CN106593059A - Dog-bone joint beam end buckling constraining device - Google Patents

Dog-bone joint beam end buckling constraining device Download PDF

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Publication number
CN106593059A
CN106593059A CN201710018131.6A CN201710018131A CN106593059A CN 106593059 A CN106593059 A CN 106593059A CN 201710018131 A CN201710018131 A CN 201710018131A CN 106593059 A CN106593059 A CN 106593059A
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China
Prior art keywords
dog
bone joint
steel
buckling
constraint
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CN201710018131.6A
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CN106593059B (en
Inventor
吴京
夏天阳
谢鲁齐
李春雨
孟少平
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Southeast University
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Southeast University
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings

Abstract

The invention provides a dog-bone joint beam end buckling constraining device. The device comprises constraining cover plates (1), constraining U-steel (2), filling plates (3) arranged between the constraining cover plates and the constraining U-steel, and connecting bolts (4), wherein the constraining cover plates (1) are arranged on the outer sides of upper and lower flange weakening parts (7-1) at the ends of a steel beam (7) provided with a dog-bone joint; the constraining U-steel (2) is arranged on the portions, corresponding to the two sides of a web, of the flange weakening parts; and the connecting bolts (4) are used for connecting the constraining cover plates, the constraining U-steel and the filling plates to form the complete constraining device. When an earthquake occurs, the beam end flange weakening parts yield in advance of other parts and components, earthquake energy is dissipated through the hysteretic characteristic, and by adoption of the constraining device, press on the beam end flange weakening parts and large-amplitude buckling possibly occurring outside the plane of a steel plate when the corresponding web is pressed and sheared can be limited, shortening of the fatigue lives of the flange weakening parts and degradation of joint rigidity and strength are prevented, the steel beam (7) in a joint area is protected against complete buckling outside the plane, the fullness of a hysteretic curve is ensured, and the joint deformation capacity and ductility and the lateral stability of the beam are improved.

Description

A kind of buckling-restrained device of dog-bone joint beam-ends
Technical field
The invention belongs to building engineering field, is related to steel-frame structure, specially one kind is applied to steel-frame structure Os Canitis The buckling-restrained device of formula node beam-ends.
Background technology
China is an earthquake-prone region, as steel construction is extensively applied in building structure, studies its anti-seismic performance, carries Go out rational Aseismic Design countermeasure to be particularly important.And the north ridge earthquake of the U.S. in 1994 and nineteen ninety-five Japan's Osaka-Kobe earthquake it Afterwards, people increasingly pay close attention to the version and anti-seismic performance of steel structure node, and traditional bean column node is being researched and analysed On the basis of, it is proposed that many improved novel joint forms, can be divided mainly into reinforced and two big class of weakening type.Went out in recent years Existing dog-bone joint belongs to a kind of weakening type novel joint form, and the beam-ends with a certain distance from away from beam-to-column joint reduces the wing Edge size, its fundamental design idea is:By the weakening on the beam-ends edge of a wing, induce beam-ends plastic hinge section from beam-to-column joint outside Move, to avoid residual stress concentrations region at beam-to-column joint, improve the performance of node energy-dissipating property.
Comparison that performance and failure mode of the dog-bone joint under cyclic load have been studied is thorough, test and Theory analysis research all shows which possesses than the more preferable energy dissipation capacity of conventional steel frames node.But with load and cycle-index Increase, after the pressurized particularly pressurized surrender in beam-ends reduced beam section position and steel plate may be produced when correspondingly web is pressurized and is cut and be put down There is a certain degree of rigidity, strength degradation in flexing unstable phenomenon outside face, node hysteresis loop.This edge of a wing may with web The outer flexing unstability of the steel plain of generation, gently then affects the performance of node energy dissipation capacity, and the low week for reducing reduced beam section position is tired It is the labor life-span, heavy then cause node premature degradation.Also the test having shows, as the edge of a wing that dog-bone joint weakens node district is cut Face, causes girder steel out of plane stiffness to reduce, and easily produces the outer complete buckling of girder steel plane.
On the other hand, buckling restrained brace BRB is one kind by external constraint part constraint supporting core plate and limits which The axially loaded component of compressive buckling, can give full play to hysteresis of the core board under circulation tension and compression effect under violent earthquake effect Performance, reaches the purpose of dissipation seismic energy.If the upper and lower reduced beam section portion of dog-bone joint beam-ends can be limited by similar measure After the pressurized particularly pressurized surrender in position and correspondence web is pressurized and issuable flat out-of-plane buckling unstability when being cut, and using about The out of plane stiffness of bundle device prevents steel beam joint area lateral bucking, is beneficial to dog-bone joint energy-dissipating property and energy dissipation capacity Stable performance.
For the problems referred to above, the present invention proposes a kind of buckling-restrained device of dog-bone joint beam-ends:In dog-bone joint beam Hold, and arrange about in the upper and lower reduced beam section position correspondence web both sides of beam-ends Beam channel-section steel, arranges filling plate between constraint cover plate and constraint channel-section steel, will constrain cover plate, constraint channel-section steel and filling by connecting bolt The complete restraint device of plate connection composition.The restraint device can effectively limit pressurized being particularly in the upper and lower reduced beam section position of beam-ends and receive After lateral deflection clothes and correspondence web is pressurized and by the outer amplitude flexing unstability that may occur of steel plain when cutting, preventing may generation Reduced beam section position fatigue life reduce and connection stiffness, strength degradation, prevent node district girder steel occur plane outside integrally bend It is bent, it is ensured that hysteresis loop is full, improves the lateral stability of column joints deformation ability, ductility and beam, gives full play to dog bone type section The excellent energy-dissipating property of point.
The content of the invention
Technical problem, it is an object of the invention to provide a kind of buckling-restrained dress for being applied to steel construction dog-bone joint beam-ends Put, with effectively limit after the pressurized particularly pressurized surrender in the upper and lower reduced beam section position of beam-ends and when correspondence web is pressurized and is cut The outer amplitude flexing unstability that may occur of steel plain, prevents issuable reduced beam section position fatigue life from reducing and saving Point rigidity, strength degradation, prevent node district girder steel from the outer complete buckling of plane occurring, it is ensured that hysteresis loop is full, improves node The lateral stability of deformability, ductility and beam, gives full play to the excellent energy-dissipating property of dog-bone joint.
Technical scheme:The technical scheme of the buckling-restrained device of a kind of dog-bone joint beam-ends that the present invention is adopted for:
The buckling-restrained device of the dog-bone joint beam-ends includes being arranged at the upper and lower reduced beam section portion of dog-bone joint beam-ends Constraining cover plate, the constraint channel-section steel of reduced beam section position correspondence web both sides, constraining cover plate and constrain between channel-section steel on the outside of Filling plate and the connecting bolt by the constraint cover plate, constraint channel-section steel and filling plate connection composition holonomic constriants device.
Bolt hole is provided with described constraint cover plate, constraint channel-section steel and filling plate, is easy to connecting bolt to align and pass through.
Preferably, described constraint channel-section steel internal welding has the ribbed stiffener for avoiding the bolt hole position.
Described constraint cover plate is slightly larger than the upper and lower reduced beam section portion of the dog-bone joint beam-ends with the length of constraint channel-section steel The length of position.
Described constraint channel-section steel is highly slightly less than the clear distance on the dog-bone joint beam-ends between lower flange;It is described about Beam channel-section steel is arranged in the space that dog-bone joint beam-ends weakens between the edge of a wing and correspondence web, and its web is mutually leaned on steel beam web plate. Described filling plate thickness is slightly larger than lower flange thickness, shape and the dog-bone joint beam-ends on the dog-bone joint beam-ends Reduced beam section position shape is consistent up and down;Described filling plate is connected as a single entity or is linked as with described constraint cover plate with constraint channel-section steel Integrally.
There is gap between the buckling-restrained device and the contact surface of girder steel;Preferably, in the gap or it is filled with nothing Binding material.
Caused when the dog-bone joint bears moment of flexure and shearing by above-mentioned measure, the restraint device is not direct It is while participating in axially loaded, after effectively preventing the pressurized particularly pressurized surrender in dog-bone joint beam-ends reduced beam section position and right Answer web pressurized and by amplitude flexing unstability when cutting in the outer possible generation of steel plain, and prevent node district girder steel from side occurring To unstability.
Beneficial effect:
The buckling-restrained device of 1 dog-bone joint beam-ends can effectively limit pressurized being particularly in the upper and lower reduced beam section position of beam-ends and receive After lateral deflection clothes and correspondence web is pressurized and by when cutting, in the outer amplitude flexing unstability that may occur of steel plain, preventing may product Raw reduced beam section position fatigue life reduces and connection stiffness, strength degradation, it is ensured that hysteresis loop is full, gives full play to Os Canitis The excellent energy-dissipating property of formula node.
The buckling-restrained device form of 2 dog-bone joint beam-ends is simple, construction and installation convenient, the mechanism of action is clear and definite, can improve Column joints deformation ability, ductility and dog-bone joint beam lateral stability.
Description of the drawings
During Fig. 1 is an embodiment of the present invention, the buckling-restrained device of dog-bone joint beam-ends is in dog-bone joint beam End scheme of installation.
During Fig. 2 is an embodiment of the present invention, the buckling-restrained device of dog-bone joint beam-ends is in dog-bone joint beam Disassemble schematic diagram and do not draw connecting bolt and non-cohesive material in end.
During Fig. 3 is an embodiment of the present invention, the buckling-restrained device of dog-bone joint beam-ends is in dog-bone joint beam The installation profile at end.
Have in figure:Constraint cover plate 1, constrains channel-section steel 2, and ribbed stiffener 21 fills plate 3, connecting bolt 4, bolt hole 5, soap-free emulsion polymeization The joint face 8 of material 6, the girder steel 7 with dog-bone joint, reduced beam section position 7-1, steel column and girder steel.
Specific embodiment
The buckling-restrained device of the dog-bone joint beam-ends includes being arranged at bottom wing on 7 end of girder steel with dog-bone joint Edge weakens constraining cover plate 1, the constraint channel-section steel 2 of reduced beam section position 7-1 correspondence webs both sides, constraining cover plate 1 on the outside of the 7-1 of position It is connected composition holonomic constriants with the filling plate 3 between constraint channel-section steel 2 and by the constraint cover plate 1, constraint channel-section steel 2 and filling plate 3 The connecting bolt 4 of device, is provided with bolt hole 5 on described constraint cover plate 1, constraint channel-section steel 2 and filling plate 3, is easy to connecting bolt 4 Align and pass through.
The ribbed stiffener 21 for avoiding 5 position of the bolt hole is welded with inside described constraint channel-section steel 2.
Described constraint cover plate 1 is slightly larger than the upper and lower reduced beam section of the dog-bone joint beam-ends with the length of constraint channel-section steel 2 The length of position 7-1.
Described constraint 2 height of channel-section steel is slightly less than the clear distance on the dog-bone joint beam-ends between lower flange;It is described Constraint channel-section steel 2 is arranged in the space that dog-bone joint beam-ends weakens between the position edge of a wing and correspondence web, its web and girder steel abdomen Plate is mutually leaned on.
Described 3 thickness of filling plate is slightly larger than lower flange thickness, shape and the Os Canitis on the dog-bone joint beam-ends The upper and lower reduced beam section position 7-1 shape complementarities of formula node beam-ends;Described filling plate 3 can be linked as with described constraint cover plate 1 Integrally.
There is gap between the buckling-restrained device and the contact surface of girder steel.
In the gap or it is filled with non-cohesive material 6.
Below by taking an embodiment of the present invention as an example, the specific embodiment of the present invention is illustrated.
Buckling-restrained device for steel construction dog-bone joint beam-ends proposed by the invention, will be installed in the beam-ends edge of a wing Weaken position.
1 buckling-restrained device processing
Spot size, the clear distance between flange width, edge of a wing thickness and upper lower flange are weakened according to dog-bone joint beam-ends, Constraint cover plate 1, constraint channel-section steel 2, filling plate 3 and the connecting bolt 4 of corresponding size are chosen and process, in constraint cover plate 1, restraint slot Bolt hole 5 is opened on steel 2 and filling plate 3, welding ribbed stiffener 21 in 5 position of bolt hole is avoided inside constraint channel-section steel 2.
2 buckling-restrained devices are installed
The contact surface of constraint cover plate 1, constraint channel-section steel 2 and filling 3 three of plate and girder steel is coated into non-cohesive material 6, in Canis familiaris L. Holonomic constriants device is combined into by connecting bolt 4 around bone formula node beam-ends reduced beam section position 7-1, is surrounded and is weakened the edge of a wing And correspondence web.
3 beam columns are installed
Carry out conventional beam column of steel structure at the scene to install.
Beam column installation process also can be carried out prior to buckling-restrained device installation process.
Above example is referring to the drawings, to a preferred embodiment of the present invention will be described in detail, those skilled in the art In the case that member by carrying out modification or change on various forms, but the essence without departing substantially from the present invention to above-described embodiment, all Fall in protection scope of the present invention.

Claims (7)

1. the buckling-restrained device of a kind of dog-bone joint beam-ends, it is characterised in that:The buckling-restrained dress of the dog-bone joint beam-ends Put including being arranged at the girder steel with dog-bone joint(7)Hold upper and lower reduced beam section position(7-1)The constraint cover plate in outside(1)、 Reduced beam section position(7-1)The constraint channel-section steel of correspondence web both sides(2), constraint cover plate(1)With constraint channel-section steel(2)Between filling Plate(3)And by the constraint cover plate(1), constraint channel-section steel(2)With filling plate(3)The connecting bolt of connection composition holonomic constriants device (4), described constraint cover plate(1), constraint channel-section steel(2)And filling plate(3)On be provided with bolt hole(5), it is easy to connecting bolt(4)It is right It is neat and pass through.
2. the buckling-restrained device of dog-bone joint beam-ends according to claim 1, it is characterised in that:Described constraint channel-section steel (2)Inside is welded with avoids the bolt hole(5)The ribbed stiffener of position(21).
3. the buckling-restrained device of dog-bone joint beam-ends according to claim 1, it is characterised in that:Described constraint cover plate (1)With constraint channel-section steel(2)Length be slightly larger than the upper and lower reduced beam section position of the dog-bone joint beam-ends(7-1)Length.
4. the buckling-restrained device of dog-bone joint beam-ends according to claim 1, it is characterised in that:Described constraint channel-section steel (2)Clear distance between lower flange on the dog-bone joint beam-ends is slightly less than highly;The constraint channel-section steel(2)It is arranged in Os Canitis Formula node beam-ends weakens the space between the position edge of a wing and correspondence web, and its web is mutually leaned on steel beam web plate.
5. the buckling-restrained device of dog-bone joint beam-ends according to claim 1, it is characterised in that:Described filling plate (3)Thickness is slightly larger than lower flange thickness, shape and lower flange on the dog-bone joint beam-ends on the dog-bone joint beam-ends Weaken position(7-1)Shape complementarity;Described filling plate(3)With constraint channel-section steel(2)Be connected as a single entity or with described constraint cover plate (1)It is connected as a single entity.
6. the buckling-restrained device of dog-bone joint beam-ends according to claim 1, it is characterised in that:The buckling-restrained dress Put and there is gap and the contact surface of girder steel between.
7. the buckling-restrained device of dog-bone joint beam-ends according to claim 6, it is characterised in that:In the gap or fill out There is non-cohesive material(6).
CN201710018131.6A 2017-01-11 2017-01-11 Dog bone type node beam end buckling restraint device Active CN106593059B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109629670A (en) * 2019-01-25 2019-04-16 北京工业大学 A kind of assembled Self-resetting double flute steel girder frame system of recoverable function
CN109629684A (en) * 2019-01-25 2019-04-16 北京工业大学 A kind of anti-buckling groove profile web cutting member beam column node connection device of the assembled of recoverable function
CN109629687A (en) * 2019-01-25 2019-04-16 北京工业大学 A kind of anti-buckling double flute beam-column nodal connection device of the assembled of recoverable function
CN109853733A (en) * 2019-01-25 2019-06-07 北京工业大学 A kind of assembled self reset curvature-prevention inverted L shape web cutting member frame system of recoverable function
CN109853753A (en) * 2019-01-25 2019-06-07 北京工业大学 A kind of anti-buckling inverted L shape web cutting member combined joint attachment device of recoverable function assembled
CN112982664A (en) * 2021-03-08 2021-06-18 四川华浩建筑工程有限公司 Buckling restrained steel structure beam column connecting node

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148642A (en) * 1988-08-24 1992-09-22 Arbed S.A. Antiseismic steel structural work
US5913794A (en) * 1996-11-21 1999-06-22 National Science Council Ductile steel beam-to-column connection
CN102444292A (en) * 2011-10-24 2012-05-09 哈尔滨工业大学 Anti-collapse reinforcement method for frame-anti-buckling support system
CN103206029A (en) * 2013-05-10 2013-07-17 东南大学 Micro-vibration energy-consumption viscoelastic buckling restrained brace
US20150225972A1 (en) * 2014-02-07 2015-08-13 Chong-Shien Tsai Bracing device
CN105569204A (en) * 2016-02-01 2016-05-11 中国地震局工程力学研究所 Replaceable beam-column joint earthquake damage control device
CN105625585A (en) * 2016-02-03 2016-06-01 山东大学 Buckling constraint steel structure beam-column connection and steel structure building
CN205637130U (en) * 2016-05-19 2016-10-12 山东大学 Bucking restraint formula girder steel styletable board connected node and steel construction building
CN205637214U (en) * 2016-04-27 2016-10-12 福建工程学院 Prefabricated assembled concrete column - concrete beam prevents bucking power consumption node entirely
CN206409009U (en) * 2017-01-11 2017-08-15 东南大学 A kind of buckling-restrained device of dog-bone joint beam-ends

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148642A (en) * 1988-08-24 1992-09-22 Arbed S.A. Antiseismic steel structural work
US5913794A (en) * 1996-11-21 1999-06-22 National Science Council Ductile steel beam-to-column connection
CN102444292A (en) * 2011-10-24 2012-05-09 哈尔滨工业大学 Anti-collapse reinforcement method for frame-anti-buckling support system
CN103206029A (en) * 2013-05-10 2013-07-17 东南大学 Micro-vibration energy-consumption viscoelastic buckling restrained brace
US20150225972A1 (en) * 2014-02-07 2015-08-13 Chong-Shien Tsai Bracing device
CN105569204A (en) * 2016-02-01 2016-05-11 中国地震局工程力学研究所 Replaceable beam-column joint earthquake damage control device
CN105625585A (en) * 2016-02-03 2016-06-01 山东大学 Buckling constraint steel structure beam-column connection and steel structure building
CN205637214U (en) * 2016-04-27 2016-10-12 福建工程学院 Prefabricated assembled concrete column - concrete beam prevents bucking power consumption node entirely
CN205637130U (en) * 2016-05-19 2016-10-12 山东大学 Bucking restraint formula girder steel styletable board connected node and steel construction building
CN206409009U (en) * 2017-01-11 2017-08-15 东南大学 A kind of buckling-restrained device of dog-bone joint beam-ends

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109629670A (en) * 2019-01-25 2019-04-16 北京工业大学 A kind of assembled Self-resetting double flute steel girder frame system of recoverable function
CN109629684A (en) * 2019-01-25 2019-04-16 北京工业大学 A kind of anti-buckling groove profile web cutting member beam column node connection device of the assembled of recoverable function
CN109629687A (en) * 2019-01-25 2019-04-16 北京工业大学 A kind of anti-buckling double flute beam-column nodal connection device of the assembled of recoverable function
CN109853733A (en) * 2019-01-25 2019-06-07 北京工业大学 A kind of assembled self reset curvature-prevention inverted L shape web cutting member frame system of recoverable function
CN109853753A (en) * 2019-01-25 2019-06-07 北京工业大学 A kind of anti-buckling inverted L shape web cutting member combined joint attachment device of recoverable function assembled
CN112982664A (en) * 2021-03-08 2021-06-18 四川华浩建筑工程有限公司 Buckling restrained steel structure beam column connecting node

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