the connecting piece preferably adopts a high-strength bolt, and can also be a rivet.
Preferably, the connecting piece connects the connecting plate and the sleeve into a whole through the connecting plate hole on the connecting plate and the connecting hole on the sleeve.
Further, the cover plate has the same size as the outer size of the end face of the sleeve.
Preferably, a cover plate hole is formed in the cover plate, so that the core material and the end stiffening plate penetrate through the cover plate.
Preferably, the size of the cover plate hole is slightly larger than the cross-sectional size of the non-yielding section by about 1-2 mm.
Preferably, the cover plate is connected to two ends of the sleeve by welding.
A manufacturing process of a novel self-balancing multi-stage energy-consumption buckling restrained brace, comprising the following steps:
(1) Preparing blanks and connecting pieces for processing core materials, sleeves, first stiffening plate assemblies, second stiffening plate assemblies, first anti-buckling plates, second anti-buckling plates, cover plates, second limiting plates, first limiting plates, end stiffening plates and connecting plates;
(2) Manufacturing a blank steel plate into a supported core plate in a cutting mode, wherein the core plate comprises a non-yielding section, a third yielding section, a second yielding section and a first yielding section, the cross-sectional areas of the non-yielding section and the third yielding section are the same, and the area of the second yielding section and the area of the first yielding section are calculated according to engineering requirements;
(3) Manufacturing a blank into four end limiting plates, a first limiting plate and an end stiffening plate in a cutting mode, wherein the end of the end stiffening plate is flush with the end of a core material, the other end of the end stiffening plate is made into a transition slope, the core material, the second limiting plate, the first limiting plate and the end stiffening plate are subjected to surface rust removal and sand blasting processes, the end stiffening plate is welded on two sides of a non-yielding section plate of the core material vertically in a welding mode, a cross section is formed with the core material, and the second limiting plate and the first limiting plate are welded on a transition part between a third yielding section and a second yielding section and a transition part between the second yielding section and the first yielding section respectively in a welding mode to form an internal core member;
(4) Completing two groove-shaped components, namely a half sleeve I and a half sleeve II, by using a cold bending mode, arranging connecting holes on the upper flange and the lower flange of the groove-shaped component, derusting and sandblasting the surfaces of the half sleeve I and the half sleeve II as well as the first stiffening plate component and the second stiffening plate component, and connecting the first stiffening plate component and the second stiffening plate component obtained by using a cutting mode into the half sleeve I and the half sleeve II by welding according to calculation requirements to form two constraint components;
(5) Installing two constraint components on the outer sides of the core components, tightly attaching the two constraint components, arranging connecting plates provided with connecting plate holes on the upper parts and the lower parts of the two constraint components, enabling the connecting plate holes to correspond to the connecting holes one by one, and connecting the two constraint components into a whole by using a connecting piece and the connecting plate;
(6) And respectively penetrating the cover plates provided with the cover plate holes through the two ends of the core member, connecting the cover plates with the two ends of the sleeve through welding, spraying fireproof paint and anticorrosive paint on the surfaces of the finished members, and manufacturing the novel self-balancing multi-stage energy-consumption buckling restrained brace.
The beneficial effects of the invention are mainly shown in the following steps:
(1) The structure is divided into a first yielding section, a second yielding section and a third yielding section, so that the requirement of energy consumption in stages can be met. Typhoon load or excess seismic event: the first yielding section enters a yielding stage, and the second yielding section and the third yielding section are in an elastic stage; fortifying earthquake: the first yielding section is in a yielding stage, the second yielding section enters a yielding stage, and the third yielding section is in an elastic stage; rare earthquakes: the first yield stage, the second yield stage, and the third yield stage all enter the yield stage.
(2) By arranging the first anti-buckling plate and the second anti-buckling plate, the first yielding section is ensured not to generate a compression side drum; the first stiffening plate component and the second stiffening plate component are arranged, so that the support core material is prevented from buckling in the plane and buckling out of the plane under the left and right of an external load; the first stiffening plate assembly and the second stiffening plate assembly are arranged on the weak first yielding section, so that buckling or fracture of the first yielding section under the action of external load can be avoided, and better energy consumption stability and safety of the support can be guaranteed.
(3) A first limiting plate and a second limiting plate are arranged in a transition section between the first yielding section and the second yielding section and a transition section between the second yielding section and the third yielding section, the limit displacement of the first yielding section and the limit displacement of the second yielding section, which are calculated according to engineering requirements, are arranged on two sides of the first limiting plate and the second limiting plate, the distance between the first stiffening rib and the second stiffening rib is arranged, and the limiting device formed by the first stiffening rib and the second stiffening rib can ensure that energy consumption is generated when the device is supported under typhoon or excessive earthquake, so that the structure is prevented from being damaged; after the earthquake is protected, the displacement of the first yielding section is limited by the limiting device, so that the first yielding section is prevented from being damaged due to the fact that the strain is beyond the limit displacement, the external load which can be born by the first yielding section is transmitted to the limiting device through the limiting plate, and then transmitted to the outer constraint device through the limiting device, and the self-balancing effect is achieved in the outer constraint device; after rare earthquakes are entered, the displacement of the first yielding section and the second yielding section is limited through the limiting device, the first yielding section and the second yielding section are prevented from being damaged due to the fact that the strain is not larger than the limit displacement, the external load born by the first yielding section and the second yielding section is transmitted to the limiting device through the limiting plate and then transmitted to the outer restraining device through the limiting device, and the self-balancing effect is achieved in the outer restraining device.
(4) The first half sleeve and the second half sleeve are arranged on the outer side of the union material through the connecting piece and the connecting plate, so that the union material is integrated, when the connecting piece is a bolt, after the inner core material is damaged, the core material can be replaced by unscrewing the bolt, and the union material has certain assembly performance.
(5) The buckling restrained brace has the advantages of simple process flow and higher economic performance in manufacturing, and facilitates replacement work of the buckling restrained brace after an earthquake.
Drawings
Fig. 1 is a schematic overall front view of a novel self-balancing multi-stage energy-dissipating buckling-restrained brace.
Fig. 2 is a schematic diagram of the front of a core material of the novel self-balancing multi-stage energy-consuming buckling restrained brace.
Fig. 3 is a front cross-sectional view of a novel self-balancing multi-stage energy-dissipating buckling-restrained brace.
Fig. 4 is a cross-sectional view taken along A-A of fig. 1.
Fig. 5 is a cross-sectional view taken along the direction B-B of fig. 1.
Fig. 6 is a cross-sectional view taken along the direction C-C of fig. 1.
Fig. 7 is a cross-sectional view of fig. 2 in one direction.
Fig. 8 is a cross-sectional view taken along the direction E-E of fig. 2.
Fig. 9 is a cross-sectional view taken along the direction F-F of fig. 2.
Fig. 10 is an exploded view of a novel self-balancing multi-stage energy-dissipating buckling-restrained brace.
Wherein 1 is a core material, 11 is a non-yielding section, 12 is a third yielding section, 13 is a second yielding section, 14 is a first yielding section, 15 is a second limiting plate, 16 is a first limiting plate, 2 is an end stiffening plate, 3 is a sleeve, 31 is a half sleeve, 32 is a half sleeve, 33 is a connecting hole, 41 is a first stiffening plate component, 42 is a second stiffening plate component, 411 is a first side limiting device, 412 is a first body middle limiting device, 421 is a second side limiting device, 422 is a second middle limiting device, 51 is a first anti-buckling plate, 52 is a second anti-buckling plate, 6 is a connecting piece, 7 is a connecting plate, 71 is a connecting plate hole, 8 is a cover plate hole, and 81 is a cover plate hole.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 10, a novel self-balancing multi-stage energy dissipation buckling restrained brace comprises a core material 1, an end stiffening plate 2, a sleeve 3, a half sleeve 31, a half sleeve 32, a connecting hole 33, a first stiffening plate component 41, a second stiffening plate component 42, a first lateral limiting device 411, a first middle limiting device 412, a second lateral limiting device 421, a second middle limiting device 422, a first buckling restrained plate 51, a second buckling restrained plate 52, a connecting piece 6, a connecting plate 7, a connecting plate hole 71, a cover plate 8 and a cover plate hole 81, wherein the core material 1 comprises a non-yielding section 11, a third yielding section 12, a second yielding section 13 and a first yielding section 14, the first yielding section 14 is positioned in the middle of the core material, and the second yielding section 13, the third yielding section 12 and the non-yielding section 11 are respectively arranged on two sides of the first yielding section 14; the first stiffening plate component 41, the second stiffening plate component 42, the first anti-buckling plate 51 and the second anti-buckling plate 52 are connected inside the sleeve, and then are installed through connecting pieces and connecting plates to form a constraint device of the core material; the core material 1 is positioned inside the restraint device, and the cover plates 8 are positioned at two ends of the sleeve 3 and are connected with the sleeve 3.
In the embodiment, the total length of the support is 5800mm, the core material adopts Q235B (the elongation rate is more than 30 percent, the strong bending ratio is more than 1.2), the length of the first yield section 14 is 1400mm, the thickness is 14mm, and the height is 150mm; the second yield section 13 has a length of 800mm, a thickness of 14mm and a height of 200mm; the third yield section 12 is 800mm, 14mm thick and 240mm high; the length of the non-yielding section 11 is 300mm, the thickness is 14mm, and the height is 150mm; the transition section between the second yield section 13 and the first yield section 14 is 100mm long; the transition between the second yield segment 13 and the third yield segment 12 is 150mm long. The sleeve 3 is formed by combining two groove-shaped members (a half sleeve I31 and a half sleeve II 32) supported by cold bending steel plates, the length of the sleeve 3 is 5200mm, the thickness is 20mm, the width is 200mm, the height is 260mm, and Q345 steel is adopted. The flange of the sleeve 3 is provided with connecting holes 33, the aperture size is 15mm, 4 of the connecting holes are arranged in each row, the total number of the connecting holes is 4, the number of the connecting holes is 70, and the connecting piece 6 adopts common bolts with the diameter of 14 mm. The thickness of the first limit plate is 20mm, the width is 150mm, the height is 90mm, and Q235B steel is adopted; the thickness of the second limiting plate is 20mm, the width is 200mm, the height is 90mm, and Q235B steel is adopted. The first stiffening plate component 41 and the second stiffening plate component 42 are 20mm in thickness, 90mm in width and 220mm in height, Q345 steel is adopted, the spacing between adjacent stiffening plates of the first stiffening plate component 41 and the second stiffening plate component 42 in a non-encryption area is 150mm, encryption is carried out at the first yield section 14, and the spacing between the adjacent stiffening plates is 80mm. The first buckling preventing plate 51 and the second buckling preventing plate 52 are 1400mm long, 8mm thick and 50mm high. The spacing between the second side stop 421 and the first side stop 411 is 60mm and the spacing between the first mid-stop 412 and the second mid-stop 422 is 50mm. The length of the connecting plate 7 is 5000mm, the thickness is 20mm, the width is 200mm, the connecting plate 7 is provided with connecting plate holes 71, the aperture size is 15mm, 4 connecting plates are arranged in each row, and the total number of connecting plates is 4 rows of 70 rows. The cover plate 8 has a width of 200mm, a thickness of 12mm and a height of 260mm, and the size of the cover plate hole 81 is slightly larger than the cross-shaped section formed by the end stiffening plate 2 and the non-yielding section 11 of the core material 1.
The end stiffening plates 2 are arranged at two ends of the core material 1, are vertically arranged with the core material 1, and form a non-yielding section 11 with the core material 1 by adopting a welding process; the first stiffening plate component 41, the second stiffening plate component 42, the first anti-buckling plate 51 and the second anti-buckling plate 52 are connected inside the sleeve 3 through welding, and then are installed through the connecting piece 6 and the connecting plate 7 to form a restraint device of the core material 1; the core material 1 is positioned in the restraint device; the cover plates 8 are positioned at two ends of the sleeve 3 and are connected with the sleeve 3 by welding. The third yielding section 12 and the second yielding section 13 are connected in a gradient transition mode to form a transition section, and the second yielding section 13 and the first yielding section 14 are connected in a gradient transition mode to form a transition section; the second limiting plate 15 is arranged in the transition section between the third yielding section 12 and the second yielding section 13, and the width of the second limiting plate is the same as the width of the core material of the second yielding section 13; the first limiting plate 16 is arranged in the transition section between the second yielding section 13 and the first yielding section 14, and the width of the first limiting plate is the same as that of the core material 1 of the first yielding section 14; the half sleeve I31 is identical to the half sleeve II 32, a groove-shaped member is formed by welding preferentially, and a connecting hole 33 matched with the connecting piece is formed in the groove shape preferentially; the first buckling preventing plate 51 and the second buckling preventing plate 52 are respectively and vertically arranged at the edges of the middle parts of the flanges of the first groove-type half sleeve 31 and the second groove-type half sleeve 32; the connecting piece 6 connects the connecting plate and the sleeve into a whole through the connecting plate hole 71 on the connecting plate 7 and the connecting hole 33 on the sleeve; the cover plates 8 are connected to both ends of the sleeve 3 by welding.
A manufacturing process of a novel self-balancing multi-stage energy-consumption buckling restrained brace comprises the following steps:
(1) Preparing blanks and connectors for processing the core material 1, the sleeve 3, the first stiffening plate assembly 41, the second stiffening plate assembly 42, the first anti-buckling plate 51, the second anti-buckling plate 52, the cover plate 8, the second limiting plate 15, the first limiting plate 16, the end stiffening plate 2 and the connecting plate 7;
(2) The blank steel plate is manufactured into the supported core plate 1 in a cutting mode, and the core plate 1 comprises a non-yielding section 11, a third yielding section 12, a second yielding section 13 and a first yielding section 14, wherein the requirements are that: the cross-sectional areas of the non-yielding section 11 and the third yielding section 12 are the same, the area of the second yielding section 13 and the area of the first yielding section 14 are calculated according to engineering requirements, the gradient of a transition section between the third yielding section 12 and the second yielding section 13 is 0.25-0.5, and the gradient of the transition section between the second yielding section 13 and the first yielding section 14 is 0.25-0.5;
(3) Manufacturing blanks into four second limiting plates 15, first limiting plates 16 and end stiffening plates 2 in a cutting mode, enabling the end parts of the end stiffening plates 2 to be flush with the end parts of the core materials 1, enabling the other end of the end stiffening plates 2 to be made into transition slopes, enabling the transition slopes to be 0.25-0.5, carrying out surface rust removal and sand blasting processes on the core materials 1, the second limiting plates 15, the first limiting plates 16 and the end stiffening plates 2, vertically welding the end stiffening plates 2 on two sides of a non-yield section 11 plate of the core materials 1 in a welding mode, enabling the end stiffening plates 2 to be in a cross-shaped section with the core materials 1, and welding the second limiting plates 15 and the first limiting plates 16 to be respectively welded on a transition part between a third yield section 12 and a second yield section 13 and a transition part between the second yield section 13 and a first yield section 14 in a welding mode to form an inner core member;
(4) Two groove-shaped components (a first half sleeve 31 and a second half sleeve 32) are completed through a cold bending mode, connecting holes 33 are formed in the upper flange and the lower flange of the groove-shaped components, rust removal and sand blasting are carried out on the surfaces of the first half sleeve 31, the second half sleeve 32, the first stiffening plate component 41 and the second stiffening plate component 42 obtained through a cutting mode are connected in the first half sleeve 31 and the second half sleeve 32 through welding according to calculation requirements, and the requirements are that: to control the displacement of the first yielding section 14 and the second yielding section 13, the distance between the two first stiffening plate assemblies 41 (the first lateral limiting device 411 and the first middle limiting device 412) or the second stiffening plate assemblies 42 (the second lateral limiting device 421 and the second middle limiting device 422) positioned on both sides of the first limiting plate 16 and the second limiting plate 15 should be calculated according to actual engineering requirements, and generally not more than 40% of the length of the corresponding yielding section is formed to two constraint members;
(5) The two restraining members are arranged on the outer sides of the core members and are tightly attached, connecting plates 7 with connecting plate holes 71 are arranged on the upper parts and the lower parts of the two restraining members, the connecting plate holes 71 and the connecting holes 33 are in one-to-one correspondence, and the two restraining members are connected into a whole through connecting pieces 6 and the connecting plates 7;
(6) The cover plate 8 provided with the cover plate holes 81 respectively penetrates through the two ends of the core member, is connected with the two ends of the sleeve 3 through welding, and is coated with fireproof paint and anticorrosive paint on the surface of the finished member, so that the novel self-balancing multi-stage energy-consumption buckling restrained brace is manufactured.
Claims (5)
1. The novel self-balancing type multi-stage energy-consumption buckling restrained brace is characterized by comprising a core material, a sleeve, a first stiffening plate component, a second stiffening plate component, a first buckling-restrained plate, a second buckling-restrained plate, a connecting piece, a connecting plate and a cover plate, wherein the core material comprises a non-yielding section, a third yielding section, a second yielding section and a first yielding section, the first yielding section is positioned in the middle of the core material, and the second yielding section, the third yielding section and the non-yielding section are respectively arranged on two sides of the first yielding section; the first stiffening plate assembly, the second stiffening plate assembly, the first buckling-preventing plate and the second buckling-preventing plate are connected inside the sleeve, and then the constraint device of the core material is formed by installing a connecting piece and a connecting plate; the core material is positioned in the restraint device, and the cover plates are positioned at two ends of the sleeve and connected with the sleeve;
the third yielding section and the second yielding section are connected in a gradient transition mode to form a transition section, and the second yielding section and the first yielding section are connected in a gradient transition mode to form a transition section;
the second limiting plate is arranged in the transition section between the third yielding section and the second yielding section, the width of the second limiting plate is the same as that of the core material of the second yielding section, and the height of the second limiting plate is enough to be in contact with the first stiffening plate component or the second stiffening plate component, so that redundant load is transferred to the sleeve for self-balancing;
the first limiting plate is arranged in a transition section between the second yielding section and the first yielding section, the width of the first limiting plate is the same as that of the core material of the first yielding section, and the height direction of the first limiting plate is enough to be in contact with the first stiffening plate assembly or the second stiffening plate assembly, so that redundant load is transferred to the sleeve for self-balancing;
the stiffener spacing of the first stiffener assembly and the second stiffener assembly is less at the first yield segment than at the second yield segment and the third yield segment in order to ensure local stability and overall stability of the first yield segment.
The sleeve comprises a half sleeve I, a half sleeve II and a connecting hole, wherein the half sleeve I and the half sleeve II are the same and are groove-shaped members, and the groove-shaped connecting hole matched with the connecting piece is formed in the groove;
the first stiffening plate assembly comprises a first middle limiting device and two first side limiting devices, and the second stiffening plate assembly comprises a second middle limiting device and two second side limiting devices;
the first middle limiting device comprises two stiffening plates, the second middle limiting device comprises two stiffening plates, and the two first limiting plates are respectively positioned between the stiffening plates of the first middle limiting device and between the stiffening plates of the first middle limiting device;
the first side limiting device comprises two stiffening plates, the second side limiting device comprises two second stiffening plates, and the two second limiting plates are respectively positioned between the stiffening plates of the first side limiting device and between the stiffening plates of the second side limiting device;
the distance between adjacent stiffening plates forming the first middle limiting device and the second middle limiting device is smaller than the distance between adjacent stiffening plates forming the first side limiting device and the second side limiting device;
the thickness of the first buckling preventing plate and the thickness of the second buckling preventing plate are half of the thickness of the core material plate, and the first buckling preventing plate and the second buckling preventing plate are respectively and vertically arranged at the edges of the middle parts of the flanges of the first groove type half sleeve and the second groove type half sleeve so as to ensure that the first yielding section does not generate side drums when being pressed.
2. The novel self-balancing multi-stage energy dissipating buckling restrained brace of claim 1, wherein the non-yielding section comprises a core material and end stiffening plates, the end stiffening plates being disposed at two ends of the core material and disposed perpendicular to the core material plates.
3. The novel self-balancing multi-stage energy-consuming buckling restrained brace according to claim 1 or 2, wherein the cross-sectional areas of the third yielding section, the second yielding section and the first yielding section are calculated and determined according to engineering requirements, and the area of the third yielding section is not more than 2 times of the second yielding section and is 1.1-1.8; the area of the second yielding section is not more than 1.5 times of that of the first yielding section and is 1.1 to 1.5.
4. The novel self-balancing multi-stage energy-consumption buckling restrained brace according to claim 1 or 2, wherein the connecting plate is provided with connecting plate holes; the width of the connecting plate is the same as that of the sleeve; the connecting plate holes on the connecting plate are in one-to-one correspondence with the connecting holes on the sleeve; the connecting piece is connected with the connecting plate and the sleeve into a whole through the connecting plate holes on the connecting plate and the connecting holes on the sleeve.
5. A process for manufacturing a novel self-balancing multi-stage energy-consuming buckling restrained brace according to claim 1, characterized in that it comprises the following steps:
(1) Preparing blanks and connecting pieces for processing core materials, sleeves, first stiffening plate assemblies, second stiffening plate assemblies, first anti-buckling plates, second anti-buckling plates, cover plates, second limiting plates, first limiting plates, end stiffening plates and connecting plates;
(2) Manufacturing a blank steel plate into a supported core plate in a cutting mode, wherein the core plate comprises a non-yielding section, a third yielding section, a second yielding section and a first yielding section, the cross-sectional areas of the non-yielding section and the third yielding section are the same, and the area of the second yielding section and the area of the first yielding section are calculated according to engineering requirements;
(3) Manufacturing a blank into four end limiting plates, a first limiting plate and an end stiffening plate in a cutting mode, wherein the end of the end stiffening plate is flush with the end of a core material, the other end of the end stiffening plate is made into a transition slope, the core material, the second limiting plate, the first limiting plate and the end stiffening plate are subjected to surface rust removal and sand blasting processes, the end stiffening plate is welded on two sides of a non-yielding section plate of the core material vertically in a welding mode, a cross section is formed with the core material, and the second limiting plate and the first limiting plate are welded on a transition part between a third yielding section and a second yielding section and a transition part between the second yielding section and the first yielding section respectively in a welding mode to form an internal core member;
(4) Completing two groove-shaped components, namely a half sleeve I and a half sleeve II, by using a cold bending mode, arranging connecting holes on the upper flange and the lower flange of the groove-shaped component, derusting and sandblasting the surfaces of the half sleeve I and the half sleeve II as well as the first stiffening plate component and the second stiffening plate component, and connecting the first stiffening plate component and the second stiffening plate component obtained by using a cutting mode into the half sleeve I and the half sleeve II by welding according to calculation requirements to form two constraint components;
(5) Two constraint components are arranged on the outer side of a core component and are tightly attached, connecting plates provided with connecting plate holes are arranged on the upper part and the lower part of the two constraint components, the connecting plate holes are in one-to-one correspondence with the connecting holes, and the two constraint components are connected into a whole by using a connecting piece and the connecting plate;
(6) And respectively penetrating the cover plates provided with the cover plate holes through the two ends of the core member, connecting the cover plates with the two ends of the sleeve through welding, spraying fireproof paint and anticorrosive paint on the surfaces of the finished members, and manufacturing the novel self-balancing multi-stage energy-consumption buckling restrained brace.
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| CN113123478A (en) * | 2021-03-09 | 2021-07-16 | 河北工业大学 | Friction unit of supporting structure and friction energy dissipation supporting structure with multiple friction units connected in series |
| CN115584798A (en) * | 2022-10-28 | 2023-01-10 | 中国海洋大学 | Multistage yielding buckling-restrained brace device |
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