CN113982135A - Load-multistage energy dissipation buckling restrained brace with friction damper - Google Patents
Load-multistage energy dissipation buckling restrained brace with friction damper Download PDFInfo
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- CN113982135A CN113982135A CN202111359616.4A CN202111359616A CN113982135A CN 113982135 A CN113982135 A CN 113982135A CN 202111359616 A CN202111359616 A CN 202111359616A CN 113982135 A CN113982135 A CN 113982135A
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- variable cross
- stiffening rib
- energy
- friction
- restrained brace
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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
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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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Dampers (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a bearing-multistage energy dissipation buckling restrained brace with a friction damper. The buckling restrained brace element comprises an energy dissipation core plate, a non-adhesive material, a filling material, an outer restraining component, a stiffening rib and a sealing plate; the friction damper element includes a friction material, a pressure plate, a bolt, and a nut. The friction damper element is assembled with the stiffening ribs of the buckling restrained brace element in a bolt-up connection manner to form the buckling restrained brace member with two-step yielding. According to the invention, the friction damper and the buckling restrained brace are connected in parallel, so that the friction damper can generate relative displacement to enter an energy consumption state when the energy consumption core plate is elastically deformed, the defect that the buckling restrained brace cannot consume energy in an elastic stage is overcome, the staged energy consumption under different earthquake actions is taken into consideration, the whole process energy consumption capability of the brace is improved, and the structural damage under the earthquake action is reduced.
Description
Technical Field
The invention belongs to the technical field of shock absorption structures, and particularly relates to a bearing-multistage energy dissipation buckling restrained brace with a friction damper.
Background
With the continuous development of academic research and engineering technology in the earthquake field in China, in the field of building structures in recent years, damping devices are structurally arranged to consume earthquake input energy, and the aim of reducing earthquake response of a main structure is fulfilled. Buckling restrained braces are increasingly used in engineering and have achieved significant success.
Under the compression action of the common steel support, buckling instability is easy to occur because no restraining component restrains the deformation of the common steel support. The buckling restrained brace is connected with the frame beam and the frame column through the connecting nodes, and the energy dissipation core plate is buckled under the action of the earthquake so as to dissipate the energy of the input structure. However, in order to avoid the low-cycle fatigue failure of the buckling restrained brace, the buckling restrained brace is designed to be an elastic brace under the condition of a frequent earthquake, but the buckling restrained brace keeps an elastic state and cannot dissipate the energy input by the earthquake. Meanwhile, the rigidity of the structure is improved, and the structure can be subjected to larger earthquake action.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a bearing-multistage energy dissipation buckling restrained brace with a friction damper. Under a small earthquake, only the friction damper generates relative displacement and enters yielding to participate in energy consumption, and the energy consumption core plate keeps an elastic state; under the action of medium and large earthquakes, the energy consumption core plate enters a yield state, and the energy consumption core plate and the friction damper jointly participate in energy consumption to dissipate energy input under the action of earthquakes.
The purpose of the invention is realized as follows: a load-bearing multi-stage energy dissipation buckling restrained brace with a friction damper comprises buckling restrained brace elements and friction damper elements, wherein the buckling restrained brace elements comprise energy dissipation core plates (3), filling materials (5), outer restraining components (6), edge sealing plates (7), first variable cross-section stiffening ribs (1-1) and second variable cross-section stiffening ribs (1-2); the outer surface of the energy dissipation core plate (3) is coated with a non-adhesive material (4), the edge sealing plate (7) is arranged at the end part of the outer constraint component (6), and the energy dissipation core plate (3) is positioned in the outer constraint component (6); the energy-consuming core plate (3) penetrates through the edge sealing plate (7), the filling material (5) is filled between the energy-consuming core plate (3) and the external constraint component (6), the first variable cross-section stiffening rib (1-1) and the second variable cross-section stiffening rib (1-2) are respectively positioned at two ends of the energy-consuming core plate (3), and the first variable cross-section stiffening rib (1-1) and the second variable cross-section stiffening rib (1-2) are distributed at two sides of the energy-consuming core plate (3); the friction damper component comprises a friction material (8) and a pressing plate (9), the pressing plate (9) is located on two sides of a second variable cross-section stiffening rib (1-2), the friction material (8) is located between the pressing plate (9) and the second variable cross-section stiffening rib (1-2), two ends of the friction material (8) are provided with baffle plates (10), the baffle plates (10) are fixedly connected with the pressing plate (9), the friction material (8), the pressing plate (9) and the second variable cross-section stiffening rib (1-2) are connected through bolts (2-1) and nuts (2-2), the second variable cross-section stiffening rib (1-2) is provided with a movable groove, and the bolts (2-1) penetrate through the movable groove.
Furthermore, one end of the external constraint component (6) close to the first variable cross-section stiffening rib (1-1) is provided with a first clamping groove, the first variable cross-section stiffening rib (1-1) can be inserted into the first clamping groove, one end of the external constraint component (6) close to the second variable cross-section stiffening rib (1-2) is provided with a second clamping groove, and the pressing plate (9) can be inserted into the second clamping groove.
Furthermore, one end of the energy consumption core plate (3) close to the first variable cross-section stiffening rib (1-1) and the first variable cross-section stiffening rib (1-1) are both provided with an enlarged cross section, and the enlarged cross section is welded with the outer constraint component (6).
Furthermore, the first variable cross-section stiffening rib (1-1) and the second variable cross-section stiffening rib (1-2) are welded with the energy dissipation core plate (3), and the baffle (10) is welded with the side face of the pressure plate (9).
Furthermore, the number of the bolts (2-1) and the number of the nuts (2-2) are 1-8, and bolt holes matched with the bolts are formed in the pressure plate (9), the friction material (8) and the second variable cross-section stiffening rib (1-2).
Further, the filling material (5) is concrete or mortar.
Furthermore, the edge sealing plate (7) is provided with a through hole, and the through hole can be used for the reserved energy consumption core plate (3), the second variable cross-section stiffening rib (1-2) and the pressing plate (9) to pass through.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
1. on the basis of the traditional buckling restrained brace, a friction damper is connected in parallel, and on the premise of not influencing the mechanical property of the original buckling restrained brace, the double-stage yielding energy consumption is realized, and the whole-process energy consumption capability of the brace is improved;
2. the buckling restrained brace and the friction damper can be respectively processed, so that the manufacturing period is shortened, and the batch production is facilitated;
3. the friction damper can generate friction energy consumption under small relative displacement when acting under the action of external force, and is beneficial to reducing the earthquake action of the structure under small earthquake;
4. the requirements on first-order yield energy consumption can be met by adjusting the type of the friction material, the size of the preset pretightening force and the number of bolts;
5. the friction damper has smaller rigidity after overcoming the sliding friction force, and has little influence on the rigidity of the traditional buckling restrained brace component;
6. the friction damper can keep a relatively stable energy consumption effect when the displacement is large, and can continue to work after the energy consumption core plate of the buckling restrained brace is broken.
Drawings
FIG. 1 is a perspective view of the structure of embodiment 1 of the present invention;
FIG. 2 is a front view of embodiment 1 of the present invention;
FIG. 3 is an exploded view of embodiment 1 of the present invention;
FIG. 4 is a partial structural view of embodiment 1 of the present invention;
FIG. 5 is a structural view of a stiffening rib with a slotted hole and a variable cross-section according to embodiment 1 of the present invention;
FIG. 6 is a structural view of a friction damper according to embodiment 1 of the invention;
FIG. 7 is a schematic view showing the connection of a pressure plate and a friction material according to example 1 of the present invention;
FIG. 8 is a perspective view of example 2 of the present invention.
In the figure: 1-1, a first variable cross-section stiffener; 1-2, a second variable cross-section stiffening rib; 2-1, bolts; 2-2, a nut; 3. an energy consumption core board; 4. no adhesive material; 5. a filler material; 6. an outer restraining member; 7. edge sealing plates; 8. a friction material; 9. pressing a plate; 10. and a baffle plate.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description, with reference to the drawings in the embodiments of the present invention, clearly and completely describes the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1-7, the present embodiment is a load-bearing multi-stage energy-dissipating buckling-restrained brace with friction dampers, which comprises buckling-restrained brace elements and friction damper elements, wherein the buckling-restrained brace elements comprise an energy-dissipating core plate 3, a filling material 5, an outer restraining member 6, a flange plate 7, a first variable cross-section stiffening rib 1-1 and a second variable cross-section stiffening rib 1-2; the cross section of the energy-consuming core plate 3 is in a straight shape, a cross shape or an I shape, the outer surface of the energy-consuming core plate 3 is coated with a non-adhesive material 4, an outer constraint component 6 is an integral sleeve formed by welding four steel plates, the edge sealing plate 7 is arranged at the end part of the outer constraint component 6, and the energy-consuming core plate 3 is positioned in the outer constraint component 6; the energy-consuming core plate 3 penetrates through the edge sealing plate 7, the filling material 5 is concrete or mortar and is filled between the energy-consuming core plate 3 and the external constraint component 6, the first variable cross-section stiffening rib 1-1 and the second variable cross-section stiffening rib 1-2 are respectively welded at two ends of the energy-consuming core plate 3, the first variable cross-section stiffening rib 1-1 and the second variable cross-section stiffening rib 1-2 are distributed at two sides of the energy-consuming core plate 3, one end of the external constraint component 6, which is close to the first variable cross-section stiffening rib 1-1, is provided with a first clamping groove, and the first variable cross-section stiffening rib 1-1 can be inserted into the first clamping groove;
the friction damper element comprises a friction material 8 and a pressure plate 9, the friction material 8 is a metal friction plate or a non-metal friction plate or a brake plate or a composite friction plate, the pressure plate 9 is positioned on two sides of the second variable cross-section stiffening rib 1-2, one end, close to the second variable cross-section stiffening rib 1-2, of the external restraint member 6 is provided with a second clamping groove, the pressure plate 9 can be inserted into the second clamping groove, the friction material 8 is positioned between the pressure plate 9 and the second variable cross-section stiffening rib 1-2, two ends of the friction material 8 are provided with baffle plates 10, the thickness of each baffle plate 10 is smaller than that of the friction material 8, the baffle plates 10 are welded with the pressure plate 9, and the baffle plates 10 clamp the friction material 8 to play a role in mechanical fixation; the friction material 8, the pressure plate 9 and the second variable cross-section stiffening rib 1-2 are connected through 2 groups of bolts 2-1 and nuts 2-2, and preset pretightening force is applied to finally form a buckling restrained brace member with double-step yielding; one end of the buckling restrained brace component can be connected with building structures such as beams and columns of a building through the energy dissipation core plate 3, the first variable cross-section stiffening rib 1-1 and the second variable cross-section stiffening rib 1-2, and the other end of the buckling restrained brace component can be connected with building structures such as beams and columns of the building through the energy dissipation core plate 3 and the second variable cross-section stiffening rib 1-2.
Bolt holes matched with the bolts are formed in the pressure plate 9, the friction material 8 and the second variable cross-section stiffening rib 1-2, movable grooves are formed in the second variable cross-section stiffening rib 1-2, the length of each movable groove is larger than the distance between the two bolt holes, a certain movable space is provided, and the bolts 2-1 penetrate through the bolt holes and the movable grooves.
Furthermore, one end of the energy consumption core plate 3 close to the first variable cross-section stiffening rib 1-1 and the first variable cross-section stiffening rib 1-1 are both provided with an enlarged cross section, and the enlarged cross section is welded with the external constraint component 6, so that the overall stability is improved, and the stress balance of the component is ensured.
Furthermore, the edge sealing plate 7 is provided with a through hole, the through hole can be used for the reserved energy consumption core plate 3, the second variable cross-section stiffening rib 1-2 and the pressing plate 9 to pass through, and the pressing plate 9 is welded with the outer constraint component 6 to ensure the stress balance of the component.
Example 2:
as shown in fig. 8, the present embodiment is a friction damper bearing-multistage energy dissipation buckling restrained brace, which comprises buckling restrained brace elements and friction damper elements, wherein the buckling restrained brace elements comprise an energy dissipation core plate 3, a filling material 5, an outer restraining member 6, a side sealing plate 7 and second variable cross-section stiffening ribs 1-2; the cross section of the energy-consuming core plate 3 is in a straight shape, a cross shape or an I shape, the outer surface of the energy-consuming core plate 3 is coated with non-bonding materials 4, an outer constraint component 6 is an integral sleeve formed by welding four steel plates, the edge sealing plates 7 are arranged at two ends of the outer constraint component 6, and the energy-consuming core plate 3 is positioned in the outer constraint component 6; two ends of the energy-consuming core plate 3 penetrate through the edge sealing plates 7, the filling material 5 is concrete or mortar and is filled between the energy-consuming core plate 3 and the external restraint member 6, the second variable cross-section stiffening ribs 1-2 are welded at two ends of the energy-consuming core plate 3, and the second variable cross-section stiffening ribs 1-2 are distributed at two sides of the energy-consuming core plate 3;
the friction damper element comprises a friction material 8 and a pressure plate 9, the friction material 8 is a metal friction plate or a non-metal friction plate or a brake plate or a composite friction plate, the pressure plate 9 is positioned on two sides of the second variable cross-section stiffening rib 1-2, one end, close to the second variable cross-section stiffening rib 1-2, of the external restraint member 6 is provided with a second clamping groove, the pressure plate 9 can be inserted into the second clamping groove, the friction material 8 is positioned between the pressure plate 9 and the second variable cross-section stiffening rib 1-2, two ends of the friction material 8 are provided with baffle plates 10, the thickness of each baffle plate 10 is smaller than that of the friction material 8, the baffle plates 10 are welded with the pressure plate 9, and the baffle plates 10 clamp the friction material 8 to play a role in mechanical fixation; the friction material 8, the pressure plate 9 and the second variable cross-section stiffening rib 1-2 are connected through 2 groups of bolts 2-1 and nuts 2-2, and preset pretightening force is applied; two ends of the buckling restrained brace component can be connected with building structures such as beams, columns and the like of a building through the energy dissipation core plate 3 and the second variable cross-section stiffening ribs 1-2.
Bolt holes matched with the bolts are formed in the pressure plate 9, the friction material 8 and the second variable cross-section stiffening rib 1-2, movable grooves are formed in the second variable cross-section stiffening rib 1-2, the length of each movable groove is larger than the distance between the two bolt holes, a certain movable space is provided, and the bolts 2-1 penetrate through the bolt holes and the movable grooves.
Furthermore, the edge sealing plate 7 is provided with a through hole, the through hole can be used for the reserved energy consumption core plate 3, the second variable cross-section stiffening rib 1-2 and the pressing plate 9 to pass through, and the pressing plate 9 is welded with the outer constraint component 6 to ensure the stress balance of the component.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Claims (7)
1. A load-bearing multi-stage energy dissipation buckling restrained brace with a friction damper is characterized by comprising a buckling restrained brace element and a friction damper element, wherein the buckling restrained brace element comprises an energy dissipation core plate (3), a filling material (5), an outer restraining component (6), a side sealing plate (7), a first variable cross-section stiffening rib (1-1) and a second variable cross-section stiffening rib (1-2); the outer surface of the energy dissipation core plate (3) is coated with a non-adhesive material (4), the edge sealing plate (7) is arranged at the end part of the outer constraint component (6), and the energy dissipation core plate (3) is positioned in the outer constraint component (6); the energy-consuming core plate (3) penetrates through the edge sealing plate (7), the filling material (5) is filled between the energy-consuming core plate (3) and the external constraint component (6), the first variable cross-section stiffening rib (1-1) and the second variable cross-section stiffening rib (1-2) are respectively positioned at two ends of the energy-consuming core plate (3), and the first variable cross-section stiffening rib (1-1) and the second variable cross-section stiffening rib (1-2) are distributed at two sides of the energy-consuming core plate (3); the friction damper component comprises a friction material (8) and a pressing plate (9), the pressing plate (9) is located on two sides of a second variable cross-section stiffening rib (1-2), the friction material (8) is located between the pressing plate (9) and the second variable cross-section stiffening rib (1-2), two ends of the friction material (8) are provided with baffle plates (10), the baffle plates (10) are fixedly connected with the pressing plate (9), the friction material (8), the pressing plate (9) and the second variable cross-section stiffening rib (1-2) are connected through bolts (2-1) and nuts (2-2), the second variable cross-section stiffening rib (1-2) is provided with a movable groove, and the bolts (2-1) penetrate through the movable groove.
2. The load-bearing multi-stage energy dissipating buckling restrained brace with friction type damper as claimed in claim 1, wherein the end of the external restraining member (6) near the first variable cross section stiffening rib (1-1) is provided with a first slot into which the first variable cross section stiffening rib (1-1) can be inserted, the end of the external restraining member (6) near the second variable cross section stiffening rib (1-2) is provided with a second slot into which the pressure plate (9) can be inserted.
3. The load-bearing multi-stage energy dissipating buckling restrained brace with friction-type damper as claimed in claim 1, wherein the end of the energy dissipating core plate (3) close to the first variable cross section stiffening rib (1-1) and the first variable cross section stiffening rib (1-1) are provided with an enlarged cross section, and the enlarged cross section is welded with the outer restraining member (6).
4. The load-bearing multi-stage energy-dissipating buckling restrained brace with friction-type damper as claimed in claim 1, wherein the first variable cross-section stiffening rib (1-1) and the second variable cross-section stiffening rib (1-2) are welded to the energy dissipating core plate (3), and the baffle (10) is welded to the side of the pressure plate (9).
5. The load-bearing multi-stage energy-dissipating buckling restrained brace with the friction-type damper as claimed in claim 1, wherein the number of the bolts (2-1) and the nuts (2-2) is 1-8, and the pressure plate (9), the friction material (8) and the second variable cross-section stiffening rib (1-2) are provided with bolt holes matched with the bolts.
6. The load-bearing, multi-stage energy dissipating buckling restrained brace with friction type damper as claimed in claim 1, wherein said filling material (5) is concrete or mortar.
7. The load-bearing multi-stage energy-dissipating buckling restrained brace with friction-type damper as claimed in claim 1, wherein the edge-sealing plate (7) is provided with through holes for the reserved energy-dissipating core plate (3), the second variable cross-section stiffening ribs (1-2) and the pressure plate (9) to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359616.4A CN113982135A (en) | 2021-11-17 | 2021-11-17 | Load-multistage energy dissipation buckling restrained brace with friction damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111359616.4A CN113982135A (en) | 2021-11-17 | 2021-11-17 | Load-multistage energy dissipation buckling restrained brace with friction damper |
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| Publication Number | Publication Date |
|---|---|
| CN113982135A true CN113982135A (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111359616.4A Pending CN113982135A (en) | 2021-11-17 | 2021-11-17 | Load-multistage energy dissipation buckling restrained brace with friction damper |
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| CN (1) | CN113982135A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622761A (en) * | 2022-04-28 | 2022-06-14 | 震安科技股份有限公司 | Compound type frictional buckling restrained brace |
| CN115217234A (en) * | 2022-08-08 | 2022-10-21 | 西安交通大学 | Multistage energy dissipation brace combining friction damper and buckling restrained brace |
-
2021
- 2021-11-17 CN CN202111359616.4A patent/CN113982135A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622761A (en) * | 2022-04-28 | 2022-06-14 | 震安科技股份有限公司 | Compound type frictional buckling restrained brace |
| CN114622761B (en) * | 2022-04-28 | 2024-01-02 | 震安科技股份有限公司 | Composite friction buckling restrained brace |
| CN115217234A (en) * | 2022-08-08 | 2022-10-21 | 西安交通大学 | Multistage energy dissipation brace combining friction damper and buckling restrained brace |
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