CN110593630A - Novel self-balancing multi-stage energy-consumption buckling-restrained brace and manufacturing process - Google Patents
Novel self-balancing multi-stage energy-consumption buckling-restrained brace and manufacturing process Download PDFInfo
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- CN110593630A CN110593630A CN201910884512.1A CN201910884512A CN110593630A CN 110593630 A CN110593630 A CN 110593630A CN 201910884512 A CN201910884512 A CN 201910884512A CN 110593630 A CN110593630 A CN 110593630A
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000011162 core material Substances 0.000 claims abstract description 78
- 238000005452 bending Methods 0.000 claims abstract description 22
- 239000000306 component Substances 0.000 claims description 37
- 230000007704 transition Effects 0.000 claims description 34
- 238000003466 welding Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000008358 core component Substances 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 6
- 238000005488 sandblasting Methods 0.000 claims description 6
- 230000003449 preventive effect Effects 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 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 7
- 230000000694 effects Effects 0.000 description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 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
- 238000004898 kneading Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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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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- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
A novel self-balancing multi-stage energy-consumption buckling-restrained brace comprises a core material, a sleeve, a first stiffening plate assembly, a second stiffening plate assembly, 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 located 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 anti-bending plate and the second anti-bending plate are connected inside the sleeve, and then the first stiffening plate assembly, the second stiffening plate assembly, the first anti-bending plate and the second anti-bending plate are installed through the connecting piece and the connecting plate to form a core material restraint device; 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. 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 the main natural disasters threatening the safety of human life and property, and the earthquake can cause secondary disasters such as fire, diseases and the like and cause huge economic loss besides causing direct damages such as house collapse, personal casualties and the like. Buckling restrained braces have been widely used as an excellent energy dissipating shock absorber in the united states, japan, china, and other countries. When the structure adopting the buckling-restrained energy-dissipation brace is subjected to dynamic loads such as earthquakes, the peripheral restraining units can ensure that the internal core stress unit can achieve a full-section yielding state when being pressed, and achieve an energy-dissipation effect 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 energy-consuming brace is mostly designed according to frequent earthquakes, fortification earthquakes and rare earthquakes, and has certain limitation. Designing according to the multi-earthquake: the buckling-restrained brace is required to enter an energy consumption stage when an earthquake happens frequently, namely, the whole core material of the brace enters an elastic-plastic stage, and plastic deformation can not be recovered, so that the buckling-restrained brace is suitable to be replaced after the earthquake happens; when a fortification earthquake and a 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 requirement on the performance of steel is higher, the support design difficulty is high, and the cost is higher. Designing according to a fortification earthquake or a rare earthquake: the buckling-restrained brace can play the effect of energy dissipation and shock absorption under the action of earthquake and rare earthquake loads, and protect the safety of the structure, but under the action of frequent earthquakes and typhoons, the buckling-restrained brace does not consume energy, the core material is always in the elastic stage, the buckling-restrained brace does not provide an additional damping ratio for the structure, only plays the role of bracing, and is difficult to yield and dissipate energy before the concrete member cracks.
In recent years, experts at home and abroad research the problems and propose various concepts, design methods and the like of the multi-stage buckling-restrained brace, but some problems exist. (1) The weaker yielding section in the buckling-restrained brace enters energy consumption under the action of small earthquake and typhoon, and the stronger yielding section is in an elastic stage; under the earthquake of the set protection and the earthquake rarely occurred, the weaker yielding section in the buckling-restrained brace can still displace and continue to consume energy, if the stronger yielding section reaches the ultimate stress, the weaker yielding section will have fatigue failure, 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, certain potential safety hazards are realized, and the engineering application is not facilitated. (2) The weak yielding section of the buckling-restrained brace is not restrained enough, and the weak yielding section is easy to generate out-of-plane instability, so that the energy consumption performance of the brace and the safety of the brace are greatly influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the novel self-balancing multi-stage energy-consumption buckling-restrained brace and the manufacturing process thereof, which can be widely applied to the technical fields of building 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 slow rigidity degradation after buckling.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a novel self-balancing multi-stage energy-consumption buckling-restrained brace comprises a core material, a sleeve, a first stiffening plate assembly, a second stiffening plate assembly, 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 located 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 anti-bending plate and the second anti-bending plate are connected to the inner part of 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 segment comprises a core material and end stiffening plates, wherein the end stiffening plates are arranged at two ends of the core material and are perpendicular to the core material plate.
Preferentially, the core material is preferably mild steel, and can also be common steel, but the elongation is more than 30%, and the yield ratio is more than 1.2;
preferentially, the elastic limit bearing capacity of the non-yielding segment is greater than the limit bearing capacity of the third yielding segment;
preferably, the end stiffening plate is made of the same material as the core material, and can also be made of steel with higher strength;
and the third yielding section is connected with the second yielding section in a gradient transition mode to form a transition section, and the second yielding section is connected with the first yielding section in a gradient transition mode to form the transition section.
Preferably, the gradient between the third yielding segment and the second yielding segment should not be greater than 0.5, preferably 0.25 to 0.5, and the gradient between the second yielding segment and the first yielding segment should not be greater than 0.5, preferably 0.25 to 0.5;
the cross-sectional areas of the third yielding segment, the second yielding segment and the first yielding segment are determined according to engineering requirements by calculation, but the area of the third yielding segment is not more than 2 times of that of the second yielding segment, preferably 1.1-1.8, and the area of the second yielding segment is not more than 1.5 times of that of the first yielding segment, preferably 1.1-1.5;
furthermore, 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 the width of the second yielding section core material, and the height of the second limiting plate is enough to have a contact surface with the first stiffening plate component or the second stiffening plate component, so that the excessive load is transmitted 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 the width of the core material of the first yielding section, and the height direction of the first limiting plate has enough contact surface with the first stiffening plate assembly or the second stiffening plate assembly, so that redundant load is transmitted to the sleeve to carry out self-balancing;
the distance between the stiffening plates of the first stiffening plate assembly and the second stiffening plate assembly is smaller at the first yielding section than at the second yielding section, so that the local stability and the overall stability of the first yielding section are ensured.
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, the first half sleeve and the second half sleeve are the same, a groove-shaped component is preferentially formed by welding, and a connecting hole matched with the connecting piece is preferentially arranged in the groove shape;
preferentially, the half casing pipe I and the half casing pipe II adopt steel materials with a grade higher than that of the core material, and the cross section area of the half casing pipe I and the half casing pipe II is more than 2.5 times of that of the second yield section;
further, 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 the adjacent stiffening plates forming the first middle limiting device and the second middle limiting device is smaller than the distance between the adjacent stiffening plates forming the first side limiting device and the second side limiting device.
Preferably, the height of the first stiffening plate assembly and the second stiffening plate assembly is the same as the height of the inner dimension of the first trough-type half casing or the second trough-type half casing, and the width of the first stiffening plate assembly and the second stiffening plate assembly is equal to the width of the inner dimension of the first trough-type half casing or the second trough-type half casing minus half the thickness of the core material and then minus 1-2 mm, so that a certain gap is ensured between the core material and the first stiffening plate assembly or the second stiffening plate assembly, and the installation and support work is facilitated.
Further, the thickness of the first anti-bending plate and the thickness of the second anti-bending plate are half of the thickness of the core material plate, and the first anti-bending plate and the second anti-bending plate are respectively vertically arranged on the edges of the middle parts of flanges of the first groove-shaped half sleeve and the second groove-shaped half sleeve so as to ensure that the first yielding section does not generate side bulging when being pressed.
Preferably, the first bending prevention plate and the second bending prevention 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 material of the connecting plate is the same as that of the sleeve.
Preferably, the connecting plate holes on the connecting plate correspond to the connecting holes on the sleeve one to one.
Further, the connecting piece is preferably a high-strength bolt or a rivet.
Preferably, the connecting piece connects the connecting plate and the casing into a whole through the connecting plate hole on the connecting plate and the connecting hole on the casing.
Further, the cover plate is the same as the outer size of the end face of the sleeve.
Preferably, the cover plate is provided with a cover plate hole, so that the core material and the end stiffening plate can penetrate through the cover plate.
Preferentially, the size of the cover plate hole is slightly larger than the section size of the non-yielding section and is about 1-2 mm larger.
Preferably, the cover plate is connected to both ends of the sleeve by welding.
A manufacturing process of a novel self-balancing type multi-stage energy-consumption buckling-restrained brace comprises the following steps:
(1) preparing blanks and connecting pieces for processing a core material, a sleeve, a first stiffening plate assembly, a second stiffening plate assembly, a first anti-buckling plate, a second anti-buckling plate, a cover plate, a second limiting plate, a first limiting plate, an end stiffening plate and a connecting plate;
(2) the method comprises the following steps of 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 obtained according to the calculation of engineering requirements;
(3) manufacturing a blank into four pieces of a second limiting plate, a first limiting plate and an end stiffening plate in a cutting mode, enabling the end part of the end stiffening plate to be flush with the end part of the core material, enabling the other end of the end stiffening plate to be a transition slope, carrying out surface derusting and sand blasting processes on the core material, the second limiting plate, the first limiting plate and the end stiffening plate, vertically welding the end stiffening plate on two sides of a non-yielding segment plate of the core material in a welding mode to form a cross-shaped section with the core material, and respectively welding the second limiting plate and the first limiting plate on a transition part between a third yielding segment and a second yielding segment and a transition part between the second yielding segment and a first yielding segment by welding to form an internal core component;
(4) two groove-shaped components, namely a half casing pipe I and a half casing pipe II, are formed on a steel plate in a cold bending mode, connecting holes are formed in the upper flange and the lower flange of each groove-shaped component, surface rust removal and sand blasting are carried out on the half casing pipe I, the half casing pipe II, a first stiffening plate assembly and a second stiffening plate assembly, the first stiffening plate assembly and the second stiffening plate assembly are obtained through a cutting mode and are connected into the half casing pipe I and the half casing pipe II through welding according to the calculation requirements, and two constraint components are formed;
(5) installing the two constraint components on the outer sides of the core components, tightly fitting the two constraint components, arranging connecting plates 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 connecting pieces and the connecting plates;
(6) and the cover plates with the cover plate holes penetrate through two ends of the core component respectively, are connected with two ends of the sleeve pipe through welding, and are sprayed with fireproof paint and anticorrosive paint on the surface of the finished component, so that the novel self-balancing multi-stage energy-consumption buckling-restrained brace is manufactured.
The invention has the following beneficial effects:
(1) the structure is divided into a first yielding section, a second yielding section and a third yielding section, and the requirement of staged energy consumption can be met. Typhoon load or unwanted earthquake case: the first yielding segment enters a yielding stage, and the second yielding segment and the third yielding segment are in an elastic stage; and (3) fortifying earthquake: the first yielding segment is in a yielding stage, the second yielding segment enters the yielding stage, and the third yielding segment is in an elastic stage; rare earthquakes: the first yielding segment, the second yielding segment and the third yielding segment all enter the yielding stage.
(2) The first yield section is ensured not to generate pressure side bulging by arranging the first anti-bending plate and the second anti-bending plate; by arranging the first stiffening plate assembly and the second stiffening plate assembly, the support core material is prevented from buckling in the plane and buckling out of the plane under the left and right external loads; the first stiffened plate component and the second stiffened plate component which are encrypted are arranged at the weak first yielding section, so that the first yielding section can be ensured not to be buckled or broken under the action of external load, and the support can be ensured to have better energy consumption stability and safety.
(3) Arranging a first limiting plate and a second limiting plate 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, wherein the distance between the first stiffening rib and the second stiffening rib is arranged on the two sides of the first limiting plate and the second limiting plate according to the engineering requirements according to the calculated ultimate displacement of the first yielding section and the ultimate displacement of the second yielding section, and a limiting device formed by the first stiffening rib and the second stiffening rib can ensure that the energy consumption can be realized when the support is supported under typhoon or excessive earthquake, so that the structure is prevented from being damaged; after the earthquake enters the fortification, the displacement of the first yielding section is limited through the limiting device, the first yielding section is guaranteed not to be deformed and exceed the limit displacement to be damaged, the external load which can be borne by the first yielding section is transmitted to the limiting device through the limiting plate and then transmitted to the constraint device on the outer side through the limiting device, and the self-balancing effect is achieved in the constraint device on the outer side; after the earthquake happens rarely, the limiting device limits the displacement of the first yielding section and the second yielding section, the first yielding section and the second yielding section are guaranteed not to be deformed and exceed the limit displacement to be damaged, external loads which can be borne by the first yielding section and the second yielding section are transmitted to the limiting device through the limiting plate, then the external loads are transmitted to the limiting device through the limiting device, the limiting device transmits the external loads to the limiting device, and the self-balancing effect is achieved in the external restraining device.
(4) The half sleeve I and the half sleeve II are arranged on the outer side of the kneading material through the connecting piece and the connecting plate to form a whole, when the connecting piece is a bolt, the core material can be replaced by unscrewing the bolt after the inner core material is damaged, and the assembling performance is certain.
(5) The buckling-restrained energy-dissipation brace is simple in process flow, high in economic performance in the manufacturing aspect and convenient to replace after an earthquake.
Drawings
Fig. 1 is a schematic overall front view of the novel self-balancing multi-stage energy-consumption buckling-restrained brace.
Fig. 2 is a schematic front view of a core material of the novel self-balancing multi-stage energy-consumption buckling-restrained brace.
Fig. 3 is a front sectional view of the novel self-balancing multi-stage energy-consumption 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 line B-B in fig. 1.
Fig. 6 is a cross-sectional view taken along the direction C-C of fig. 1.
Fig. 7 is a sectional view in one direction of fig. 2.
Fig. 8 is a cross-sectional view taken along the direction E-E of fig. 2.
Fig. 9 is a sectional view taken along the direction F-F of fig. 2.
Fig. 10 is an exploded view of the novel self-balancing multi-stage energy-consumption buckling-restrained brace.
Wherein, 1 is the core, 11 is the non-yield section, 12 is the third yield section, 13 is the second yield section, 14 is the first yield section, 15 is the second limiting plate, 16 is the first limiting plate, 2 is the tip stiffening plate, 3 is the sleeve pipe, 31 is half sleeve pipe one, 32 is half sleeve pipe two, 33 is the connecting hole, 41 is the first stiffening plate subassembly, 42 is the second stiffening plate subassembly, 411 is first limit device on the side, 412 is first body middle part stop device, 421 is second avris stop device, 422 is second middle part stop device, 51 is first anti-buckling board, 52 is the second anti-buckling board, 6 is the connecting piece, 7 is the connecting plate, 71 is the connecting plate hole, 8 is the apron, 81 is the apron hole.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 10, the novel self-balancing multi-stage energy-consumption buckling-restrained brace comprises a core material 1, an end stiffening plate 2, a sleeve 3, a first half sleeve 31, a second half sleeve 32, a connecting hole 33, a first stiffening plate assembly 41, a second stiffening plate assembly 42, a first side limiting device 411, a first middle limiting device 412, a second side 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 located 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 to the interior of the sleeve, and then the constraint device of the core material is formed by installing connecting pieces and connecting plates; the core material 1 is positioned inside the constraint device, and the cover plates 8 are positioned at two ends of the sleeve 3 and connected with the sleeve 3.
In the embodiment, the total support length is 5800mm, the core material is Q235B (the elongation is more than 30%, and the ratio of strength to yield is more than 1.2), the first yield section 14 is 1400mm long, the thickness is 14mm, and the height is 150 mm; the length of the second yielding section 13 is 800mm, the thickness is 14mm, and the height is 200 mm; the third yielding segment 12 is 800mm, 14mm in thickness and 240mm in height; the length of the non-yielding segment 11 is 300mm, the thickness is 14mm, and the height is 150 mm; the transition between the second yield segment 13 and the first yield segment 14 is 100mm long; the transition between the second 13 and third 12 yielding segments is 150mm long. The sleeve 3 is formed by combining two groove-shaped components (a half sleeve I31 and a half sleeve II 32) supported by cold bending of steel plates, the length of the sleeve 3 is 5200mm, the thickness of the sleeve is 20mm, the width of the sleeve is 200mm, the height of the sleeve is 260mm, and Q345 steel is adopted. The flange of the sleeve 3 is provided with connecting holes 33, the aperture is 15mm, 4 holes are arranged in each row, 70 rows are formed in 4 rows, and the connecting piece 6 adopts common bolts with the diameter of 14 mm. The first limiting plate is 20mm in thickness, 150mm in width and 90mm in height, and is made of Q235B steel; the thickness of the second limiting plate is 20mm, the width of the second limiting plate is 200mm, the height of the second limiting plate is 90mm, and Q235B steel is adopted. The thickness of the first stiffening plate assembly 41 and the second stiffening plate assembly 42 is 20mm, the width is 90mm, the height is 220mm, Q345 steel is adopted, the distance between the adjacent stiffening plates of the first stiffening plate assembly 41 and the second stiffening plate assembly 42 in the non-stiffened area is 150mm, the first yielding section 14 is arranged in a stiffened manner, and the distance between the adjacent stiffening plates is 80 mm. The first and second buckling preventive plates 51 and 52 have a length of 1400mm, a thickness of 8mm and a height of 50 mm. The distance between the second side limiting device 421 and the first side limiting device 411 is 60mm, and the distance between the first middle limiting device 412 and the second middle limiting device 422 is 50 mm. The connecting plate 7 is 5000mm long, 20mm thick, width 200mm, and connecting plate hole 71 is seted up on the connecting plate 7, and the aperture size is 15mm, and 4 each row, 70 rows in total. The width of the cover plate 8 is 200mm, the thickness is 12mm, the height is 260mm, and the size of the cover plate hole 81 is slightly larger than that of a cross-shaped cross section formed by the end stiffening plate 2 and the core material 1 non-yielding section 11.
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 an unconfined 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 a constraint device of the core material 1 is formed through the connecting piece 6 and the connecting plate 7; the core material 1 is positioned inside the restraint device; the cover plates 8 are located at both ends of the sleeve 3 and are connected to the sleeve 3 by welding. The third yielding section 12 is connected with the second yielding section 13 in a gradient transition mode to form a transition section, and the second yielding section 13 is connected with the first yielding section 14 in a gradient transition mode to form a transition section; the second limiting plate 15 is arranged in a 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 that of the core material of the second yielding section 13; a first limiting plate 16 is arranged in a 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 first yielding section 14 core material 1; the first half sleeve 31 and the second half sleeve 32 are the same, a groove-shaped component is formed preferentially through welding, and a connecting hole 33 matched with the connecting piece is preferentially arranged in the groove shape; the first anti-bending plate 51 and the second anti-bending plate 52 are respectively and vertically arranged on the flange middle edges of the first groove-shaped half sleeve 31 and the second groove-shaped 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 type multi-stage energy-consumption buckling-restrained brace comprises the following steps:
(1) preparing blanks and connecting pieces for processing a core material 1, a sleeve 3, a first stiffening plate component 41, a second stiffening plate component 42, a first anti-buckling plate 51, a second anti-buckling plate 52, a cover plate 8, a second limiting plate 15, a first limiting plate 16, an end stiffening plate 2 and a connecting plate 7;
(2) the core plate 1 for supporting is manufactured by a blank steel plate in a cutting mode, and the core plate 1 comprises an unyielding section 11, a third yielding section 12, a second yielding section 13 and a first yielding section 14, and is required to be as follows: 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 obtained according to engineering requirements by calculation, 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 a transition section between the second yielding section 13 and the first yielding section 14 is 0.25-0.5;
(3) manufacturing a blank into four pieces of a second limiting plate 15, a first limiting plate 16 and an end stiffening plate 2 by a cutting mode, wherein the end part of the end stiffening plate 2 is flush with the end part of the core material 1, the other end of the end stiffening plate 2 is made into a transition slope, the slope of a transition section is 0.25-0.5, performing surface derusting and sand blasting processes on the core material 1, the second limiting plate 15, the first limiting plate 16 and the end stiffening plate 2, vertically welding the end stiffening plate 2 on two sides of a non-yielding section 11 plate of the core material 1 in a welding mode to form a cross-shaped section with the core material 1, and respectively welding the second limiting plate 15 and the first limiting plate 16 on a transition part between a third yielding section 12 and a second yielding section 13 and a transition part between the second yielding section 13 and a first yielding section 14 by welding to form an internal core component;
(4) two channel-shaped components (a half sleeve pipe 31 and a half sleeve pipe 32) are formed by a steel plate in a cold bending mode, connecting holes 33 are formed in the upper flange and the lower flange of each channel-shaped component, surface derusting and sand blasting are carried out on the half sleeve pipe 31, the half sleeve pipe 32, a first stiffening plate assembly 41 and a second stiffening plate assembly 42, the first stiffening plate assembly 41 and the second stiffening plate assembly 42 are obtained through a cutting mode, and the first stiffening plate assembly 41 and the second stiffening plate assembly 42 are connected into the half sleeve pipe 31 and the half sleeve pipe 32 through welding according to calculation requirements, and the requirements are: in order to control the displacement of the first yielding segment 14 and the second yielding segment 13, the distance between the two first stiffening plate assemblies 41 (the first edge side limiting device 411 and the first middle limiting device 412) or the second stiffening plate assemblies 42 (the second edge side limiting device 421 and the second middle limiting device 422) positioned at the two sides of the first limiting plate 16 and the second limiting plate 15 is calculated according to the actual engineering requirements, generally does not exceed 40% of the length of the corresponding yielding segment, and two constraint components are formed;
(5) installing the two constraint components on the outer sides of the core components, tightly fitting the two constraint components, arranging connecting plates 7 with connecting plate holes 71 on the upper parts and the lower parts of the two constraint components, enabling the connecting plate holes 71 and the connecting holes 33 to be in one-to-one correspondence, and connecting the two constraint components into a whole by using connecting pieces 6 and the connecting plates 7;
(6) and the cover plate 8 with the cover plate hole 81 penetrates through two ends of the core component respectively, is connected with two ends of the sleeve 3 through welding, and is sprayed with fireproof paint and anticorrosive paint on the surface of the finished component, so that the novel self-balancing multi-stage energy-consumption buckling-restrained brace is manufactured.
Claims (10)
1. The novel self-balancing multi-stage energy-consumption buckling-restrained brace is characterized by comprising a core material, a sleeve, a first stiffening plate assembly, a second stiffening plate assembly, 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 anti-bending plate and the second anti-bending plate are connected to the inner part of 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.
2. The novel self-balancing multi-stage energy-consumption buckling restrained brace as claimed in claim 1, wherein the non-yielding segment 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 plate.
3. The novel self-balancing multi-stage energy-consumption buckling-restrained brace as claimed in claim 1 or 2, wherein the third yielding section and the second yielding section are connected in a gradient transition manner to form a transition section, and the second yielding section and the first yielding section are connected in a gradient transition manner to form a transition section; the cross-sectional areas of the third yielding section, the second yielding section and the first yielding section are determined according to engineering requirements in a calculation mode, the area of the third yielding section is not more than 2 times of that 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 1.1-1.5.
4. The novel self-balancing multi-stage energy-consumption buckling restrained brace as claimed in claim 3, wherein the second limiting plate is disposed in the transition section between the third yielding section and the second yielding section, has the same width as the core material of the second yielding section, and has a height sufficient to contact the first stiffening plate assembly or the second stiffening plate assembly, so as to transmit the excessive load to the casing 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 the width of the core material of the first yielding section, and the height direction of the first limiting plate has enough contact surface with the first stiffening plate assembly or the second stiffening plate assembly, so that redundant load is transmitted to the sleeve to perform self-balancing;
the distance between the stiffening plates of the first stiffening plate assembly and the second stiffening plate assembly is smaller at the first yielding section than at the second yielding section, so that the local stability and the overall stability of the first yielding section are ensured.
5. The novel self-balancing multi-stage energy-consumption buckling restrained brace as claimed in claim 1 or 2, wherein the sleeve comprises a first half sleeve, a second half sleeve and a connecting hole, the first half sleeve and the second half sleeve are the same and are groove-shaped members, and the connecting hole matched with the connecting piece is formed in the groove shape.
6. The novel self-balancing multi-stage energy-consumption buckling restrained brace as claimed in claim 1 or 2, wherein said first stiffening plate assembly comprises a first left limiting device, a second left limiting device and a first stiffening plate, and said second stiffening plate assembly comprises a first right limiting device, a second right limiting device and a second stiffening plate.
7. The novel self-balancing multi-stage energy-consumption buckling restrained brace as recited in claim 6, wherein said first stiffening plate assembly comprises a first middle limiting device and two first side limiting devices, and said 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 the adjacent stiffening plates forming the first middle limiting device and the second middle limiting device is smaller than the distance between the adjacent stiffening plates forming the first side limiting device and the second side limiting device.
8. The novel self-balancing multi-stage energy-consumption buckling restrained brace as claimed in claim 1 or 2, wherein the thickness of the first buckling preventive plate and the second buckling preventive plate is half of the thickness of the core plate, and the first buckling preventive plate and the second buckling preventive plate are respectively vertically arranged on the middle edges of flanges of the first groove-shaped half sleeve and the second groove-shaped half sleeve so as to ensure that the first yielding section is not subjected to lateral bulging when being pressed.
9. The novel self-balancing multi-stage energy-consumption buckling restrained brace as claimed in claim 1 or 2, wherein the connecting plates are 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 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.
10. The manufacturing process of the novel self-balancing multi-stage energy-consumption buckling-restrained brace as claimed in claim 1, wherein the manufacturing process comprises the following steps:
(1) preparing blanks and connecting pieces for processing a core material, a sleeve, a first stiffening plate assembly, a second stiffening plate assembly, a first anti-buckling plate, a second anti-buckling plate, a cover plate, a second limiting plate, a first limiting plate, an end stiffening plate and a connecting plate;
(2) the method comprises the following steps of 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 obtained according to the calculation of engineering requirements;
(3) manufacturing a blank into four pieces of a second limiting plate, a first limiting plate and an end stiffening plate in a cutting mode, enabling the end part of the end stiffening plate to be flush with the end part of the core material, enabling the other end of the end stiffening plate to be a transition slope, carrying out surface derusting and sand blasting processes on the core material, the second limiting plate, the first limiting plate and the end stiffening plate, vertically welding the end stiffening plate on two sides of a non-yielding segment plate of the core material in a welding mode to form a cross-shaped section with the core material, and respectively welding the second limiting plate and the first limiting plate on a transition part between a third yielding segment and a second yielding segment and a transition part between the second yielding segment and a first yielding segment by welding to form an internal core component;
(4) two groove-shaped components, namely a half casing pipe I and a half casing pipe II, are formed on a steel plate in a cold bending mode, connecting holes are formed in the upper flange and the lower flange of each groove-shaped component, surface rust removal and sand blasting are carried out on the half casing pipe I, the half casing pipe II, a first stiffening plate assembly and a second stiffening plate assembly, the first stiffening plate assembly and the second stiffening plate assembly are obtained through a cutting mode and are connected into the half casing pipe I and the half casing pipe II through welding according to the calculation requirements, and two constraint components are formed;
(5) installing the two constraint components on the outer sides of the core components, tightly fitting the two constraint components, arranging connecting plates 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 connecting pieces and the connecting plates;
(6) and the cover plates with the cover plate holes penetrate through two ends of the core component respectively, are connected with two ends of the sleeve pipe through welding, and are sprayed with fireproof paint and anticorrosive paint on the surface of the finished component, so that the novel self-balancing multi-stage energy-consumption buckling-restrained brace is manufactured.
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| CN110593630B (en) | 2024-03-12 |
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