CN114182843A - Buckling restrained brace adopting W-M fractal function - Google Patents
Buckling restrained brace adopting W-M fractal function Download PDFInfo
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- CN114182843A CN114182843A CN202111622326.4A CN202111622326A CN114182843A CN 114182843 A CN114182843 A CN 114182843A CN 202111622326 A CN202111622326 A CN 202111622326A CN 114182843 A CN114182843 A CN 114182843A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 135
- 239000010959 steel Substances 0.000 claims abstract description 135
- 230000007704 transition Effects 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 6
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 7
- 230000000452 restraining effect Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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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
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- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to the technical field of building construction, and discloses a buckling restrained brace adopting a W-M fractal function, which comprises a fractal core steel plate, wherein the top and bottom surfaces of the fractal core steel plate are respectively provided with a restrained channel steel, the top and bottom surfaces of the fractal core steel plate are respectively provided with a first deformation structure in a corrugated structure, and the steel surfaces of the two sides of the restrained channel steel, close to the side of the fractal core steel plate, are respectively provided with a second deformation structure matched with the first deformation structure on the corresponding side; the invention has the characteristics of capability of avoiding the damage of the end head and the connecting part, prolonged service life, light dead weight, low construction difficulty, high construction speed, difficult damage and easy replacement.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a buckling restrained brace adopting a W-M fractal function.
Background
The buckling restrained brace is a common energy-consuming and shock-absorbing component, can yield before a main body structure under a small earthquake, fully dissipates earthquake energy by virtue of the excellent hysteresis performance of the buckling restrained brace, and is widely applied to engineering structures. The buckling restrained brace has the working mechanism that the core steel brace provides bearing capacity, the outer sleeve provides lateral restraint, and buckling instability of the core unit before yielding is avoided. Compared with the common steel support, the stability coefficient is not considered under the compression working condition, so that the cross section utilization rate of the member can be improved to a certain extent. However, at present, the traditional buckling restrained brace has a single shape, and is easy to damage at the end and the connecting part, so that the bearing capacity is poor, and therefore, improvement is needed.
A utility model with Chinese patent publication No. CN208137166U, which discloses a buckling restrained brace of corrugated web H-shaped steel, comprising a core unit, a restraining unit and a sliding mechanism unit; the core unit comprises corrugated web plate H-shaped steel and flat web plate H-shaped steel; the cross section of a corrugated web plate of the corrugated web plate H-shaped steel is corrugated, and two ends of the corrugated web plate H-shaped steel are respectively fixedly connected with a flat web plate H-shaped steel for reinforcing the cross section to form a whole; the constraint unit is a cavity arranged around the core unit, and concrete is poured into the cavity; the flat web H-shaped steel at the two ends of the core unit passes through the two ends of the cavity; the sliding mechanism unit comprises unbonded expandable material wrapped on the surface of the core unit; through the arrangement, the buckling restrained brace can meet the requirement of higher bearing capacity, has better restraint effect, can reduce the burden of the outer sleeve, reduces the section of the sleeve and improves the economy; the buckling restrained brace also has the following problems:
(1) the problems of heavy weight, slow construction speed and higher construction difficulty exist due to the need of concrete filling and pouring;
(2) when the buckling restrained brace is installed on a structure needing energy dissipation and shock absorption, a welding process is needed, the welded connection part has the problem of stress concentration, and the buckling restrained brace is easy to damage and is not suitable to be replaced after being damaged;
(3) when the buckling restrained brace is stressed, the problem that the end head and the connecting part are damaged firstly can not be avoided.
Disclosure of Invention
In view of the above, the present invention provides a buckling restrained brace using a W-M fractal function.
In order to solve the technical problems, the technical scheme of the invention is as follows: the buckling restrained brace comprises a fractal core steel plate, wherein restraint channel steel is arranged on the top and bottom surfaces of the fractal core steel plate, first deformation structures in a corrugated structure are arranged on the top and bottom surfaces of the fractal core steel plate, and second deformation structures matched with the first deformation structures on the corresponding sides are arranged on steel surfaces, close to the sides of the fractal core steel plate, of the restraint channel steel on two sides.
Further, the first deformation structure is obtained by adopting a W-M fractal function, and the calculation formula is as follows:
wherein, the natural sequence number n is 1, 2, …, 100, x, y coordinates are not 0, D is 1.15, the contour space frequency γ is 1.5, and the characteristic scale coefficient G is 1.
Furthermore, the constraint channel steel is arranged in a U-shaped structure, the constraint channel steel is symmetrically arranged on the top bottom surface of the fractal core steel plate, gaps are reserved between steel surfaces of two sides of the constraint channel steel close to the fractal core steel plate and corresponding side plate surfaces of the fractal core steel plate, and bonding-free materials are filled in the gaps on the two sides.
Further, the thickness of the intermediate wall of the gap is 7%.
Furthermore, both sides of the fractal core steel plate are provided with constraint steel plates, and the constraint steel plates on both sides are respectively connected with the side walls of the corresponding sides of the constraint channel steel plates on both sides through penetrating high-strength bolts.
Furthermore, cross transition steel plates are connected to two end portions of the fractal core steel plate, and connecting bolts are connected to the cross transition steel plates in a threaded mode.
Furthermore, a compressible material layer is arranged on the plate wall of the side, close to the fractal core steel plate, of the cross transition steel plate on the two sides.
Compared with the prior art, the invention has the advantages that:
1. the first deformation structure is constructed by applying the W-M fractal function, so that the shape of the top and bottom surfaces of the fractal core steel plate is changed, the purpose of site-specific yielding can be achieved, namely, when the fractal core steel plate yields under stress, the fractal core steel plate begins to yield from the weak point of the first deformation structure, so that the first damage of the end head and the connection part of the buckling restrained brace can be avoided, meanwhile, the second deformation structure which is adaptive to the first deformation structure is constructed on the steel surface of the corresponding side restrained channel steel, so that the point where the restrained channel steel begins to yield is the same as the point where the fractal core steel plate begins to yield when the fractal core steel plate yields under stress, and the interference phenomenon between the first deformation structure and the second deformation structure is ensured to be difficult to occur.
2. By adopting the all-steel structure, concrete filling is not needed, and compared with the prior art, the invention has the advantages of reducing self weight and construction difficulty and improving construction speed.
3. According to the invention, the fractal core steel plate, the constraint channel steel and the constraint steel plate are connected by adopting an assembly type structure, namely, the high-strength bolt is arranged, so that the damage phenomenon caused by stress concentration problem during welding can be well avoided.
4. According to the invention, the cross transition steel plate is arranged, and the connecting bolt is arranged on the cross transition steel plate, so that the buckling restrained brace can be installed only in a bolt connection mode without adopting a welding process when being installed on a structure needing energy dissipation and shock absorption at the later stage, and the phenomenon of damage caused by stress concentration problem caused by welding can be well avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view taken along line A-A;
FIG. 3 is a schematic structural view of a first modified structure and a second modified structure in the present invention;
FIG. 4 is a load-displacement curve for NBRB.
Reference numerals: 1. a fractal core steel plate; 2. restraining channel steel; 3. a first deformed configuration; 4. a second deformed configuration; 5. a gap; 6. no adhesive material; 7. restraining a steel plate; 8. a high-strength bolt; 9. a cross transition steel plate; 10. a connecting bolt; 11. a layer of compressible material.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings 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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): referring to fig. 1 to 3, the present embodiment provides a buckling restrained brace using a W-M fractal function, including a fractal core steel plate 1, where the top and bottom surfaces of the fractal core steel plate 1 are both provided with a restraining channel steel 2, the restraining channel steel 2 is arranged in a "u" -shaped structure, the restraining channel steel 2 is symmetrically arranged on the top and bottom surfaces of the fractal core steel plate 1, the top and bottom surfaces of the fractal core steel plate 1 are both provided with a first deformation structure 3 in a corrugated structure, the top and bottom surfaces of the fractal core steel plate 1 are curved surfaces in a corrugated shape by setting the first deformation structure 3, and the first deformation structure 3 is calculated by using the W-M fractal function, and the calculation formula is as follows:
wherein, the natural sequence number n is 1, 2, …, 100, the x, y coordinates are all not 0, D is 1.15, the contour space frequency γ is 1.5, and the characteristic scale coefficient G is 1;
the steel surfaces of the two sides of the constraint channel steel 2 close to the fractal core steel plate 1 are provided with second deformation structures 4 matched with the first deformation structures 3 on the corresponding sides, the steel surfaces of the two sides of the constraint channel steel 2 close to the fractal core steel plate 1 are corrugated curved surfaces by arranging the second deformation structures 4, and the second deformation structures 4 are arranged in a manner that the second deformation structures 4 on the two sides of the constraint channel steel 2 are attached to the first deformation structures 3 on the corresponding sides when the two sides of the constraint channel steel 2 are connected to the fractal core steel plate 1;
through the arrangement, the first deformation structure 3 and the second deformation structure 4 are corrugated, namely, strong point weak points are inevitably formed, and weak places are locally weakened relative to the strong points, so that when the buckling restrained brace is stressed to yield, the fractal core steel plate 1 and the two side constraint channel steel 2 can be buckled from the weak points of the edge shape, the end and the connection part of the buckling restrained brace can be prevented from being damaged firstly, and the first deformation structure 3 and the second deformation structure 4 are adaptive to each other, so that the deformation phenomena generated by the fractal core steel plate 1 and the two side constraint channel steel 2 are the same, and the interference phenomenon cannot occur.
Gaps 5 are reserved between steel surfaces of the two sides of the restraint channel steel 2 close to the sides of the fractal core steel plates 1 and side plate surfaces corresponding to the fractal core steel plates 1, the reserved gaps 5 are used for ensuring that the restraint channel steel 2 and the fractal core steel plates 1 have enough deformation spaces when stressed, so that the deformation phenomenon can normally occur, the energy dissipation and shock absorption effects are achieved, the bearing capacity of a support is greatly influenced by the thickness ratio, and according to the bearing capacity-displacement curve of the NBRB in the prior art, the bearing capacity-displacement curve of the NBRB vibrates more obviously along with the increase of the thickness ratio, so that the thickness of the space of the gaps 5 is 7% in the embodiment; all there is no cohesiveness material 6 to fill in the both sides clearance 5, and no cohesiveness material 6 adopts siliceous material, and no cohesiveness material 6's setting is used for preventing fractal core steel sheet 1 and both sides restraint channel-section steel 2 from cohering together to lead to losing of deformation space, and then the inefficacy of the energy dissipation cushioning effect that arouses.
Both sides of fractal core steel sheet 1 all are equipped with restraint steel sheet 7, and both sides restraint steel sheet 7 links together through penetrating high strength bolt 8 with the lateral wall that both sides restraint channel-section steel 2 corresponds the side respectively, and both sides restraint steel sheet 7 cooperation both sides restraint channel-section steel 2 can play the effect of restraint to fractal core steel sheet 1 to this yield strength that improves fractal core steel sheet 1, and then improve the whole bearing capacity that this bucking restraint supported.
Cross transition steel plates 9 are connected to two end portions of the fractal core steel plate 1, in the embodiment, the cross transition steel plates 9 on two sides and the fractal core steel plate 1 are processed by adopting an integrated forming process, so that a welding process is avoided, connecting bolts 10 are screwed on the cross transition steel plates 9, the cross transition steel plates 9 on two sides are used for being installed on an external structure needing energy dissipation and shock absorption, and the cross transition steel plates 9 on two sides are connected through the connecting bolts 10 when being installed with the external structure needing energy dissipation and shock absorption, so that the welding process is avoided; both sides cross transition steel sheet 9 is pressed close to and all is equipped with one deck compressible material layer 11 on the siding wall of fractal core steel sheet 1 side, and setting up of compressible material layer 11 is used for when this bucking restraint brace is installed in external energy dissipation shock-absorbing structure, for the both ends of this bucking restraint brace, and both sides cross transition steel sheet 9 provides the buffer space who avoids expend with heat and contract with cold influence promptly.
In the embodiment, the fractal core steel plate 1, the constraint channel steel 2, the constraint steel plate 7 and the cross transition steel plate 9 are all made of steel materials, so that the fractal core steel plate has enough structural strength, and concrete filling is not needed in the later period; in the actual processing of the first deformation structure 3 and the second deformation structure 4, the fractal core steel plate 1 with the first deformation structure 3 and the constraint channel steel 2 with the second deformation structure 4 can be modeled by finite elements, and then the established model is guided into a processing center for processing.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the present invention as claimed.
Claims (7)
1. The buckling restrained brace adopting the W-M fractal function comprises a fractal core steel plate (1) and is characterized in that: the top bottom surface of fractal core steel sheet (1) all is provided with restraint channel-section steel (2), all is equipped with first deformation structure (3) that are the wave form structure on the top bottom surface of fractal core steel sheet (1), all offers on the steel face that fractal core steel sheet (1) side was pressed close to in both sides restraint channel-section steel (2) with correspond the second deformation structure (4) that the first deformation structure (3) structure of side suited.
2. The buckling-restrained brace adopting the W-M fractal function as claimed in claim 1, wherein: the first deformation structure (3) is obtained by adopting W-M fractal function calculation, and the calculation formula is as follows:
wherein, the natural sequence number n is 1, 2, …, 100, x, y coordinates are not 0, D is 1.15, the contour space frequency γ is 1.5, and the characteristic scale coefficient G is 1.
3. The buckling-restrained brace adopting the W-M fractal function as claimed in claim 1, wherein: restraint channel-section steel (2) are "U" font structure setting, and on restraint channel-section steel (2) were the top bottom surface of symmetry locating fractal core steel sheet (1), both sides restraint channel-section steel (2) were pressed close to the steel face of fractal core steel sheet (1) side and are all reserved gapped (5) between the corresponding side face of fractal core steel sheet (1), and both sides clearance (5) are all filled there is not cohering material (6).
4. The buckling-restrained brace adopting the W-M fractal function as claimed in claim 3, wherein: the thickness of the intermediate wall of the gap (5) is 7 percent.
5. The buckling-restrained brace adopting the W-M fractal function as claimed in claim 3, wherein: both sides of the fractal core steel plate (1) are provided with constraint steel plates (7), and the constraint steel plates (7) on both sides are respectively connected with the side walls of the corresponding sides of the constraint channel steel (2) on both sides through penetrating high-strength bolts (8).
6. The buckling-restrained brace adopting the W-M fractal function as claimed in claim 1, wherein: the two end parts of the fractal core steel plate (1) are respectively connected with a cross transition steel plate (9), and the cross transition steel plates (9) are connected with connecting bolts (10) in a threaded mode.
7. The buckling-restrained brace adopting the W-M fractal function of claim 7, wherein: and the plate walls of the cross transition steel plates (9) on the two sides close to the fractal core steel plate (1) are provided with a layer of compressible material layer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111622326.4A CN114182843B (en) | 2021-12-28 | 2021-12-28 | Buckling restrained brace adopting W-M fractal function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111622326.4A CN114182843B (en) | 2021-12-28 | 2021-12-28 | Buckling restrained brace adopting W-M fractal function |
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| CN114182843A true CN114182843A (en) | 2022-03-15 |
| CN114182843B CN114182843B (en) | 2024-02-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030222188A1 (en) * | 2002-05-29 | 2003-12-04 | Smelser James M. | Bearing brace apparatus |
| CN101545289A (en) * | 2009-04-13 | 2009-09-30 | 清华大学 | All-steel buckling-preventing energy-consuming brace |
| CN105927018A (en) * | 2016-04-21 | 2016-09-07 | 天津大学 | Building structure all-steel buckling-restrained brace in reduced local strength, and manufacturing method thereof |
| CN107989450A (en) * | 2017-12-12 | 2018-05-04 | 华东建筑设计研究院有限公司 | A kind of modularization assembling buckling-restrained bracing member |
| CN112761255A (en) * | 2021-01-12 | 2021-05-07 | 兰州理工大学 | Novel fractal buckling-restrained brace and design method thereof |
-
2021
- 2021-12-28 CN CN202111622326.4A patent/CN114182843B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030222188A1 (en) * | 2002-05-29 | 2003-12-04 | Smelser James M. | Bearing brace apparatus |
| CN101545289A (en) * | 2009-04-13 | 2009-09-30 | 清华大学 | All-steel buckling-preventing energy-consuming brace |
| CN105927018A (en) * | 2016-04-21 | 2016-09-07 | 天津大学 | Building structure all-steel buckling-restrained brace in reduced local strength, and manufacturing method thereof |
| CN107989450A (en) * | 2017-12-12 | 2018-05-04 | 华东建筑设计研究院有限公司 | A kind of modularization assembling buckling-restrained bracing member |
| CN112761255A (en) * | 2021-01-12 | 2021-05-07 | 兰州理工大学 | Novel fractal buckling-restrained brace and design method thereof |
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| CN114182843B (en) | 2024-02-23 |
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