CN106193288A - A kind of precast concrete node pouring ECC layer - Google Patents
A kind of precast concrete node pouring ECC layer Download PDFInfo
- Publication number
- CN106193288A CN106193288A CN201610549820.5A CN201610549820A CN106193288A CN 106193288 A CN106193288 A CN 106193288A CN 201610549820 A CN201610549820 A CN 201610549820A CN 106193288 A CN106193288 A CN 106193288A
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- steel plate
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- node
- precast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of precast concrete node pouring ECC layer, including square steel tube, precast beam, prefabricated post；Precast beam and prefabricated post are the outer ring being arranged on framework of steel reinforcement that some stirrups are coaxial and are parallel to each other, square steel tube is the most longitudinally built in prefabricated post, it is respectively equipped with steel plate 1 on the both sides longitudinal terminal surface of square steel tube, the transverse end of steel plate 1 connects the steel plate 2 being built in precast beam, steel plate 1 and steel plate 2 are in same longitudinal surface after connecting, between square steel tube lateral surface and prefabricated post, between steel plate 2, between steel plate 1, the region of composition constitutes main casting area, pours engineered cementitious based composites ECC layer in main casting area.The precast concrete node of a kind of ECC of pouring layer of the present invention has the advantages such as speed of application is fast, node is easy to connect, intensity is high, quality control is more secure, and has more safety, the suitability, durability and economy.
Description
Technical field
The present invention relates to a kind of concrete joint, be specifically related to a kind of precast concrete node pouring ECC layer.
Background technology
At present, concrete-filled rectangular steel tube combinative structure has been widely used in architectural engineering, concrete-filled rectangular steel tube combination knot
Structure technology has obtained tremendous development the most, and concrete-filled rectangular steel tube combinative structure is high because of its bearing capacity, the advantages such as ductility is good
Widely applying in engineering, along with Super High and the continuous appearance of long span building structure, concrete-filled rectangular steel tube junction point becomes
For one of important content in Architectural Structure Design, connect node directly affects overall performance under the conditions of structural bearing with
And the load-bearing property of coupled structure, therefore the performance of connecting joint structure can not be ignored.
At present in China, for engineered cementitious based composites ECC (Engineered Cementitious
Composites) research and application are the most less, and the most of Practical Project remain normal concrete.
Summary of the invention
For solving the deficiencies in the prior art, it is an object of the invention to provide one and there is greater security, the suitability, resistance to
Property and the precast concrete node of economy for a long time.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that:
A kind of precast concrete node pouring ECC layer, including square steel tube, precast beam, prefabricated post；Described precast beam is with pre-
Post processed is the outer ring being arranged on framework of steel reinforcement that some stirrups are coaxial and are parallel to each other, and described square steel tube is the most longitudinally built in pre-
Post processed, the both sides longitudinal terminal surface of described square steel tube is respectively equipped with steel plate 1, and the transverse end connection of described steel plate 1 is built in prefabricated
The steel plate 2 of beam, described steel plate 1 and steel plate 2 are in same longitudinal surface after connecting, between described square steel tube lateral surface and prefabricated post,
Between steel plate 2, between steel plate 1, the region of composition constitutes main casting area, pours engineered cementitious base multiple in described main casting area
Condensation material ECC layer.
Square steel tube is arranged in prefabricated post node, junction steel plate 1 and steel plate 2, enhances overall performance and the intensity of node.
Steel plate 1 and steel plate 2 connect for prefabricated post node and precast beam node, bear and draw/compressive stress.
The outer ring of above-mentioned square steel tube is provided with transverse steel skeleton.
Framework of steel reinforcement constitutes structural solid, strengthens precast beam and the bulk strength of prefabricated post；Stirrup increases the anti-of oblique section
Shear stress, and connect connection muscle of being advocated and jointly act on.
Above-mentioned steel plate 2 is fixing with longitudinal surface inside the two of precast beam to be connected.
Casting concrete layer in above-mentioned square steel tube.
After-pouring concrete layer or engineered cementitious based composites ECC layer in above-mentioned precast beam.
After-pouring concrete layer or engineered cementitious based composites ECC layer in above-mentioned prefabricated post.
Above-mentioned steel plate 1 and steel plate 2 are bolted.
Make steel plate 1 combine closely with steel plate 2 by bolt, by rubbing surface, the power on steel plate 2 is delivered to steel plate 1, i.e.
Power on precast beam is delivered in prefabricated post.Bolt connects the bonding strength between strengthening steel plate, and is damaged at precast beam
After wound, convenient maintenance or replacing precast beam, without regard to prefabricated post, safeguard overall safety.
The invention have benefit that: the beam column of a kind of precast concrete node pouring ECC layer of the present invention uses
Built-in steel construction, utilizes high-strength bolt to connect built-in steel plate, relatively conventional connected mode, has that speed of application is fast, node connects
The advantages such as convenient, intensity height, quality control are more secure, and have more safety, the suitability, durability and economy.
By the improvement of structure, under cyclic load, from the core of node at the final destruction of precast concrete node
Heart region, turns to precast beam light plate end and bolted connection position, destroys position and obtains outer shifting, meets " strong column and weak beam "
Principle.
Precast concrete node, while improving bearing capacity, maintains preferable ductility, and in the main pouring area of node
Territory uses engineered cementitious based composites ECC to pour, and node region is strengthened, carried by the most pre-buried square steel tube
The high power consumption of node, meets the design principle of " strong node, weak component ".
The use of engineered cementitious based composites ECC, improves anti-seismic performance and the injury resistant ability of node, and then reduces
Be used for repairing the expense of node, and the configuration of ECC after shake, available industrial waste flyash replace about 50% cement who
Material, it is achieved recycling utilizes, and cost is lower.
Additionally, the good density of ECC, effectively stop harmful substance to the infiltration within construction material, improve component
Durability, extend the service life of structure,
Accompanying drawing explanation
Fig. 1 is the side view of the structural representation of a kind of precast concrete node pouring ECC layer of the present invention.
Fig. 2 is the top view of the structural representation of a kind of precast concrete node pouring ECC layer of the present invention.
Fig. 3 is the perspective view of the structural representation of a kind of precast concrete node pouring ECC layer of the present invention.
Fig. 4 is the outside drawing of the structural representation of a kind of precast concrete node pouring ECC layer of the present invention.
Fig. 5 is the hysteresis loop of finite element software ABAQUS simulation cast-in-place concrete node.
Fig. 6 is the hysteresis loop of finite element software ABAQUS simulation precast concrete node.
Fig. 7 is to pour ECC layer in finite element software ABAQUS simulates the main casting area of precast concrete node and pour mixed
The load-displacement skeleton curve of solidifying soil C60 layer.
In accompanying drawing, the implication of labelling is as follows: 1, square steel tube, 2, prefabricated post, 3, precast beam, 4, steel plate 1,5, steel plate 2,6, hoop
Muscle, 7, framework of steel reinforcement.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention made concrete introduction.
A kind of precast concrete node, including side 1 steel pipe, 3 precast beams, 2 prefabricated post；3 precast beams and 2 prefabricated post are some
6 stirrups are coaxial and the outer ring being arranged on 7 frameworks of steel reinforcement that is parallel to each other, and 1 square steel tube is the most longitudinally built in 2 prefabricated post, 1 square steel
The transverse end being respectively equipped with 4 steel plate Isosorbide-5-Nitrae steel plates 1 on the both sides longitudinal terminal surface of pipe is bolted 5 steel being built in precast beam 3
Plate 2,4 steel plate 1 and 5 steel plates 2 are in same longitudinal surface after connecting, between described 1 square steel tube lateral surface and 2 prefabricated post, 5 steel plates 2
Between, between 4 steel plates 1 composition region constitute main casting area, pour engineered cementitious base composite wood in described main casting area
Material ECC layer.
The outer ring of 1 square steel tube is provided with horizontal 7 frameworks of steel reinforcement.
Inside 5 steel plates 2 and the two of 3 precast beams, longitudinal surface is fixing is connected.
Casting concrete layer in 1 square steel tube.
After-pouring concrete layer or engineered cementitious based composites ECC layer in 3 precast beams and 2 prefabricated post.
Cast-in-place concrete node, under cyclic load, is joint core region at final destruction, and precast concrete
The destruction of node then concentrates on 3 precast beam light plate end and bolted connection positions, compared with cast-in-place concrete node, destroys
Position obtains outer shifting, meets the principle of " strong column and weak beam ".
Fig. 5 and Fig. 6 simulates cast-in-place concrete node, precast concrete node for being respectively by finite element software ABAQUS
Hysteresis loop, from Fig. 5 and Fig. 6, compared with cast-in-place concrete node, the bearing power increase of prefabricated node 28.22%,
Equivalent damping coefficient improves 58.86%, and both displacement ductility meansigma methodss are all higher than 3, meets armored concrete knot
The requirement more than 2.57 of the structure displacement ductility.
Illustrate that precast concrete node, while improving bearing capacity, maintains preferable ductility, and waters after node
District uses engineered cementitious based composites ECC to pour, and node region is strengthened, carried by the most pre-buried square steel tube 1
The high power consumption of node, meets the design principle of " strong node, weak component ".
By finite element software ABAQUS simulation the main casting area of precast concrete node in casting concrete C60 layer, water
Build the tension damage factor of ECC layer, in main casting area, pour ECC layer and the precast concrete node of casting concrete C60 layer
Failure mode is close, and damage is all concentrated mainly on bolt link position, pours face and beam light plate end, when pouring material is
During concrete C60, Joint Damage degree is substantially serious than the Joint Damage pouring engineered cementitious based composites ECC.
Fig. 7 is to pour ECC layer in finite element software ABAQUS simulates the main casting area of precast concrete node and pour mixed
The load-displacement skeleton curve of solidifying soil C60 layer.
Table 1 is the node diagnostic amount contrast watering material ECC layer and concrete C60 layer in main casting area:
Characteristic values of specimen with different late-pouring
material
Table 1
From fig.7, it can be seen that the initial stiffness of the node skeleton curve of casting concrete C60 is more slightly larger than the node pouring ECC,
This is because the matrix of engineered cementitious based composites ECC does not comprise coarse aggregate, simultaneously in order to guarantee to give full play to
Tensile strain-the hardening effect of material, in its matrix, particle diameter and the content of sand are also restricted, and this drops to a certain extent
The low rigidity of ECC, additionally, due to be mixed with PVA fiber, makes the porosity of matrix increase, and homogeneity reduces, and this also result in
The elastic modelling quantity of ECC is lower than normal concrete, thus the initial stiffness of ECC node skeleton curve is than concrete C60 node
Low.
Additionally, the skeleton curve of contrast ECC node and concrete C60 node is it is recognized that while two kinds of nodes are afforded
Peak load is more or less the same, but deformability has obvious difference, table 1 to list two kinds pours the main of material lower node
Characteristic quantity, it can be seen that the yield displacement of ECC node and extreme displacement are all big than concrete C60 node, its average displacement
Ductility factor, compared with concrete C60 node, improves 8.16%, and after reaching peak load, ECC node skeleton curve
Declining slower, this is due to after node curve enters descending branch, and along with crack constantly extends, the PVA fiber in ECC plays
Action of crack arrest start substantially, cause load curve to decline slowly, its peak strain is significantly greater than normal concrete, the most high-strength
The ECC limit stretching strain of degree is up to about 3%, and this shows that PVA fiber can significantly improve the plastic deformation ability of ECC matrix,
And due to the increase of plastic deformation ability, the energy-dissipating property of node increases the most accordingly, as shown in Table 1, same to concrete
C60 node is compared, and the Equivalent damping coefficient of ECC node improves 21.26%.
Therefore, when the main casting area of precast concrete node uses engineered cementitious based composites ECC, resisting of node
Shock stability and injury resistant ability all increase, and then for repairing the expense of node after reducing shake, and when configuring ECC,
Available industrial waste flyash replace about 50% cement somehow, it is achieved recycling utilizes, additionally, the density of ECC
Very well, in normal conditions of use, component surface can not ftracture, and effectively prevents harmful substance inside construction material
Infiltration, improve the durability of component, then extend the service life of structure.
Comprehensive society, economy, environment three elements account for, and use ECC material ratio to use normal concrete to there are about 37%
Cost advantage, thus for the joint form in the present invention, use ECC to meet safety as the material that pours of main casting area
Property, the suitability, durability and the structure design function requirement of economy.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described.The technical staff of the industry should
Understanding, above-described embodiment limits the present invention the most in any form, and the mode of all employing equivalents or equivalent transformation is obtained
Technical scheme, all falls within protection scope of the present invention.
Claims (7)
1. the precast concrete node pouring ECC layer, it is characterised in that include square steel tube, precast beam, prefabricated post；Described
Precast beam and prefabricated post are the outer ring being arranged on framework of steel reinforcement that some stirrups are coaxial and are parallel to each other, and described square steel tube is coaxially indulged
To being built in prefabricated post, the both sides longitudinal terminal surface of described square steel tube being respectively equipped with steel plate 1, the transverse end of described steel plate 1 connects
Being built in after the steel plate 2 of precast beam, described steel plate 1 and steel plate 2 connect and be in same longitudinal surface, described square steel tube lateral surface is with pre-
Between post processed, between steel plate 2, between steel plate 1, the region of composition constitutes main casting area, pours engineering in described main casting area
Cement-base composite material ECC layer.
A kind of precast concrete node pouring ECC layer the most according to claim 1, it is characterised in that described square steel tube
Outer ring be provided with transverse steel skeleton.
A kind of precast concrete node pouring ECC layer the most according to claim 1, it is characterised in that described steel plate 2 with
Inside the two of precast beam, longitudinal surface is fixing connects.
A kind of precast concrete node pouring ECC layer the most according to claim 1, it is characterised in that described square steel tube
Interior casting concrete layer.
A kind of precast concrete node pouring ECC layer the most according to claim 1, it is characterised in that described precast beam
Interior after-pouring concrete layer or engineered cementitious based composites ECC layer.
A kind of precast concrete node pouring ECC layer the most according to claim 1, it is characterised in that described prefabricated post
Interior after-pouring concrete layer or engineered cementitious based composites ECC layer.
A kind of precast concrete node pouring ECC layer the most according to claim 1, it is characterised in that described steel plate 1 He
Steel plate 2 is bolted.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549820.5A CN106193288B (en) | 2016-07-13 | 2016-07-13 | A kind of precast concrete node pouring ECC layers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549820.5A CN106193288B (en) | 2016-07-13 | 2016-07-13 | A kind of precast concrete node pouring ECC layers |
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| CN106193288A true CN106193288A (en) | 2016-12-07 |
| CN106193288B CN106193288B (en) | 2019-08-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605103A (en) * | 2017-10-08 | 2018-01-19 | 华东交通大学 | A kind of FRP tendons reinforcing bar composite strengthening ECC/ concrete combination columns |
| CN109853727A (en) * | 2018-12-29 | 2019-06-07 | 华南理工大学 | Recoverable function steel bar concrete frame energy dissipation node |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2758208B2 (en) * | 1989-05-31 | 1998-05-28 | 大成建設株式会社 | Joint method between column and steel reinforced concrete beam |
| CN201605670U (en) * | 2010-03-12 | 2010-10-13 | 张剑 | Rigid connection node of concrete-filled tubular column and reinforced concrete beam |
| CN103774754A (en) * | 2014-01-07 | 2014-05-07 | 同济大学 | Prefabricated ECC-RC combination beam column joint component |
| CN103953124A (en) * | 2014-05-15 | 2014-07-30 | 苏州工业园区设计研究院股份有限公司 | Section-steel concrete beam and ordinary concrete column nodal region structure |
| KR101451167B1 (en) * | 2013-07-26 | 2014-10-15 | 한국교통대학교산학협력단 | Hollowed Precast reinforced concrete Assembly And Connecting Method Thereof |
| CN104499568A (en) * | 2014-12-19 | 2015-04-08 | 东南大学 | Square steel pipe fabricated column-prefabricated superposed beam integrally-fabricated frame and construction method |
-
2016
- 2016-07-13 CN CN201610549820.5A patent/CN106193288B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2758208B2 (en) * | 1989-05-31 | 1998-05-28 | 大成建設株式会社 | Joint method between column and steel reinforced concrete beam |
| CN201605670U (en) * | 2010-03-12 | 2010-10-13 | 张剑 | Rigid connection node of concrete-filled tubular column and reinforced concrete beam |
| KR101451167B1 (en) * | 2013-07-26 | 2014-10-15 | 한국교통대학교산학협력단 | Hollowed Precast reinforced concrete Assembly And Connecting Method Thereof |
| CN103774754A (en) * | 2014-01-07 | 2014-05-07 | 同济大学 | Prefabricated ECC-RC combination beam column joint component |
| CN103953124A (en) * | 2014-05-15 | 2014-07-30 | 苏州工业园区设计研究院股份有限公司 | Section-steel concrete beam and ordinary concrete column nodal region structure |
| CN104499568A (en) * | 2014-12-19 | 2015-04-08 | 东南大学 | Square steel pipe fabricated column-prefabricated superposed beam integrally-fabricated frame and construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605103A (en) * | 2017-10-08 | 2018-01-19 | 华东交通大学 | A kind of FRP tendons reinforcing bar composite strengthening ECC/ concrete combination columns |
| CN109853727A (en) * | 2018-12-29 | 2019-06-07 | 华南理工大学 | Recoverable function steel bar concrete frame energy dissipation node |
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| Publication number | Publication date |
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| CN106193288B (en) | 2019-08-16 |
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Effective date of registration: 20190625 Address after: Jiangsu province Nantong City sik Road No. 9 Applicant after: Nantong University Applicant after: Jiangsu Zhongnan Construction Industry Group Co., Ltd. Address before: 226124 north of Changle Town, Haimen, Nantong, Jiangsu Applicant before: Jiangsu Zhongnan Construction Industry Group Co., Ltd. |
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