CN107338870B - Function restorable steel frame structure with self-resetting armpit support - Google Patents
Function restorable steel frame structure with self-resetting armpit support Download PDFInfo
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- CN107338870B CN107338870B CN201710750030.8A CN201710750030A CN107338870B CN 107338870 B CN107338870 B CN 107338870B CN 201710750030 A CN201710750030 A CN 201710750030A CN 107338870 B CN107338870 B CN 107338870B
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- self
- steel pipe
- resetting
- core
- cross beam
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Classifications
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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
- E04B1/343—Structures characterised by movable, separable, or collapsible parts, e.g. for transport
- E04B1/344—Structures characterised by movable, separable, or collapsible parts, e.g. for transport with hinged parts
- E04B1/3441—Structures characterised by movable, separable, or collapsible parts, e.g. for transport with hinged parts with articulated bar-shaped elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/024—Structures with steel columns and beams
Abstract
The invention relates to the technical field of earthquake resistance of building structures, and provides a function-recoverable steel frame structure with self-resetting armpit supports, which comprises a cross beam, upright posts and self-resetting buckling-preventing armpit support members; the cross beam is hinged with the upright post to form a steel frame; the self-resetting buckling-restrained armpit supporting members are in a herringbone shape, are connected with the cross beam through first node plates respectively, and are connected with the upright posts on two sides of the cross beam through two second node plates. In the structure of the scheme, the self-resetting buckling restrained brace has the self-resetting function after a major earthquake, so that residual deformation is greatly reduced, and compared with the existing self-resetting buckling restrained brace frame structure, the self-resetting buckling restrained brace has the advantages that the problems that the structure of the traditional self-resetting buckling restrained brace is complex, the deformation requirement cannot be met and the like are avoided by changing the structure and the arrangement form of the self-resetting buckling restrained brace, and the construction and the installation are convenient and quick.
Description
Technical Field
The invention relates to the technical field of building structure earthquake resistance, in particular to a function-recoverable steel frame structure with self-resetting armpit supports.
Background
At present, china is a country with frequent earthquakes, and building of buildings which can be recovered after earthquake is a common wish of students and engineers in the field of engineering earthquake resistance at home and abroad. The buckling restrained brace is a high-efficiency stable metal energy dissipation damper, not only can provide lateral rigidity for the structure in small earthquake, but also can consume earthquake energy through a metal pulling-buckling mechanism in medium and large earthquake. In general, the buckling restrained brace 1 may be arranged in a monoclinic (as shown in FIG. 1), chevron (as shown in FIG. 2) or V-shaped (as shown in FIG. 3) arrangement. Because the buckling restrained brace has entered plasticity under the medium and large earthquake, the whole structure has larger residual deformation and is difficult to repair, in addition, even if the main body structure provided with the buckling restrained brace is still difficult to avoid damage and damage (such as the plastic hinge position of the beam end) under the large earthquake, the main body structure is still difficult to reset by oneself even if the buckling restrained brace is dismantled, a large amount of manpower and material resources are still required to repair the main body structure after the earthquake, and the post-earthquake use of the building is affected.
Disclosure of Invention
The invention aims to provide a functional restorable steel frame structure with a self-resetting armpit support, which solves the technical problems that the main body frame structure in the prior art is difficult to repair due to residual deformation under medium and large earthquake, and a great deal of manpower and material resources are required to repair the main body structure.
In order to achieve the above object, the present invention provides the following technical solutions;
the invention provides a function restorable steel frame structure with a self-resetting armpit support, which comprises a cross beam, an upright post and a self-resetting buckling-preventing armpit support member;
the cross beam is hinged with the upright post to form a steel frame;
the self-resetting buckling-restrained armpit supporting members are in a herringbone shape, are connected with the cross beam through first node plates respectively, and are connected with the upright posts on two sides of the cross beam through two second node plates.
In the above technical solution, further, the self-resetting buckling-restrained brace member includes at least one core steel pipe, at least one constraint steel pipe, at least two limit bolts, at least one high-strength screw and at least two end plates;
the constraint steel pipe is sleeved on the outer side of the core steel pipe, the constraint steel pipe and the core steel pipe are fixedly connected through two limiting bolts, two end plates are respectively arranged at two ends of the core steel pipe, the high-strength screw rod penetrates through the core steel pipe and the end plate at the other side in sequence from one end plate of the core steel pipe to be locked and fixed through nuts, and pretightening force is applied to the high-strength screw rod, so that the end plates at two sides of the core steel pipe are used for prepressing the core steel pipe.
In any of the above technical solutions, further, the self-resetting buckling-preventing axillary support member further includes at least two limiting steel pipes, wherein the limiting steel pipes are respectively sleeved at two ends of the core steel pipe and welded with the end plates.
In any of the above technical solutions, further, the limiting steel pipe and the constraint steel pipe have the same diameter.
In any one of the above technical solutions, further, a welded steel pipe is connected to a side, far away from the constraint steel pipe, of the end plate, and each of the connected steel pipes is welded to the first gusset plate and the second gusset plate respectively.
In any of the above technical solutions, further, a long slot hole is formed at a free end of the connecting steel pipe, and the long slot hole can be respectively assembled with the first node plate and the second node plate in an inserting way.
In any one of the above technical solutions, further, each of the connecting steel pipes is welded to the first gusset plate and the second gusset plate, respectively.
In any of the above technical solutions, further, a backing plate is disposed between the end plate and the nut.
In any of the above technical solutions, further, the core steel pipe, the constraint steel pipe, the limit steel pipe and the connecting steel pipe are one of round pipes or square pipes made of high-strength materials.
In any of the above technical solutions, further, the shape of the end plate is circular or rectangular, and the diameter of the end plate is larger than the diameter of the limiting steel pipe.
By adopting the technical scheme, the invention has the following beneficial effects:
the beam and the upright posts are connected in a hinged mode to form the steel frame, the self-resetting buckling-restrained armpit supporting members are in a herringbone shape and are respectively connected with the cross beam through the first node plates and the upright posts on two sides of the cross beam through the two second node plates, and through the arrangement, the deformation requirement of the self-resetting support under an earthquake can be reduced, the self-resetting function is achieved in the structure and after the earthquake, and residual deformation (zero in theory) is greatly reduced; compared with the existing self-resetting buckling restrained brace frame structure, the structure and the arrangement form of the self-resetting buckling restrained brace are changed, so that the problems that the structure of the traditional self-resetting buckling restrained brace is complex, the deformation requirement cannot be met and the like are avoided, and the construction and the installation are convenient and quick.
In addition, the advantages of the present invention are particularly exhibited by:
1. the restoring capability is provided by a force self-balancing mode between the pre-tensioning force of the high-strength screw and the pre-tensioning force of the high-strength core steel pipe, so that the structure is simpler, and the factory construction is facilitated;
2. the compression core steel tube in the self-resetting buckling-restrained armpit support is made of high-strength steel, the strength of the compression core steel tube is equivalent to that of a high-strength screw rod, and the similar self-resetting deformation capacity can be realized in the pulling and pressing directions;
3. the bracing arrangement form of the traditional self-resetting buckling-restrained brace is changed into the axillary bracing arrangement form in the beam column node area, so that the axial deformation requirement of the brace generated by the earthquake deformation of the main body structure can be reduced, the self-resetting capability of the main body structure is improved, the problem of loss of the self-resetting capability caused by the loss of pretension is avoided, and the adverse influence of the traditional bracing arrangement on the building elevation and visual permeability is also avoided;
4. the beam-column joint adopts a hinged mode, so that the plastic damage of the beam end caused by the beam-column bending moment in an earthquake can be avoided, and the elastic rotation rigidity is provided for the beam-column joint through the self-resetting armpit support;
5. the longitudinal slot holes are formed in the connecting steel pipes, so that the self-resetting buckling restrained brace is convenient to be inserted and welded with the node plate on site, and construction is convenient;
6. the main body structure and the self-resetting buckling-preventing axillary support members in the earthquake always keep elasticity, so that the self-recovery of the functions of the building after the earthquake can be realized, the post-earthquake repair is not needed, and the economy is very outstanding.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art buckling restrained frame in a monoclinic arrangement;
FIG. 2 is a schematic view of a prior art inverted V-shaped buckling restrained brace frame;
FIG. 3 is a schematic view of a prior art buckling restrained brace frame in a V-shaped arrangement;
FIG. 4 is a schematic structural view of a functional restorable steel frame structure with self-resetting armpits provided by the invention;
FIG. 5 is a schematic view of a self-healing buckling restrained brace member with a self-healing axillary brace of the present invention;
FIG. 6 is a schematic cross-sectional view of the structure of FIG. 5 in the direction A-A;
FIG. 7 is a schematic cross-sectional view of the structure in the direction B-B in FIG. 5;
FIG. 8 is a schematic cross-sectional view of the structure of FIG. 5 in the direction C-C;
FIG. 9 is a schematic cross-sectional view of the structure of FIG. 5 in the direction D-D;
FIG. 10 is a schematic cross-sectional view of the E-E of FIG. 5;
FIG. 11 is a schematic cross-sectional view of the F-F direction of FIG. 5;
FIG. 12 is a schematic view of another view of a self-healing buckling restrained brace member with a self-healing axillary brace of the present invention;
FIG. 13 is a schematic illustration of an assembly flow of a self-righting buckling-restrained brace member with a self-righting armpit brace function provided by the invention;
FIG. 14 is a schematic diagram of a second assembly process of a self-resetting buckling-restrained brace member with a self-resetting armpit brace function provided by the invention;
FIG. 15 is a schematic diagram of an assembly flow chart of a self-resetting buckling-restrained brace member with a self-resetting armpit brace function provided by the invention;
fig. 16 is a schematic view of a functional restorable steel frame structure with self-restoring armpits according to an embodiment of the present invention.
Reference numerals:
1-a buckling restrained brace; 2-self-resetting buckling-restrained axillary support members; 21-core steel pipe; 22-restraining the steel pipe; 23-limiting bolts; 24-high-strength screw rods; 25-end plates; 26-limiting steel pipes; 27-connecting steel pipes; 271-long slot; 28-backing plate; 3-a cross beam; 4-stand columns; 5-a first node board; 6-a second gusset.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention is further illustrated with reference to specific embodiments.
Example 1
As shown in fig. 4-16, the functional restorable steel frame structure with the self-restoring axillary support provided by the embodiment comprises a cross beam 3, an upright post 4 and a self-restoring buckling-preventing axillary support member 2;
the cross beam 3 is hinged with the upright post 4 to form a steel frame;
the self-resetting buckling-preventing armpit supporting members 2 are in a herringbone shape, are connected with the cross beam 3 through first node plates 5 respectively, and are connected with the upright posts 4 on two sides of the cross beam 3 through two second node plates 6.
In an alternative implementation based on the above embodiment, as shown in fig. 5-16, the self-resetting buckling restrained axillary support member 2 comprises at least one core steel tube 21, at least one restraining steel tube 22, at least two limit bolts 23, at least one high-strength screw 24 and at least two end plates 25;
the constraint steel pipe 22 is sleeved on the outer side of the core steel pipe 21 and penetrates through the constraint steel pipe 22 and the core steel pipe 21 through two limiting bolts 23 respectively, two end plates 25 are arranged at two ends of the core steel pipe 21 respectively, the high-strength screw 24 penetrates through the core steel pipe 21 and the end plates 25 at the other side in sequence from one end plate 25 of the core steel pipe 21 to be locked and fixed through nuts, and pretightening force is applied to the high-strength screw 24, so that the end plates 25 at two sides of the core steel pipe 21 are preloaded against the core steel pipe 21.
As shown in fig. 12, the self-resetting buckling-preventing axillary support member 2 further includes at least two limiting steel pipes 26, wherein the limiting steel pipes 26 are respectively sleeved at two ends of the core steel pipe 21 and welded with the end plate 25, and the diameters of the limiting steel pipes 26 are the same as those of the constraint steel pipes 22. The self-balancing mode of the force between the pretension of the high-strength screw 24 and the precompression of the high-strength core steel pipe 21 provides resetting capability, the structure is simpler, the factory construction is facilitated, the pressed core steel pipe 21 in the self-resetting buckling-preventing axillary support member 2 is made of high-strength steel, the strength of the self-resetting buckling-preventing axillary support member is equivalent to that of the high-strength screw 24, and similar self-resetting deformation capability can be realized in the pulling and pressing directions.
On the basis of the above embodiment, a connecting steel pipe 27 is welded to the end plate 25 at a side away from the constraint steel pipe 22, and each connecting steel pipe 27 is welded to the first gusset plate 5 and the second gusset plate 6, respectively.
Specifically, as shown in fig. 12, the free end of the connecting steel pipe 27 is provided with a long groove hole 271, and the long groove hole 271 can be respectively inserted and combined with the first node board 5 and the second node board 6. The longitudinal groove hole 271 is formed in the connecting steel pipe 27, so that the self-resetting buckling restrained brace is convenient to insert and connect with a welding seam on site of the gusset plate, and construction is convenient.
More specifically, each of the connecting steel pipes 27 is welded to the first and second gusset plates 5 and 6, respectively. The bracing arrangement form of the traditional self-resetting buckling-restrained brace is changed into the axillary bracing arrangement form in the beam column node area, so that the axial deformation requirement of the brace generated by the earthquake deformation of the main body structure can be reduced, the self-resetting capability of the main body structure is improved, the problem of loss of the self-resetting capability caused by the loss of pretension is avoided, and the adverse influence of the traditional bracing arrangement on the building elevation and visual permeability is also avoided;
in an alternative implementation based on the above described embodiment, as shown in fig. 12-15, a spacer 28 is provided between the end plate 25 and the nut.
The setting of the backing plate 28 prevents the looseness between the nut and the high-strength screw 24, and improves the reliability of the product.
In an alternative implementation manner based on the above embodiment, the core steel pipe 21, the constraint steel pipe 22, the limit steel pipe 26 and the connection steel pipe 27 are one of round pipes or square pipes made of high-strength materials.
The shape of the end plate 25 is circular or rectangular, and the diameter of the end plate 25 is larger than that of the limit steel pipe 26.
It should be noted that the steel pipe may be in a regular polygon or other shapes, which are all within the scope of the present invention for those skilled in the art.
Specifically, the traditional technical means is that a prestress steel strand is arranged on the buckling restrained brace to form a self-resetting device, and then a self-resetting buckling restrained brace component is formed. However, the previous researches show that under a large earthquake, the interlayer displacement of the self-resetting buckling restrained brace structure can reach 2%, and the deformation requirement even exceeds the elastic deformation capacity of the steel stranded wires so that the steel stranded wires enter yield, thereby losing the elastic resetting effect on the buckling restrained brace and the main body structure. In addition, the existing self-resetting buckling restrained brace is extremely complex in structure, high in machining precision requirement, high in manufacturing cost and difficult to apply in practical engineering. Meanwhile, for the self-resetting buckling restrained brace structure adopting the traditional rigid connection, the plastic hinge position of the girder end of the heavy earthquake is inevitably damaged, so that the main structure belongs to an earthquake damage structure, the next heavy earthquake possibly suffered by the heavy earthquake is difficult to resist, and therefore, the local repair of the beam-column node after resetting is still needed, in summary, the building structure anti-seismic structure system with the self-resetting function is still difficult to realize by the prior art means, the self-resetting steel frame structure with the self-resetting armpit support is provided, the girder is hinged with the upright posts 4 to form a steel frame, the girder-column node adopts a hinged form, the girder end plastic damage caused by the girder bending moment in the earthquake can be avoided, the girder-column node is provided with elastic rotation rigidity through the self-resetting armpit support, the self-resetting buckling restrained brace structure 2 is in a herringbone shape, and is respectively connected with the cross beam 3 through the first node plate 5, and is connected with the upright posts 4 on two sides of the cross beam 3 through the two second node plates 6, and the structure still has the self-resetting function after the heavy earthquake is suffered, and residual deformation is greatly reduced (zero in theory); compared with the existing self-resetting buckling restrained brace frame structure, the structure and the arrangement form of the self-resetting buckling restrained brace are changed, so that the problems that the structure of the traditional self-resetting buckling restrained brace is complex, the deformation requirement cannot be met and the like are avoided, and the construction and the installation are convenient and quick.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention 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.
Claims (5)
1. The functional restorable steel frame structure with the self-resetting armpit support is characterized by comprising a cross beam, an upright post and a self-resetting buckling-preventing armpit support member;
the cross beam is hinged with the upright post to form a steel frame;
the self-resetting buckling-preventing armpit supporting members are in a herringbone shape, are connected with the cross beam through first node plates respectively, and are connected with the upright posts on two sides of the cross beam through two second node plates;
the self-resetting buckling-preventing axillary support component comprises at least one core steel pipe, at least one constraint steel pipe, at least two limit bolts, at least one high-strength screw rod and at least two end plates;
the constraint steel pipe is sleeved on the outer side of the core steel pipe and fixedly connected with the core steel pipe through two limiting bolts respectively, two end plates are respectively arranged at two ends of the core steel pipe, the high-strength screw rod sequentially penetrates through the core steel pipe and the end plate at the other side from the end plate at one side of the core steel pipe and is locked and fixed through nuts, and pretightening force is applied to the high-strength screw rod, so that the end plates at two sides of the core steel pipe generate a pretightening effect on the core steel pipe;
the two ends of the core steel pipe are sleeved with the limiting steel pipes respectively, and the limiting steel pipes are welded with the end plates;
a connecting steel pipe is welded on one side, far away from the core steel pipe, of the end plate, and each connecting steel pipe is welded with the first node plate and the second node plate respectively;
the core steel pipe, the constraint steel pipe, the limit steel pipe and the connecting steel pipe are one of round pipes or square pipes made of high-strength materials.
2. The functionally restorable steel frame structure with self-restoring axillary support according to claim 1, characterized in that,
the diameter of the limiting steel pipe is the same as that of the constraint steel pipe.
3. The functionally restorable steel frame structure with self-restoring axillary support according to claim 1, characterized in that,
the free end of the connecting steel pipe is provided with a long slot hole, and the long slot hole can be respectively inserted and assembled with the first node plate and the second node plate.
4. The functionally restorable steel frame structure with self-restoring axillary support according to claim 1, characterized in that,
a backing plate is arranged between the end plate and the nut.
5. The functionally restorable steel frame structure with self-restoring axillary support according to claim 1, characterized in that,
the shape of the end plate is round or rectangular, and the diameter of the end plate is larger than that of the limit steel pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710750030.8A CN107338870B (en) | 2017-08-28 | 2017-08-28 | Function restorable steel frame structure with self-resetting armpit support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710750030.8A CN107338870B (en) | 2017-08-28 | 2017-08-28 | Function restorable steel frame structure with self-resetting armpit support |
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| CN107338870A CN107338870A (en) | 2017-11-10 |
| CN107338870B true CN107338870B (en) | 2023-08-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108560708A (en) * | 2018-04-25 | 2018-09-21 | 中建钢构有限公司 | A kind of steel frame supporting structure |
| CN109267762A (en) * | 2018-10-12 | 2019-01-25 | 天津城建大学 | Ruggedized construction and its construction method suitable for the existing building wall containing constructional column |
| CN109629895A (en) * | 2018-11-29 | 2019-04-16 | 北京建筑大学 | A kind of bearing diagonal replaces the system of center pillar raising frame-type underground structure anti-seismic performance |
| CN109972891B (en) * | 2019-03-08 | 2021-05-25 | 福建鑫晟钢业有限公司 | Prefabricated steel structure-based fabricated steel plate net concrete-encased shear wall structure |
| CN110359590B (en) * | 2019-07-05 | 2024-02-23 | 重庆大学 | Dual buckling-restrained connector for lateral connection of primary and secondary structures |
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| CN107338870A (en) | 2017-11-10 |
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