CN106193450A - High-energy-consumption concrete coupling beam with built-in mild steel - Google Patents
High-energy-consumption concrete coupling beam with built-in mild steel Download PDFInfo
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- CN106193450A CN106193450A CN201610802625.9A CN201610802625A CN106193450A CN 106193450 A CN106193450 A CN 106193450A CN 201610802625 A CN201610802625 A CN 201610802625A CN 106193450 A CN106193450 A CN 106193450A
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- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims description 79
- 238000005265 energy consumption Methods 0.000 title abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 54
- 238000013016 damping Methods 0.000 claims abstract description 34
- 239000002986 polymer concrete Substances 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
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- 239000011398 Portland cement Substances 0.000 claims description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a high-energy-consumption concrete connecting beam with built-in soft steel, which comprises stressed longitudinal bars (1), stirrups (3) and constructed longitudinal bars (4), wherein the stressed longitudinal bars (1) arranged in a rectangular shape are fixedly formed by the stirrups (3) at the end parts, soft steel plates (2) are placed in cavities formed by the stirrups (3) at the two end parts, the two ends of each soft steel plate (2) are respectively fixed on the stirrups (3) at the two end parts, the constructed longitudinal bars (4) are arranged between the stressed longitudinal bars (1) and positioned at the front side and the rear side of each soft steel plate (2), and the stirrups (3) at the middle part are also arranged between the stirrups (3) at the two end parts and used for fixing the stressed longitudinal bars (1) and the constructed longitudinal bars (4); the structure is placed in the coupling beam template, and the required coupling beam can be obtained by adopting fiber reinforced high damping polymer concrete for pouring. The shear-resistant bearing capacity, the ductility and the energy consumption capacity of the coupling beam are improved; better integrity can be kept under the action of large displacement and large load, and the rigidity degradation is delayed.
Description
Technical field
The present invention relates to coupling beam technical field, specifically one and improve shear-carrying capacity and ductility and in geological process
Under there is the highly energy-consuming concrete connecting-beam of built-in mild steel of good energy consumption effect.
Background technology
In skyscraper, the shearing that coupling beam shear wall is highly resistant to wind load and earthquake load causes.Make in earthquake
Under with, the coupling beam between wall limb can effective consumed energy, and provide the strongest rigidity for whole shear wall system.Existing respectively
The situation planting coupling beam is as follows: 1) normal concrete coupling beam: ductility is poor, and concrete once enters plasticity, and bearing capacity declines rapidly,
Under big shake, show obvious fragility, under curved scissors effect, be susceptible to failure by shear produce intersection diagonal crack, energy dissipation
Effect is poor；2) diagonal member reinforced concrete coupling beam: the problem that failure by shear easily occurs for reply normal concrete coupling beam, in coupling beam
Internal placement diagonal angle diagonal bar, adds somewhat to shearing strength and the ductility of coupling beam, but anti-bending bearing capacity improves few, and
And difficulty of construction is bigger when concrete connecting-beam width is less；3) diamond pattern arrangement of reinforcement reinforced concrete coupling beams: can be effectively improved little
The ductility of span-depth radio coupling beam, but higher and relatively costly to construction requirement, it is difficult to promote；4) steel reinforced concrete coupling beam: shaped steel
Addition make coupling beam entirety ductility preferable, but rigidity own is relatively big, makes plastic hinge preferential with the wall improper meeting of limb ratio of rigidity
Result from wall limb, be unfavorable for that coupling beam consumes energy on the contrary；5) band straight joint reinforced concrete coupling beams: by increasing span-depth radio, significantly carry
The high ductility of coupling beam, but now the rigidity of coupling beam reduces to original 1/4th, have impact on the globality of Coupled Shear Wall；6)
Self-control connecting beam: set horizontal straight joint by coupling beam two ends, centre utilizes plain concrete to form connecting key.The lower plain concrete of big shake connects
Key ftractures, and forms upper and lower two coupling beams, and increase span-depth radio is to increase ductility, and the method is higher for the required precision of slot, no
It is beneficial to the popularization in Practical Project.
Summary of the invention
The problem that it is an object of the invention to exist for prior art, it is provided that a kind of improve shear-carrying capacity and ductility and
There is under geological process the highly energy-consuming concrete connecting-beam of the built-in mild steel of good energy consumption effect.
It is an object of the invention to solve by the following technical programs:
The highly energy-consuming concrete connecting-beam of a kind of built-in mild steel, indulges muscle, stirrup and structure including stress and indulges muscle, it is characterised in that: become
The stirrup that the stress that rectangle is arranged indulges muscle employing end is fixed-type, and the inside cavity that the stirrup at both ends is constituted places mild steel
Plate, the two ends of mild steel plate are separately fixed on the stirrup at both ends, and the vertical muscle of structure is arranged on stress and indulges between muscle and be positioned at mild steel
Both sides before and after plate, the stirrup being also provided with middle part between the stirrup at both ends indulges muscle and the vertical muscle of structure for fixing stress；Above-mentioned
Structure is placed in coupling beam template employing fiber reinforcement high-damping polymer concrete and pours and can obtain required coupling beam.
Described mild steel plate is positioned at the middle part of coupling beam and the both sides, end of mild steel plate and is welded by the stirrup of spot welding with both ends
It is connected together.
The upper and lower surface of described mild steel plate is welded together by the stirrup of spot welding with middle part.
Described mild steel plate is H-shaped steel plate, and the thickness of mild steel plate is the 1/15-1/10 of coupling beam width, the two ends of mild steel plate
The housing depth highly constituted less than the stirrup at both ends positions to realize spot welding, and the miding level height of mild steel plate is mild steel plate
The 1/3-1/2 of end height.
The middle segment length of described mild steel plate is equal to the net span of coupling beam.
The length of described coupling beam embedment Shear Walls limb takes wall limb thickness and the higher value of deck-molding 1/2.
The material component of described fiber reinforcement high-damping polymer concrete includes: cement, water, flyash, sand, polymer
Additive, fiber and high efficiency water reducing agent, defoamer, dispersant, be cement: water: flyash: sand=1:(0.45 the most in mass ratio
～0.70): (0.50～1.20): (1.00～2.20) select cement, water, flyash, sand, by cement and flyash quality consumption
7～16% choose polymeric additive, choose high efficiency water reducing agent, by water by cement and the 0.8 of flyash quality consumption～1.8%
Mud and the 0.5% of flyash quality consumption～1.2% chooses defoamer, by cement and the 0.15 of flyash quality consumption～0.32%
Choosing dispersant, fiber is PVA fiber, and 0.8%～2.5% by the cumulative volume of water, cement, flyash and sand choose PVA fiber；
Stir after above-mentioned raw materials is configured in proportion and i.e. can get fiber reinforcement high-damping polymer concrete.
Described cement uses 42.5 grades of Portland cements of Carnis Rapanae thomasianae board P.O；Flyash uses I level flyash；Sand is adopted
With the common river sand that modulus of fineness is 1.6～2.2；Hydromining density is 1.0g/cm3, meet " concrete water standard "
(JGJ63-2006) ordinary tap water required；Polymeric additive uses Carboxy emulsion or acrylate copolymer emulsion；Fine
Dimension uses elastic modelling quantity 42Gpa, the PVA fiber of draw ratio 7%；Dispersant uses dodecylbenzene sodium sulfonate；High efficiency water reducing agent is adopted
With the polycarboxylate water-reducer that water-reducing rate is 20～35%；Defoamer uses in tributyl phosphate, polyacrylate, silane copper polyethers
One.
The present invention has the following advantages compared to existing technology:
The coupling beam of the present invention is indulged the stirrup outside muscle and the vertical muscle of structure, vertical muscle by the stress running through prefabricated coupling beam, is built in coupling beam
In mild steel plate as intensive aspect, fiber reinforcement high-damping polymer concrete is as matrix, and this coupling beam is mixed compared to traditional
Solidifying soil coupling beam, owing to have employed fiber reinforcement high-damping polymer concrete as matrix built-in mild steel plate so that coupling beam
Shear-carrying capacity and ductility are improved, and have good energy consumption effect under geological process.
The coupling beam of the present invention uses fiber reinforcement high-damping polymer concrete, and the bridge joint effect of PVA fiber makes
Coupling beam, during bearing load destroys, shows " multiple crack growth " and the feature of " strain hardening ", every fine fisssure
Seam, less than 100um, therefore uses fiber reinforcement high-damping polymer concrete can improve the bearing capacity of coupling beam, alleviates coupling beam
The cracking of concrete peels off.
The coupling beam of the present invention uses mild steel plate to undertake a part of shearing as intensive aspect so that coupling beam failure mode is changed
Kind, more showing as bends failure by shear；Mild steel plate is put into plasticity in the range of small strain simultaneously, plays power consumption earlier and makees
With；The addition of mild steel plate will not make coupling beam rigidity increase substantially, it is to avoid common shaped steel coupling beam shear wall plastic hinge first produces
The shortcoming being born in wall limb.
Mild steel plate in the coupling beam of the present invention can be bonded in the fiber reinforcement high-damping polymer concrete of high ductility
Co-ordination together, alleviates the bond-slip problem between normal concrete and reinforcing bar, improves the deformation of concrete connecting-beam
Ability, thus improve ductility and the energy dissipation capacity of concrete connecting-beam；Under big displacement and big load action, this coupling beam can keep
Preferably globality, shear-carrying capacity is improved simultaneously, and Stiffness Deterioration have also been obtained postponement.
Accompanying drawing explanation
Accompanying drawing 3 is the section B-B structural representation of accompanying drawing 1.
Wherein: 1 stress indulges muscle；2 mild steel plates；3 stirrups；The 4 vertical muscle of structure.
Detailed description of the invention
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
As Figure 1-3: the highly energy-consuming concrete connecting-beam of a kind of built-in mild steel, muscle 1, stirrup 3 and structure are indulged including stress
Vertical muscle 4, it is characterised in that: the stress of rectangular setting is indulged muscle 1 and is used the stirrup 3 of end fixed-type, stirrup 3 structure at both ends
The inside cavity become places mild steel plate 2, and the two ends of mild steel plate 2 are separately fixed on the stirrup 3 at both ends, and the vertical muscle 4 of structure is arranged
Indulge between muscle 1 in stress and be positioned at both sides before and after mild steel plate 2 (from the point of view of two sectional views: the vertical muscle 4 of structure is then positioned at mild steel plate
The left and right sides of 2), the stirrup 3 being also provided with middle part between the stirrup 3 at both ends indulges muscle 1 and the vertical muscle 4 of structure for fixing stress；
Said structure is placed in coupling beam template employing fiber reinforcement high-damping polymer concrete and pours and can obtain required coupling beam,
During use, the length of coupling beam embedment Shear Walls limb takes wall limb thickness and the higher value of deck-molding 1/2.From the point of view of structure and parameter,
Mild steel plate 2 is positioned at the middle part of coupling beam and the both sides, end of mild steel plate 2 and is welded together by the stirrup 3 of spot welding with both ends, with
Time mild steel plate 2 upper and lower surface welded together by the stirrup 3 at spot welding and middle part；Mild steel plate 2 is H-shaped steel plate, mild steel plate 2
Thickness is the 1/15-1/10 of coupling beam width, the housing depth that the two ends height of mild steel plate 2 is constituted less than the stirrup 3 at both ends
To realize spot welding location, the miding level height of mild steel plate 2 is the 1/3-1/2 of the end height of mild steel plate 2, simultaneously in mild steel plate 2
Segment length is equal to the net span of coupling beam.
In above-mentioned coupling beam, the material component of the fiber reinforcement high-damping polymer concrete of use includes: cement, water,
Flyash, sand, polymeric additive, fiber and high efficiency water reducing agent, defoamer, dispersant, wherein cement uses Carnis Rapanae thomasianae board
P.O42.5 level Portland cement；Flyash uses I level flyash；The common river that sand uses modulus of fineness to be 1.6～2.2
Husky；Hydromining density is 1.0g/cm3, meet the ordinary tap water that " concrete water standard " (JGJ63-2006) requires；Poly-
Compound additive uses Carboxy emulsion or acrylate copolymer emulsion；Fiber uses elastic modelling quantity 42Gpa, draw ratio 7%
PVA fiber；Dispersant uses dodecylbenzene sodium sulfonate, is also tetrapropylene benzene sodium sulfonate, is that a kind of white powder powder is solid
Body, it is dissolved in water can become translucent solution, is mainly used as the surfactant in anionic；High efficiency water reducing agent uses outward appearance
Be the liquid of yellow transparent oily, water-reducing rate be the polycarboxylate water-reducer of 20～35%；Defoamer use tributyl phosphate, poly-third
One in olefin(e) acid ester, silane copper polyethers.It is cement the most in mass ratio: water: flyash: sand=1:(0.45～0.70):
(0.50～1.20): (1.00～2.20) select cement, water, flyash, sand, by cement and the 7 of flyash quality consumption～16%
Choose polymeric additive, choose high efficiency water reducing agent, by cement and fine coal by cement and the 0.8 of flyash quality consumption～1.8%
0.5%～the 1.2% of ash quality consumption chooses defoamer, chooses dispersion by cement and the 0.15 of flyash quality consumption～0.32%
Agent, fiber is PVA fiber, and 0.8%～2.5% by the cumulative volume of water, cement, flyash and sand choose PVA fiber；By above-mentioned former
Stir after material configuration in proportion and i.e. can get fiber reinforcement high-damping polymer concrete.
The application principle of fiber reinforcement high-damping polymer concrete is: fiber reinforcement high-damping polymer concrete by
During level bearing load, along with the progressively change of load is big, concrete component produces Article 1 microcrack at stress maximum,
Owing to there is preferable interfacial adhesion between PVA fiber and concrete substrate, the bridge joint effect that interfacial adhesion produces can
Connect the concrete at fiber two ends, thus limit the further expansion of this microcrack width.Transfer when load continues to increase
Producing new microcrack in other regions of component, and the width of every microcrack is less than 100um, this multiple cracking is simultaneously
Referred to as " multiple crack growth ", multiple crack growth can significantly increase the bearing capacity of component to the phenomenon being present on concrete component.Therefore
Concrete component load-bearing power and ductility that fiber reinforcement high-damping polymer concrete makes all are higher than normal concrete.Its Gao Yan
Property feature be particularly suited for coupling beam, it is possible to ensure that concrete connecting-beam still has good globality under big shake and simultaneously works as
The effect of power consumption.The concrete connecting-beam of built-in mild steel plate has compared to the concrete connecting-beam of common intensive aspect (reinforcing bar, shaped steel)
Following advantage: (1) mild steel is compared with tradition steel, and yield point is lower, i.e. occurs plasticity in the range of small strain and has height
Plastic deformation ability, it is possible to preferably and fiber reinforcement high-damping polymer concrete compatible deformation, jointly consume energy；(2) soft
The deviation amplitude of steel surrender bearing capacity is less compared to tradition steel, stable mechanical property under cyclic load, therefore suitableeer
Making together in prefabricated components；(3) concrete connecting-beam of built-in mild steel plate is lower than built-in profile steel concrete connecting-beam rigidity, and earthquake is made
Under with, the plastic hinge at coupling beam two ends produces prior to wall limb, it is to avoid some coupling beams cannot play power consumption effect in actual applications
Problem.
Further illustrate what the present invention provided below by the casting process of the highly energy-consuming concrete connecting-beam of built-in mild steel
Technical scheme.
The casting method of the highly energy-consuming precast concrete coupling beam of this built-in mild steel is: the stress of (1) colligation coupling beam is indulged muscle 1 and become
Rectangle is arranged, and it is fixed-type that the end stirrup 3 at the colligation coupling beam two ends, outside that stress indulges muscle 1 makes stress indulge muscle 1, puts into soft
Steel plate 2 is also positioned the inner side centre of end stirrup 3, and the both sides up and down of mild steel plate 2 are connected to one by spot welding and stirrup 3
Rise；The vertical muscle 4 of structure is arranged on stress and indulges between muscle 1 and be positioned at both sides before and after mild steel plate 2, also sets between the stirrup 3 at both ends
The stirrup 3 having middle part indulges muscle 1 and the vertical muscle 4 of structure for fixing stress, completes the spot welding remaining stirrup 3 with mild steel plate 2 simultaneously；
(2) Zhi Lianliang template；(3) fiber reinforcement high-damping polymer concrete is used to pour coupling beam；(4) after having poured, strike off
Surface, at surface covered with plastic film, water seasoning 28d after at room temperature maintenance 24 hours；(5) form removal, coupling beam pours
Complete.
Technology requires: the stress of coupling beam indulges muscle 1 and the vertical muscle 4 of structure should meet the calculating of coupling beam anti-bending bearing capacity and concrete is tied
Detailing requiments in structure design specification GB50010；The stirrup 3 of coupling beam should meet coupling beam shear resistance capacity and calculate and non-Aseismic Design
Detailing requiments；The size of mild steel plate 2 is with reference to schematic diagram, and for the 1/15-1/10 of coupling beam width, the two ends height of mild steel plate 2 does not surpasses
The housing depth of stirrup 3 composition crossing both ends positions to realize spot welding, and the miding level height of mild steel plate 2 is the end of mild steel plate 2
The 1/3-1/2 of height；Mild steel plate 2 preferably selects Japan to produce the mild steel being numbered LY225/160/100, and performance is relatively stable.
Beam example one repeatedly: sectional dimension is 120X500mm, net span be 600mm(net span be the company between shear wall
Beam length, does not includes the link length stretching in shear wall)；Stirrup 3 is 6@80, and stress is indulged muscle 1 and represented for 4C12(" C "
HRB400 level reinforcing bar), the vertical muscle 4 of structure represents HPB300 level reinforcing bar for 4B10(" B ").The size of mild steel plate 2: thickness is 10mm；
Two ends height is 440mm, and length is respectively 250mm；Miding level height is 200mm, a length of 600mm, adds up to total length 1040mm；Mild steel
Plate 2 be numbered LY160.Above stress is indulged the quantity of muscle 1 muscle 4 vertical with structure and is cross-section of coupling beam bilateral number of steel bars sum.
Illustrate that the fiber reinforcement high-damping polymer concrete material that the present invention uses possesses below by EXPERIMENTAL EXEMPLIFICATIONThe
The multinomial performance such as high Crack Control ability, energy absorption capability and high tenacity.
Cement uses Carnis Rapanae thomasianae board P.O42.5 level Portland cement；Flyash uses I level flyash；Sand uses fineness
Modulus is the common river sand of 1.6～2.2；Hydromining density is 1.0g/cm3, meet " concrete water standard " (JGJ63-
2006) ordinary tap water required；Polymeric additive uses acrylate copolymer emulsion；Fiber uses elastic modelling quantity 42Gpa, length
The footpath PVA fiber (vinal) than 7%；Dispersant uses dodecylbenzene sodium sulfonate；High efficiency water reducing agent uses water-reducing rate
It it is the polycarboxylate water-reducer of 35%；Defoamer uses silane copper polyethers.
It is cement in mass ratio: water: flyash: sand 1:0.55:0.6:1.8 selects cement, water, flyash, sand, by cement
Choose polymeric additive with the 7% of flyash quality consumption, choose efficient diminishing by the 0.8% of cement and flyash quality consumption
Agent, chooses defoamer by the 1.05% of cement and flyash quality consumption, chooses by the 0.30% of cement and flyash quality consumption
Dispersant, chooses PVA fiber by the 1.8% of the cumulative volume of water, cement, flyash and sand；Stir after above-mentioned raw materials is configured in proportion
Mix and uniformly i.e. can get fiber reinforcement high-damping polymer concrete.
In tension test: ultimate tensile strength and limit stress are respectively 2.22% and 3.3Mpa, it is the 20.2 of pure matrix respectively
Again with 2.84 times.Damping ratio is tested: use the free Attenuation Method of cantilever beam, under the free end mode of cantilever beam, taps freely
End, utilizes free damping curve to measure logarithmic decrement and the damping ratio of complex cement base；Fiber reinforcement high-damping polymer
The damping ratio of the purer matrix of concrete improves 31.02%, and the concrete numerical value of actual damping ratio is 6.8%.Why fiber can carry
The damping capacity of high material is because: when PVA fiber disperses in the base when, and fiber and matrix have certain interface to tie
Close, the sliding friction at interface can be produced under forced movement, be a changes mechanical energy be the process of frictional heat energy.
The coupling beam of the present invention is indulged the stirrup 3 outside muscle 1 and the vertical muscle 4 of structure, vertical muscle, built-in by the stress running through prefabricated coupling beam
Mild steel plate 2 in coupling beam is as intensive aspect, and fiber reinforcement high-damping polymer concrete is as matrix, and this coupling beam is compared to biography
The concrete connecting-beam of system, owing to have employed fiber reinforcement high-damping polymer concrete as matrix built-in mild steel plate 2 so that
Shear-carrying capacity and the ductility of coupling beam are improved, and have good energy consumption effect under geological process.The coupling beam of the present invention is adopted
Be fiber reinforcement high-damping polymer concrete, the bridge joint effect of PVA fiber makes coupling beam destroy at bearing load
During, showing " multiple crack growth " and the feature of " strain hardening ", every microcrack, less than 100um, therefore uses
Fiber reinforcement high-damping polymer concrete can improve the bearing capacity of coupling beam, and the cracking alleviating coupling beam concrete peels off.
The coupling beam of the present invention uses mild steel plate 2 to undertake a part of shearing as intensive aspect so that coupling beam failure mode obtains
Improving, more showing as bends failure by shear；Mild steel plate 2 is put into plasticity in the range of small strain simultaneously, plays power consumption earlier
Effect；The addition of mild steel plate 2 will not make coupling beam rigidity increase substantially, it is to avoid common shaped steel coupling beam shear wall plastic hinge is first
The shortcoming resulting from wall limb.Mild steel plate 2 in coupling beam can bond with the fiber reinforcement high-damping polymer concrete of high ductility
Co-ordination together, alleviates the bond-slip problem between normal concrete and reinforcing bar, improves the change of concrete connecting-beam
Shape ability, thus improve ductility and the energy dissipation capacity of concrete connecting-beam；Under big displacement and big load action, this coupling beam can be protected
Holding preferable globality, shear-carrying capacity is improved simultaneously, and Stiffness Deterioration have also been obtained postponement.
Above example is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every
The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within scope
Within；The technology that the present invention is not directed to all can be realized by prior art.
Claims (8)
1. a highly energy-consuming concrete connecting-beam for built-in mild steel, indulges the vertical muscle (4) of muscle (1), stirrup (3) and structure including stress, its
It is characterised by: the stirrup (3) that the stress of rectangular setting indulges muscle (1) employing end is fixed-type, and the stirrup (3) at both ends is constituted
Inside cavity place mild steel plate (2), the two ends of mild steel plate (2) are separately fixed on the stirrup (3) at both ends, the vertical muscle of structure
(4) it is arranged on stress indulge between muscle (1) and be positioned at both sides before and after mild steel plate (2), in being also provided with between the stirrup (3) at both ends
The stirrup (3) in portion is used for fixing stress and indulges muscle (1) and the vertical muscle (4) of structure；Said structure is placed in coupling beam template employing fiber
Enhancing high-damping polymer concrete pours and can obtain required coupling beam.
The highly energy-consuming concrete connecting-beam of built-in mild steel the most according to claim 1, it is characterised in that: described mild steel plate
(2) it is positioned at the middle part of coupling beam and the both sides, end of mild steel plate (2) to be welded together by the stirrup (3) of spot welding with both ends.
The highly energy-consuming concrete connecting-beam of built-in mild steel the most according to claim 2, it is characterised in that: described mild steel plate (2)
Upper and lower surface welded together by the stirrup (3) at spot welding and middle part.
4. according to the highly energy-consuming concrete connecting-beam of the arbitrary described built-in mild steel of claim 1-3, it is characterised in that: described is soft
Steel plate (2) is H-shaped steel plate, and the 1/15-1/10 that thickness is coupling beam width of mild steel plate (2), the two ends height of mild steel plate (2) is not
Exceeding housing depth that the stirrup (3) at both ends constitutes to realize spot welding location, the miding level height of mild steel plate (2) is mild steel plate
(2) 1/3-1/2 of end height.
The highly energy-consuming concrete connecting-beam of built-in mild steel the most according to claim 4, it is characterised in that: described mild steel plate (2)
Middle segment length equal to the net span of coupling beam.
The highly energy-consuming concrete connecting-beam of built-in mild steel the most according to claim 1, it is characterised in that: described coupling beam embedment
The length of Shear Walls limb takes wall limb thickness and the higher value of deck-molding 1/2.
The highly energy-consuming concrete connecting-beam of built-in mild steel the most according to claim 1, it is characterised in that: described fiber reinforcement is high
The material component of damping materials concrete includes: cement, water, flyash, sand, polymeric additive, fiber and efficient diminishing
Agent, defoamer, dispersant, be cement: water: flyash: sand=1:(0.45～0.70 the most in mass ratio): (0.50～1.20):
(1.00～2.20) select cement, water, flyash, sand, choose polymer by cement and the 7 of flyash quality consumption～16% and add
Add agent, choose high efficiency water reducing agent by cement and the 0.8 of flyash quality consumption～1.8%, by cement and flyash quality consumption
0.5%～1.2% chooses defoamer, chooses dispersant by cement and the 0.15 of flyash quality consumption～0.32%, and fiber is PVA
Fiber, 0.8%～2.5% by the cumulative volume of water, cement, flyash and sand choose PVA fiber；Above-mentioned raw materials is configured in proportion
After stir and i.e. can get fiber reinforcement high-damping polymer concrete.
The highly energy-consuming concrete connecting-beam of built-in mild steel the most according to claim 7, it is characterised in that: described cement uses
42.5 grades of Portland cements of Carnis Rapanae thomasianae board P.O；Flyash uses I level flyash；Sand uses modulus of fineness to be 1.6～2.2
Common river sand；Hydromining density is 1.0g/cm3, meet that " concrete water standard " (JGJ63-2006) require common the most from the beginning
Water；Polymeric additive uses Carboxy emulsion or acrylate copolymer emulsion；Fiber uses elastic modelling quantity 42Gpa, draw ratio
The PVA fiber of 7%；Dispersant uses dodecylbenzene sodium sulfonate；The polycarboxylic acids that high efficiency water reducing agent uses water-reducing rate to be 20～35%
Water reducer；Defoamer uses the one in tributyl phosphate, polyacrylate, silane copper polyethers.
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| CN113863487A (en) * | 2021-08-26 | 2021-12-31 | 江苏华源建筑设计研究院股份有限公司 | Construction process for connecting joints of beam-end steel concrete combined notched beam and primary and secondary beams |
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