CN109281437A - L tee section acra outsourcing channel steel concrete combined special-shaped column and its construction method - Google Patents
L tee section acra outsourcing channel steel concrete combined special-shaped column and its construction method Download PDFInfo
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- CN109281437A CN109281437A CN201811128405.8A CN201811128405A CN109281437A CN 109281437 A CN109281437 A CN 109281437A CN 201811128405 A CN201811128405 A CN 201811128405A CN 109281437 A CN109281437 A CN 109281437A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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Abstract
The invention discloses a kind of L tee section acra outsourcing channel steel concrete combined special-shaped column and construction methods, belong to building field, including pedestal and the L shape Special-Shaped Column being vertically mounted on pedestal.L shape Special-Shaped Column forms two acras, two acras are respectively disposed with flute profile fashioned iron, flute profile fashioned iron covers outside two acras, the recess of flute profile fashioned iron is towards L shape Special-Shaped Column center, flute profile fashioned iron hollow back is to exposing to outside two acras of L shape Special-Shaped Column, L shape Special-Shaped Column corner is provided with angle steel, and angle steel covers outside L shape Special-Shaped Column corner, and the recess of angle steel is towards L shape Special-Shaped Column turning point.Its construction method includes: assembling reinforcement bone → be assembled into combination L shape steel skeleton → erection template → moulding by casting.The present invention effectively solves the problems, such as that the steel skeleton of steel reinforced concrete special-shaped columns is more complex and causes construction inconvenient, saves construction time and cost；Steel concrete deformed pile structure anti-seismic performance is effectively improved, steel concrete deformed pile structure bearing capacity is effectively improved.
Description
Technical field
The present invention relates to a kind of building engineering field, especially a kind of L tee section acra outsourcing channel steel concrete combination is different
Shape column and its construction method.
Background technique
Special-Shaped Column refers to that column section is L shape, T shape, cross, and the ratio between section height and limb thickness are less than or equal to 4 column.It is different
The limb thickness of shape column is usually consistent with wall thickness, avoids pillar protrusion wall so that building interior is both beautiful, while also between
It connects and increases the use space in room, therefore, Special-Shaped Column, using irreplaceable superiority is possessed in function, is held very much in building
Vulnerable to the popular welcome of user and developer, thus it is used widely in practical projects.
But due to the scrambling of existing special-shaped column section, stress is unreasonable, and limb thickness is smaller, makes it in geological process
Under first acra foot destroy, and then cause pillar integrally destroy quickly, anti-seismic performance is generally not so good as rectangular section column.
In order to optimize special-shaped column structure performance further, expand application range, many scholars have carried out a large amount of examination
It tests and theoretical research, proposes some new structure types and construction method, such as steel reinforced concrete special-shaped columns, steel tube concrete
Native Special-Shaped Column etc.；Although these new structure situations can solve the problems, such as that Special-Shaped Column anti-seismic performance is insufficient to a certain extent,
The problem for also bringing construction space deficiency simultaneously, the general only house fashioned iron of 200mm or steel pipe concrete profiled thick to limb
Rod structure, should have fashioned iron or steel pipe to pass through at node, have the longitudinal reinforcement of beam column to cross through again, be to be difficult to imagine
It is crowded, or even be difficult to implement in practical projects.
The defect of production Special-Shaped Column and its construction method commonly used in the prior art is:
(1) reinforcing bar is bound at L-shaped or other shapes by the shape of Special-Shaped Column by ordinary reinforced concrete Special-Shaped Column, fixed
In design position, then there is reinforcing bar to pass through in concrete, concreting is more convenient, since limb thickness is relatively thin, one when destruction
As be crushed first in the concrete of acra, bearing capacity is lower, cannot be using being higher than 12 layers of building, poor seismic behavior, Bu Nengyong
In higher than 8 degree of earthquake territories.
(2) steel reinforced concrete special-shaped columns, i.e., in the embedding fashioned iron of inside concrete, such form structure is complex, in addition
Special-Shaped Column inner space folder is small, especially more crowded inside the node location of beam column junction, brings difficulty to construction, applies
Working hour cross-sectional internal fashioned iron hinders the vibration compacting of concrete, and in the embedding fashioned iron of inside concrete, concrete wraps up fashioned iron week
It enclosing, fashioned iron is not exposed, there is abdomen formula and an open web type, and fashioned iron not connectors such as weld stud, bearing capacity is larger, good seismic performance,
But since inside has fashioned iron to pass through again, it obstructs the binding of reinforcing bar wears the reinforcing bar for hindering beam in the fashioned iron of beam column infall column
It crosses.When section is smaller, it is likely to result in the disadvantage of thickness of concrete cover deficiency, simultaneously as the section of Special-Shaped Column
Complexity, corresponding steel skeleton also interfere the insertion of vibration island device, and the vibration island for being unfavorable for concrete is closely knit, is unfavorable for construction quality
Guarantee.
(3) steel pipe concrete profiled pile is disposed with steel pipe in shaped rc columns, interior fill concrete, between steel pipe
It is connected with component, working procedure is more, and difficulty is big, and anti-seismic performance is good, and bearing capacity is high, and hindering for steel pipe makes beam column infall steel
Muscle is not easy across taking complicated measure.It is generally unsuitable for the lesser special-shaped column structure of house cross-section, is only applicable to
Large scale special-shaped column.
Patent No. 201721687444.2, the earlier application of entitled steel pipe concrete profiled pile, main technical point
It is muti-piece reinforcement welding in periphery, although solving the advantage of traditional Special-Shaped Column anti-seismic performance deficiency to a certain extent, its
There is also shortcomings, the Special-Shaped Column of mainly pure encased steel plate is in actual use process and work progress by very big limit
System, firstly, secondly, leak be easy to cause steel plate to get rusty, appearance is influenced by large area using being not easy to plaster in house；Most
Afterwards, the steel plate of outsourcing needs plurality of steel plates to carry out welding fabrication, and the very complicated complexity of workload mentions significantly in practical applications
High construction cost；Patent No. 201611266329.8, patent name are the first Shen of L shape aluminium alloy concrete profiled pile
Please, technical point is also metal outsourcing, and other than disadvantage mentioned above, the outer surface in this application is not in same plane
It is interior, it also needs in addition to plaster for groove in practice of construction process, further increases work difficulty.
For disadvantage of the existing technology, the present invention provides a kind of technical ability and improves special-shaped column structure performance to be conducive to again
The new structure type and method of construction, it is intended that solve defect of the existing technology.
Summary of the invention
The invention discloses a kind of L tee section acra outsourcing channel steel concrete combined special-shaped column and its construction method, applications
Channel steel is wrapped on the outside of Special-Shaped Column acra by steel-concrete combined structure Special-Shaped Column, and channel steel and concrete pass through nail solder fitting
Be connected, will not because channel steel is embedded in inside concrete cause crowded inside concrete reinforcing bar, insufficient space the problems such as；To realize
Above-mentioned purpose, the technical solution of the present invention is as follows:
A kind of L tee section acra outsourcing channel steel concrete combined special-shaped column, the L tee section acra outsourcing channel steel coagulation
Native combined special-shaped column includes pedestal and the L shape Special-Shaped Column being vertically mounted on pedestal；It is characterized by:
The angle of two acras of the L shape Special-Shaped Column formation, the acra and acra is 90 °, the length of described two acras
Degree is all the same with width, and described two acras are respectively disposed with flute profile fashioned iron, and the flute profile fashioned iron covers outside two acras, institute
The recess of flute profile fashioned iron is stated towards L shape Special-Shaped Column center, the flute profile fashioned iron hollow back is to exposing to two acras of L shape Special-Shaped Column
Outside, the L shape Special-Shaped Column corner is provided with angle steel, and the angle steel covers outside L shape Special-Shaped Column corner, the recess of the angle steel
Towards L shape Special-Shaped Column turning point；
The flute profile fashioned iron width is identical as the L shape Special-Shaped Column concrete acra.
Preferably, flute profile fashioned iron concave surface is welded with several Welded-Stud Conectors, the Welded-Stud Conectors and flute profile type
Steel vertical welding, the Welded-Stud Conectors are embedded in the concrete, and the Welded-Stud Conectors include integrally formed connecting rod
With the peg head in connecting rod one end, described connecting rod one end is vertically welded in the recess of flute profile fashioned iron, the other end and peg
Connection, the vertical section of the peg are bigger than the vertical section of connecting rod.
Preferably, the L shape Special-Shaped Column is made of default bar construction and mixed mud, and the default bar construction includes
The L u stirrup of longitudinal reinforcement and transverse direction, the Welded-Stud Conectors and L u stirrup lateral alternate, not in the same plane, the L
U stirrup is formed by two rectangle hoop stacked groups.
Preferably, the pedestal is L-shaped structure, and the pedestal section is greater than L shape Special-Shaped Column upright projection section；
Multiple preformed holes are provided on the pedestal, the positioning for longitudinal reinforcement.
Preferably, the L shape Special-Shaped Column is divided into upper and lower part lateral tie encrypted area, the flute profile fashioned iron of the outsourcing
The adjacent spacing between any two of Welded-Stud Conectors that lower part is located at L shape Special-Shaped Column encrypted area is less than top Welded-Stud Conectors adjacent two
Spacing between two.
Preferably, the connection pole length is 8-15cm, and the peg is provided in round ferrule or right-angled intersection connects
The steel bar piece connect.
The construction method of the L tee section acra outsourcing channel steel concrete combined special-shaped column,
The following steps are included:
(1) assembling reinforcement bone:
It is bent into several rectangle hoops after being segmented stirrup by design requirement, and interlocks in order at stacked group L shape two-by-two
It is inserted on the longitudinal reinforcement arranged in advance；
Then several vertical reinforcements and several transversally L-shaped stirrups of circle are bound at L-shaped reinforcement cage skeleton；
(2) flute profile fashioned iron, Welded-Stud Conectors, angle steel and production pedestal are customized；
(3) flute profile fashioned iron and Welded-Stud Conectors weld: by Welded-Stud Conectors vertical welding in flute profile fashioned iron concave surface center；
(4) pedestal, flute profile fashioned iron, angle steel are assembled into reinforcement cage skeleton combine L shape steel skeleton and by flute profile fashioned iron and
Angle steel vertical welding is on pedestal；
(5) concrete blinding is set up by the requirement of L shape Special-Shaped Column；
(6) it is poured concrete formation, template is removed after maintenance and is become as the combination of L tee section acra outsourcing channel steel concrete
Special-Shaped Column.
Preferably, the pedestal production in the step (2), the pedestal are designed as L shape, and the pedestal L tee section is greater than
The L shape abnormity column section；The base upper surface is preset with multiple preformed holes for positioning longitudinal reinforcement.
Preferably, the Welded-Stud Conectors in the step (3) and flute profile fashioned iron weld, and when welding presses L shape Special-Shaped Column lower part
Mutual spacing is less than the spacing welding of top Welded-Stud Conectors between any two to the Welded-Stud Conectors of encrypted area two-by-two.
Preferably, the erection template in the step (5) is the slot between the adjacent flute profile section steel edge on L shape steel skeleton
Rectangle template is installed, i.e. rectangle template and two flute profile fashioned iron and angle steel surrounds L jointly between shape fashioned iron and angle steel
Shape periphery, between the rectangle template and template, angle steel and rectangle template are connected and fixed with iron wire.
Related description of the invention, channel steel and concrete profiled pile or beam bottom portion by Shear connection key connection combine by
Power, this structure and steel reinforced concrete special-shaped columns have apparent difference in appearance in form, and fashioned iron is only arranged in column acra, and
It is not obviously to be divided into steel construction and concrete structure on section in Transducers Embedded in Concrete, and there is no steel reinforced concrete special-shaped columns knot
Structure is such to lead to the crowded brought constructional difficulties problem in space due to internal embedding fashioned iron, meanwhile, fashioned iron is arranged in different
The acra of shape column can reinforce the stress of acra well, so that it will not as shaped rc columns under geological process
It is destroyed first in outlimb.This programme effectively increases bearing capacity and anti-seismic performance compared with armored concrete；It is mixed with fashioned iron
Solidifying soil is compared, and solves the problem of crowded inside the node location of beam column junction, constructional difficulties.
The invention has the benefit that
(1) Special-Shaped Column of the present invention is that channel steel is wrapped in Special-Shaped Column acra by steel-concrete combined structure Special-Shaped Column
Outside, channel steel are connected with concrete by Welded-Stud Conectors, will not cause inside concrete because channel steel is embedded in inside concrete
The problem of reinforcing bar is crowded, insufficient space；Channel steel be in concrete outside simultaneously, will not interfere passing through for reinforcing bar at bean column node；
(2) for Special-Shaped Column of the present invention convenient for construction, the steel skeleton for effectively solving steel reinforced concrete special-shaped columns is more complex
And the problem for causing construction inconvenient, save construction time and cost；Effectively improve steel concrete deformed pile structure shock resistance
Can, effectively improve steel concrete deformed pile structure bearing capacity；SCC L shape column negative peak load is compared with RC under identical axial compression ratio
L shape column improves 1.35-1.55 times.
(3) Special-Shaped Column of the invention energy consumption and ductility are obviously improved compared with normal concrete Special-Shaped Column, the consumption of SCC L shape column
Energy ability is compared with RC L shape column, there is raising by a relatively large margin, and the hysteresis loop later period of SCC L shape column is in full shuttle shape,
It is fuller compared to RC L shape column；Equivalent viscous when the displacement load of SCC-L afterbody is 0.308-0.348, and
RC-L only has 0.164-0.204, and the equivalent viscous of SCC-L improves 70.6%-87.8%, SCC-L in contrast
The positive function ratio index of afterbody displacement load is 12.46-14.46, and RC-L only has 6.45-8.45, in contrast SCC-
The positive function ratio index of L improves 71.1%-93.1%, and comprehensive hysteresis loop, equivalent viscous and function ratio index come
It sees, the energy dissipation capacity of SCC L shape column has raising by a relatively large margin.
(4) Special-Shaped Column working procedure of the present invention is relatively simple, the reinforcing bar of reinforcing bar binding and ordinary reinforced concrete Special-Shaped Column
Binding difficulty is identical, and outsourcing channel steel can be pre-fabricated, assembled at the scene；And it is hindered in beam column infall without extra Steel material
Hinder, there is no reinforcing bar be not easy across the problem of.
(5) it is respectively arranged flute profile fashioned iron in two acras of the concrete profiled pile of L tee section, the recess direction of channel steel is mixed
Solidifying soil acra, covers on acra, and channel steel hollow back is to exposing to outside concrete；Good appearance, compared with ordinary reinforced concrete column
Firmer, acra has channel steel protection, and anti-seismic performance is greatly improved.
(6) Special-Shaped Column of the invention significantly improves compared with the ductility factor of common Special-Shaped Column, improves 26.5%-
30.5%, positive initial stiffness improves 64.7%-68.7%, and negative sense strength deterioration is slightly slow, positive negative sense Stiffness Deterioration compared with
Fastly, ductility factor slightly improves.
Detailed description of the invention
Fig. 1 is flute profile fashioned iron schematic diagram；
Fig. 2 is the Special-Shaped Column fractionation structural representation of present invention casting concrete；
Fig. 3 is construction method flowage structure schematic diagram of the present invention；
Fig. 4 is construction process figure of the present invention.
Figure label, 100- flute profile fashioned iron, 200- Welded-Stud Conectors, 201- connecting rod, 202- peg, 300-L shape hoop
Muscle, 301- rectangle hoop, 400- longitudinal reinforcement, 500- pedestal, 600- angle steel, 700- template, 800- mixed mud.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, referring to the drawings and preferred reality is enumerated
Example is applied, the present invention is described in more detail.However, it is necessary to illustrate, many details listed in specification are only to be
Reader is set to have a thorough explanation to one or more aspects of the present invention, it even without these specific details can also
To realize the aspects of the invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", water
It is flat " etc. the orientation or positional relationships of instructions be to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of describing this hair
Bright and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation "
Equal terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be with
It is to be bolted, is also possible to be welded to connect；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
Below in conjunction with attached drawing, invention is further described in detail, but not as a limitation of the invention.
In conjunction with shown in Fig. 1-Fig. 4,
A kind of L tee section acra outsourcing channel steel concrete combined special-shaped column, the L tee section acra outsourcing channel steel coagulation
Native combined special-shaped column includes pedestal 500 and the L shape Special-Shaped Column being vertically mounted on pedestal, and pedestal 500 is different for fixing L shape
The flute profile fashioned iron 100 of preset reinforcing bar and peripheral hardware in shape column.
The angle of two acras of the L shape Special-Shaped Column formation, the acra and acra is 90 °, the length of described two acras
Degree is all the same with width, and described two acras are respectively disposed with flute profile fashioned iron 100, and 100 sets of the flute profile fashioned iron in two acras
Outside, for the recess of the flute profile fashioned iron 100 towards L shape Special-Shaped Column center, 100 hollow back of flute profile fashioned iron is special-shaped to L shape is exposed to
Outside two acras of column, the L shape Special-Shaped Column corner is provided with angle steel 600, and 600 sets of the angle steel in L shape Special-Shaped Column corner
Outside, the recess of the angle steel 600 is towards L shape Special-Shaped Column turning point；
100 width of flute profile fashioned iron is identical as the L shape Special-Shaped Column concrete acra.
By being provided with flute profile fashioned iron 100 and angle steel 600 outside L shape Special-Shaped Column, convenient for construction, it is mixed effectively to solve fashioned iron
The problem that the steel skeleton of solidifying soil Special-Shaped Column is more complex and causes construction inconvenient, saves construction time and cost.Effectively improve reinforcing bar
Concrete profiled pile structural seismic performance effectively improves steel concrete deformed pile structure bearing capacity.
Preferably, 100 concave surface of flute profile fashioned iron is welded with several Welded-Stud Conectors 200, the Welded-Stud Conectors
200 are embedded in the concrete with 100 vertical welding of flute profile fashioned iron, the Welded-Stud Conectors 200, the Welded-Stud Conectors 200
Including integrally formed connecting rod 201 and in the peg head 202 of connecting rod one end, described 201 one end of connecting rod is vertically welded in
In the recess of flute profile fashioned iron 100, the other end is connect with peg 202, and the vertical section of the peg 202 is more perpendicular than connecting rod 201
Straightforward face is big.Peg head uses and is arranged the cohesive force increased with concrete, so that Special-Shaped Column overall structure is more firm.
By the way that peg 202 is arranged, it is embedded in mixed mud, has the function of good pulling force to flute profile fashioned iron 100, prevent
Only in vibration, flute profile fashioned iron 100 is loosened with L shape Special-Shaped Column, does not achieve the effect that shockproof, and peg 202 plays inside
The effect of lateral pull.It is arranged in a staggered manner that avoid interior construction crowded and increase the integrally-built cohesive force of Special-Shaped Column.
Preferably, the L shape Special-Shaped Column is made of default bar construction and mixed mud, and the default bar construction includes
The L u stirrup 300 of longitudinal reinforcement 400 and transverse direction, the Welded-Stud Conectors 200 and 300 lateral alternate of L u stirrup, not same
In plane, the L u stirrup 300 is formed by two 301 stacked groups of rectangle hoop, and stacked group is the wide end of a rectangle hoop 301
Side becomes with the long end of another rectangle hoop 301 to be overlapped, and the angle at the angle of rectangle hoop 301 and another rectangle hoop 301
It is overlapped the dog-ear for constituting L u stirrup 300.By Welded-Stud Conectors 200 and 300 lateral alternate of L u stirrup, so as to prevent
Only reduce influence of the flute profile fashioned iron 100 to default bar construction, including get rusty or earthquake in interfere with each other.This setting is
Since special-shaped column bottom bearing capacity in practical applications is greater than top, therefore this Special-Shaped Column is according to being actually also equipped with reinforced region,
Protect the stability of whole pillar entirety.
Preferably, the pedestal 500 is L-shaped structure, and 500 section of pedestal is greater than the L shape Special-Shaped Column upright projection
Section；Multiple preformed holes are provided on the pedestal, the positioning for longitudinal reinforcement 400.
Preferably, the L shape Special-Shaped Column is divided into upper and lower part lateral tie encrypted area, the flute profile fashioned iron of the outsourcing
The adjacent spacing between any two of Welded-Stud Conectors 200 that 100 lower parts are located at L shape Special-Shaped Column encrypted area is less than top Welded-Stud Conectors
200 adjacent spacing between any two.
Preferably, 201 length of connecting rod is 8-15cm, and the peg 202 is provided in round ferrule or cross
The steel bar piece of interconnection.The peg head is provided in round the steel bar piece of ferrule or right-angled intersection connection, the shape
For preferred embodiment shape, but the guarantor to other shapes such as triangle or taper and other shapes being more suitable for is not interfered
Shield.
The construction method of L tee section acra outsourcing channel steel concrete combined special-shaped column,
The following steps are included:
(1) assembling reinforcement bone:
It is bent into several rectangle hoops 301 after being segmented stirrup by design requirement, and is staggeredly pressed at stacked group L shape two-by-two
Sequence is inserted on the longitudinal reinforcement arranged in advance.Stacked group is the wide distal edge and another rectangle hoop of a rectangle hoop 301
The long end of muscle 301, which becomes, to be overlapped, and the angle of rectangle hoop 301 is overlapped with the angle of another rectangle hoop 301 and constitutes L u stirrup
300 dog-ear.
Then several vertical reinforcements 400 and several transversally L-shaped stirrups 300 of circle are bound at L-shaped reinforcement cage skeleton；
(2) flute profile fashioned iron 100, Welded-Stud Conectors 200, angle steel 600 and production pedestal 500 are customized, according to corresponding ruler
The welding of little progress row is directly formed in factory, and relative dimensions are determined to according to relevant setting drawing.
(3) flute profile fashioned iron 100 and Welded-Stud Conectors 200 weld: by 200 vertical welding of Welded-Stud Conectors in flute profile fashioned iron
Concave surface center；Welded-Stud Conectors 200 are arranged on same straight line.
(4) pedestal 500, flute profile fashioned iron 100, angle steel 600 are assembled into reinforcement cage skeleton and combine L shape steel skeleton and incites somebody to action
Flute profile fashioned iron 100 and 600 vertical welding of angle steel are on pedestal.
(5) concrete blinding 700 is set up by the requirement of L shape Special-Shaped Column, template 700 is traditionally arranged to be rectangular configuration, template
700 are made of mould material or metal, for fixing mixed mud molding.
(6) concrete eight 00 being poured forms, and template is removed after maintenance and is become as L tee section acra outsourcing channel steel concrete
Combined special-shaped column.
Preferably, the pedestal production in the step (2), the pedestal 500 are designed as L shape, the L shape of the pedestal 500
Section is greater than the L shape abnormity column section；500 upper surface of pedestal is preset with multiple preformed holes for positioning longitudinal reinforcement
400。
Welded-Stud Conectors 200 in the step (3) and groove profile fashioned iron 100 weld, and when welding presses L shape Special-Shaped Column lower part
Mutual spacing is less than the spacing welding of top Welded-Stud Conectors 200 between any two to the Welded-Stud Conectors of encrypted area two-by-two.
Erection template 700 in the step (5) is the slot between adjacent 100 side of flute profile fashioned iron on L shape steel skeleton
Rectangle template 700, i.e. rectangle template 700 and two flute profile fashioned iron 100 are installed between shape fashioned iron 100 and angle steel 600
At L-shaped periphery is enclosed jointly with angle steel 600, between the rectangle template 700 and template 700, angle steel 600 and rectangle template
700 are connected and fixed with iron wire.
1 cross section special-shaped column of L-shaped Reinforced Concrete (hereinafter referred to as RC L shape column), 3 cast-types have been made by experiment
L tee section acra outsourcing steel reinforced concrete combined special-shaped column (hereinafter referred to as SCC L shape column) and 2 assembled L tee section acras
Outsourcing steel reinforced concrete combined special-shaped column (hereinafter referred to as PSCC L shape column), and carry out Low-cycle Test, comparative analysis
The anti-seismic performances index such as its loading process, damage -form, ductility factor, energy dissipation capacity.Demonstrating SCC L shape column can be obvious
The anti-seismic performance for improving RC L shape column, can be with promotion and application.And axial compression ratio, steel ratio are analyzed to SCC L shape column shock resistance
Can influence, the investigative research anti-seismic performance of PSCC L shape column demonstrates that develop SCC L shape column can for assembled column
Row, for it, further research provides reference.
(1), the destruction of RC L shape column is that web end post base concrete is crushed peeling, and bearing capacity declines rapidly, test specimen
It destroys and has certain brittleness, the destruction of SCC L shape column also begins with web column base concrete, but the presence of channel steel is to concrete
Have certain effect of contraction, the destruction of concrete shows as initial stage surface and is crushed peeling, and little particle collapses out, then slowly by
It crushes outward bulge, peel off, after part concrete exits work, fashioned iron undertakes bigger axial force, finally by under lateral deflection bearing capacity
Drop, it can be seen that for SCC L shape column due to there is the presence of fashioned iron, the extent of the destruction of web is lighter, advantageous to the antidetonation of structure.
(2), the bearing capacity of SCC L shape column is greatly improved compared with RC L shape column, the positive negative sense average peak of SCC-L1
Value load improves 1.35-1.55 times compared with RC-L1, it can be seen that composite structure can give full play to the excellent of concrete and fashioned iron
Gesture, hence it is evident that improve the bearing capacity of RC L shape column, the strength deterioration curve of SCC L shape column is gentle compared with RC L shape column, SCC L
Shape column has preferable Seismic Bearing Capacity.
(3), the energy dissipation capacity of SCC L shape column is compared with RC L shape column, there is raising by a relatively large margin, SCC L shape column
The hysteresis loop later period is in full shuttle shape, fuller compared to RC L shape column；It is equivalent viscous when the displacement load of SCC-L1 afterbody
Stagnant damped coefficient is 0.308-0.348, and RC-L only has 0.164-0.204, in contrast the equivalent viscous damping system of SCC-L
Number improves 70.6%-87.8%, and the positive function ratio index of SCC-L afterbody displacement load is 12.46-14.46, and RC-
L only has 6.45-8.45, and the positive function ratio index of SCC-L improves 71.1%-93.1% in contrast, comprehensive hysteresis loop,
From the point of view of equivalent viscous and function ratio index, the energy dissipation capacity of SCC L shape column has raising by a relatively large margin.
(4), the ductility factor of SCC L shape column is significantly improved compared to RC L shape column, and the positive ductility factor of RC-L1 only has
2.66-3.06, and the positive ductility factor of SCC-L1 has 3.47-3.87, improves 26.5%-30.5%, illustrates SCC L shape
Column has the presence of fashioned iron, hence it is evident that improves the ductility of RC L shape column, has preferable anti-seismic performance.
(5), the axial compression ratio for increasing test specimen, can aggravate the extent of the destruction on the test specimen edge of a wing, accelerate the damage accumulation of test specimen, break
It is bad suddenly, the ductility factor decline of test specimen, bearing capacity and stiffness is degenerated very fast, and the especially bearing capacity and stiffness of negative sense moves back
Change and accelerate, but increase axial compression ratio, the hysteresis loop of test specimen is more fuller, and equivalent viscous increases, function ratio index
Overall reduction illustrates that the energy consumption for increasing the single loop of axial compression ratio test specimen increases, but it is poor to accumulate energy dissipation capacity.
(6), the steel ratio for increasing test specimen, can mitigate the damage on the edge of a wing, and test specimen failure stage will not be crushed suddenly,
Weakened web cracking is more, occurs Draw shrinkage among hysteresis loop, and equivalent viscous reduces, and function ratio index is total
Body improves, and illustrates the single loop energy dissipation capacity decline of the big test specimen of steel ratio, and accumulation energy dissipation capacity is preferable.Steel ratio is big
Specimen stiffness and bearing capacity significantly improve, and the positive peak load of SCC-L3 improves 27.6%-29.6% compared with SCC-L2, just
64.7%-68.7% is improved compared with SCC-L2 to initial stiffness, negative sense strength deterioration is slightly slow, and positive negative sense Stiffness Deterioration is very fast,
Ductility factor slightly improves.
(7), the damage -form, skeleton curve and every anti-seismic performance index of PSCC L shape column and SCC L shape column are compared
It was found that the two is almost the same, such as in terms of bearing capacity, positive peak load test specimen PSCC-L1 is 2.97%- bigger than test specimen SCC-L2
3.37%, negative peak load test specimen PSCC-L1 is 7.43%-7.83% smaller than test specimen SCC-L2, in terms of ductility factor, test specimen
The positive ductility factor of PSCC-L1 is 3.01-3.11, and the positive ductility factor of test specimen SCC-L2 is 3.27-3.37, the two phase
Poor 8.36%-8.63%, illustrate PSCC L shape column bearing capacity and anti-seismic performance and SCC L shape column it is almost the same, by L shape cut
It is feasible that acra outsourcing steel reinforced concrete combined special-shaped column development in face, which is assembled column,.
(8), by the strain analysis of test specimen, show that RC L shape column meets plane cross-section assumption, SCC L shape column is approximate
Meet plane cross-section assumption.SCC L shape column when the second level is displaced and loads, largely carry out by test specimen crack, and there are one for reinforcing bar strain
Mutation, when the third level is displaced and loads, web concrete starts crushing and peels off, and the strain of web steel column bottom is uprushed, last several
The crushing of circulating column base concrete is peeled off, and fashioned iron assumes responsibility for more axial forces, and the strain at web steel column bottom is always that pressure is answered
Become.The general morphologictrend of peg strain are as follows: cut compressive strain and constantly reduce, develop to stretching strain direction is cut, it is continuous to cut stretching strain
Increase.
(9), fashioned iron, peg and armored concrete can preferably co-ordination, fashioned iron and reinforcing bars before crushing of concrete
Sliding between concrete is smaller, and after crushing of concrete, fashioned iron bears bigger axial force, fashioned iron and armored concrete it
Between sliding increase, peg is still in working condition, there is certain anchorage effect to fashioned iron, and for last fashioned iron by lateral deflection, test specimen is broken
It is bad.
It is composed using channel steel and L shape steel concrete deformed pile structure；Member section is L shape；L is wrapped in outside channel steel
Two acras of shape concrete profiled pile, L shape steel are wrapped in outside on the outside of L shape concrete profiled pile turning；Lead between concrete and channel steel
Cross peg connection；The recess of channel steel covers on acra towards concrete acra, and channel steel hollow back is to exposing to outside concrete；Channel steel
Width is identical as concrete acra；Channel steel and pedestal pass through welded connecting.Made by features described above it is easy for construction, can be effective
The inner space for solving steel reinforced concrete Special-Shaped Column is narrow, the more complex problem for causing construction inconvenient of steel skeleton；Effectively improve steel
The anti-seismic performance of reinforced concrete Special-Shaped Column；Effectively improve the bearing capacity of shaped rc columns；Convenient for developing into assembled
Structure.
This motion is wrapped in L shape shaped rc columns acra, channel steel width and concrete acra using flute profile fashioned iron outside
It is identical, effectively solve fashioned iron and pass through inside concrete profiled pile, bring construction space is insufficient, and caused by reinforcing bar binding it is tired
Difficulty, inconvenient problem of constructing.Channel steel in combined steel and concrete column can undertake a part of construction loads, when can be used as construction
Segment template accelerates speed of application.Slot is just outer to be wrapped in acra, avoids destroying in outlimb first under geological process, effectively mention
The bearing capacity of high shaped rc columns effectively improves the anti-seismic performance of shaped rc columns.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of L tee section acra outsourcing channel steel concrete combined special-shaped column, the L tee section acra outsourcing channel steel concrete group
Closing Special-Shaped Column includes pedestal and the L shape Special-Shaped Column being vertically mounted on pedestal；It is characterized by:
The L shape Special-Shaped Column forms two acras, and the angle of the acra and acra is 90 °, the length of described two acras with
Width is all the same, and described two acras are respectively disposed with flute profile fashioned iron, and the flute profile fashioned iron covers outside two acras, the flute profile
The recess of fashioned iron is towards L shape Special-Shaped Column center, and the flute profile fashioned iron hollow back is to exposing to outside two acras of L shape Special-Shaped Column, the L
Shape Special-Shaped Column corner is provided with angle steel, and the angle steel covers outside L shape Special-Shaped Column corner, and the recess of the angle steel is different towards L shape
Shape column turning point；
The flute profile fashioned iron width is identical as the L shape Special-Shaped Column concrete acra.
2. L tee section acra outsourcing channel steel concrete combined special-shaped column according to claim 1, it is characterised in that:
Flute profile fashioned iron concave surface is welded with several Welded-Stud Conectors, the Welded-Stud Conectors and flute profile fashioned iron vertical welding,
The Welded-Stud Conectors are embedded in the concrete, and the Welded-Stud Conectors include integrally formed connecting rod and in connecting rod one
The peg head at end, described connecting rod one end are vertically welded in the recess of flute profile fashioned iron, and the other end is connect with peg, the peg
Vertical section it is bigger than the vertical section of connecting rod.
3. L tee section acra outsourcing channel steel concrete combined special-shaped column according to claim 2, it is characterised in that:
The L shape Special-Shaped Column is made of default bar construction and mixed mud, and the default bar construction includes longitudinal reinforcement and cross
To L u stirrup, the Welded-Stud Conectors and L u stirrup lateral alternate, not in the same plane, the L u stirrup is by two
Rectangle hoop stacked group forms.
4. L tee section acra outsourcing channel steel concrete combined special-shaped column according to claim 1, it is characterised in that:
The pedestal is L-shaped structure, and the pedestal section is greater than L shape Special-Shaped Column upright projection section；It is set on the pedestal
Multiple preformed holes are equipped with, the positioning for longitudinal reinforcement.
5. L tee section acra outsourcing channel steel concrete combined special-shaped column according to claim 1, it is characterised in that:
The L shape Special-Shaped Column is divided into upper and lower part lateral tie encrypted area, and it is different that the flute profile fashioned iron lower part of the outsourcing is located at L shape
The adjacent spacing between any two of the Welded-Stud Conectors of shape column encrypted area is less than the adjacent spacing between any two of top Welded-Stud Conectors.
6. L tee section acra outsourcing channel steel concrete combined special-shaped column according to claim 5, it is characterised in that:
The connection pole length is 8-15cm, and the peg is provided in round the steel bar piece of ferrule or right-angled intersection connection.
7. the construction party of L tee section acra outsourcing channel steel concrete combined special-shaped column according to claim 1-6
Method, it is characterised in that:
The following steps are included:
(1) assembling reinforcement bone:
It is bent into several rectangle hoops after being segmented stirrup by design requirement, and is staggeredly inserted in order at stacked group L shape two-by-two
On the longitudinal reinforcement arranged in advance；
Then several vertical reinforcements and several transversally L-shaped stirrups of circle are bound at L-shaped reinforcement cage skeleton；
(2) flute profile fashioned iron, Welded-Stud Conectors, angle steel and production pedestal are customized；
(3) flute profile fashioned iron and Welded-Stud Conectors weld: by Welded-Stud Conectors vertical welding in flute profile fashioned iron concave surface center；
(4) pedestal, flute profile fashioned iron, angle steel are assembled into reinforcement cage skeleton and combine L shape steel skeleton and by flute profile fashioned iron and angle steel
Vertical welding is on pedestal；
(5) concrete blinding is set up by the requirement of L shape Special-Shaped Column；
(6) be poured concrete formation, removed after maintenance template become for L tee section acra outsourcing channel steel concrete it is combined special-shaped
Column.
8. the construction method of combined special-shaped column according to claim 7, it is characterised in that:
Pedestal production in the step (2), the pedestal are designed as L shape, and the pedestal L tee section is greater than the L shape abnormity
Column section；The base upper surface is preset with multiple preformed holes for positioning longitudinal reinforcement.
9. the construction method of combined special-shaped column according to claim 7, it is characterised in that:
Welded-Stud Conectors in the step (3) and groove profile fashioned iron weld, by the peg of the shape Special-Shaped Column lower part L encrypted area when welding
Mutual spacing is less than the spacing welding of top Welded-Stud Conectors between any two to connector two-by-two.
10. the construction method of combined special-shaped column according to claim 7, it is characterised in that:
Erection template in the step (5) is flute profile fashioned iron and angle steel between the adjacent flute profile section steel edge on L shape steel skeleton
Between rectangle template is installed, i.e. rectangle template and two flute profile fashioned iron and angle steel enclose at L-shaped periphery, the length jointly
Between square template and template, angle steel and rectangle template are connected and fixed with iron wire.
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