CN106436924A - Steel pipe concrete column variable section broken-line-shaped steel bracket and connecting construction method thereof - Google Patents
Steel pipe concrete column variable section broken-line-shaped steel bracket and connecting construction method thereof Download PDFInfo
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- CN106436924A CN106436924A CN201610704402.9A CN201610704402A CN106436924A CN 106436924 A CN106436924 A CN 106436924A CN 201610704402 A CN201610704402 A CN 201610704402A CN 106436924 A CN106436924 A CN 106436924A
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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Abstract
A steel pipe concrete column variable section broken-line-shaped steel bracket comprises an upper flange plate, a lower flange plate and a web perpendicularly connected between the upper flange plate and the lower flange plate. The upper flange plate and the lower flange plate are the same in structure and each comprises N flange plate bodies and N-1 transition sections. Every two adjacent flange plate bodies are connected through one corresponding transition section, and thus a broken-line-shaped multilayer structure is formed. The elevation of the flange plate bodies is sequentially decreased section layer by section layer, the width is decreased layer by layer, the height difference between every two adjacent flange plate bodies is 2d, and d is the steel bar diameter. A construction method of the variable section broken-line-shaped steel bracket comprises the following steps of S1, variable section broken-line-shaped steel bracket deep design, S2, steel bracket segmented manufacturing in a processing factory, S3, steel pipe column and steel bracket field installation welding, S4, simulation test, steel bar welding and binding, and S5, concrete pouring and maintenance. According to the construction method for connecting a steel pipe concrete column with a concrete beam by using the variable section broken-line-shaped steel bracket, operation is easy and convenient, the construction process quality is controllable, and the structure safety can be improved.
Description
Technical field
The present invention relates to a kind of building structure and construction method, particularly a kind of steel core concrete column variable cross-section fold-line-shaped steel
Bracket and construction method thereof.
Background technology
Reinforced beam（RC beam）Steel core concrete column combining structure bean column node is also referred to as joint cores, due to this
The stress in region is complicated, concentration, and its destruction can result in ruining of total system, and the therefore design of bean column node is also
The emphasis of this combining structure；Owing to reinforced beam is connected the company relating between two kinds of different structures with steel core concrete column
Connecing, its joint structure is processed exists very big technical barrier always：Beam muscle, post muscle, bracket, stiffener etc. are staggered to be collected, node
The construction spaces such as reinforcing bar binding welding, concreting are narrow, cause Bar Anchorage quality, concreting packing to be all difficult to
Control, has a strong impact on structure safety.
Content of the invention
It is an object of the invention to provide a kind of steel core concrete column variable cross-section fold-line-shaped steel corbel and connection construction side thereof
Method, to overcome the above-mentioned deficiency existing for prior art.
The present invention adopts the technical scheme that：
A kind of steel core concrete column variable cross-section fold-line-shaped steel corbel, including top flange plate and bottom wing listrium, and be vertically connected on
Web between top flange plate and bottom wing listrium, web is positioned on the center line of top flange plate and bottom wing listrium length direction；
Described top flange plate is identical with lower flange plate structure, include N section flange plate and N-1 section changeover portion, and the value of N is 2 or 3,
Between two sections of adjacent flange plates, the changeover portion by tilting connects, thus constitutes two-layer or the three-decker of fold-line-shaped：First
Section i.e. ground floor is connected with the second segment i.e. second layer by changeover portion, and the second segment i.e. second layer is the by changeover portion and the 3rd section
Three layers of connection；
The layer reduction piecemeal successively of the absolute altitude of flange plate, width successively reduces, and the difference in height between adjacent two layers flange plate is 2d, even
The top shape of the web being connected between top flange plate with bottom wing listrium is corresponding with the fold-line-shaped of top flange plate, the following shape of web
Shape is corresponding with the fold-line-shaped of bottom wing listrium；Above-mentioned d is for intending the diameter of the beam steel of welding.
Its further technical scheme is：
Above described top flange plate bottom surface, bottom wing listrium and the left and right sides of web are respectively provided with shear stud, shearing resistance bolt
The specification of nail is that Ф 19@is the 200th, two-way, length L=100mm.
Further：
Described top flange plate and bottom wing listrium are respectively equipped with 2 row's air-vents along its length, and air-vent aperture is 25mm, ventilative
It is spaced apart 150～200mm between the hole of hole.
Its another technical scheme is：
A kind of connection construction method of steel core concrete column variable cross-section fold-line-shaped steel corbel, it is characterised in that：The method is to utilize
Above-mentioned a kind of steel core concrete column variable cross-section fold-line-shaped steel corbel joint steel pipe concrete column and the construction method of beams of concrete,
Comprise the steps：
S1：Variable cross-section fold-line-shaped steel corbel Deepen Design
Indulge muscle drawing according to beam, utilize AutoCAD, searcher's TSSD, TeklaStructures and Revit software two-dimentional, three-dimensional
Combine to design drawing according to 1:1 setting-out, modeling；Arrangement is optimized to reinforcing bar, corresponding variable cross-section fold-line-shaped steel is set
Bracket, steel corbel size：
S11：According to reinforcing bar row N determine top flange plate and bottom wing listrium bending number of times and changeover portion put the slope gradient
Reinforcing bar row is N, then top flange plate and bottom wing listrium bending number of times are N-1, and if N is 2, then rolling over number of times is 1, as such as N is
3, then rolling over number of times is 2；
The slope gradient of putting of changeover portion is 2d/180=2 × 28/180=0.31=31%；
S12：Design the length and width of each section, i.e. each layer of top flange plate and bottom wing listrium
Length Controlling principle：The length of the flange plate of every layer is more than the lap of splice of beam steel：When the beam steel connecting is
During HPB300 reinforcing bar, a length of L of every layer of flange plate>4d, when the beam steel connecting is other trade mark reinforcing bars, every layer of flange plate is long
Degree L>5d；
Width control system principle：The width of flange plate is less than the width of reinforced beam and successively reduces；Flange plate outward flange away from
Distance from beam limit is former to ensure the protective layer thickness of concrete coarse aggregate droping space, vibrating head placement space and beam muscle
Then；Above-mentioned d is the beam steel diameter connecting；
S2：Variable cross-section fold-line-shaped steel corbel processing and fabricating
At processing factory's sectional making steel corbel：
S21：For welding first paragraph top flange plate and the bottom wing listrium of first row concrete beam reinforcing and being connected to this section
Web between flange plate and bottom wing listrium is with steel pipe column processing and fabricating, thus constitutes the being connected on steel pipe column ring flat-plate
One I-steel bracket section；
S22：Be connected to for welding the second segment top flange plate of second row concrete beam reinforcing and lower flange front edge of board/
Lower First Transition section rear end, welds up/down flange plate, the web between up/down First Transition section simultaneously, thus constitutes to be connected
Second I-steel bracket section；
S23：It when being 3 such as N, is connected to respectively weld by up/down the second changeover portion in second segment up/down flange plate rear end
3rd section of up/down flange plate of three row's concrete beam reinforcings, welds up/down the second changeover portion, the 3rd section of up/down flange plate simultaneously
Between web；
S24：Equidistant along its length on steel corbel up/down flange plate and up/down changeover portion offer two row's air-vents, ventilative
Aperture, hole is 25mm, is spaced apart 150～200mm between air-vent hole；
S3：Steel pipe column, the welding of steel corbel in-site installation
S31：The machined steel corbel made is transported to job site, and first I-steel bracket section is existing in construction with steel column
Field is co-mounted to position；
S32：Utilize the thick 200mm width steel plate of one piece of 20mm as positioning assembled plate, use double 8 Φ 22.0 bolts by second work
The web of the web of Zee bar steel Z bracket section and first I-steel bracket section connects fixing temporarily, checks and checks bracket absolute altitude,
Use the weldering of V-arrangement full penetration successively by the top flange plate of first I-steel bracket section and second I-steel bracket section again
Top flange plate welds, then the bottom wing by the bottom wing listrium of first I-steel bracket section and second I-steel bracket section
Listrium welds；Finally unload positioning assembled plate, by web and second I-steel bracket of first I-steel bracket section
The web welding of section；
S33：On top flange plate bottom surface, bottom wing listrium and the left and right sides of web are respectively welded shear stud；Shearing resistance
The specification of peg is Ф 19@200, length L=100mm；
S4：Simulated test, reinforcement welding, colligation
S41：Simulation welding operating mode on steel plate for the reinforcement welding, the test specimen of manufacture craft test, carry out tension test, test
After qualified, carry out next step welding job；
S42：Carry out reinforcement welding operation in order in strict accordance with the construction drawing after in-depth, start successively to weld from the bottom, first
Weld N row's concrete beam reinforcing of bottom wing listrium, N-1 row's concrete beam reinforcing successively until first row concrete beam reinforcing, then
Weld N row's concrete beam reinforcing of top flange plate, N-1 row's concrete beam reinforcing successively until first row concrete beam reinforcing,
Check the welding of main muscle qualified after colligation stirrup again；
S43：For preventing the blocked up cracking of plain concrete, at change absolute altitude, longitudinally set Ф 4@150 along beam bottom steel corbel strengthen
Reinforcing bar, forms bar-mat reinforcement together with beam stirrup；
S44：Welding uses CO2 gas shielded arc welding, and weld seam form is welding by both sides 8d, and d is bar diameter；
S5：Concreting and maintenance
S51：First pour from the side of beam during concreting, concrete is depressed into bottom the steel corbel of beam side another of beam
Side, in order to avoid there is hollowing phenomenon in bracket bottom surface；
S52：Pouring while vibrate, using plug-in type vibrating rod to vibrate, be inserted perpendicularly into, fast inserting is pulled out slowly, each vibrating time
For 20-30s, coordinate tamping at the intensive local use crooked chisel of reinforcing bar；
S53：Concrete strength reach requirement form removal after stretch wrap film or film carry out maintenance immediately.
Owing to using said structure, the one steel core concrete column variable cross-section fold-line-shaped steel corbel of the present invention and connection thereof are executed
Work method has the advantages that：
1. quality is guaranteed：This device makes bean column node Bar Anchorage quality and concreting packing all effectively be controlled
System, it is ensured that bean column node construction quality, improves the security of structure；
（1）RC joist steel pipe concrete column combining structure bean column node beam steel anchoring quality significantly improves, and by the design, fills
Dividing and ensure that the operating space that beam muscle welds, weld size reaches requirement, and welding quality is effectively controlled, it is ensured that all joist steels
Muscle is anchored effectively, the problem that when thoroughly solving beam steel overlap, part reinforcing bar cannot be carried out welding anchoring；
（2）By changing steel corbel cross-sectional sizes, solve concrete coarse aggregate at bean column node and be difficult to, be difficult to vibrate, easily
Obtain the common quality defects such as cellular cavity, by the design of fold-line-shaped steel corbel, it is ensured that vibrating head has enough placement spaces, strengthen node
Concrete vibrating, it is ensured that concrete pouring quality；Exempt under perforate state at steel pipe, can realize that multilayer beam indulges muscle effectively and easily
It is soldered on steel corbel；
2. environmental protection and economy：Under equal construction environment, steel corbel can make in factory in advance, can add according to calculating requirement
Work, combines with modern architecture industrialization, reaches to save the purpose of material, green construction；Efficiency of construction improves simultaneously, overall work
Phase is shorter, reduces the workload of field engineering 20%～30%；
3. new technology-BIM technology application：Use computer two-dimensional, the in-depth of 3-D technology Computer Aided Design, precalculate steel corbel pre-
Assembled, steel bar preassembling arrangement, welding, by directly perceived for problem, show all sidedly, before construction, solve problem, greatly reduce
The mistake that difficulty of construction and construction are likely to occur, installation accuracy is high, work progress is quality controllable, safety；
4. can range wide, steel core concrete column variable cross-section fold-line-shaped bracket bar connecting construction technology is than conventional bean column node
The practicality of installation method, adaptability are higher, are suitable for various types of（RC beam）Steel core concrete column combination structure node is executed
Work.
Below, in conjunction with accompanying drawing a kind of steel core concrete column variable cross-section fold-line-shaped steel corbel and connection thereof to the one of the present invention
The technical characteristic of construction method is further described.
Brief description
Fig. 1：The one steel core concrete column variable cross-section fold-line-shaped steel corbel skeleton full-page proof schematic diagram of the present invention；
Fig. 2：The B-B sectional view of Fig. 1；
Fig. 3：The C-C sectional view of Fig. 1；
Fig. 4：The A-A sectional view of Fig. 1；
Fig. 5：The present invention one steel core concrete column variable cross-section fold-line-shaped bracket beam bar connecting plane（2 placing of reinforcements）；
Fig. 6：The present invention one steel core concrete column variable cross-section fold-line-shaped bracket beam bar connecting plane（3 placing of reinforcements）；
In figure：
1-steel pipe column, 2-top flange plate, 21-first paragraph, 22-changeover portion, 23-second segment, 24-air-vent, 3-abdomen
Plate, 4-bottom wing listrium, 5-shear stud, 6-stiffener, 7-ring flat-plate, 8-reinforced beam, 9-first row reinforcing bar,
10-second row reinforcing bar, 11-the 3rd placing of reinforcement.
Detailed description of the invention
Embodiment one
A kind of steel core concrete column variable cross-section fold-line-shaped steel corbel, including top flange plate 2 and bottom wing listrium 4, and vertically connect
Web 3 between top flange plate and bottom wing listrium, web is positioned on the center line of top flange plate and bottom wing listrium length direction；
Described top flange plate is identical with lower flange plate structure, include 1 section of changeover portion of 2 sections of flange plates, passes through between two sections of flange plates
The changeover portion tilting connects, thus constitutes the double-layer structure of fold-line-shaped：First paragraph i.e. ground floor by changeover portion with second segment is
The second layer connects；The absolute altitude of second layer flange plate is lower than ground floor, and width ratio ground floor is little, the difference in height between two-layer flange plate
For 2d, the top shape of the web being connected between top flange plate with bottom wing listrium is corresponding with the fold-line-shaped of top flange plate, web
Following shape corresponding with the fold-line-shaped of bottom wing listrium；Above-mentioned d is for intending the diameter of the reinforcing bar of welding.
In the present embodiment, the long 450mm of first paragraph flange plate, its outward flange distance beam limit 55mm；For welding the first stringer
Reinforcing bar；First Transition segment length 180mm；Second segment cross section diminishes to distance beam limit 200mm.
Above described top flange plate bottom surface, bottom wing listrium and the left and right sides of web are respectively provided with shear stud, anti-
The specification cutting peg is that Ф 19@is the 200th, two-way, length L=100mm.
Described top flange plate and bottom wing listrium are respectively equipped with 2 row's air-vents along its length, and air-vent aperture is 25mm,
It is spaced apart 150～200mm between air-vent hole.
Embodiment two
A kind of steel core concrete column variable cross-section fold-line-shaped steel corbel, including top flange plate 2 and bottom wing listrium 4, and vertically connect
Web 3 between top flange plate and bottom wing listrium, web is positioned on the center line of top flange plate and bottom wing listrium length direction；
Described top flange plate is identical with lower flange plate structure, include 3 sections of flange plates and 2 sections of changeover portions, adjacent two sections of flange plates it
Between connected by the changeover portion tilting, thus constitute the three-decker of fold-line-shaped：First paragraph i.e. ground floor passes through changeover portion and the
The two sections i.e. second layer connects, and the second segment i.e. second layer passes through changeover portion and the 3rd section i.e. third layer connects；
Above described top flange plate bottom surface, bottom wing listrium and the left and right sides of web are respectively provided with shear stud, shearing resistance bolt
The specification of nail is that Ф 19@is the 200th, two-way, length L=100mm.
Described top flange plate and bottom wing listrium are respectively equipped with 2 row's air-vents along its length, and air-vent aperture is 25mm,
It is spaced apart 150～200mm between air-vent hole.
Embodiment three
A kind of connection construction method of steel core concrete column variable cross-section fold-line-shaped steel corbel, the method is to utilize described in embodiment one
The construction method of a kind of steel core concrete column variable cross-section fold-line-shaped steel corbel joint steel pipe concrete column and beams of concrete, including
Following step：
S1：Variable cross-section fold-line-shaped steel corbel Deepen Design
Indulge muscle drawing according to beam, utilize AutoCAD, searcher's TSSD, TeklaStructures and Revit software two-dimentional, three-dimensional
Combine to design drawing according to 1:1 setting-out, modeling；Arrangement is optimized to reinforcing bar, corresponding variable cross-section fold-line-shaped steel is set
Bracket, steel corbel size：
S11：According to reinforcing bar row N determine top flange plate and bottom wing listrium bending number of times and changeover portion put the slope gradient
Reinforcing bar row is N, then top flange plate and bottom wing listrium bending number of times are N-1, and if N is 2, then rolling over number of times is 1, as such as N is
3, then rolling over number of times is 2；
The slope gradient of putting of changeover portion is 2d/180=2 × 28/180=0.31=31%；
S12：Design the length and width of each section, i.e. each layer of top flange plate and bottom wing listrium
Length Controlling principle：The length of the flange plate of every layer is more than the lap of splice of beam steel：When the beam steel connecting is
During HPB300 reinforcing bar, a length of L of every layer of flange plate>4d, when the beam steel connecting is other trade mark reinforcing bars, every layer of flange plate is long
Degree L>5d；
Width control system principle：The width of flange plate is less than the width of reinforced beam and successively reduces；Flange plate outward flange away from
Distance from beam limit is former to ensure the protective layer thickness of concrete coarse aggregate droping space, vibrating head placement space and beam muscle
Then；Above-mentioned d is the beam steel diameter connecting；
S2：Variable cross-section fold-line-shaped steel corbel processing and fabricating
At processing factory's sectional making steel corbel：
S21：For welding first paragraph top flange plate and the bottom wing listrium of first row concrete beam reinforcing and being connected to this section
Web between flange plate and bottom wing listrium is with steel pipe column processing and fabricating, thus constitutes and be connected on steel pipe column ring flat-plate 7
First I-steel bracket section；
S22：Be connected to for welding the second segment top flange plate of second row concrete beam reinforcing and lower flange front edge of board/
Lower First Transition section rear end, welds up/down flange plate, the web between up/down First Transition section simultaneously, thus constitutes to be connected
Second I-steel bracket section；
S23：It when being 3 such as N, is connected to respectively weld by up/down the second changeover portion in second segment up/down flange plate rear end
3rd section of up/down flange plate of three row's concrete beam reinforcings, welds up/down the second changeover portion, the 3rd section of up/down flange plate simultaneously
Between web；
S24：Equidistant along its length on steel corbel up/down flange plate and up/down changeover portion offer two row's air-vents, ventilative
Aperture, hole is 25mm, is spaced apart 150～200mm between air-vent hole；
S3：Steel pipe column, the welding of steel corbel in-site installation
S31：The machined steel corbel made is transported to job site, and first I-steel bracket section is existing in construction with steel column
Field is co-mounted to position；
S32：Utilize the thick 200mm width steel plate of one piece of 20mm as positioning assembled plate, use double 8 Φ 22.0 bolts by second work
The web of the web of Zee bar steel Z bracket section and first I-steel bracket section connects fixing temporarily, checks and checks bracket absolute altitude,
Use the weldering of V-arrangement full penetration successively by the top flange plate of first I-steel bracket section and second I-steel bracket section again
Top flange plate welds, then the bottom wing by the bottom wing listrium of first I-steel bracket section and second I-steel bracket section
Listrium welds；Finally unload positioning assembled plate, by web and second I-steel bracket of first I-steel bracket section
The web welding of section；
S33：On top flange plate bottom surface, bottom wing listrium and the left and right sides of web are respectively welded shear stud；Shearing resistance
The specification of peg is Ф 19@200, length L=100mm；
S4：Simulated test, reinforcement welding, colligation
S41：Simulation welding operating mode on steel plate for the reinforcement welding, the test specimen of manufacture craft test, carry out tension test, test
After qualified, carry out next step welding job；
S42：Carry out reinforcement welding operation in order in strict accordance with the construction drawing after in-depth, start successively to weld from the bottom, first
Weld N row's concrete beam reinforcing of bottom wing listrium, N-1 row's concrete beam reinforcing successively until first row concrete beam reinforcing, then
Weld N row's concrete beam reinforcing of top flange plate, N-1 row's concrete beam reinforcing successively until first row concrete beam reinforcing,
Check the welding of main muscle qualified after colligation stirrup again；
S43：For preventing the blocked up cracking of plain concrete, at change absolute altitude, longitudinally set Ф 4@150 along beam bottom steel corbel strengthen
Reinforcing bar 6, forms bar-mat reinforcement together with beam stirrup；
S44：Welding uses CO2 gas shielded arc welding, and weld seam form is welding by both sides 8d, and d is bar diameter；
S5：Concreting and maintenance
In above-described embodiment three：
1. when carrying out step S23, when being 3 such as N, then divided by up/down the second changeover portion in second segment up/down flange plate rear end
Be not connected to weld the 3rd section of up/down flange plate of the 3rd row's concrete beam reinforcing, weld simultaneously up/down the second changeover portion,
Web between 3rd section of up/down flange plate.
2. when carrying out step S5：Steel core concrete column and beams of concrete are carried out pouring and maintenance by technique routinely,
Including：
S51：First pour from the side of beam during concreting, concrete is depressed into bottom the steel corbel of beam side another of beam
Side, in order to avoid there is hollowing phenomenon in bracket bottom surface；
S52：Pouring while vibrate, using plug-in type vibrating rod to vibrate, be inserted perpendicularly into, fast inserting is pulled out slowly, each vibrating time
For 20-30s, coordinate tamping at the intensive local use crooked chisel of reinforcing bar；
S53：Concrete strength reach requirement form removal after stretch wrap film or film carry out maintenance immediately.
3. the length with regard to flange plate：The length of the flange plate of general every layer is more than the lap of splice of reinforcing bar, but examines
Consider and affect reinforcement welding curtailment to because of extraneous factors such as welder's levels, for ensureing the validity that node connects, the wing of every layer
Listrium can arrange longer, can be 6～8d, and total length is the summation that every layer of weld length adds bending length in theory, but examines
If considering the rigidity arriving beam to suddenly change at steel bar welding connecting point position, at this, stress distribution can be extremely complex, has quality and potential safety hazard,
So arranging more to lengthen bracket, exceeding reinforcement welding position, bracket length is generally higher than 1.5 times of deck-moldings.
Claims (4)
1. a steel core concrete column variable cross-section fold-line-shaped steel corbel, including top flange plate and bottom wing listrium, and vertically connect
Web between top flange plate and bottom wing listrium, web is positioned on the center line of top flange plate and bottom wing listrium length direction；
It is characterized in that：Described top flange plate is identical with lower flange plate structure, include N section flange plate and N-1 section changeover portion, N's
Value is 2 or 3, and between two sections of adjacent flange plates, the changeover portion by tilting connects, thus constitutes the two-layer or three of fold-line-shaped
Rotating fields：First paragraph i.e. ground floor is connected with the second segment i.e. second layer by changeover portion, and the second segment i.e. second layer passes through changeover portion
It is connected with the 3rd section of i.e. third layer；
The layer reduction piecemeal successively of the absolute altitude of flange plate, width successively reduces, and the difference in height between adjacent two layers flange plate is 2d, even
The top shape of the web being connected between top flange plate with bottom wing listrium is corresponding with the fold-line-shaped of top flange plate, the following shape of web
Shape is corresponding with the fold-line-shaped of bottom wing listrium；Above-mentioned d is for intending the diameter of the beam steel of welding.
2. a kind of steel core concrete column variable cross-section fold-line-shaped steel corbel according to claim 1, it is characterised in that：On described
Above flange plate bottom surface, bottom wing listrium and the left and right sides of web are respectively provided with shear stud, the specification of shear stud is
Ф 19@is the 200th, two-way, length L=100mm.
3. a kind of steel core concrete column variable cross-section fold-line-shaped steel corbel according to claim 2, it is characterised in that：On described
Flange plate and bottom wing listrium are respectively equipped with 2 row's air-vents along its length, and air-vent aperture is 25mm, between air-vent hole
Be spaced apart 150～200mm.
4. the connection construction method of a steel core concrete column variable cross-section fold-line-shaped steel corbel, it is characterised in that：The method is profit
With a kind of steel core concrete column variable cross-section fold-line-shaped steel corbel joint steel pipe concrete column described in claim 3 and beams of concrete
Construction method, comprise the steps：
S1：Variable cross-section fold-line-shaped steel corbel Deepen Design
Indulge muscle drawing according to beam, utilize AutoCAD, searcher's TSSD, TeklaStructures and Revit software two-dimentional, three-dimensional
Combine to design drawing according to 1:1 setting-out, modeling；Arrangement is optimized to reinforcing bar, corresponding variable cross-section fold-line-shaped steel is set
Bracket, steel corbel size：
S11：Determine that top flange plate and bottom wing listrium bend number of times and the slope gradient reinforcing bar of putting of changeover portion is arranged according to reinforcing bar row N
Number is N, then top flange plate and bottom wing listrium bending number of times are N-1, and if N is 2, then rolling over number of times is 1, if such as N is 3, then rolls over number of times
It is 2；Changeover portion put slope gradient 2d/180=2 × 28/180=0.31=31%；
S12：Design the length and width of each section, i.e. each layer of top flange plate and bottom wing listrium
Length Controlling principle：The length of the flange plate of every layer is more than the lap of splice of beam steel：When the beam steel connecting is
During HPB300 reinforcing bar, a length of L of every layer of flange plate>4d, when the beam steel connecting is other trade mark reinforcing bars, every layer of flange plate is long
Degree L>5d；
Width control system principle：The width of flange plate is less than the width of reinforced beam and successively reduces；Flange plate outward flange away from
Distance from beam limit is former to ensure the protective layer thickness of concrete coarse aggregate droping space, vibrating head placement space and beam muscle
Then；Above-mentioned d is the beam steel diameter connecting；
S2：Variable cross-section fold-line-shaped steel corbel processing and fabricating
At processing factory's sectional making steel corbel：
S21：For welding first paragraph top flange plate and the bottom wing listrium of first row concrete beam reinforcing and being connected to this section
Web between flange plate and bottom wing listrium is with steel pipe column processing and fabricating, thus constitutes the being connected on steel pipe column ring flat-plate
One I-steel bracket section；
S22：Be connected to for welding the second segment top flange plate of second row concrete beam reinforcing and lower flange front edge of board/
Lower First Transition section rear end, welds up/down flange plate, the web between up/down First Transition section simultaneously, thus constitutes to be connected
Second I-steel bracket section；
S23：It when being 3 such as N, is connected to respectively weld by up/down the second changeover portion in second segment up/down flange plate rear end
3rd section of up/down flange plate of three row's concrete beam reinforcings, welds up/down the second changeover portion, the 3rd section of up/down flange plate simultaneously
Between web；
S24：Equidistant along its length on steel corbel up/down flange plate and up/down changeover portion offer two row's air-vents, ventilative
Aperture, hole is 25mm, is spaced apart 150～200mm between air-vent hole；
S3：Steel pipe column, the welding of steel corbel in-site installation
S31：The machined steel corbel made is transported to job site, and first I-steel bracket section is existing in construction with steel column
Field is co-mounted to position；
S32：Utilize the thick 200mm width steel plate of one piece of 20mm as positioning assembled plate, use double 8 Φ 22.0 bolts by second work
The web of the web of Zee bar steel Z bracket section and first I-steel bracket section connects fixing temporarily, checks and checks bracket absolute altitude,
Use the weldering of V-arrangement full penetration successively by the top flange plate of first I-steel bracket section and second I-steel bracket section again
Top flange plate welds, then the bottom wing by the bottom wing listrium of first I-steel bracket section and second I-steel bracket section
Listrium welds；Finally unload positioning assembled plate, by web and second I-steel bracket of first I-steel bracket section
The web welding of section；
S33：On top flange plate bottom surface, bottom wing listrium and the left and right sides of web are respectively welded shear stud；Shearing resistance
The specification of peg is Ф 19@200, length L=100mm；
S4：Simulated test, reinforcement welding, colligation
S41：Simulation welding operating mode on steel plate for the reinforcement welding, the test specimen of manufacture craft test, carry out tension test, test
After qualified, carry out next step welding job；
S42：Carry out reinforcement welding operation in order in strict accordance with the construction drawing after in-depth, start successively to weld from the bottom, first
Weld N row's concrete beam reinforcing of bottom wing listrium, N-1 row's concrete beam reinforcing successively until first row concrete beam reinforcing, then
Weld N row's concrete beam reinforcing of top flange plate, N-1 row's concrete beam reinforcing successively until first row concrete beam reinforcing,
Check the welding of main muscle qualified after colligation stirrup again；
S43：For preventing the blocked up cracking of plain concrete, at change absolute altitude, longitudinally set Ф 4@150 along beam bottom steel corbel strengthen
Reinforcing bar, forms bar-mat reinforcement together with beam stirrup；
S44：Welding uses CO2 gas shielded arc welding, and weld seam form is welding by both sides 8d, and d is bar diameter；
S5：Concreting and maintenance.
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| CN107237250A (en) * | 2017-07-24 | 2017-10-10 | 中交二航局南方工程有限公司 | flexible hinge device of arch bridge and arch bridge |
| CN108457422A (en) * | 2018-02-01 | 2018-08-28 | 东南大学 | Precast prestressed beam, assembled composite frame structure and its installation method |
| CN110206141A (en) * | 2019-04-23 | 2019-09-06 | 江苏省建筑设计研究院有限公司 | The staggered joint of rectangular steel-tube concrete column and beams of concrete |
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| CN108457422A (en) * | 2018-02-01 | 2018-08-28 | 东南大学 | Precast prestressed beam, assembled composite frame structure and its installation method |
| CN110206141A (en) * | 2019-04-23 | 2019-09-06 | 江苏省建筑设计研究院有限公司 | The staggered joint of rectangular steel-tube concrete column and beams of concrete |
| CN111255065B (en) * | 2020-01-21 | 2021-05-14 | 安徽建筑大学 | Connection node of assembled beam column of pre-buried connecting element |
| CN111255065A (en) * | 2020-01-21 | 2020-06-09 | 安徽建筑大学 | Connection node of assembled beam column of pre-buried connecting element |
| CN111173148A (en) * | 2020-03-19 | 2020-05-19 | 河南工业大学 | Connecting joint of steel reinforced concrete beam and steel pipe concrete column |
| CN113863513A (en) * | 2021-10-26 | 2021-12-31 | 杭萧钢构(广东)有限公司 | Construction method of circular pipe column reinforcing ring |
| CN113898070A (en) * | 2021-11-19 | 2022-01-07 | 成都建工第八建筑工程有限公司 | Mechanical connecting structure and method for steel bars at bottom of section steel beam |
| CN113898070B (en) * | 2021-11-19 | 2023-10-27 | 成都建工第八建筑工程有限公司 | Mechanical connection structure and method for steel bars at bottom of profile steel beam |
| CN115434536A (en) * | 2022-09-29 | 2022-12-06 | 江苏省江南建筑技术发展有限公司 | Node external member for additionally arranging concrete interlayer in tall space and construction method |
| CN115680115A (en) * | 2022-11-09 | 2023-02-03 | 北京工业大学 | Conversion node of concrete combined column and construction method |
| CN115680115B (en) * | 2022-11-09 | 2024-07-02 | 北京工业大学 | Conversion node of concrete composite column and construction method |
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