CN216973812U - Take limit function's two yield point rod iron bucking restraint to support - Google Patents

Take limit function's two yield point rod iron bucking restraint to support Download PDF

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CN216973812U
CN216973812U CN202121177799.3U CN202121177799U CN216973812U CN 216973812 U CN216973812 U CN 216973812U CN 202121177799 U CN202121177799 U CN 202121177799U CN 216973812 U CN216973812 U CN 216973812U
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steel pipe
energy
limiting
steel bar
steel
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甄伟
閤东东
程俊飞
张磊
张龑华
赵帆
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Beijing Institute of Architectural Design Group Co Ltd
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Beijing Institute of Architectural Design Group Co Ltd
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Abstract

The utility model relates to the technical field of building anti-seismic structures, in particular to a double-yield-point steel bar buckling restrained brace with a limiting function. The utility model includes: the energy-saving steel comprises a first-stage energy-consuming soft steel bar, a second-stage energy-consuming soft steel pipe, a constraint steel pipe, a limiting steel plate and a connecting steel bar; the primary energy-consuming mild steel bar is welded with the connecting steel bar; the limiting steel plate is welded with the first-stage energy dissipation mild steel bar; the secondary energy dissipation soft steel pipe is sleeved on the primary energy dissipation soft steel bar; the restraint steel pipe is sleeved on the secondary energy consumption soft steel pipe. The device adopts a double-yield-point design and introduces primary energy-consuming mild steelThe rod and the secondary energy consumption soft steel pipe device are controlled by controlling the starting threshold delta of the secondary energy consumption soft steel pipe1And constraint steel pipe start threshold delta2The problem was successfully solved. Meanwhile, on the premise of not greatly increasing the structural cost, the application range of the buckling-restrained energy-dissipation brace is expanded.

Description

Take limit function's two yield point rod iron bucking restraint to support
Technical Field
The utility model relates to the technical field of building anti-seismic structures, in particular to a double-yield-point steel bar buckling restrained brace with a limiting function.
Background
The buckling restrained brace is an energy dissipation and shock absorption device with excellent performance and mainly comprises 3 parts, namely a core energy dissipation section, an outer wrapping restraining unit and an unbonded sliding mechanism unit. The energy dissipation section of the buckling restrained brace is generally made of steel with a low yield point, the restraining unit can be made of concrete filled steel tubes, reinforced concrete jackets, circular or polygonal steel tubes and the like, and unbonded materials provide a sliding interface between the energy dissipation unit and the restraining unit, so that the increase of axial force caused by friction between the energy dissipation unit and the restraining unit after the energy dissipation unit is pressed and expanded is avoided. When the core energy consumption section bears axial pressure, the outsourcing constraint unit is utilized to constrain the transverse deformation of the core energy consumption section, so that the core energy consumption section is prevented from buckling, the core energy consumption section can generate full-section yielding under the action of axial force, and symmetrical stress performance is obtained in the stretching and compressing directions. The buckling restrained brace has the characteristics of clear damping mechanism, obvious damping effect, safety, reliability, economy and reasonability, and can meet the anti-seismic requirements of different structures. Under the normal use state and the action of small earthquake, the buckling restrained brace provides lateral stiffness for the building structure, and plays a role of common bracing; under the action of a large earthquake, the buckling restrained brace can dissipate the energy input by the earthquake through repeated pulling and pressing hysteresis. Most of the existing buckling restrained braces only have one yield point, do not yield under the action of small earthquake, only provide additional rigidity and do not participate in energy consumption. When the structure is under the action of a medium shock, the support provides necessary lateral stiffness and energy consumption for the structure; when the structure is subjected to an earthquake exceeding the estimated earthquake, the buckling restrained brace is subjected to energy consumption damage, the brace is withdrawn from working, the lateral stiffness of the structure is weakened instantaneously, and the structure is easy to collapse and damage.
In recent years, some researchers begin to develop a staged yielding buckling restrained brace, one part of the yielding restrained brace firstly yields and consumes energy under a small earthquake, and most of the yielding restrained brace yields and consumes energy under a medium earthquake or a large earthquake, so that the energy consumption capability of the yielding restrained brace for resisting earthquakes with different strengths is effectively improved. The existing implementation method of the staged energy consumption buckling restrained brace comprises the combination of dampers with different energy consumption mechanisms and the combination of dampers with different energy consumption materials. The existing device mostly adopts a mode that energy consumption sections with low yield points and energy consumption sections with high yield points are directly connected in parallel, and because the rigidity of the energy consumption section with high yield points is much higher than that of the energy consumption section with low yield points, the energy consumption of the energy consumption section with low yield points is greatly influenced, and the staged yield cannot be well realized.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a double-yield-point steel bar buckling restrained brace with a limiting function, and aims to solve the technical problems in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a double-yield-point steel bar buckling restrained brace with a limiting function, which comprises: the energy-consumption steel bar comprises a first-stage energy-consumption soft steel bar, a second-stage energy-consumption soft steel pipe, a constraint steel pipe, a limiting steel plate and a connecting steel bar; the first-stage energy-consumption mild steel bar is welded with the connecting steel bar; the limiting steel plate is welded with the first-stage energy-consumption mild steel bar; the secondary energy consumption soft steel pipe is sleeved on the primary energy consumption soft steel bar; the second-stage energy consumption soft steel pipe is provided with a limiting groove corresponding to the limiting steel plate, and the gap between the limiting groove of the second-stage energy consumption soft steel pipe and the limiting steel plate is the starting threshold delta of the second-stage energy consumption soft steel pipe1(ii) a The constraint steel pipe is sleeved on the secondary energy consumption soft steel pipe, and the constraint steel pipe is provided with a steel pipeThe spacing grooves corresponding to the spacing steel plates, and the clearance between the spacing grooves of the restraint steel pipes and the spacing steel plates is a restraint steel pipe starting threshold value delta2(ii) a Constraint steel pipe starting threshold delta2Greater than the secondary energy consumption soft steel pipe starting threshold delta1
Preferably, the diameters of the two ends of the primary energy consumption mild steel bar are larger than the diameter of the middle section.
Preferably, the limiting steel plates are respectively welded at two ends of the first-stage energy-consumption mild steel bar; the limiting steel plate is arranged in a protruding mode on the upper surface and the lower surface of the first-stage energy dissipation mild steel bar in the radial direction.
Preferably, the end part of the secondary energy consumption soft steel pipe is provided with two limiting grooves which are opposite up and down.
Preferably, the end of the constraint steel pipe is provided with two limiting grooves which are opposite up and down.
Preferably, an unbonded sliding material layer is arranged between the primary energy consumption soft steel bar and the secondary energy consumption soft steel pipe.
By adopting the technical scheme, the utility model has the following beneficial effects:
the utility model aims at the difficult problems that the traditional buckling-restrained energy-dissipation brace generally has only one yield point, does not yield under the action of small earthquake, only provides additional rigidity and does not participate in energy dissipation. The device adopts a double-yield-point design, introduces a first-stage energy-consumption mild steel bar and a second-stage energy-consumption mild steel pipe device, and controls a starting threshold delta of the second-stage energy-consumption mild steel pipe1And constraint steel pipe start threshold delta2The problem was successfully solved. Meanwhile, on the premise of not greatly increasing the structural cost, the application range of the buckling-restrained energy-dissipation brace is expanded.
The utility model aims at the problems that the existing anti-buckling energy dissipation brace mainly depends on the core unit to perform structural earthquake resistance and energy dissipation, when the structure is subjected to the earthquake exceeding the estimated earthquake, the core unit is damaged by energy dissipation, the brace completely quits the work, the lateral stiffness of the building is instantly suddenly reduced, and the building is extremely easy to collapse and damage. The device introduces the limiting steel plate, and when the supporting energy consumption mild steel reaches the starting threshold delta of the restraint steel pipe2After that, the deviceNecessary lateral stiffness is continuously provided for the structure through the constraint steel pipe, and the structure is prevented from being seriously damaged under the action of exceeding the estimated large earthquake.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is an explosion schematic diagram of a double-yield-point steel bar buckling-restrained brace with a limiting function, provided by an embodiment of the utility model;
FIG. 2 is a schematic structural view of the primary energy dissipating mild steel bar shown in FIG. 1;
FIG. 3 is a schematic structural view of the secondary energy dissipating mild steel bar shown in FIG. 1;
FIG. 4 is a schematic structural diagram of a restraining steel pipe according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a double-yield-point steel bar buckling-restrained brace with a limiting function according to an embodiment of the present invention;
an icon: 1-first-level energy-consumption mild steel bar; 2-two-stage energy consumption soft steel pipe; 3-restraining the steel pipe; 4-limiting a steel plate; 5-connecting the steel bar.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The embodiment provides a two yield point rod iron bucking restraint of taking limit function and supports, include: the energy-consumption restraining device comprises a first-stage energy-consumption soft steel bar 1, a second-stage energy-consumption soft steel pipe 2, a restraining steel pipe 3, a limiting steel plate 4 and a connecting steel bar 5; the first-stage energy-consumption mild steel bar 1 is welded with the connecting steel bar 5; the limiting steel plate 4 is welded with the first-stage energy-consumption mild steel bar 1; the secondary energy consumption mild steel pipe 2 is sleeved on the primary energy consumption mild steel bar 1; the second-stage energy consumption mild steel pipe 2 is provided with a limiting groove corresponding to the limiting steel plate 4, and the gap between the limiting groove of the second-stage energy consumption mild steel pipe 2 and the limiting steel plate 4 is the starting threshold value delta of the second-stage energy consumption mild steel pipe1(ii) a The restraint steel pipe 3 is sleeved on the secondary energy consumption soft steel pipe 2, the restraint steel pipe 3 is provided with a limit groove corresponding to the limit steel plate 4, and the limit groove of the restraint steel pipe 3 is connected with the limit steel plate 4The interval is a start threshold delta of a constraint steel pipe2(ii) a Constraint steel pipe start threshold delta2Greater than the secondary energy consumption soft steel pipe starting threshold delta1
Preferably, the diameters of the two ends of the first-stage energy-consuming mild steel bar 1 are larger than the diameter of the middle section.
Preferably, the limiting steel plates 4 are respectively welded at two ends of the first-stage energy-consumption mild steel bar 1; the limiting steel plate 4 is arranged on the upper surface and the lower surface of the first-level energy-consumption mild steel bar 1 in a protruding mode in the radial direction.
Preferably, two limiting grooves which are opposite up and down are arranged at the end part of the secondary energy consumption soft steel pipe 2.
Preferably, the restraining steel pipe 3 is provided with two vertically opposite limiting grooves at the end.
Preferably, an unbonded sliding material layer is arranged between the primary energy consumption mild steel bar 1 and the secondary energy consumption mild steel pipe 2.
The working mechanism of this example is as follows:
1) by selecting different materials and core segment lengths, the ultimate deformation of the primary energy consumption mild steel bar is controlled to achieve the ultimate deformation under the action of a large earthquake; by designing a secondary energy consumption soft steel pipe starting threshold delta1Adjusting the time when the secondary energy consumption soft steel pipe enters a working state, and restricting the starting threshold delta of the steel pipe by design2To adjust when the restraining steel pipe enters the working state. Under general conditions, the secondary energy consumption soft steel pipe starting threshold value delta can be estimated according to the deformation between structural layers during the earthquake1Estimating and restraining the starting threshold delta of the steel pipe according to the deformation between the structural layers under the major earthquake or the extreme earthquake2
2) Under the action of small earthquake, the buckling energy dissipation effect is achieved when the first-stage energy dissipation mild steel bar 1 is in a buckling energy dissipation state due to the fact that the yield force is small in the first yielding stage, and the first-stage energy dissipation mild steel bar enters a working state to play the role of energy dissipation and shock absorption, and the buckling restrained brace deformation value of the device in the first yielding stage is smaller than delta1(ii) a The second-stage energy-consumption mild steel pipe 2 does not enter a working state at the present stage, and provides lateral restraint for the first-stage energy-consumption mild steel bar 1 together with the restraint steel pipe 3, so that the first-stage energy-consumption mild steel bar 1 is prevented from being out-of-plane unstable. Mainly applied to solving the problem of traditional buckling-restrained energy-dissipation brace, and only has the buckling-restrained energy-dissipation brace under the general conditionOne yielding section does not yield under the action of small shock, only provides additional rigidity and does not participate in the energy consumption.
3) Under the action of medium shock, the deformation value of the buckling restrained brace is greater than delta1Is smaller than delta2At the moment, the second-stage energy consumption soft steel pipe 2 also enters a working state and consumes energy together with the first-stage energy consumption soft steel bar 1, and the restraint steel pipe 3 at the current stage provides lateral restraint for the second-stage energy consumption soft steel pipe 2 to prevent the second-stage energy consumption soft steel pipe 2 from generating out-of-plane instability. At present, the energy dissipation and shock absorption device is mainly applied to providing energy dissipation and shock absorption guarantee for the structure when the structure encounters the medium shock effect.
4) Under the working condition of large earthquake or great earthquake, the buckling restrained brace has the deformation value larger than delta2And at the moment, the deformation between the structural layers is large, the structure is in a state of being damaged by collapse, the constraint steel pipe 3 provides necessary lateral stiffness for the structure, and the situation that the lateral stiffness of the building is suddenly reduced instantly due to the fact that the damper is withdrawn from working under the action of estimated major earthquake is avoided.
In summary, the present embodiment has the following beneficial effects:
the utility model aims at the difficult problems that the traditional buckling-restrained energy-dissipation brace generally has only one yield point, does not yield under the action of small earthquake, only provides additional rigidity and does not participate in energy dissipation. The device adopts a double-yield-point design, introduces a first-stage energy-consumption mild steel bar and a second-stage energy-consumption mild steel pipe device, and controls a starting threshold delta of the second-stage energy-consumption mild steel pipe1And constraint steel pipe start threshold delta2The problem was successfully solved. Meanwhile, on the premise of not greatly increasing the structural cost, the application range of the buckling-restrained energy-dissipation brace is expanded.
The utility model aims at the problems that the existing anti-buckling energy dissipation brace mainly depends on the core unit to perform structural earthquake resistance and energy dissipation, when the structure is subjected to the earthquake exceeding the estimated earthquake, the core unit is damaged by energy dissipation, the brace completely quits the work, the lateral stiffness of the building is instantly suddenly reduced, and the building is extremely easy to collapse and damage. The device introduces the limiting steel plate, and when the supporting energy consumption mild steel reaches the deformation value delta2Afterwards, the device continues to provide necessary lateral stiffness for the structure through the constraint steel pipe, and the structure is prevented from exceeding the estimated major earthquakeSevere damage occurs.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. The utility model provides a take limit function's two yield point rod iron bucking restraint to support which characterized in that includes: the energy-saving steel comprises a first-stage energy-consuming soft steel bar, a second-stage energy-consuming soft steel pipe, a constraint steel pipe, a limiting steel plate and a connecting steel bar; the first-stage energy-consumption mild steel bar is welded with the connecting steel bar; the limiting steel plate is welded with the first-stage energy-consumption mild steel bar; the secondary energy dissipation soft steel pipe is sleeved on the primary energy dissipation soft steel bar; the second-stage energy consumption soft steel pipe is provided with a limiting groove corresponding to the limiting steel plate, and the gap between the limiting groove of the second-stage energy consumption soft steel pipe and the limiting steel plate is the starting threshold delta of the second-stage energy consumption soft steel pipe1(ii) a The restraint steel pipe is sleeved on the secondary energy consumption soft steel pipe and provided with a limiting groove corresponding to the limiting steel plate, and the gap between the limiting groove of the restraint steel pipe and the limiting steel plate is a restraint steel pipe starting threshold delta2(ii) a Constraint steel pipe starting threshold delta2Is greater than the starting threshold delta of the two-stage energy consumption soft steel pipe1
2. The double-yield-point steel bar buckling restrained brace with the limiting function is characterized in that the diameters of the two ends of the primary energy dissipation mild steel bar are larger than the diameter of the middle section.
3. The double-yield-point steel bar buckling-restrained brace with the limiting function as claimed in claim 1, wherein the limiting steel plates are respectively welded at two ends of the primary energy-consuming soft steel bar; the limiting steel plate is arranged on the upper surface and the lower surface of the first-level energy-consumption mild steel bar in a protruding mode along the radial direction of the first-level energy-consumption mild steel bar.
4. The double-yield-point steel bar buckling restrained brace with the limiting function according to claim 1, wherein the end portion of the secondary energy dissipation soft steel pipe is provided with two limiting grooves which are opposite up and down.
5. The double-yield-point steel bar buckling restrained brace with the limiting function according to claim 1, wherein the restraining steel pipe is provided with two limiting grooves which are opposite up and down at the end part.
6. The double-yield-point steel bar buckling restrained brace with the limiting function is characterized in that an unbonded sliding material layer is arranged between the primary energy dissipation mild steel bar and the secondary energy dissipation mild steel pipe.
CN202121177799.3U 2021-05-28 2021-05-28 Take limit function's two yield point rod iron bucking restraint to support Active CN216973812U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115977245A (en) * 2023-03-21 2023-04-18 湖南大学 High-energy-consumption high-bearing-capacity self-resetting beam column node

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115977245A (en) * 2023-03-21 2023-04-18 湖南大学 High-energy-consumption high-bearing-capacity self-resetting beam column node
CN115977245B (en) * 2023-03-21 2023-05-12 湖南大学 High-energy-consumption high-bearing-capacity self-resetting beam column node

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