CN113026943A - Fabricated beam-column joint structure with buckling constraint device and installation method thereof - Google Patents
Fabricated beam-column joint structure with buckling constraint device and installation method thereof Download PDFInfo
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- CN113026943A CN113026943A CN202110150515.XA CN202110150515A CN113026943A CN 113026943 A CN113026943 A CN 113026943A CN 202110150515 A CN202110150515 A CN 202110150515A CN 113026943 A CN113026943 A CN 113026943A
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
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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
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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
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention belongs to the technical field of assembly type buildings, and relates to an assembly type building node transformation technology, in particular to an assembly type beam-column node structure with a buckling constraint device and an installation method thereof. The overall safety performance of the structure is improved, and the main parts of the structure can achieve the purpose of energy consumption when the structure encounters a rare earthquake.
Description
Technical Field
The invention belongs to the technical field of fabricated buildings, relates to a fabricated building node transformation technology, and particularly relates to a fabricated beam-column node structure with a buckling constraint device and an installation method thereof.
Background
The assembled steel structure is one of important trends and important directions of the building structure development in China, has the advantages of high efficiency, energy conservation, convenience in installation, environmental friendliness and the like, and follows the sustainable development principle. The steel structure beam column node with the cantilever beam section is widely applied in engineering practice, the traditional node form is mainly full welding and bolt welding, most of the damage forms are brittle failure in a node area and ductile failure of beam section plastic hinges, and great difficulty is caused to post-earthquake reinforcement and post-earthquake repair of the structure. In the earthquakes occurring in the united states and japan in the last ninety decades, much plastic failure occurred in the welds of steel structures, and high economic costs were incurred to repair these structures after earthquake. Therefore, the research and development of the replaceable energy dissipation part steel structure system which is convenient to install and can be quickly repaired after an earthquake becomes a hotspot of research in recent years.
At present, the replaceable energy dissipation part of the steel structure beam column joint is researched in a form of a low-yield-point steel cover plate, the low-yield-point steel has good ductility and energy dissipation capacity, when an earthquake occurs, the low-yield-point cover plate energy dissipation part dissipates earthquake energy through obvious plastic deformation, so that the purpose of protecting main components is achieved, the main components are slightly damaged or even not damaged, the plastic deformation of the main components such as the beam and the column is avoided, and the overall performance of the structure can be recovered only by replacing the energy dissipation part after the earthquake.
According to the requirement of seismic design specifications, for a steel frame beam-column node, when the node is influenced by a fortification earthquake which is equivalent to the seismic fortification intensity of a local region, the node can consume earthquake energy by an energy consumption piece of the structure, and when the node is influenced by a rare earthquake, a main body component of the structure can also consume a part of energy so as to ensure that the whole safety of the structure is not collapsed or seriously damaged, which threatens life. With the continuous development of society, the safety of building structures becomes a focus of attention of people, and the improvement of the seismic performance of steel structures is an urgent need of the current building industry. Research shows that when earthquake is resisted, the simple low-yield-point cover plate is used as the energy dissipation part of the steel structure beam-column node, the energy dissipation part can generate obvious plastic deformation and buckling deformation to dissipate earthquake energy, and the deformation of the beam-column node is in an elastic stage or a small-range yield stage, so that the purpose of protecting the main components of the structure is achieved. However, when the energy consumption component encounters a rare earthquake or a major earthquake, plastic hinges are easily formed due to large buckling deformation of the cover plate with the low yield point, the energy consumption component has limited earthquake energy consumption capacity, in addition, due to the generation of the plastic hinges, the bearing capacity of the structure is reduced, and the main components of the structure are difficult to dissipate the earthquake energy, so that the structural design scheme which can meet the requirement of 'falling in great earthquake' becomes a technical problem which needs to be solved urgently.
Disclosure of Invention
In order to solve the problems in the prior art, the invention develops an assembled beam-column joint structure with a buckling constraint device and an installation method thereof, so that the overall safety performance of the structure is improved, and the main parts of the structure can achieve the purpose of energy consumption when the structure encounters rare earthquakes.
The technical scheme adopted by the invention is that,
the utility model provides a take assembled beam column node structure of bucking restraint device, weakens apron and bucking restraint device including cantilever section roof beam, H shaped steel roof beam, funnel formula, the edge of a wing department outside of cantilever section roof beam and H shaped steel roof beam weaken the apron with the help of funnel formula and be connected, bucking restraint device including apron, backing plate, bottom plate and stay bolt, funnel formula weaken the rectangular plate that the apron shape has the arc breach for middle both sides, funnel formula weaken the apron outside be provided with the apron, the inboard is provided with the bottom plate, arc breach department is provided with the backing plate rather than the shape matches, the thickness of pad plate be greater than funnel formula and weaken the thickness of cover plate, two sets of apron, backing plate, bottom plate between with the help of a pair of stay bolt fixed connection.
The thickness difference between the base plate and the funnel type weakening cover plate is 2-4 mm.
The cantilever section beam is connected with the web plate of the H-shaped steel beam through a shear plate.
The cantilever section beam is fixedly connected with the web plate of the H-shaped steel beam through a shear plate and a high-strength bolt.
The cantilever section beam is fixedly connected with the outer side of the flange of the H-shaped steel beam through a funnel type weakening cover plate through a high-strength bolt.
The flange parts of the cantilever section beam and the H-shaped steel beam are provided with bottom plates, and the outer side faces of the flange parts are aligned with the outer side faces of the bottom plates.
A mounting method of an assembled beam-column joint structure with a buckling constraint device comprises the following steps:
a. aligning the cantilever section beam with a web plate and a flange of the H-shaped steel beam and keeping a gap;
b. the funnel type weakened cover plate is arranged on the outer side of the flange of the cantilever section beam and the H-shaped steel beam, the cover plate is arranged on the outer side of the funnel type weakened cover plate, the base plate is arranged on the inner side of the funnel type weakened cover plate, the base plate is arranged at the arc-shaped notch, and the two groups of cover plates, the base plate and the base plate are fixedly connected through a pair of long bolts;
c. the funnel type weakening cover plate is placed on the outer side of the flange of the cantilever section beam and the H-shaped steel beam and fixedly connected with the flange through high-strength bolts, and the shear plate is placed on the web plate of the cantilever section beam and the H-shaped steel beam and fixedly connected with the web plate through high-strength bolts.
The invention has the beneficial effects that:
the funnel-type weakened cover plate is an energy dissipation element with a structure, and the buckling deformation of the energy dissipation element can be effectively controlled by the design of the buckling constraint device, so that the mechanical property of the connection part of the cantilever section beam and the H-shaped steel beam is reserved; the bottom plate is arranged between the cantilever beam and the H-shaped steel beam, and a gap is reserved between the cantilever beam and the H-shaped steel beam, so that the good rotation capacity of the connection part of the energy dissipation element can be ensured.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
in the attached drawings, 1 is a cantilever section beam, 2 is an H-shaped steel beam, 3 is a shear plate, 4 is a funnel type weakening cover plate, 5 is a cover plate, 6 is a base plate, 7 is a bottom plate, 8 is a long bolt, and 9 is a high-strength bolt.
Detailed Description
As shown in fig. 1 and 2, the assembled beam-column joint structure with the buckling constraint device comprises a cantilever section beam 1, an H-shaped steel beam 2, a funnel-type weakened cover plate 4 and the buckling constraint device, wherein the cantilever section beam 1 is connected with the outer side of the flange of the H-shaped steel beam 2 through the funnel-type weakened cover plate 4, the funnel-type weakened cover plate 4 is a LY225 steel plate, and the LY225 steel plate is a low-yield-point steel plate for seismic resistance of a building structure and has the characteristics of extremely low inclusion, ultralow yield point, narrow yield range, high ductility, high toughness and repeated fatigue. Bucking restraint device include apron 5, backing plate 6, bottom plate 7 and long bolt 8, funnel formula weaken apron 4 shape for the middle both sides have the rectangular plate of arc breach, funnel formula weaken apron 4 outside be provided with apron 5, the inboard is provided with bottom plate 7, arc breach department is provided with the backing plate 6 rather than the shape matching, the thickness of backing plate 6 be greater than the thickness that funnel formula weakens apron 4. The two groups of cover plates 5, the backing plate 6 and the bottom plate 7 are fixedly connected by a pair of long bolts 8.
The thickness difference between the base plate 6 and the funnel-type weakened cover plate 4 is 2-4mm, the smaller the thickness difference is, the smaller the gap between the cover plate 5 and the funnel-type weakened cover plate 4 in the buckling restraining device is, the smaller the moving space is, the deformation and rotation of the energy dissipation element are not facilitated, and in addition, the too small gap enables the buckling restraining device to act prematurely, so that the strength of the energy dissipation element is too high, and further the damage to the welding node of the beam column can be caused firstly; the larger the thickness difference is, the larger the gap between the cover plate 5 and the funnel-type weakened cover plate 4 in the buckling constraint device is, the larger the moving space is, the whole stability of the beam-column joint structure is not facilitated, and the effect of the buckling constraint device is weakened.
The web plate of the cantilever section beam 1 and the H-shaped steel beam 2 are connected through the shear plate 3, and the multipoint connection provides firmness for the connection of the cantilever section beam 1 and the H-shaped steel beam 2.
The beam web plate of the cantilever section beam 1 and the H-shaped steel beam 2 are fixedly connected through the shear plate 3 and the high-strength bolt 9, and the rigidity of the connection part is improved.
The cantilever section beam 1 and the flange of the H-shaped steel beam 2 are fixedly connected through the funnel type weakening cover plate 4 and the high-strength bolt 9 by virtue of the funnel type weakening cover plate, so that the rigidity of the connection part is improved.
The flange parts of the cantilever section beam 1 and the H-shaped steel beam 2 are provided with the bottom plate 7, and the outer side face of the flange part is aligned with the outer side face of the bottom plate 7, so that the cantilever section beam 1 and the H-shaped steel beam 2 are applicable to the condition that the flange parts are spaced greatly.
A mounting method of an assembled beam-column joint structure with a buckling constraint device comprises the following steps:
a. aligning the cantilever section beam 1 with a beam web and a flange of the H-shaped steel beam 2 and keeping a gap;
b. the funnel type weakening cover plate 4 is arranged on the outer side of the flange of the cantilever section beam 1 and the H-shaped steel beam 2, the cover plate 5 is arranged on the outer side of the funnel type weakening cover plate 4, the base plate 7 is arranged on the inner side of the funnel type weakening cover plate, the base plate 6 is arranged at the arc-shaped notch, and the two groups of cover plates 5, the base plate 6 and the base plate 7 are fixedly connected through a pair of long bolts 8;
c. the funnel type weakening cover plate 4 is placed on the outer side of the flange of the cantilever section beam 1 and the H-shaped steel beam 2 and fixedly connected through the high-strength bolt 9, and the shear plate 3 is placed on the beam web of the cantilever section beam 1 and the H-shaped steel beam 2 and fixedly connected through the high-strength bolt 9.
The invention, in particular use: the funnel-type weakening cover plate 4 is an energy dissipation element with a structure, the base plate 6 is slightly higher than the energy dissipation plate, and a gap is formed between the energy dissipation element and the cover plate 5 under the action of earthquake protection, so that the energy dissipation element and the cover plate are not in contact with each other, and the buckling restraining device does not influence the stress and deformation of the energy dissipation element. Under the earthquake-proof effect, the energy dissipation element adopts a funnel weakening type, is subjected to plastic deformation or buckling before the beam-column node and dissipates earthquake energy, so that the safety of the main body structure can be ensured, and the fuse of the energy dissipation element structure can be fully exerted. If only the energy consumption plate is arranged, after the plate is subjected to buckling deformation, the buckling deformation degree can be rapidly increased under the action of cyclic tension and compression, so that the bearing capacity of the node is rapidly reduced, the energy consumption capacity of the energy consumption element is influenced, and the fatigue fracture of the energy consumption element is easily caused by large buckling cyclic deformation. After the buckling restraining device is arranged, the buckling degree of the energy dissipation element can be effectively controlled by the buckling restraining device, the buckling deformation degree is prevented from being rapidly increased, the reduction speed of the bearing capacity of the node is delayed, and the energy dissipation capacity of the energy dissipation element is improved.
If the earthquake is increased from the earthquake of setting a defense to the rare earthquake or the violent earthquake, only the connection position of the energy dissipation element is arranged, the increase of the buckling deformation degree can cause the position to easily form the plastic hinge, after the plastic hinge is formed, the force is difficult to be transmitted to the main part of the structure, the structures at two sides of the plastic hinge can only rotate around the plastic hinge, and the energy dissipation capability of the main structure is difficult to be exerted. After the buckling restraining device is additionally arranged, under the condition of large deformation, the base plate 6 and the bottom plate 7 can be respectively extruded with the energy dissipation elements and the beam flange, the strength of the joints of the energy dissipation elements is increased, the formation of plastic hinges is avoided, the joints can transmit loads to the main structure, the bearing and energy dissipation capacity of the main structure can be continuously exerted, and the overall safety of the structure is improved.
In a word, the assembled beam-column node with the buckling constraint device can effectively improve the seismic performance of the node. When the earthquake is prevented, the buckling degree of the energy dissipation element can be controlled by the buckling restraining device, and the energy dissipation capacity of the energy dissipation element is improved. Under the action of rare earthquakes or major earthquakes, the buckling constraint device can improve the strength of the energy consumption connecting position, plays a role in transferring load, and further enables the beam-column node to exert the bearing and energy consumption capacity. In addition, the energy dissipation element and the buckling constraint device are connected through the bolts and are easy to replace, the cost of repairing after an earthquake is greatly reduced, and the requirement of the assembly type steel structure building is met.
Claims (7)
1. The utility model provides a take assembled beam column node structure of bucking restraint device which characterized in that: comprises a cantilever section beam (1), an H-shaped steel beam (2), a funnel type weakening cover plate (4) and a buckling constraint device, the cantilever section beam (1) is connected with the outer side of the flange of the H-shaped steel beam (2) by a funnel type weakening cover plate (4), the buckling restraint device comprises a cover plate (5), a base plate (6), a bottom plate (7) and a long bolt (8), the funnel-type weakening cover plate (4) is a rectangular plate with arc-shaped notches in the middle at two sides, the outer side of the funnel type weakening cover plate (4) is provided with a cover plate (5), the inner side is provided with a bottom plate (7), the arc-shaped gap is provided with a backing plate (6) matched with the arc-shaped gap in shape, the thickness of the backing plate (6) is larger than that of the funnel-type weakened cover plate (4), the two groups of cover plates (5), the base plate (6) and the bottom plate (7) are fixedly connected through a pair of long bolts (8).
2. The fabricated beam-column joint structure with buckling constraint device as claimed in claim 1, wherein: the thickness difference between the base plate (6) and the funnel type weakening cover plate (4) is 2-4 mm.
3. The fabricated beam-column joint structure with buckling constraint device as claimed in claim 1, wherein: the cantilever section beam (1) is connected with a beam web of the H-shaped steel beam (2) through a shear plate (3).
4. The fabricated beam-column joint structure with buckling restraint devices as claimed in claim 3, wherein: the cantilever section beam (1) is fixedly connected with a beam web of the H-shaped steel beam (2) through a shear plate (3) through a high-strength bolt (9).
5. The fabricated beam-column joint structure with buckling constraint device as claimed in claim 1, wherein: the cantilever section beam (1) is fixedly connected with the outer side of the flange of the H-shaped steel beam (2) through a funnel type weakening cover plate (4) through a high-strength bolt (9).
6. The fabricated beam-column joint structure with buckling constraint device as claimed in claim 1, wherein: the cantilever section beam (1) and the flange of the H-shaped steel beam (2) are provided with a bottom plate (7), and the outer side face of the flange is aligned with the outer side face of the bottom plate (7).
7. The method for installing an assembled beam-column joint structure with buckling constraint devices as claimed in claims 1-6, wherein: the method comprises the following steps:
a. aligning the cantilever section beam (1) with a web plate and a flange of the H-shaped steel beam (2) and keeping a gap;
b. a funnel type weakening cover plate (4) is arranged on the outer side of the flange of the cantilever section beam (1) and the H-shaped steel beam (2), a cover plate (5) is arranged on the outer side of the funnel type weakening cover plate (4), a base plate (7) is arranged on the inner side of the funnel type weakening cover plate, a base plate (6) is arranged at the arc-shaped notch, and two groups of cover plates (5), the base plate (6) and the base plate (7) are fixedly connected through a pair of long bolts (8);
c. the funnel type weakening cover plate (4) is placed on the outer side of the flange of the cantilever section beam (1) and the H-shaped steel beam (2) and is fixedly connected with the flange through a high-strength bolt (9), and the shear plate (3) is placed on the web plate of the cantilever section beam (1) and the H-shaped steel beam (2) and is fixedly connected with the web plate through the high-strength bolt (9).
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CN202110150515.XA CN113026943A (en) | 2021-02-04 | 2021-02-04 | Fabricated beam-column joint structure with buckling constraint device and installation method thereof |
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CN202110150515.XA CN113026943A (en) | 2021-02-04 | 2021-02-04 | Fabricated beam-column joint structure with buckling constraint device and installation method thereof |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000144901A (en) * | 1998-11-05 | 2000-05-26 | Nkk Corp | Splice plate and beam joint construction |
CN204919828U (en) * | 2015-09-16 | 2015-12-30 | 常熟古建园林建设集团有限公司 | Archaize building's wooden frame and steel structure column's connection structure |
CN109555230A (en) * | 2018-11-29 | 2019-04-02 | 青岛理工大学 | Partially filled structural frame assembly node with restoration function |
CN110952666A (en) * | 2019-12-27 | 2020-04-03 | 西安理工大学 | Assembled high-ductility high-strength steel beam column rigid connection node |
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2021
- 2021-02-04 CN CN202110150515.XA patent/CN113026943A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000144901A (en) * | 1998-11-05 | 2000-05-26 | Nkk Corp | Splice plate and beam joint construction |
CN204919828U (en) * | 2015-09-16 | 2015-12-30 | 常熟古建园林建设集团有限公司 | Archaize building's wooden frame and steel structure column's connection structure |
CN109555230A (en) * | 2018-11-29 | 2019-04-02 | 青岛理工大学 | Partially filled structural frame assembly node with restoration function |
CN110952666A (en) * | 2019-12-27 | 2020-04-03 | 西安理工大学 | Assembled high-ductility high-strength steel beam column rigid connection node |
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Application publication date: 20210625 |