CN102587578A - High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof - Google Patents
High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof Download PDFInfo
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Abstract
本发明是高强钢筋增强ECC-空心钢管UHPC组合柱构件及其制作方法，尤其适用于高层、重载、大跨度结构的墩柱构件领域。该构件包括ECC材料、浇筑在ECC材料内的钢筋骨架、钢管、浇注于钢管内壁的超高性能混凝土及空腔；本发明不仅整合了ECC材料、高强钢筋和空心钢管超高性能混凝土的优点，使得各自的优点得以充分发挥，而且较好解决了钢管和钢筋的锈蚀问题，有效提高了构件的耐久性，延长了构件的生命周期，降低了后期养护、维修及加固成本；并且该构件具有较强的承载力、延性、抗震性及抗疲劳性。本发明采用部分预制生产、部分现场浇注的施工方法，不仅有利于构件质量的保证，而且预制部分可直接作为承力构件支撑上部结构的施工，有利于加快施工速度，缩短建设周期。
The invention is a high-strength steel reinforced ECC-hollow steel pipe UHPC composite column component and a manufacturing method thereof, and is especially suitable for the field of pier column components of high-rise, heavy-load, and long-span structures. The component includes ECC material, steel skeleton poured in ECC material, steel pipe, ultra-high performance concrete poured in the inner wall of steel pipe and cavity; the invention not only integrates the advantages of ECC material, high-strength steel bar and hollow steel pipe ultra-high performance concrete, The respective advantages can be fully utilized, and the corrosion problem of steel pipes and steel bars is better solved, the durability of the components is effectively improved, the life cycle of the components is prolonged, and the cost of later maintenance, repair and reinforcement is reduced; Strong bearing capacity, ductility, shock resistance and fatigue resistance. The invention adopts the construction method of partly prefabricated production and partly poured on site, which is not only beneficial to the guarantee of component quality, but also the prefabricated part can be directly used as a load-bearing component to support the construction of the upper structure, which is beneficial to speed up the construction speed and shorten the construction period.
Description
Technical field
The present invention is that high tensile reinforcement strengthens ECC-hollow steel pipe UHPC coupled column member and preparation method, is particularly useful for high level, heavy duty, large span pier stud member field.
Background technology
Superhigh tenacity fiber reinforced cement-based composite material (Engineered Cementitious Composites; Be called for short ECC) be through removing coarse aggregate; Optimize the key property of matrix, fiber and fiber and basal body interface and the interaction between the three, make it to have high cracking resistance, a kind of novel concrete based composites of high tenacity, high energy absorption capability.The limit compressive strain of ECC material can reach 0.5%-0.7%, is about 3 times of ordinary concrete; Ultimate tensile strength can reach more than 3%, is more than 300 times of ordinary concrete; Especially outstanding is its crack dispersibility, and fracture interval 1～2mm during ultimate tensile strength, average crack width can be controlled in the 100 μ m, is far smaller than the maximum crack of the concrete limit value of stipulating in the at present domestic and international standard.Because tensile property, the microscopic checks dispersibility of brilliance and good high energy absorption capability that the ECC material is superior; Therefore this material has effect significantly to improving durability of structures, and being specially adapted to has crack arrest, resistance to split requirement and the abominable Structural Engineering field of environment of living in to structure.
Ultra-high performance concrete (Ultra High Performance Concrete is called for short UHPC) is claimed RPC (Reactive Powder Concrete is abbreviated as RPC) again.Because the difference of its preparation, construction technology; Its mechanical property and deformability all obviously are superior to ordinary concrete and high-strength concrete, comprise based on the maximum density theory, remove coarse aggregate; The fineness that improves component is with active, so that reduce material internal defect to greatest extent; Mix steel fibre, increase toughness; Use high efficiency water reducing agent, reduce water-cement ratio and porosity; The high temperature maintenance, the hydration rate of promotion cementitious material and degree of hydration etc.Ultra-high performance concrete is to have superhigh intensity, and its compressive strength has high tenacity, high-durability, high crack-resistant, shrinkage and creep is little and good characteristic such as good volume stability simultaneously between 150～300Mpa.
High tensile reinforcement is 400MPa, 500MPa level hot rolled ribbed steel bar in the representative of China; Have that intensity height, good-extensibility, solderability and plasticity are good, the intensity price is than advantage such as high, that safety stock is big, shock resistance is good; Can give full play to its performance with the use of ECC material fit, be particularly useful for the beam column member of heavy duty, large-span structure.Adopt high-strength steel influential point of tendons to bring good economical, societal benefits; Promote the scientific and technological progress of builing industry; And can practice thrift expenses such as a large amount of energy, electric power, transportation and processing, and reduce the discharging of flue gas, dust and pollutant, promote the reinforcing bar updating and upgrading of a product, reduce resource consumption, Push Technology progress; The theory that meets environmental protection and sustainable development, but owing to reasons such as promotion efficiency is not enough, achievement in research is immature are used less at home.
Reinforced concrete post is in the face of heavy duty, large-span structure the time; Have following defective: because the intensity of concrete and reinforcing bar is all lower, in high level, large-span structure, load is bigger; The method of only reliable increase column cross-section size and arrangement of reinforcement improves its bearing capacity; Not only cause the very big loss of material, increase building costs and difficulty of construction, and seriously compressed space capable of using; Concrete material tensile strength is low, and ftracture in the tensile region under lower load, and the crack is with the major fracture form appearance of broad; The excessive post rigidity that not only causes in crack reduces; And the easy corrosion of inner reinforcing bar, bearing capacity and durability reduce, and be difficult in maintenance in the future and maintenance cost is big.If adopt high tensile reinforcement, then because concrete limit compressive strain is less, high tensile reinforcement not surrender as yet can't be given full play to the effect of high tensile reinforcement, and cause member ductility wretched insufficiency when concrete is crushed, and the brittle fracture of sign can occur not having.
Steel core concrete column, no matter which kind of concrete inside adopts, and comprises the UHPC material; All can partly avoid above-mentioned defective, but the common humid environment of the residing substructure of pillar, impedance dielectric is more; And steel pipe is corroded easily; The maintain and replace difficulty in case go wrong, and regular maintenance is frequent, and maintenance cost is big.
Summary of the invention
The objective of the invention is to overcome the above-mentioned defective of steel concrete and steel core concrete column member, provide a kind of high tensile reinforcement to strengthen ECC-hollow steel pipe UHPC coupled column member.UHPC material compressive strength can reach 150～300Mpa, and steel pipe is to the hoop constraint of its formation in addition, and its compressive strength more can be doubled and redoubled, so steel pipe UHPC has high bearing capacity.The ductility of two kinds of materials is all better, and hollow structure has then been practiced thrift material when increasing member bending resistance, stability, and helps the high temperature maintenance of UHPC material; As for the anticorrosive problem of steel pipe, then protect by being wrapped in its outer ECC material; The built-in high tensile reinforcement of ECC material has not only further significantly increased bearing of component, has given full play to the superiority of several kinds of high performance materials; And the remarkable microscopic checks dispersibility of ECC material has guaranteed that the crack that member produces is harmless crack; The difficult component inside of invading of outside impedance dielectric, corrosion can not take place in steel pipe and high tensile reinforcement, and the durability of member has reliable assurance; Therefore the later maintenance expense significantly reduces, and life cycle is greatly improved.This member has advantages such as good ductility, fatigue resistance and anti-seismic performance in addition.
To achieve these goals, the present invention has taked following technical scheme:
The present invention includes ECC material 1, be cast in cage of reinforcement, steel pipe 4, the UHPC material 5 that is cast in the steel pipe inwall and cavity 6 in the ECC material; Described cage of reinforcement is made up of longitudinal reinforcement 2 and stirrup 3, and stirrup 3 places the outside of longitudinal reinforcement 2, forms the closed ring of restriction longitudinal reinforcement 2 displacements; Leave cavity 6 in the middle of the member; Described longitudinal reinforcement 2 and stirrup 3 all adopt high tensile reinforcement.
Described high tensile reinforcement is meant yield strength 500MPa and above reinforcing bar;
Described ECC material 1 is the superhigh tenacity fiber reinforced cement-based composite material;
Described UHPC material 5 is compressive strength 150Mpa and the above ultra-high performance concrete that mixes or do not mix steel fibre;
The cross sectional shape of described steel pipe 4 is circular, and it is uniform section or variable cross-section straight tube along its length;
Described cavity 6 adopts circular cross-section, and with steel pipe 4 coaxial arrangement, and its cross section is consistent with steel pipe 4 along the column length variation tendency;
The outer cross sectional shape of said member comprises circle, rectangle and polygon.
Making step of the present invention is following:
1) steel pipe being carried out type selecting makes;
2) adopt centrifugal molding process that the UHPC material is cast in steel pipe internal-surface;
3) pour out slip unnecessary in the steel pipe after the moulding, stream curing is 48 hours in 90 ℃, the environment of relative humidity 90%;
4) maintenance is good steel pipe UHPC is in place in engineering structures;
5), and assemble exterior sheathing by working drawing and put in place at the peripheral assembling reinforcement skeleton of mounted steel pipe UHPC;
6) cast ECC material, and maintenance is removed exterior sheathing then to the stipulated time.
High tensile reinforcement strengthens the advantage that ECC-hollow steel pipe UHPC coupled column member has not only been integrated ECC material, high tensile reinforcement and hollow steel pipe UHPC; Make advantage separately be able to give full play to; And efficiently solve the relatively poor problem of conventional component durability property, mainly contain following advantage:
Steel pipe and UHPC combination make the high compressive strength of UHPC material in the post member, be able to give full play to, and the hoop constraint of steel pipe makes bearing of component be able to be doubled and redoubled especially;
Hollow structure has improved the bending rigidity of member, has increased member pressurized stability; Help the use of centrifugal molding process, issuable honeycomb defective when having avoided direct cast helps the high temperature maintenance of UHPC material, makes the prefabricated quality of member that good guarantee arranged;
ECC material and high tensile reinforcement have further strengthened bearing of component, have improved the ductility of member, make the durability of member obtain good assurance;
Can utilize mounted precast hollow steel pipe UHPC to do the construction that load-carrying member carries out superstructure during construction earlier; Peripheral ECC material and the cage of reinforcement of steel pipe can be poured into a mould in the later stage; Also can parallel construction with superstructure, help accelerating speed of application, shorten the construction period;
This member has good ductility, shock resistance and fatigue resistance in addition;
Description of drawings
Fig. 1 is that circular high tensile reinforcement strengthens ECC-hollow steel pipe UHPC coupled column member cross sectional representation;
Fig. 2 strengthens ECC-hollow steel pipe UHPC coupled column member cross sectional representation for the rectangle high tensile reinforcement;
Fig. 3 strengthens ECC-hollow steel pipe UHPC coupled column member cross sectional representation for the hexagon high tensile reinforcement;
Among the figure: 1, ECC material, 2, longitudinal reinforcement, 3, stirrup, 4, steel pipe, 5, the UHPC material, 6, cavity.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.
As shown in the figure, the manufacturing process of member is following:
At first steel pipe 1 is carried out type selecting and make, adopt centrifugal molding process that UHPC material 5 is cast in steel pipe 1 inner surface then, pour out slip unnecessary in the steel pipe 1 after the moulding, stream curing stored for future use after 48 hours in 90 ℃, the environment of relative humidity 90%; During engineering construction prefabricated hollow steel pipe UHPC is pressed the construction drawing installation in position, the assembling reinforcement by drawing in its periphery then, and assembling exterior sheathing, cast ECC material 1 is removed exterior sheathing after maintenance to the stipulated time.
Need to prove, can be used as the construction that load-carrying member carries out superstructure behind the prefabricated hollow steel pipe UHPC installation in position, cage of reinforcement can be in later stage or parallel construction with superstructure with the ECC material.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. a high tensile reinforcement strengthens ECC-hollow steel pipe UHPC coupled column member and preparation method, it is characterized in that: comprise ECC material (1), be cast in cage of reinforcement, steel pipe (4), the UHPC material (5) that is cast in the steel pipe inwall and cavity (6) in the ECC material; Described cage of reinforcement is made up of longitudinal reinforcement (2) and stirrup (3), and stirrup (3) places the outside of longitudinal reinforcement (2), forms the closed ring of restriction longitudinal reinforcement (2) displacement; Leave cavity (6) in the middle of the member; Described longitudinal reinforcement (2) and stirrup (3) all adopt high tensile reinforcement;
Described high tensile reinforcement is meant yield strength 500MPa and above reinforcing bar;
Described UHPC material (5) is compressive strength 150Mpa and the above ultra-high performance concrete that mixes or do not mix steel fibre.
2. a kind of high tensile reinforcement according to claim 1 strengthens ECC-hollow steel pipe UHPC coupled column member and preparation method, it is characterized in that: the cross sectional shape of described steel pipe (4) is for circular, and it is uniform section or variable cross-section straight tube along its length.
3. a kind of high tensile reinforcement according to claim 1 strengthens ECC-hollow steel pipe UHPC coupled column member and preparation method; It is characterized in that: described cavity (6) adopts circular cross-section; With steel pipe (4) coaxial arrangement, and its cross section is consistent along the same steel pipe of column length variation tendency (4).
4. a kind of high tensile reinforcement according to claim 1 strengthens ECC-hollow steel pipe UHPC coupled column member and preparation method, and it is characterized in that: the outer cross sectional shape of said member comprises circle, rectangle and polygon.
5. a kind of high tensile reinforcement according to claim 1 strengthens ECC-hollow steel pipe UHPC coupled column member and preparation method, and it is characterized in that: hollow steel pipe UHPC partly adopts centrifuging process pre-formed, outsourcing ECC and the moulding of cage of reinforcement part site operation.
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| CN2012100747631A CN102587578A (en) | 2012-03-21 | 2012-03-21 | High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775565A (en) * | 2015-03-30 | 2015-07-15 | 东南大学 | Steel bar reinforced ECC-steel pipe concrete composite column |
| CN105603870A (en) * | 2016-02-26 | 2016-05-25 | 东南大学 | Pier energy-consuming and crush prevention structure internally provided with energy-consuming rebars and sticky elastic material layers |
| CN107542225A (en) * | 2017-09-30 | 2018-01-05 | 江苏联禹智能工程有限公司 | A kind of special enhancing tubing of intelligent building engineering |
| CN108797320A (en) * | 2018-07-25 | 2018-11-13 | 重庆大学 | A kind of the UHPC pipes-concrete prefabricated assembling combination bridge pier and its construction method of spigot-and-socket joint |
| CN110016993A (en) * | 2019-04-28 | 2019-07-16 | 熊福军 | A kind of concrete steel structural upright |
| CN110042748A (en) * | 2019-05-29 | 2019-07-23 | 福州大学 | A kind of UHPC box SRC arch bridge rod structure and its construction method |
| CN113152775A (en) * | 2021-04-06 | 2021-07-23 | 华南理工大学 | ECC-reinforced steel thin-wall structure and preparation method thereof |
| CN113309293A (en) * | 2021-06-07 | 2021-08-27 | 四川大学 | Compound muscle reinforcing ECC-cross stiffening rib square steel tube hollow column |
| CN113323150A (en) * | 2021-06-07 | 2021-08-31 | 四川大学 | Compound muscle reinforcing ECC-compound square steel tube hollow column |
| CN114622685A (en) * | 2022-03-05 | 2022-06-14 | 福建工程学院 | A prefabricated UHPC-steel-UHPC tubular concrete composite column and construction method thereof |
| CN115522686A (en) * | 2022-10-11 | 2022-12-27 | 暨南大学 | FRP anti-slip composite pipe constrained seawater sea sand concrete column and its construction method |
| CN116733169A (en) * | 2023-07-20 | 2023-09-12 | 西安建筑科技大学 | FRP stirrup restrained UHPC-steel pipe composite column component and its manufacturing method |
| CN117513642A (en) * | 2023-12-18 | 2024-02-06 | 江苏海洋大学 | A kind of prefabricated UHPC-HPC combined hollow thin-walled component and its production method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110016993A (en) * | 2019-04-28 | 2019-07-16 | 熊福军 | A kind of concrete steel structural upright |
| CN110042748A (en) * | 2019-05-29 | 2019-07-23 | 福州大学 | A kind of UHPC box SRC arch bridge rod structure and its construction method |
| CN113152775A (en) * | 2021-04-06 | 2021-07-23 | 华南理工大学 | ECC-reinforced steel thin-wall structure and preparation method thereof |
| CN113309293A (en) * | 2021-06-07 | 2021-08-27 | 四川大学 | Compound muscle reinforcing ECC-cross stiffening rib square steel tube hollow column |
| CN113323150A (en) * | 2021-06-07 | 2021-08-31 | 四川大学 | Compound muscle reinforcing ECC-compound square steel tube hollow column |
| CN114622685A (en) * | 2022-03-05 | 2022-06-14 | 福建工程学院 | A prefabricated UHPC-steel-UHPC tubular concrete composite column and construction method thereof |
| CN114622685B (en) * | 2022-03-05 | 2024-03-01 | 福建工程学院 | Prefabricated UHPC-steel-UHPC pipe concrete composite column and construction method thereof |
| CN115522686A (en) * | 2022-10-11 | 2022-12-27 | 暨南大学 | FRP anti-slip composite pipe constrained seawater sea sand concrete column and its construction method |
| CN116733169A (en) * | 2023-07-20 | 2023-09-12 | 西安建筑科技大学 | FRP stirrup restrained UHPC-steel pipe composite column component and its manufacturing method |
| CN117513642A (en) * | 2023-12-18 | 2024-02-06 | 江苏海洋大学 | A kind of prefabricated UHPC-HPC combined hollow thin-walled component and its production method |
| CN117513642B (en) * | 2023-12-18 | 2024-08-02 | 江苏海洋大学 | Prefabricated UHPC-HPC combined hollow thin-walled component and manufacturing method |
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Application publication date: 20120718 |