CN113719177B - Damping plate group with multi-stage yielding and deformation restorable functions - Google Patents
Damping plate group with multi-stage yielding and deformation restorable functions Download PDFInfo
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- CN113719177B CN113719177B CN202110917703.0A CN202110917703A CN113719177B CN 113719177 B CN113719177 B CN 113719177B CN 202110917703 A CN202110917703 A CN 202110917703A CN 113719177 B CN113719177 B CN 113719177B
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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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
- E04H9/0237—Structural braces with damping devices
Abstract
The invention discloses a damping plate group with multi-step yield and deformation restorable functions, which is formed by superposing a limiting combination plate, an arch-shaped weakened SMA (shape memory alloy) spliced plate and a reinforced buckling restrained plate and comprises an L-shaped slotted steel plate, an arch-shaped weakened low-yield-point steel plate, an arch-shaped single-side weakened SMA plate, a reinforced buckling restrained plate and a bolt; the design convex curve of one side plate of the L-shaped slotted steel plate is matched with the groove formed by the arch-shaped weakened low-yield-point steel plate in a matching way to form a limiting combined plate; the arch weakening SMA split plate is formed by splicing two arch single-side weakening SMA plates. The invention provides the damping plate group which can realize large deformation and simultaneously has good energy consumption capability and deformation restorable performance through the design of the limiting combined plate with the convex curves matched with the grooves and the combination of the low-yield-point steel plate with good energy consumption capability and the SMA plate with deformation restorable performance, and has the characteristics of simple structure, easy installation, obvious energy consumption and self-resetting effect and the like.
Description
Technical Field
The invention belongs to the field of structural engineering seismic resistance, and particularly relates to a damping plate group with multi-stage yielding and deformation restorable functions.
Background
In recent years, with continuous innovation of anti-seismic technology, structural vibration control introduces anti-seismic design of a structure, wherein the energy dissipation and vibration reduction technology is applied to the structure and can effectively reduce the reaction and loss of the structure under the action of an earthquake, so that the anti-seismic vibration reduction technology is effective. The energy dissipation and vibration reduction technology is characterized in that some components in the structure are designed into energy dissipation components or damping devices are arranged at some parts of the structure, so that the energy generated when the structure vibrates is consumed, the vibration stress of the structure is effectively reduced, and the anti-seismic performance of the structure is enhanced. In addition, the recoverable function earthquake-proof structure takes the replaceable mechanism and the energy consumption mechanism as core mechanisms, and the structure is considered not to be damaged after the earthquake, or only slightly damaged, or damaged on a preset replaceable component, so that the safety of the structure and the quick recovery of the use function of the structure after the earthquake are ensured. The self-resetting device with deformation restorability and energy consumption capability and the corresponding structure system have excellent anti-seismic performance, and are verified by tests and numerical simulation researches. When the damping device is used for structural energy dissipation and vibration reduction, the traditional damping device needs to have larger damping force and sufficient energy consumption capacity to meet the requirement of structural energy dissipation and vibration reduction, and the novel damping device needs not only very large damping force and energy consumption capacity, but also sufficient deformation restorability to reduce the deformation and damage of the structure.
The Shape Memory Alloy (SMA) is an intelligent material with deformation recoverable performance, and the low-yield-point steel has lower yield point, good ductility and energy consumption capability. In the damping device researched and developed at present, a reasonable structure is lacked to combine Shape Memory Alloy (SMA) and steel with low yield point, so that the mechanical properties of the two materials are fully exerted, the energy consumption capability of the damping device is improved, and the deformation restorability is realized. Based on the structure, the invention provides a damping plate group with multi-stage yielding and deformation restorable functions.
Disclosure of Invention
The invention aims to provide a damping plate group with multi-step yield and deformation restorable functions, and provides a damping device which can realize large deformation, has good energy consumption capability and deformation restorable performance, and is simple in structure and convenient to install through a limit combination plate design with convex curves matched with grooves and a combination of a low-yield-point steel plate with good energy consumption capability and an SMA plate with deformation restorable performance.
The technical scheme provided by the invention is as follows:
a damping plate group with multi-step yield and deformation restorable comprises an arch weakening SMA splicing plate, wherein the arch weakening SMA splicing plate is clamped between an upper limiting combination plate and a lower limiting combination plate; the limiting combination plate and the outer side of the middle part of the arched weakening SMA splicing plate are clamped and fixed by the outermost side strengthening buckling restraining plate; the limiting combination plate comprises L-shaped slotted steel plates which are fixedly connected with two ends of the arch weakening SMA splicing plate respectively, an arch weakening low-yield-point steel plate is connected between the L-shaped slotted steel plates in a clamping manner, and the arch weakening low-yield-point steel plate is positioned on the outer side of the arch weakening SMA splicing plate; the arched weakened SMA splicing plate is formed by splicing two arched single-side weakened SMA plates through the non-weakened side, the two arched single-side weakened SMA plates are symmetrically arranged, the arched weakened sides are positioned on the outer sides, and the non-weakened sides are matched with each other; the arch-shaped weakened low-yield-point steel plate covers the inner side between the two arch-shaped single-side weakened SMA plates; the upper and lower outermost side reinforced buckling restrained plates are connected and fixed with each other through bolts.
In a further improvement, the end part of the L-shaped slotted steel plate is provided with a slot, the side wall of the slot is convexly provided with a convex curve, and the end part of the arch-weakened low-yield-point steel plate is concavely provided with a groove matched with the convex curve.
In a further improvement, a first bolt connecting hole for connecting an arched single-side weakened SMA plate is formed in the end part of the side plate, which is provided with the groove, of the L-shaped grooved steel plate, and a second bolt connecting hole is formed in the other side plate; a third bolt connecting hole is formed in the arched single-side weakened SMA plate; the high-strength bolt penetrates through the first bolt connecting hole and the third bolt connecting hole to fixedly connect the upper layer of L-shaped slotted steel plate, the lower layer of L-shaped slotted steel plate and the arched single-side weakened SMA plate.
Further improvement, protruding song is the protruding song of fillet, and the recess is the fillet recess, and the radius of the corresponding circle of fillet is 1.2~1.5 times arch and weakens the thickness of low yield point steel sheet.
The arch-weakened low-yield-point steel plate is made of low-yield-point steel with the yield stress range of 100 MPa-160 MPa, and two sides of the middle section of the arch-weakened low-yield-point steel plate are weakened in an arch shape to form an arch-weakened surface.
In a further improvement, a weakening surface of the arched unilateral weakening SMA plate is provided with a slot-shaped hole to realize secondary weakening; and third bolt connecting holes for connecting the damping plate groups are formed in two ends of the arched single-side weakened SMA plate.
In a further improvement, the reinforced buckling restrained plate is arranged outside the arched weakened surface; bolt connecting holes are formed in the plate edge parts of the upper and lower layers of reinforced buckling constraint plates, the limiting combination plate and the arched weakened SMA splicing plate, which are not overlapped; a common bolt penetrates through the bolt connecting hole to connect and fix the upper and lower layers of the reinforced buckling restrained plates; the outer surface of the reinforced buckling restrained panel is provided with a plurality of groups of bulges.
The invention has the following beneficial effects:
1. the invention combines the low yield point steel plate with good energy consumption capability and the SMA plate with deformation restorable performance, thereby realizing the damping device with energy consumption capability and deformation restorable performance at the same time.
2. According to the invention, the arch-shaped weakened low-yield-point steel plate and the arch-shaped single-side weakened SMA plate are combined, the arch-shaped weakened part of the arch-shaped single-side weakened SMA plate is provided with the slot-shaped hole for secondary weakening, deformation is concentrated in the arch-shaped weakened part of the arch-shaped weakened low-yield-point steel plate and the arch-shaped single-side weakened SMA plate in the stress process, multi-stage yield of the arch-shaped weakened low-yield-point steel plate and the arch-shaped single-side weakened SMA plate is realized, two ends are basically in an elastic stage, and good ductility of the damping plate group is realized.
3. The limiting combination plate is designed by correspondingly matching the convex curve arranged on the L-shaped slotted steel plate and the groove arranged at the end part of the arch-shaped weakened low-yield-point steel plate, so that the L-shaped slotted steel plate and the arch-shaped weakened low-yield-point steel plate slide relative to each other in the stress process, the sliding distance is limited, and the energy consumption capability of the damping plate group is improved through friction in the sliding process.
4. The two groups of reinforced buckling constraint plates connected to the outermost side of the arched weakening area of the damping plate group ensure the cooperative stress of the damping plate group in the arched weakening area, prevent the occurrence of out-of-plane buckling and avoid the influence on the relative sliding between the plates.
5. The invention is composed of an upper layer limiting combined plate, a lower layer limiting combined plate, a middle layer arch weakening SMA combined plate and an outermost side reinforcing buckling restrained plate which are overlapped, wherein the end part of each layer plate is provided with a bolt connecting hole to realize the connection between the damping plates, and one side plate, which is not provided with a groove, of the L-shaped slotted steel plate in the upper layer limiting combined plate and the lower layer limiting combined plate is provided with a bolt connecting hole to realize the connection between the damping plate and other structures.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a broken away detail view of the present invention;
FIG. 3 is a plan view of a retainer plate;
FIG. 4 is a schematic view of an L-shaped slotted steel plate;
FIG. 5 is a schematic view of an arch weakened low yield point steel plate;
FIG. 6 is a schematic view of an arch-shaped weakened SMA split plate and an arch-shaped single-side weakened SMA plate;
FIG. 7 is a schematic view of a reinforced buckling restrained plate;
FIG. 8 is a side view of the present invention;
fig. 9 is a front view of the present invention.
Wherein, the numbering of each part is as follows: 1. a limiting composition board; 11. an L-shaped slotted steel plate; 11-1, convex curve; 11-2, a first bolt connecting hole; 11-3, a second bolt connecting hole; 12. an arch weakened low yield point steel plate; 12-1, a groove; 2. an arch weakened SMA ply; 21. An arched single-side weakened SMA plate; 21-1, a third bolt connecting hole; 21-2, slot holes; 3. reinforcing the buckling restrained panel; 3-1, reinforcing a bolt connecting hole of the buckling restrained plate; 3-2, reinforcing the buckling restrained plate to bulge; 4. a high-strength bolt; 5. and (4) common bolts.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a damping plate group with multi-stage yield and deformation restorable functions, which comprises an upper limiting composition plate 1, a lower limiting composition plate 1, an intermediate layer arch weakening SMA (shape memory alloy) spliced plate 2, an outermost reinforcing buckling constraint plate 3, a high-strength bolt 4 and a common bolt 5 as shown in figure 1 or figure 2.
Referring to fig. 3, the limiting composition plate 1 comprises an L-shaped slotted steel plate 11 and an arch-shaped weakened low-yield-point steel plate 12. A convex curve 11-1 is designed in a groove of one side plate with a groove of the L-shaped slotted steel plate 11, a groove 12-1 is formed at the end part of the arch-shaped weakened low-yield-point steel plate 12, and the convex curve 11-1 and the groove 12-1 are matched in a matching way. The convex curve 11-1 and the groove 12-1 are a rounded convex curve and a rounded groove so as to avoid local buckling of the steel plate caused by stress concentration when the L-shaped slotted steel plate 11 is in contact with the arch-weakened low-yield-point steel plate 12, and the radius of the corresponding circle is 1.2-1.5 times of the thickness of the arch-weakened low-yield-point steel plate 12.
Referring to fig. 4, a first bolt connecting hole 11-2 for connecting a damping plate group is formed in the end of one side plate of the L-shaped slotted steel plate 11 with a groove; and a second bolt connecting hole 11-3 for connecting other structural components is formed in one side plate without the groove, so that the connection between the interior of the damping plate group and other structural components is realized.
The arch weakening low-yield-point steel plate 12 is made of low-yield-point steel with the yield stress range of 100 MPa-160 MPa, the middle section is weakened in an arch shape, plasticity is achieved through early yielding of a weakening surface, and the two ends are basically guaranteed to be in an elastic stage, so that good ductility of the damping plate group is achieved.
Referring to fig. 6, the arch-shaped weakened SMA composite plate 2 is formed by splicing two arch-shaped single-side weakened SMA plates 21 through one non-weakened side, the two arch-shaped single-side weakened SMA plates 21 are symmetrically arranged, the arch-shaped weakened sides are positioned at the outer sides, and the non-weakened sides are matched with each other, so that a yield area is uniformly distributed, and the mechanical property of the SMA plates is fully exerted. The arch-shaped single-side weakened SMA plate 21 is provided with a slot-shaped hole 21-2 at the arch-shaped weakened part and a third bolt connecting hole 21-1 at the end part for connecting the damping plate group. The arched weakening part is provided with a slot-shaped hole to realize secondary weakening, so that the yield deformation is concentrated in an arched weakening area in the stress process, the deformation capability of the plate is improved, and the characteristic of deformation restorability is exerted.
Referring to fig. 7, the width of the reinforced buckling restrained plate 3 is not less than that of the damping plate group, so that a part which is not overlapped with the damping plate group is reserved on the plate edge, and a bolt connecting hole 3-1 for connecting the upper and lower layers of the reinforced buckling restrained plate 3 and a protrusion 3-2 for improving the out-of-plane buckling capacity of the reinforced buckling restrained plate 3 are formed.
The reinforced buckling restrained panels 3 are arranged at the outer sides of the arch-shaped weakened areas of the upper and lower layers of limiting composition boards 1. And bolt connecting holes 3-1 for connecting the upper and lower layers of reinforced buckling restrained plates 3 are formed in the non-overlapped parts of the plate edges, the limiting combination plate 1 and the arch-shaped weakened SMA spliced plate 2. The reinforced buckling restrained plate 3 is connected to the outer side of the damping plate group, and a plurality of groups of protrusions 3-2 are arranged on the outer side of the damping plate group, so that the buckling restrained plate is reinforced. The common bolt 5 sequentially passes through the bolt connecting holes 3-1 of the upper and lower layers of the reinforced buckling restrained panels 3 to realize the connection of the upper and lower layers of the reinforced buckling restrained panels 3 so as to ensure the cooperative stress of the arch-shaped weakened area, prevent out-of-plane buckling and simultaneously not influence the relative sliding between the panels.
The high-strength bolts 4 pass through the first bolt connecting holes 11-2 of the upper layer of L-shaped slotted steel plate 11 and the lower layer of L-shaped slotted steel plate 11 and the third bolt connecting holes 21-1 of the arched unilateral weakening SMA plate 21 to realize the connection between the interiors of the damping plate groups. The high-strength bolt realizes the connection of the damping plate group and other structural members in the structure through the second bolt connecting holes 11-3 of the upper and lower layers of L-shaped slotted steel plates 11 and the bolt connecting holes formed in other structural members.
Referring to fig. 1 or fig. 2 and fig. 6, the upper and lower layers of the limiting composition board 1 are arch weakening SMA split plates 2, and the upper and lower layers of the limiting composition board 1 are symmetrical about the axis of the middle layer. The high-strength bolts 4 sequentially pass through the first bolt connecting hole 11-2 of the upper-layer limiting combined plate, the third bolt connecting hole 21-1 and the first bolt connecting hole 11-2 of the lower-layer limiting combined plate to realize the connection among the damping plate groups. The two groups of reinforced buckling restrained plates 3 are respectively arranged at the outer sides of the arch weakening areas of the upper limiting composition plate 1 and the lower limiting composition plate 1, and the plurality of common bolts 5 sequentially pass through the bolt connecting holes 3-1 of the upper reinforced buckling restrained plate 3 and the lower reinforced buckling restrained plate 3 to realize the connection between the two groups of reinforced buckling restrained plates.
Claims (5)
1. A damping plate group with multi-step yield and deformation restorable functions is characterized by comprising an arch weakened SMA (shape memory alloy) spliced plate (2), wherein the arch weakened SMA spliced plate (2) is clamped between an upper limiting combined plate (1) and a lower limiting combined plate (1); the limiting combination plate (1) and the outer side of the middle part of the arch weakening SMA composite plate (2) are clamped and fixed by the outermost reinforced buckling constraint plate (3); the limiting combination plate (1) comprises L-shaped slotted steel plates (11) which are fixedly connected with two ends of the arch weakening SMA composite plate (2) respectively at two sides, an arch weakening low-yield-point steel plate (12) is connected between the L-shaped slotted steel plates (11) in a clamping manner, and the arch weakening low-yield-point steel plate (12) is positioned at the outer side of the arch weakening SMA composite plate (2); the arch weakening SMA composite plate (2) is formed by splicing two arch single-side weakening SMA plates (21) through one non-weakening side, the two arch single-side weakening SMA plates (21) are symmetrically arranged, the arch weakening sides are positioned on the outer side, and the non-weakening sides are matched with each other; the arch-shaped weakened low-yield-point steel plate (12) covers the inner side between the two arch-shaped single-side weakened SMA plates (21); the upper and lower outermost reinforced buckling restrained plates (3) are mutually connected and fixed through bolts; the end part of the L-shaped slotted steel plate (11) is provided with a slot, the side wall of the slot is convexly provided with a convex curve (11-1), and the end part of the arch-shaped weakened low-yield-point steel plate (12) is concavely provided with a groove (12-1) matched with the convex curve (11-1); the end part of the L-shaped slotted steel plate (11) provided with the slotted side plate is provided with a first bolt connecting hole (11-2) for connecting an arched single-side weakened SMA plate (21), and the other side plate is provided with a second bolt connecting hole (11-3); a third bolt connecting hole (21-1) is formed in the arched single-side weakened SMA plate (21); the high-strength bolt (4) penetrates through the first bolt connecting hole (11-2) and the third bolt connecting hole (21-1) to fixedly connect the upper layer of L-shaped slotted steel plate (11) and the lower layer of L-shaped slotted steel plate with the arched single-side weakened SMA plate (21).
2. The damping plate set with multi-step yield and deformation restorable functions as claimed in claim 1, wherein the convex curves (11-1) are rounded convex curves, the grooves (12-1) are rounded grooves, and the radius of a circle corresponding to a rounded corner is 1.2-1.5 times the thickness of the arch-weakened low-yield-point steel plate (12).
3. The damping plate set with multi-step yield and deformation restorable functions as claimed in claim 1, wherein the arch-weakened low-yield-point steel plate (12) is made of low-yield-point steel with a yield stress ranging from 100MPa to 160MPa, and two sides of the middle section of the arch-weakened low-yield-point steel plate (12) are both arch-weakened to form an arch-weakened surface.
4. The damping plate group with multi-step yield and deformation restorable function as claimed in claim 3, wherein the weakening surface of the arched single-side weakening SMA plate (21) is provided with a slot-shaped hole (21-2) to realize secondary weakening; and third bolt connecting holes (21-1) for connecting the damping plate groups are formed at two ends of the arched single-side weakened SMA plate (21).
5. The damping plate group with multi-step yielding and deformation restorable according to claim 3, wherein the buckling-restrained reinforcing plate (3) is arranged outside the arch-shaped weakening plane; bolt connecting holes (3-1) are formed in the plate edge parts where the upper and lower layers of reinforced buckling constraint plates (3) are not overlapped with the limiting combination plate (1) and the arch-shaped weakened SMA composite plate (2); a common bolt (5) penetrates through the bolt connecting hole (3-1) to connect and fix the upper and lower layers of the reinforced buckling restrained plates (3); the outer surface of the reinforced buckling restrained plate (3) is provided with a plurality of groups of bulges (3-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110917703.0A CN113719177B (en) | 2021-08-11 | 2021-08-11 | Damping plate group with multi-stage yielding and deformation restorable functions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110917703.0A CN113719177B (en) | 2021-08-11 | 2021-08-11 | Damping plate group with multi-stage yielding and deformation restorable functions |
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| CN113719177B true CN113719177B (en) | 2022-08-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939137A (en) * | 2017-12-27 | 2018-04-20 | 华侨大学 | A kind of marmem piezoelectric friction damper device |
| CN113356383B (en) * | 2021-05-24 | 2022-08-26 | 重庆大学 | Sleeve type self-resetting damper with shape memory wire and plate set |
| CN115217234B (en) * | 2022-08-08 | 2023-06-27 | 西安交通大学 | Multi-stage energy dissipation support combined by friction damper and buckling restrained brace |
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| JPH08252792A (en) * | 1995-03-16 | 1996-10-01 | Olympus Optical Co Ltd | Shape memory alloy manipulator |
| WO1998057014A1 (en) * | 1997-06-12 | 1998-12-17 | Hamid Davoodi | Building system using shape memory alloy members |
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