CN109881777A - A prefabricated high-toughness cement-based composite beam-column joint - Google Patents
A prefabricated high-toughness cement-based composite beam-column joint Download PDFInfo
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- CN109881777A CN109881777A CN201910164589.1A CN201910164589A CN109881777A CN 109881777 A CN109881777 A CN 109881777A CN 201910164589 A CN201910164589 A CN 201910164589A CN 109881777 A CN109881777 A CN 109881777A
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- 239000002131 composite material Substances 0.000 title claims abstract description 69
- 239000004568 cement Substances 0.000 title claims abstract description 27
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 104
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 230000003014 reinforcing effect Effects 0.000 claims description 23
- 230000002787 reinforcement Effects 0.000 claims description 17
- 239000004567 concrete Substances 0.000 claims description 13
- 239000011178 precast concrete Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 14
- 238000005266 casting Methods 0.000 abstract description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 12
- 244000046052 Phaseolus vulgaris Species 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000011440 grout Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
本发明公开一种装配式高韧性水泥基复合材料梁柱节点，包括预制钢筋混凝土梁及预制钢筋混凝土柱，预制钢筋混凝土梁和预制钢筋混凝土柱之间通过外伸段的预埋不等肢“U”形钢筋，梁、柱预留钢筋的连接套筒，以及高韧性水泥基复合材料的“工”形后浇区进行连接，预制钢筋混凝土柱在节点核心区浇筑高韧性水泥基复合材料。通过对于节点核心区、悬臂段以及外伸段的构造处理及新材料的利用，本发明在能够实现裂缝控制、提高节点的抗剪强度、提高延性水平和耗能能力以及“强节点弱构件”的抗震要求的同时，能够较大幅度地提高现场施工质量和施工效率，具有广阔的应用前景。
The invention discloses a prefabricated high-toughness cement-based composite material beam-column joint, comprising prefabricated reinforced concrete beams and prefabricated reinforced concrete columns, and pre-buried unequal limbs between the prefabricated reinforced concrete beams and the prefabricated reinforced concrete columns through outriggers. U"-shaped steel bars, connecting sleeves of reserved steel bars for beams and columns, and "I"-shaped post-casting areas of high-toughness cement-based composite materials are connected, and high-toughness cement-based composite materials are poured in the core area of the node for prefabricated reinforced concrete columns. Through the structural treatment of the core area of the node, the cantilever section and the outrigger section and the utilization of new materials, the invention can realize crack control, improve the shear strength of the node, improve the ductility level and energy dissipation capacity, and "strong node and weak member". At the same time, it can greatly improve the construction quality and construction efficiency on site, and has broad application prospects.
Description
Technical field
The invention belongs to prefabricated assembling type reinforced concrete bean column node field more particularly to a kind of assembled high tenacity water
Cement-based composite material bean column node.
Background technique
Fabricated construction is mainly to be passed through safely and effectively to connect and compose at the scene by the prefabricated member of prefabrication,
Have the characteristics that environmentally protective, energy-efficient, reliable in quality, influenced by seasonal climate it is lesser；Bean column node is in structural system
The transmitting and distribution of power are carried out, stress power transmission mechanism is complicated, and the validity of node, which often becomes, determines concrete under geological process
Whether frame structure collapses the key factor of destruction；The node connection of fabricated construction is the weakness of fabricated construction system
Link, while being also the key link for guaranteeing that fabricated construction system is safe and reliable.
The outstanding problem of assembly concrete bean column node is beam-to-column joint region due to lacking good connectivity at present
It can make beam-to-column joint link weakness, distress in concrete early occur and site construction technology is complicated；Simultaneously because beam-ends plastic hinge
It is too early appearance so that the shear behavior in joint core region is degenerated rapidly, the control ability of destruction of a node cannot ensure, knot
Ductility and energy consumption of the structure under geological process is insufficient.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of above-mentioned factor in the prior art, a kind of safer reliable, node is provided
Ductility and energy consumption increases substantially, and the convenient and fast novel fabricated bean column node of high construction efficiency.
A kind of assembled high tenacity cement-base composite material bean column node, it is characterised in that: including prefabricated reinforced concrete
Beam and prefabricated reinforced concrete column, the precast reinforced concrete beam include the left beam of prefabricated reinforced concrete (1) and pre-manufactured steel
The right beam of reinforced concrete (2), the prefabricated reinforced concrete column include prefabricated reinforced concrete lower prop (3), precast reinforced coagulation
Native upper prop (4) and prefabricated high tenacity cement-base composite material joint cores (5), the end of the precast reinforced concrete beam
First overhanging section (20) that portion has sectional dimension to reduce, the prefabricated high tenacity cement-base composite material joint cores (5)
There is second that the cantilever segment (23) for stretching out column section and sectional dimension reduce in the region being connected with left and right precast reinforced concrete beam
Overhanging section (21), the prefabricated high tenacity cement-base composite material joint cores (5) and the prefabricated reinforced concrete
Upper prop (4), prefabricated reinforced concrete lower prop (3) connecting portion have overhanging section of third (22) that sectional dimension reduces；Described is pre-
High tenacity cement-base composite material processed joint cores (5) top and bottom pass through respectively overhanging section of third (22) with it is described pre-
The groove connection of armored concrete upper prop (4), prefabricated reinforced concrete lower prop (3) processed, styletable bolt (18) is passed through corresponding
Bolt duct fastens the prefabricated reinforced concrete column；
Further, the overhanging of upper reinforcement (8) is reserved in the prefabricated high tenacity cement-base composite material joint cores
Section sponson corresponding with the left and right precast reinforced concrete beam reserved upper reinforcement (7) passes through upper reinforcement grouting and covers
Cylinder (14) connection, the prefabricated high tenacity cement-base composite material joint cores reserve overhanging section of lower rebar (12) with
The left and right precast concrete beam is reserved lower rebar (9) corresponding sponson and is connected by lower rebar grout sleeve (15)
It connects, second overhanging section of the prefabricated high tenacity cement-base composite material joint cores are pre-buried not equal limbs " u "-shaped reinforcing bar (11)
Pass through not equal limbs with corresponding described first overhanging section of left and right precast reinforced concrete beam pre-buried not equal limbs " u "-shaped reinforcing bar (10)
" u "-shaped reinforcing bar grout sleeve (13) connection, the prefabricated high tenacity cement-base composite material joint cores (5) with it is described
Left and right precast reinforced concrete beam between " work " shape after pour part be the area high tenacity cement-base composite material Hou Jiao (6).
Further, a kind of assembled high tenacity cement-base composite material bean column node, it is characterised in that: described
Prefabricated reinforced concrete upper prop (4), the prefabricated reinforced concrete lower prop (3), the prefabricated high tenacity cement base are compound
Material node core space (5) is to be integrally formed.
Further, first overhanging section (20) have first overhanging section of stirrup (16) to be constrained, and described is prefabricated
Beams of concrete top has overhanging precast reinforced concrete beam to reserve upper reinforcement (7), under the precast reinforced concrete beam
Portion has overhanging precast reinforced concrete beam to reserve lower rebar (9), and the precast reinforced concrete beam reserves upper reinforcement
(7) it is not identical to reserve lower rebar (9) extension for precast reinforced concrete beam.
Further, first overhanging section of described (20) end has first overhanging section pre-buried not equal limbs " u "-shaped reinforcing bar (10), institute
Overhanging section of second stated (21) end has described in second overhanging section pre-buried not equal limbs " u "-shaped reinforcing bar (11) second overhanging section
(21) second overhanging section of stirrup (17) is constrained.
Further, prefabricated high tenacity cement-base composite material joint cores (5) and described precast reinforced mixed
Solidifying soil upper prop (4), prefabricated reinforced concrete lower prop (3) connecting portion have overhanging section of third (22) that sectional dimension reduces, described
There is overhanging section of stirrup (19) constraint of third for overhanging section of third (22), overhanging section of the third is reserved with pluggable styletable bolt
(18) duct.
The prefabricated reinforced concrete upper prop (4), prefabricated reinforced concrete lower prop (3) are fluted, and in corresponding position
Place is reserved with pluggable styletable bolt (18) duct.
It should be noted that the sectional dimension of the precast reinforced concrete beam first overhanging section (21) reducing with
And second overhanging section (22) that the prefabricated high tenacity cement-base composite material joint cores sectional dimension reduces are due to overhanging
Section is increased pours contact area between material with after, advantageously allow the precast reinforced concrete beam and after pour material it
Between and the prefabricated high tenacity cement-base composite material joint cores (5) and after the adhesive property that pours between material mention
Height, the cantilever segment (23) that the prefabricated high tenacity cement-base composite material joint cores (5) stretch out column section can be to avoid beam
End plastic hinge is prematurely formed in column section, while using the highly energy-consuming performance of high tenacity cement-base composite material, improving node
Energy dissipation capacity.
It should be noted that its entirety of the prefabricated reinforced concrete column is formed by prefabrication, prefabrication process is first
Assembling reinforcement by the prefabricated completion of the prefabricated reinforced concrete upper prop and prefabricated reinforced concrete lower prop and reaches pre-hardening state
Afterwards, then using high tenacity cement-base composite material by prefabricated high tenacity cement-base composite material joint cores (5) prefabricated completion,
And an entirety is become, the truncation that reinforcing bar in column can be effectively prevented weakens the influence to what the stress performance of column generated, has
Conducive to the realization of " strong column and weak beam ".
It should be noted that the precast reinforced concrete beam is reserved lower rebar (9) and described precast reinforced is mixed
The extension that solidifying Tu Liang reserves upper reinforcement (7) is not identical and " u "-shaped reinforcing bar does not wait limbs that can be effectively prevented sleeve company
Plane of weakness is poured after connecing the biggish perforation of the section rigidity to be formed, the interface is caused to destroy, ensure that bean column node is good
Stress performance.
It should be noted that by the prefabricated high tenacity cement-base composite material joint cores (5) with it is described pre-
It, will be outside third using styletable bolt (18) after armored concrete lower prop (3) processed and prefabricated reinforced concrete upper prop (4) are respectively embedded into
It stretches section (22) and groove fastens, the cohesive force due to high tenacity cement-base composite material and concrete material can be effectively avoided
Deficiency causes two kinds of materials in loading process to be individually forced into " two skins ", ensure that two kinds of common stress of material, reaches pre-
The stressed effect of phase.
It should be noted that first overhanging section (20), second overhanging section (21), overhanging section of third (22) due to
Sectional dimension is smaller, using overhanging section of first overhanging section of stirrup (16), second overhanging section of stirrup (17), third stirrup
(18) its section is constrained, provides lateral support to improve the strength of materials, while for it, can be effectively avoided due to
The destruction for fractureing or breaking in transport, casting process and loading process caused by the reduction of sectional dimension, in addition, steel
Muscle hoop and after pour material since the cohesive force that mechanical snap power is formed can be enhanced between prefabricated components and prefabricated components, prefabricated structure
Cohesive force between part and cast-in-place material, overhanging section of prefabricated high tenacity cement-base composite material joint cores (5) with it is prefabricated
Overhanging section of beam is not directly contacted with, and passes through a pair of pre-buried screw shell connection not waited between limbs " u "-shaped reinforcing bar；It can pass through
The high tenacity cement-base composite material poured afterwards is more preferable for the connection between the connection and " u "-shaped reinforcing bar in two extended segments gap
Precast reinforced concrete beam and prefabricated high tenacity cement-base composite material joint cores (5) are contacted, pour high-ductility
Property the area " work " the Xing Houjiao high tensile toughness that can use high tenacity cement-base composite material that is formed of cement-base composite material have
Avoid junction in premature rupture after by curved effect to effect.
Compared with prior art, the present invention has following gain effect: (1) connecting structure measure complexity is precast reinforced mixed
Solidifying earth pillar is realized by the accurate one-piece casting of factory's flowing water, is avoided due to site operation since construction technology and execution conditions cause
Quality difference and excessive error, (2) precast reinforced concrete beam, column junction by screw shell and the area Hou Jiao it is effective
Construction measure be attached, one side construction technology is simple, on the other hand precast concrete beam column can effectively be connected,
It avoids crack to generate and develop too early, (3) prefabricated reinforced concrete core space is arranged by cantilever segment and overhanging section and construction
The design applied can effectively avoid the generation for slowing down crack and plastic hinge, be conducive to mentioning for ductility and energy dissipation capacity at node
Height greatly improves the anti-seismic performance that prefabricated assembled bean column node is under geological process, realizes good destruction function
Control.
It is described in further detail below in conjunction with attached drawing.
Detailed description of the invention
Fig. 1 is a kind of assembled high tenacity cement-base composite material bean column node front section view,
Fig. 2 is prefabricated reinforced concrete column front section view,
Fig. 3 is prefabricated high tenacity cement-base composite material joint cores front section view,
Fig. 4 is prefabricated reinforced concrete lower prop front section view,
Fig. 5 is prefabricated reinforced concrete upper prop front section view,
Fig. 6 is the left beam front section view of prefabricated reinforced concrete,
Fig. 7 is the right beam front section view of prefabricated reinforced concrete.
The left beam of 1, prefabricated reinforced concrete in figure, 2, the right beam of prefabricated reinforced concrete, 3, prefabricated reinforced concrete lower prop, 4,
Prefabricated reinforced concrete upper prop, 5, prefabricated high tenacity cement-base composite material joint cores, 6, high tenacity cement base composite wood
The area Liao Houjiao, 7, the reserved upper reinforcement of precast reinforced concrete beam, 8, prefabricated high tenacity cement-base composite material joint cores
Reserved upper reinforcement, 9, precast reinforced concrete beam reserve lower rebar, 10, first overhanging section of pre-buried limbs " u "-shaped reinforcing bar such as not,
11, second overhanging section of pre-buried limbs " u "-shaped reinforcing bar such as not, 12, prefabricated high tenacity cement-base composite material joint cores leave in advance
Portion's reinforcing bar, 13, the limbs " u "-shaped reinforcing bar grout sleeve such as not, 14, upper reinforcement grout sleeve, 15, lower rebar grout sleeve,
16, first overhanging section of stirrup, 17, second overhanging section of stirrup, 18, styletable bolt, overhanging section of 19, third stirrup, 20,
One overhanging section, 21, second overhanging section, 22, overhanging section of third, 23, cantilever segment.
Specific embodiment
Present invention will now be described in detail with reference to the accompanying drawings., the description of this part be only used as it is exemplary and explanatory, no
Reply protection scope of the present invention has any restrictions effect.In addition, description of the those skilled in the art according to file, it can be right
Feature in this document embodiment and in different file embodiments carries out the corresponding combination.
A kind of assembled high tenacity cement-base composite material bean column node, it is characterised in that: including prefabricated reinforced concrete
Beam and prefabricated reinforced concrete column, the precast reinforced concrete beam include the left beam of prefabricated reinforced concrete (1) and pre-manufactured steel
The right beam of reinforced concrete (2), the prefabricated reinforced concrete column include prefabricated reinforced concrete lower prop (3), precast reinforced coagulation
Native upper prop (4) and prefabricated high tenacity cement-base composite material joint cores (5), the end of the precast reinforced concrete beam
Portion have sectional dimension reduce first overhanging section, the prefabricated high tenacity cement-base composite material joint cores with it is left and right
There is second overhanging section that the cantilever segment for stretching out column section and sectional dimension reduce in the connected region of precast reinforced concrete beam, described
Prefabricated high tenacity cement-base composite material joint cores (5) and the prefabricated reinforced concrete upper prop (4), precast reinforced
Concrete lower prop (3) connecting portion has overhanging section of third that sectional dimension reduces；The prefabricated high tenacity cement base composite wood
Material joint cores (5) top and bottom pass through overhanging section of third and the prefabricated reinforced concrete upper prop (4), prefabricated respectively
The groove of armored concrete lower prop (3) connects, by styletable bolt (18) by corresponding bolt duct, to the pre-manufactured steel
Reinforced concrete column is fastened；
The prefabricated high tenacity cement-base composite material joint cores reserve overhanging section of upper reinforcement (8) with it is described
Left and right precast reinforced concrete beam reserve upper reinforcement (7) corresponding sponson and pass through upper reinforcement grout sleeve (14) company
Connect, the prefabricated high tenacity cement-base composite material joint cores reserve overhanging section of lower rebar (12) with it is described
Left and right precast concrete beam is reserved lower rebar (9) corresponding sponson and is connected by lower rebar grout sleeve (15), described
Pre-buried not equal limbs " u "-shaped reinforcing bar (11) in second overhanging section of prefabricated high tenacity cement-base composite material joint cores and corresponding institute
First overhanging section of the left and right precast reinforced concrete beam stated pre-buried not equal limbs " u "-shaped reinforcing bar (10) is not by waiting limbs " u "-shaped reinforcing bar
Grout sleeve (13) connection, the high tenacity cement-base composite material joint cores (5) with it is described left and right precast reinforced
" work " shape gap between beams of concrete is the area high tenacity cement-base composite material Hou Jiao (6).
Work progress:
Step 1: prefabricated reinforced concrete column.Tying up for steel reinforcement cage is first carried out during prefabricated reinforced concrete in factory
It pricks, notices that the reserved steel bar length of the beam of core space cantilever segment is unequal, in the corresponding position prepared screw-bolt hole of upper prop and lower prop
Road, place in place arrange rectangle stirrup, and arrange that overhanging section is not waited the " u "-shaped reinforcing bar of limbs in the position of upper prop and lower prop
Formwork is carried out, casting concrete simultaneously vibrates；After concrete reaches initial set, pouring for high tenacity cement-base composite material is completed
It builds and vibrates, after high-tenacity fiber enhancing cement-based material reaches final set, bolt is passed sequentially through to the groove of upper prop or lower prop
And the reserving hole channel of overhanging section of third of high ductility cement-base composite material joint cores, nut is fastened.
Step 2: precast reinforced concrete beam.Precast reinforced concrete beam first carries out reinforcing bar binding in factory, pays attention to beam
Top reserved steel bar it is different from the length of lower part reserved steel bar but must be corresponding with the reserved steel bar of core space, in suitable position
Overhanging section of place's arrangement does not wait the " u "-shaped reinforcing bar and rectangle stirrup of limbs to complete concrete to precast reinforced concrete beam formwork
Pour and vibrate.
Step 3: by prefabricated reinforced concrete column (3) and the left beam of prefabricated reinforced concrete (1) Ji Youliang (3) location and installation,
And stirrup is arranged in the appropriate location of post-cast strip, by corresponding longitudinal reinforcement and do not wait the " u "-shaped reinforcing bar of limbs to carry out sleeve connection
Afterwards, formwork is carried out to post-cast strip part, and pours high tenacity cement-base composite material, progress is appropriate to vibrate, and realizes precast beam
Column border node connection.
This example, which is hardened and had using the high-tensile of high tenacity cement-base composite material, elongation strain, well to be split
Control ability is stitched, the crack progressing situation of beam column end, joint cores and the area Hou Jiao can be effectively improved, improves component bending resistance
And shear resistant capacity；The characteristics of using high tenacity cement-base composite material highly energy-consuming, it can effectively improve the energy consumption at node
Ability；The setting of cantilever segment can delay the destruction of joint cores in column, realize " the strong weak component of node " and provide fortification against earthquakes and want
It asks；Beam-ends, styletable pass through overhanging section of setting, " u "-shaped limbs reinforcing bar, rectangle stirrup, the bolt and uniqueness for connection such as not
The construction measures such as the area " I " fonts Hou Jiao can effectively improve the adhesive property between material, prevent the shape of plane of weakness
At；The complicated manufacturing process continuous productive process completion in the factory of prefabricated reinforced concrete column, precast reinforced concrete beam, scene is applied
Work only needs to carry out pouring for sleeve connection and the area Hou Jiao, and construction technology is simple, and quality is easy to control, and construction work is greatly improved
Make efficiency.
In the embodiment above, the group of the high tenacity cement-base composite material is divided into cement, flyash, fine sand, PVA
Fiber, water-reducing agent and water, wherein by mass percentage, water: cement: flyash: fine sand: water-reducing agent=0.24:0.4:
0.6:0.46:0.001；The volume volume of PVA fiber is 1.7%.
By weighed cement, flyash, after quartz sand dry mixing 1-3 minutes, weighed water-reducing agent and the stirring of 75% water is added
To liquid-plastic state；Then the water of residue 25% is added, stirs 3-5 minutes, is slowly sprinkled into PVA fiber, is stirred until homogeneous, can arrive
To high tenacity cement-base composite material.
The part that the present embodiment does not specifically describe belongs to the common knowledge and well-known technique of the art, herein not
Another one is described in detail.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (5)
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| CN201910164589.1A CN109881777B (en) | 2019-03-05 | 2019-03-05 | Assembled high-toughness cement-based composite material beam column joint |
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| CN201910164589.1A CN109881777B (en) | 2019-03-05 | 2019-03-05 | Assembled high-toughness cement-based composite material beam column joint |
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Cited By (4)
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| CN110295764A (en) * | 2019-07-01 | 2019-10-01 | 山东建筑大学 | The reinforcement means of fire and the coefficient impaired reinforced concrete frame of earthquake |
| CN112267576A (en) * | 2020-11-11 | 2021-01-26 | 吉林建筑科技学院 | Prefabricated section steel concrete column and reinforced concrete beam connecting joint and construction process thereof |
| CN116104051A (en) * | 2023-01-16 | 2023-05-12 | 中铁十二局集团有限公司 | A connection structure between prestressed U-shaped aqueduct and post-cast tie rod |
| CN117326830A (en) * | 2023-09-28 | 2024-01-02 | 成都托启新材料科技有限公司 | ECC material, preparation method and application |
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| CN117326830A (en) * | 2023-09-28 | 2024-01-02 | 成都托启新材料科技有限公司 | ECC material, preparation method and application |
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