CN111155819A - Self-resetting buckling-restrained brace based on SMA material and assembling method thereof - Google Patents
Self-resetting buckling-restrained brace based on SMA material and assembling method thereof Download PDFInfo
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- CN111155819A CN111155819A CN202010022548.1A CN202010022548A CN111155819A CN 111155819 A CN111155819 A CN 111155819A CN 202010022548 A CN202010022548 A CN 202010022548A CN 111155819 A CN111155819 A CN 111155819A
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- movable rod
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- inner sleeve
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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
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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
Abstract
The invention provides a self-resetting buckling restrained brace based on an SMA material and an assembly method thereof, wherein the brace comprises a buckling restrained brace part and a self-resetting part, and the buckling restrained brace part comprises an outer sleeve, I-shaped inner sleeve steel and an energy-consuming inner core; the self-reset part comprises a first movable rod, a second movable rod and an SMA reset rib; the assembling method comprises the following steps: sleeving the SMA reset ribs at corresponding positions of the two movable rods, tensioning, and installing the two movable rods at corresponding positions of the two limiting grooves of the I-shaped inner sleeve steel; welding the T-shaped upper part of the I-shaped inner sleeve steel with the T-shaped lower part of the I-shaped inner sleeve steel along a welding seam; welding a right T-shaped connecting plate and the right end of the I-shaped inner sleeve steel at the reserved groove; welding the right end of the energy-consuming inner core and the right end of the I-shaped inner sleeve steel at the reserved welding hole; after the two parts of the outer sleeve are assembled at corresponding positions, welding the two parts along a welding seam; welding the left end of the energy-consuming inner core and the left end of the outer sleeve at the reserved welding hole; and welding the left T-shaped connecting plate with the left end of the outer sleeve at the groove.
Description
Technical Field
The invention belongs to the technical field of seismic resistance and shock absorption of civil engineering structures, and particularly relates to a self-resetting buckling-restrained brace based on an SMA material and an assembly method thereof.
Background
The self-resetting buckling restrained brace is generally composed of two parts, namely a buckling restrained brace and a self-resetting system. The existing self-resetting buckling restrained brace of the type mostly has difference in buckling restrained brace parts, and the construction mode of the self-resetting system parts is basically the same.
However, as shown in fig. 1, the configuration of the existing self-resetting system (the end plates are added at the two ends of the inner and outer sleeves, and the SMA return ribs are anchored thereon) determines that the lengths of the SMA return ribs are approximately equal to the lengths of the outer sleeve in the anti-buckling support part. When the SMA resetting rib is not pretensioned or pretensioned by a small length, the characteristic that the resetting performance of the SMA resetting rib is not fully exerted when the designed length of the buckling restrained brace is long is achieved, so that the type of self-resetting buckling restrained brace wastes resetting materials, and the application range is narrow. When the SMA reset rib is subjected to sufficient pre-tensioning, because the cover plates at the two ends of the inner sleeve and the outer sleeve are lack of effective limiting devices, when an earthquake with higher strength occurs, the stretching amount of the SMA reset rib easily exceeds the maximum self-resetting stretching range, so that the SMA reset rib is in failure, and after a strong earthquake, the self-resetting buckling restrained brace of the type cannot effectively exert the self-resetting effect, so that the residual deformation of the structure is reduced.
Therefore, the construction mode of the self-resetting buckling restrained brace of the conventional self-resetting system causes that an engineer cannot control the length and the maximum deformation of the SMA resetting rib according to various actual engineering requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a self-resetting buckling restrained brace based on an SMA material and an assembling method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a self-resetting anti-buckling support based on an SMA material, which comprises an anti-buckling support part and a self-resetting part, wherein the anti-buckling support part comprises an outer sleeve, I-shaped inner sleeve steel and an energy-consuming inner core; the I-shaped inner sleeve steel is arranged in the outer sleeve; arranging the energy-consuming inner cores between the upper top plate of the I-shaped inner sleeve steel and the upper top surface of the outer sleeve and between the lower bottom plate of the I-shaped inner sleeve steel and the lower bottom surface of the outer sleeve; the self-reset part comprises a first movable rod, a second movable rod and an SMA reset rib; the SMA reset rib is sleeved on the first movable rod and the second movable rod, the first movable rod penetrates through one end of the buckling-restrained supporting part through a limiting groove, and the second movable rod penetrates through the other end of the buckling-restrained supporting part through a limiting groove; the limiting grooves are groove holes correspondingly formed in the upper top surface and the lower bottom surface of the outer sleeve and the middle plate of the I-shaped inner sleeve steel.
Based on the above, the shape of the slotted hole is a clip slotted hole with one end being an arc surface and the other end being a plane, wherein the plane parts of the clip slotted hole are oppositely arranged.
Based on the above, first movable rod with the second movable rod be with the one end of returning the shape slotted hole adaptation is the cambered surface other end and is planar quarter butt, first movable rod with the cambered surface part of second movable rod is offered and is used for the cover to establish the notch of SMA muscle that resets.
Based on the above, the I-shaped inner sleeve steel comprises a T-shaped upper part and a T-shaped lower part.
Based on the above, the upper top plate and the lower bottom plate at the right end of the I-shaped inner sleeve steel are provided with the welding holes for welding with the energy dissipation inner core, and the upper top surface and the lower bottom surface at the left end of the outer sleeve are both provided with the welding holes for welding with the energy dissipation inner core.
Based on the above, still include right T shape connecting plate and left T shape connecting plate, wherein, right T shape connecting plate with the right-hand member welding of I-shaped endotheca steel, left T shape connecting plate with the left end welding of outer tube.
Based on the above, all offer on first movable rod with the second movable rod and be used for fixing the fixed slot of SMA muscle that resets.
Based on the above, the SMA reset ribs which are sleeved on the first movable rod and the second movable rod are centrosymmetric with the middle plate of the I-shaped inner sleeve steel.
The invention further provides an assembling method of the self-resetting buckling restrained brace based on the SMA material, which comprises the following steps:
step 1, sleeving an SMA (shape memory alloy) reset rib at corresponding positions of a first movable rod and a second movable rod, tensioning the SMA reset rib, and installing the first movable rod and the second movable rod at corresponding positions of two limiting grooves of a T-shaped lower I-shaped internal sleeve steel part when the SMA reset rib is slightly longer than the distance between the two limiting grooves;
step 2, welding the T-shaped upper part of the I-shaped inner sleeve steel and the T-shaped lower part of the I-shaped inner sleeve steel along a welding seam;
step 5, welding the two parts of the outer sleeve along the welding seam after the two parts of the outer sleeve are assembled at the corresponding positions;
step 6, welding the left end of the energy-consuming inner core and the left end of the outer sleeve at a reserved welding hole;
and 7, welding the left T-shaped connecting plate and the left end of the outer sleeve at the groove.
Compared with the prior art, the invention has prominent substantive characteristics and remarkable progress, particularly:
(1) on one hand, the self-resetting buckling restrained brace inherits the original effect of the self-resetting buckling restrained brace, is used in a building steel frame supporting structure, firstly enters a plastic state under the action of a stronger earthquake to consume earthquake energy, and reduces the structural rigidity to reduce earthquake reaction, thereby protecting a structural main body. Have certain from reset capability simultaneously, reduce the structure and shake back residual deformation, prevent that the structure from collapsing, reduce the later stage and restore the degree of difficulty.
(2) The invention provides a novel self-resetting system on the other hand, and overcomes the defects that the self-resetting buckling restrained brace is poor in applicability and cannot fully exert the resetting performance of a resetting material due to the fact that the original self-resetting system cannot control the length and the maximum deformation of the SMA resetting rib according to actual engineering requirements.
Drawings
Fig. 1 is a schematic structural view of a conventional self-resetting system.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic diagram of the explosive structure of the present invention.
Fig. 4 is a schematic diagram for demonstrating the working principle of the present invention.
Fig. 5 is a schematic view of the assembly steps of the present invention.
In the figure: 11. an outer sleeve; 12. i-shaped inner sleeve steel; 13. an energy-consuming inner core; 21. a first movable bar; 22. a second movable bar; 23. an SMA reset rib; 24. a limiting groove; 25. welding holes; 3. a left T-shaped connecting plate; 4. right T shape connecting plate.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 2 and 3, a self-resetting buckling restrained brace based on SMA material comprises a buckling restrained brace portion, a self-resetting portion, a right T-shaped connecting plate 4 and a left T-shaped connecting plate 3, wherein,
the buckling restrained brace part comprises an outer sleeve 11, I-shaped inner sleeve steel 12 and an energy dissipation inner core 13; the I-shaped inner sleeve steel 12 is arranged in the outer sleeve 11; the energy dissipation inner cores 13 are arranged between the upper top plate of the I-shaped inner sleeve steel 12 and the upper top surface of the outer sleeve 11 and between the lower bottom plate of the I-shaped inner sleeve steel 12 and the lower bottom surface of the outer sleeve 11.
The self-reset part comprises a first movable rod 21, a second movable rod 22 and an SMA reset rib 23; SMA resets muscle 23 cover and establishes first movable rod 21 with on the second movable rod 22, first movable rod 21 wears to establish through spacing groove 24 the one end of buckling restrained brace portion, second movable rod 22 wears to establish through spacing groove 24 the other end of buckling restrained brace portion.
The limiting grooves 24 are groove holes correspondingly formed in the upper top surface and the lower bottom surface of the outer sleeve 11 and the middle plate of the i-shaped inner sleeve steel 12. Specifically, the i-shaped inner sleeve steel 12 includes a T-shaped upper member and a T-shaped lower member. In other embodiments, the slotted holes on the middle plate of the I-shaped inner sleeve steel 12 are formed by combining holes respectively formed on the T-shaped upper part and the T-shaped lower part.
The shape of the slotted hole is a clip slotted hole with one end being an arc surface and the other end being a plane, wherein the plane parts of the clip slotted hole are arranged oppositely. The first movable rod 21 and the second movable rod 22 are short rods, the one end of the short rods is an arc surface, the other end of the short rods is a plane, the arc surface of the first movable rod 21 is matched with the arc surface of the second movable rod 22, and the groove openings used for sleeving the SMA reset ribs 23 are formed in the arc surface of the first movable rod 21.
The upper top plate and the lower bottom plate at the right end of the I-shaped inner sleeve steel 12 are provided with welding holes used for being welded with the energy-consuming inner core, and the upper top surface and the lower bottom surface at the left end of the outer sleeve 11 are provided with welding holes used for being welded with the energy-consuming inner core. The right T-shaped connecting plate 4 is welded with the right end of the I-shaped inner sleeve steel 12, and the left T-shaped connecting plate 3 is welded with the left end of the outer sleeve 11. The first movable rod 21 and the second movable rod 22 are provided with fixing grooves for fixing the SMA reset ribs 23, and the SMA reset ribs 23 are sleeved on the first movable rod 21 and the second movable rod 22 and are used for the central symmetry of the middle plate of the I-shaped inner sleeve steel 12.
As shown in FIG. 4, the working process of the self-resetting buckling restrained brace based on the SMA material comprises the following steps:
(1) and (3) energy consumption stage:
when the earthquake response takes place for outside steel frame structure, the node transmits the displacement for from restoring to throne buckling restrained brace through controlling T shape connecting plate, controls T shape connecting plate and drives I-shaped endotheca steel 12 and outer tube 11 and take place the axial dislocation, then:
(a) because the left end and the right end of the energy-consuming inner core 13 are respectively welded with the left end of the outer sleeve 11 and the right end of the I-shaped inner sleeve steel 12, the axial dislocation of the I-shaped inner sleeve steel 12 and the outer sleeve 11 can drive the energy-consuming inner core 13 to be stretched or pressed, bent and plastically deformed, thereby consuming the earthquake energy; while reducing structural stiffness to reduce seismic response, thereby protecting the structural body.
(b) Meanwhile, the axial dislocation of the I-shaped inner sleeve steel 12 and the outer sleeve 11 can drive the SMA reset rib 23 to generate stretching deformation, and the effect of consuming seismic energy is also achieved.
(2) A self-resetting stage:
when the external force is reduced, the tensile deformation of the SMA reset rib 23 is gradually reduced by utilizing the superelasticity and shape memory characteristics of the SMA material, so that the axial dislocation of the I-shaped inner sleeve steel 12 and the outer sleeve 11 is gradually recovered, the residual deformation of the steel frame structure after the earthquake is reduced, the structure collapse is prevented, and the later repair difficulty is reduced.
According to the self-resetting buckling-restrained brace based on the SMA material, no matter the bracing member is tensioned or pressed, the SMA resetting rib is in a stretching state, and the resetting performance of the material can be fully utilized, wherein the design position and the length of the resetting rib of the SMA resetting rib are controllable, and the maximum elongation of the resetting rib is controllable.
As shown in fig. 5, the present invention also provides an assembling method of the self-resetting buckling restrained brace based on the SMA material, which comprises the following steps:
step 1, sleeving an SMA (shape memory alloy) reset rib at corresponding positions of a first movable rod and a second movable rod, tensioning the SMA reset rib, and installing the first movable rod and the second movable rod at corresponding positions of two limiting grooves of a T-shaped lower I-shaped internal sleeve steel part when the SMA reset rib is slightly longer than the distance between the two limiting grooves;
step 2, welding the T-shaped upper part of the I-shaped inner sleeve steel and the T-shaped lower part of the I-shaped inner sleeve steel along a welding seam;
step 5, welding the two parts of the outer sleeve along the welding seam after the two parts of the outer sleeve are assembled at the corresponding positions;
step 6, welding the left end of the energy-consuming inner core and the left end of the outer sleeve at a reserved welding hole;
and 7, welding the left T-shaped connecting plate and the left end of the outer sleeve at the groove.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. A self-resetting buckling restrained brace based on SMA material comprises a buckling restrained brace portion and a self-resetting portion, and is characterized in that:
the buckling restrained brace part comprises an outer sleeve, I-shaped inner sleeve steel and an energy dissipation inner core; the I-shaped inner sleeve steel is arranged in the outer sleeve; arranging the energy-consuming inner cores between the upper top plate of the I-shaped inner sleeve steel and the upper top surface of the outer sleeve and between the lower bottom plate of the I-shaped inner sleeve steel and the lower bottom surface of the outer sleeve;
the self-reset part comprises a first movable rod, a second movable rod and an SMA reset rib; the SMA reset rib is sleeved on the first movable rod and the second movable rod, the first movable rod penetrates through one end of the buckling-restrained supporting part through a limiting groove, and the second movable rod penetrates through the other end of the buckling-restrained supporting part through a limiting groove;
the limiting grooves are groove holes correspondingly formed in the upper top surface and the lower bottom surface of the outer sleeve and the middle plate of the I-shaped inner sleeve steel.
2. The SMA material-based self-resetting buckling restrained brace of claim 1, wherein: the shape of the slotted hole is a clip slotted hole with one end being an arc surface and the other end being a plane, wherein the plane parts of the clip slotted hole are arranged oppositely.
3. The SMA material-based self-resetting buckling restrained brace of claim 2, wherein: the first movable rod and the second movable rod are short rods, one end of each short rod is matched with the corresponding square groove, the other end of each short rod is a cambered surface, and the cambered surface of the first movable rod and the cambered surface of the second movable rod are provided with notch openings used for sleeving the SMA reset ribs.
4. The SMA material-based self-resetting buckling restrained brace of claim 3, wherein: the I-shaped inner sleeve steel comprises a T-shaped upper part and a T-shaped lower part.
5. The SMA material-based self-resetting buckling restrained brace of claim 4, wherein: the upper top plate and the lower bottom plate at the right end of the I-shaped inner sleeve steel are provided with welding holes used for being welded with the energy-consuming inner core, and the upper top surface and the lower bottom surface at the left end of the outer sleeve are both provided with welding holes used for being welded with the energy-consuming inner core.
6. The SMA material-based self-resetting buckling restrained brace of claim 5, wherein: the connecting structure is characterized by further comprising a right T-shaped connecting plate and a left T-shaped connecting plate, wherein the right T-shaped connecting plate is welded with the right end of the I-shaped inner sleeve steel, and the left T-shaped connecting plate is welded with the left end of the outer sleeve.
7. The SMA material-based self-resetting buckling restrained brace of claim 1, wherein: and the first movable rod and the second movable rod are provided with fixing grooves for fixing the SMA reset ribs.
8. The SMA material-based self-resetting buckling restrained brace of claim 7, wherein: the SMA reset ribs sleeved on the first movable rod and the second movable rod are in central symmetry with the middle plate of the I-shaped inner sleeve steel.
9. The assembly method of the self-resetting buckling restrained brace based on the SMA material, which is characterized by comprising the following steps of:
step 1, sleeving an SMA (shape memory alloy) reset rib at corresponding positions of a first movable rod and a second movable rod, tensioning the SMA reset rib, and installing the first movable rod and the second movable rod at corresponding positions of two limiting grooves of a T-shaped lower I-shaped internal sleeve steel part when the SMA reset rib is slightly longer than the distance between the two limiting grooves;
step 2, welding the T-shaped upper part of the I-shaped inner sleeve steel and the T-shaped lower part of the I-shaped inner sleeve steel along a welding seam;
step 3, welding the right T-shaped connecting plate and the right end of the I-shaped inner sleeve steel at the reserved groove;
step 4, welding the right end of the energy-consuming inner core and the right end of the I-shaped inner sleeve steel at the reserved welding hole;
step 5, welding the two parts of the outer sleeve along the welding seam after the two parts of the outer sleeve are assembled at the corresponding positions;
step 6, welding the left end of the energy-consuming inner core and the left end of the outer sleeve at a reserved welding hole;
and 7, welding the left T-shaped connecting plate and the left end of the outer sleeve at the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022548.1A CN111155819A (en) | 2020-01-09 | 2020-01-09 | Self-resetting buckling-restrained brace based on SMA material and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022548.1A CN111155819A (en) | 2020-01-09 | 2020-01-09 | Self-resetting buckling-restrained brace based on SMA material and assembling method thereof |
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| CN111155819A true CN111155819A (en) | 2020-05-15 |
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| CN202010022548.1A Pending CN111155819A (en) | 2020-01-09 | 2020-01-09 | Self-resetting buckling-restrained brace based on SMA material and assembling method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622535A (en) * | 2021-07-30 | 2021-11-09 | 兰州理工大学 | Self-resetting damper based on zinc-aluminum alloy and manufacturing method thereof |
| CN113846767A (en) * | 2021-10-14 | 2021-12-28 | 石家庄铁道大学 | Annular SMA cable-based graded energy-consumption type self-resetting buckling-restrained constraint device and manufacturing method thereof |
| CN115263018A (en) * | 2022-08-19 | 2022-11-01 | 北京工业大学 | Multistage-reset multistage-energy-consumption buckling-restrained brace |
-
2020
- 2020-01-09 CN CN202010022548.1A patent/CN111155819A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622535A (en) * | 2021-07-30 | 2021-11-09 | 兰州理工大学 | Self-resetting damper based on zinc-aluminum alloy and manufacturing method thereof |
| CN113846767A (en) * | 2021-10-14 | 2021-12-28 | 石家庄铁道大学 | Annular SMA cable-based graded energy-consumption type self-resetting buckling-restrained constraint device and manufacturing method thereof |
| CN115263018A (en) * | 2022-08-19 | 2022-11-01 | 北京工业大学 | Multistage-reset multistage-energy-consumption buckling-restrained brace |
| CN115263018B (en) * | 2022-08-19 | 2024-01-30 | 北京工业大学 | Multistage reset-multistage energy consumption buckling restrained brace |
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