CN112267591A - Self-resetting buckling-restrained brace with replaceable energy-consuming inner core - Google Patents
Self-resetting buckling-restrained brace with replaceable energy-consuming inner core Download PDFInfo
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- CN112267591A CN112267591A CN202011246168.2A CN202011246168A CN112267591A CN 112267591 A CN112267591 A CN 112267591A CN 202011246168 A CN202011246168 A CN 202011246168A CN 112267591 A CN112267591 A CN 112267591A
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- steel plate
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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 with a replaceable energy-consuming inner core, which comprises I-shaped steel, a rubber cushion layer, an SMA steel plate and an energy-consuming inner core, wherein the I-shaped steel is arranged on the inner surface of the rubber cushion layer; the I-shaped steel is taken as a core, and the rubber cushion layer, the SMA steel plate and the energy-consuming inner core are sequentially arranged on the upper layer and the lower layer of the central steel plate of the I-shaped steel; the end parts of the SMA steel plate and the energy-consuming inner core are fixed on the flange steel plate of the I-shaped steel. The energy-consuming inner core is replaceable, is not easy to damage, can be pulled and pressed, and enables the self-resetting buckling-restrained brace to have better plasticity; the toughness and the self-resetting capability of the support are improved by adding the rubber cushion layer on the SMA steel plate.
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 with a replaceable energy-consuming inner core.
Background
The buckling-restrained brace is one of common energy dissipation and shock absorption elements in civil engineering structures, and is characterized in that the buckling-restrained brace can achieve yielding without buckling when being pulled or pressed, is more stable in mechanical property compared with a traditional brace member, and can obtain higher rigidity and good hysteretic energy dissipation capacity through reasonable design, so that the buckling-restrained brace is widely researched and applied.
The common energy dissipation and shock absorption element is a Shape Memory Alloy (SMA) support member, and the Shape Memory Alloy which is a novel intelligent material with Shape Memory effect and hyperelasticity is adopted, so that self-resetting under larger plastic deformation can be realized while seismic energy is dissipated. However, the development or design structure of the common shape memory alloy support is complicated at present, or the common shape memory alloy support is mostly limited to wire materials, the output force is small and only can be pulled, so that the application range of the support is greatly limited.
Disclosure of Invention
The invention aims to provide a self-resetting anti-buckling support with a replaceable energy-consuming inner core aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a self-resetting buckling-restrained brace with a replaceable energy-consuming inner core comprises I-shaped steel, a rubber cushion layer, an SMA steel plate and an energy-consuming inner core;
the I-shaped steel is taken as a core, and the rubber cushion layer, the SMA steel plate and the energy-consuming inner core are sequentially arranged on the upper layer and the lower layer of the central steel plate of the I-shaped steel;
the end parts of the SMA steel plate and the energy-consuming inner core are fixed on the flange steel plate of the I-shaped steel.
Based on the above, the flange steel plate of the i-beam is provided with the buckling hole, the SMA steel plate is fixed on the flange steel plate of the i-beam in a buckling mode, and the rubber cushion layer is clamped between the central steel plate and the SMA steel plate.
Based on the above, one surface of the SMA steel plate, which is attached to the rubber cushion layer, is set to be a corrugated surface.
Based on the above, the thickness of the SMA steel plate is 1/2-3/4 of the thickness of the central steel plate of the I-shaped steel.
Based on the above, a gap is reserved between the SMA steel plate arranged between the two flange steel plates of the I-shaped steel and the inner side of each side flange steel plate of the I-shaped steel, and the width of the gap is 2% -3% of the length of the SMA steel plate.
Based on the above, the flange steel plate of the I-shaped steel is provided with the mounting hole, and the energy-consuming inner core is fixed on the flange steel plate of the I-shaped steel through the bolt.
Based on the above, the energy dissipation inner core comprises a corrugated sleeve, a limiting sleeve, a spring A, a spring B and a steel bar;
the spring B is arranged in the middle of the corrugated sleeve, and the springs A are respectively arranged on two sides in the corrugated sleeve;
two ends of the corrugated sleeve are respectively provided with a limiting sleeve;
the reinforcing steel bar is arranged in the spring A in an inserting manner;
the end part of the reinforcing steel bar, which extends into the corrugated sleeve, is provided with a blocking sheet, the spring B is arranged between the two blocking sheets, and the outer diameter of each blocking sheet is the same as that of the spring B and is larger than that of the spring A;
and the end part of the steel bar extending out of the limiting sleeve is provided with a thread.
Based on the above, the self-resetting buckling restrained brace comprises 6 energy-consuming inner cores which are uniformly distributed on the upper layer and the lower layer of the I-shaped steel; the corrugated sleeve and the SMA steel plate are separated by 10-20mm, two adjacent energy-consuming inner cores on each layer are separated by 10-20mm, the distance between the outermost energy-consuming inner core and the edge of the central steel plate is 10-20mm, and the distance between the outer side of each energy-consuming inner core and the highest position of the I-shaped steel flange steel plate is 10-20 mm.
Based on the above, two ends of the corrugated sleeve are respectively bolted with a limiting sleeve.
Based on the above, the diameter of the steel wire of the spring B is 1mm larger than that of the spring A, and the strength of the steel wire of the spring B is larger than that of the spring A.
Compared with the prior art, the self-resetting buckling-restrained brace has outstanding substantive characteristics and remarkable progress, and particularly, the energy-consuming inner core is replaceable, not easy to damage, capable of being pulled and pressed, and better in plasticity; the toughness and the self-resetting capability of the support are improved by adding the rubber cushion layer on the SMA steel plate.
Drawings
FIG. 1 is a schematic side view of the present invention.
Fig. 2 is a schematic front view of the present invention.
Fig. 3 is a schematic top view of the present invention.
Fig. 4 is a schematic structural diagram of the energy-dissipating core of the present invention.
In the figure: 1. i-shaped steel; 2. a rubber cushion layer; 3. an SMA steel plate; 4. an energy-consuming inner core; 5. a gap; 11. a central steel plate; 12. a flange steel plate; 41. a corrugated sleeve; 42. a limiting sleeve; 43. a spring A; 44. a spring B; 45. reinforcing steel bars; 46. a barrier sheet.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 1-4, a self-resetting buckling restrained brace with a replaceable energy-consuming inner core comprises an i-steel 1, a rubber cushion layer 2, an SMA steel plate 3 and an energy-consuming inner core 4; the I-shaped steel 1 is taken as a core, and the rubber cushion layer 2, the SMA steel plate 3 and the energy-consuming inner core 4 are sequentially arranged on the upper layer and the lower layer of the central steel plate 11 of the I-shaped steel 1; the end parts of the SMA steel plate 3 and the energy dissipation inner core 4 are fixed on a flange steel plate 12 of the I-shaped steel 1.
Specifically, a buckling hole is formed in a flange steel plate 12 of the i-beam 1, the SMA steel plate 3 is fixed on the flange steel plate 12 of the i-beam 1 in a buckling mode, and the rubber cushion layer 2 is clamped between the center steel plate 12 and the SMA steel plate 3.
The flange steel plate 12 of the I-shaped steel 1 is further provided with a mounting hole, and the energy-consuming inner core 4 is fixed on the flange steel plate 12 of the I-shaped steel 1 through a bolt. The energy dissipation inner core 4 comprises a corrugated sleeve 41, a limiting sleeve 42, a spring A43, a spring B44 and a steel bar 45; the spring B44 is arranged in the middle of the corrugated sleeve 41, and the springs A43 are respectively arranged on two sides of the corrugated sleeve 41; two ends of the corrugated sleeve 41 are respectively provided with a limiting sleeve 42; the steel bar rods 45 are inserted into the springs A43; the end part of the reinforcing steel bar 45 extending into the corrugated sleeve 41 is provided with a stop plate 46, the spring B44 is arranged between the two stop plates 46, and the outer diameter of each stop plate 46 is the same as that of the spring B44 and is larger than that of the spring A43; the end part of the steel bar 45 extending out of the limiting sleeve 42 is provided with threads.
In this embodiment, the mounting manner of the SMA steel plate has a reinforcing effect on the central steel plate, so that the yield resistance of the support is enhanced. The rubber cushion layer has certain elasticity and toughness, so that the integral toughness of the support is improved, and the shock insulation performance is effectively improved; by combining the self-resetting capability of the SMA steel plate, the self-resetting support can be used as a buffer belt of force during force transmission, and the integral self-resetting capability and the buckling resistance of the support are improved.
In the embodiment, the novel special energy-consuming inner cores are arranged on the upper surface and the lower surface of the SMA steel plate, the upper row and the lower row are combined, the energy-consuming inner cores are formed by the steel sleeve and the spring, the two sides are connected through the high-strength bolt, the purpose of replacement can be achieved, the support structure is complete in integrity, and the industrial processing and the mass production are easy.
When the self-resetting buckling-restrained brace is manufactured, the I-shaped steel is used as a core, and rubber cushion layers are added to the upper layer and the lower layer of the middle steel plate, so that rubber and the central steel plate of the I-shaped steel are bonded into a whole. Then adding SMA steel plates on the upper side and the lower side of the I-shaped steel, enabling flange steel plates on the two sides of the I-shaped steel to be tightly attached to the rubber cushion layer, forming a rectangular hole at the height, clamping the SMA steel plates into the hole, and enabling one side, which is attached to the rubber cushion layer, of the SMA steel plates to be provided with corrugations, so that the rubber cushion layer and the SMA steel plates can be tightly attached to prevent slippage; the SMA steel plate is clamped between the flange steel plates at two sides, and a certain gap 5 is reserved between the SMA steel plate and the inner side of the flange steel plate and is about 2% -3% of the total length of the SMA steel plate, so that the SMA steel plate is not pressed along with the central steel plate of the I-shaped steel when the support is pressed, but can be pulled along with the central steel plate of the I-shaped steel when the support is pulled, and the optimal use of the SMA steel plate is ensured. The thickness of the SMA steel plate should be 1/2 of the central plate of the I-steel not more than 3/4, so that the SMA steel plate can play a role in strengthening the buckling resistance of the central steel plate and playing a role in limiting.
During manufacturing, the position of the energy-consuming inner core is mainly the corrugated sleeve with the thickest center, and the distance between the outermost side of the corrugated sleeve and the SMA steel plate is about 10-20mm, so that the maximum space can be ensured when the structure is subjected to stress buckling and the SMA steel plate is subjected to self-resetting, and the influence of the energy-consuming inner core on the performance of the SMA can also be prevented. The width of two sides of a central steel plate of the I-steel is taken as a reference, energy-consuming inner cores are arranged at intervals of about 10-20mm, 3 energy-consuming inner cores are arranged in a row, the central steel plate of the I-steel is taken as the center, the upper and lower rows are arranged, the distance between the outermost energy-consuming inner core and the edge of the central steel plate is 10-20mm, the effect of each energy-consuming inner core is maximized, namely, each energy-consuming inner core is not influenced mutually and can consume energy together, and even if some energy-consuming inner cores are damaged, the effect of other. Similarly, the distance of 10-20mm is reserved between the energy-consuming inner cores on the inner side and the outer side and the highest position of the flange steel plate of the I-shaped steel, and when the corrugated sleeve is added to the buckling support, a certain space is ensured between the energy-consuming inner cores and the inner wall of the corrugated sleeve, so that the influence of the inner wall of the corrugated sleeve on the energy-consuming inner cores in a working state is prevented.
The power consumption inner core of this embodiment is when the preparation, place a long ripple sleeve at the middle part, spring B is placed to the sleeve innermost, spring A is placed to both sides, spring A respectively wears a reinforcing bar rod in the middle of both sides and respectively places a circular steel sheet (stop piece 46) with spring B adjacent one end, and weld with the reinforcing bar rod in order to guarantee to realize when carrying out pulling force or pressure to the reinforcing bar rod, can be to spring A pressurized, to spring B pressurized, and circular steel sheet is the same with spring B's outside diameter size, and 1-2mm bigger than spring A, guarantee reinforcing bar rod required angle and distance when the pressurized takes place the displacement apart from the distance of 3-5mm with ripple sleeve inner wall. A connector (a limiting sleeve 42) is formed by welding small cylindrical steel pipes and a circular terrace at two ends of the middle corrugated steel sleeve, a steel bar can pass through the connector, the distance between the steel bar and the inner wall of the small cylindrical steel pipe is 3-5mm, and the connector and the corrugated steel sleeve can be bolted, so that the purpose of replacement can be achieved if the springs inside are damaged. And finally, the steel bar and the I-shaped steel flange steel plate are connected by bolts, so that the energy-consuming inner core can be replaced. When the energy-consuming inner core is assembled, the diameter of a steel wire of the spring B is 1-2mm larger than that of the spring A, the strength of the spring B is also larger than that of the spring A, the spring B and the spring A are in a state of applying acting force mutually during assembly, the balance state of the spring B and the spring A is guaranteed, the steel bar can be in a tightened state after the assembly is completed, and then two ends of the steel bar are connected through bolts.
The energy consumption inner core of this embodiment, inside middle spring B that is, both sides cover is spring A at the reinforcing bar rod, and corrugated sleeve is sheathe in to outmost, and the piece that blocks that links to each other with the reinforcing bar rod in addition all leaves a certain distance with the sleeve inner wall and guarantees to take place relative displacement, and spring B's intensity is greater than spring A's intensity, and the extreme strain that the energy consumption inner core of tension side reached the spring earlier than the pressurized side. When the support is bent, the spring A is stressed by the energy dissipation inner core on the tension side, and the spring B is stressed by the energy dissipation inner core on the compression side. Because the energy consumption inner core can offset the pulling force and also can offset the pressure, and the energy consumption inner core is that the sleeve structure is not fragile, can change like this and can practice thrift a lot of steel after the spring of energy consumption inner core destroys, and the spring itself has certain effect that resets moreover, makes the reset capability of overall structure obtain very big promotion. When the support is bent, the maximum energy consumption can be achieved, and the integral plasticity and the resetting capability of the support are greatly improved.
And (3) stress analysis: when the structure is in a state of being stressed by axial pressure, in an elastic stage, the central steel plate of the I-shaped steel is mainly used for resisting axial force, the rubber cushion layers and the SMA steel plates on the two sides of the central steel plate are used for limiting the buckling of the central steel plate of the I-shaped steel, and when the central steel plate is buckled and displaced, the flange steel plates on the two sides are driven, so that the energy-consuming inner core works to consume energy; when the axial force is unloaded, the support returns to the previous state due to the restoring force of the spring, and the self-resetting effect is achieved. When the axial tension is received, the central steel plate can be restrained by buckling together with the rubber cushion layers on the two sides of the central steel plate of the I-shaped steel and the SMA steel plate, the rubber cushion layers can provide certain buffering capacity, the SMA steel plate can provide resetting capacity with the rubber cushion layers after the force is unloaded under the condition of tension, and the spring of the energy-consuming inner core can consume energy and simultaneously provide self-resetting capacity with the SMA steel plate and the rubber cushion layers as well as compression. In practical situations, there are lateral pulling forces or pressing forces, which may cause, for example, one side of the structure to be pulled and one side to be pressed, the pressed side is mainly subjected to pressure energy consumption by the high-strength central spring inside the inner core, and the pulled side is subjected to energy consumption and restoration by the springs on both sides of the energy-consuming inner core, the SMA steel plate and the rubber cushion layer, and when the force is unloaded, the spring, the SMA steel plate and the rubber cushion layer are subjected to restoration.
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 (10)
1. The utility model provides a removable power consumption inner core from restoring to throne buckling restrained brace which characterized in that: the energy-saving steel plate comprises I-shaped steel, a rubber cushion layer, an SMA steel plate and an energy-consuming inner core;
the I-shaped steel is taken as a core, and the rubber cushion layer, the SMA steel plate and the energy-consuming inner core are sequentially arranged on the upper layer and the lower layer of the central steel plate of the I-shaped steel;
the end parts of the SMA steel plate and the energy-consuming inner core are fixed on the flange steel plate of the I-shaped steel.
2. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 1, wherein: the flange steel plate of the I-shaped steel is provided with a buckling hole, the SMA steel plate is fixed on the flange steel plate of the I-shaped steel in a buckling mode, and the rubber cushion layer is clamped between the central steel plate and the SMA steel plate.
3. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 2, wherein: one surface of the SMA steel plate, which is attached to the rubber cushion layer, is set to be a corrugated surface.
4. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 3, wherein: the thickness of the SMA steel plate is 1/2-3/4 of that of the central steel plate of the I-shaped steel.
5. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 4, wherein: gaps are reserved between the SMA steel plates arranged between the two flange steel plates of the I-shaped steel and the inner sides of the flange steel plates on each side of the I-shaped steel, and the width of each gap is 2% -3% of the length of each SMA steel plate.
6. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 1, wherein: the flange steel plate of the I-shaped steel is provided with a mounting hole, and the energy-consuming inner core is fixed on the flange steel plate of the I-shaped steel through a bolt.
7. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 6, wherein: the energy dissipation inner core comprises a corrugated sleeve, a limiting sleeve, a spring A, a spring B and a steel bar;
the spring B is arranged in the middle of the corrugated sleeve, and the springs A are respectively arranged on two sides in the corrugated sleeve;
two ends of the corrugated sleeve are respectively provided with a limiting sleeve;
the reinforcing steel bar is arranged in the spring A in an inserting manner;
the end part of the reinforcing steel bar, which extends into the corrugated sleeve, is provided with a blocking sheet, the spring B is arranged between the two blocking sheets, and the outer diameter of each blocking sheet is the same as that of the spring B and is larger than that of the spring A;
and the end part of the steel bar extending out of the limiting sleeve is provided with a thread.
8. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 6, wherein: the self-resetting buckling-restrained brace comprises 6 energy-consuming inner cores which are uniformly distributed on the upper layer and the lower layer of the I-shaped steel; the corrugated sleeve and the SMA steel plate are separated by 10-20mm, two adjacent energy-consuming inner cores on each layer are separated by 10-20mm, the distance between the outermost energy-consuming inner core and the edge of the central steel plate is 10-20mm, and the distance between the outer side of each energy-consuming inner core and the highest position of the I-shaped steel flange steel plate is 10-20 mm.
9. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 7, wherein: and two ends of the corrugated sleeve are respectively bolted with a limiting sleeve.
10. The self-resetting buckling restrained brace with replaceable energy-consuming inner core as claimed in claim 7, wherein: the diameter of the steel wire of the spring B is 1mm larger than that of the spring A, and the strength of the steel wire of the spring B is larger than that of the spring A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246168.2A CN112267591A (en) | 2020-11-10 | 2020-11-10 | Self-resetting buckling-restrained brace with replaceable energy-consuming inner core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246168.2A CN112267591A (en) | 2020-11-10 | 2020-11-10 | Self-resetting buckling-restrained brace with replaceable energy-consuming inner core |
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| Publication Number | Publication Date |
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| CN112267591A true CN112267591A (en) | 2021-01-26 |
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| CN202011246168.2A Pending CN112267591A (en) | 2020-11-10 | 2020-11-10 | Self-resetting buckling-restrained brace with replaceable energy-consuming inner core |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982197A (en) * | 2021-03-17 | 2021-06-18 | 黄河水利职业技术学院 | I-steel stress system reinforcing apparatus |
| CN113062455A (en) * | 2021-03-31 | 2021-07-02 | 西南科技大学 | Steel structure node energy absorption device |
| CN114482321A (en) * | 2022-03-30 | 2022-05-13 | 中建三局第一建设工程有限责任公司 | Support device and lateral force resisting component |
-
2020
- 2020-11-10 CN CN202011246168.2A patent/CN112267591A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982197A (en) * | 2021-03-17 | 2021-06-18 | 黄河水利职业技术学院 | I-steel stress system reinforcing apparatus |
| CN113062455A (en) * | 2021-03-31 | 2021-07-02 | 西南科技大学 | Steel structure node energy absorption device |
| CN114482321A (en) * | 2022-03-30 | 2022-05-13 | 中建三局第一建设工程有限责任公司 | Support device and lateral force resisting component |
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