CN211775115U - Steel pipe mixed concrete composite structure - Google Patents
Steel pipe mixed concrete composite structure Download PDFInfo
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- CN211775115U CN211775115U CN201921927269.9U CN201921927269U CN211775115U CN 211775115 U CN211775115 U CN 211775115U CN 201921927269 U CN201921927269 U CN 201921927269U CN 211775115 U CN211775115 U CN 211775115U
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Abstract
The utility model provides a steel pipe hybrid concrete integrated configuration, including the steel pipe, ordinary concrete, compound pipe and sea water sea sand concrete, many compound pipes are arranged inside the cross-section of steel pipe, the axis of compound pipe is parallel to each other with the axis of steel pipe, sea water sea sand concrete fills and is full of inside the cross-section of each compound pipe, the ordinary concrete of packing is pour in the space between compound pipe and the steel pipe, sea water sea sand concrete and ordinary concrete are kept apart to the compound pipe, provide the protection for resisting chlorine ion corrosion, it is possible to provide the configuration reinforcing bar in the ordinary concrete of outside simultaneously, compound pipe and steel pipe provide inside and outside twice restraint for sea water sea sand concrete, the mechanical properties of sea water sea sand concrete has been improved by a wide margin, when reaching the application effect of normal ordinary concrete, the utilization of sea water sea sand resources has been realized, have far-reaching great prospect.
Description
Technical Field
The utility model belongs to the civil engineering field relates to a compound steel pipe concrete component, specifically is a steel pipe mixed concrete integrated configuration.
Background
The steel pipe concrete has the advantages of high strength, light dead weight, large section bending rigidity, corrosion resistance, good fireproof performance and the like, can be used as a template of internal concrete, and has good mechanical properties, so the steel pipe concrete is widely applied to building engineering, particularly high-rise building construction. However, with the development of the times, resources are more and more scarce, particularly, building river sand is more and more deficient, sea sand resources are rich, but sea sand is high in chloride ion content and has strong corrosivity on steel, and the sea sand cannot be simply applied to traditional structures such as concrete-filled steel tubes and the like. Meanwhile, the steel pipe concrete is easy to generate local buckling under the load effect, and the bearing effect of the steel pipe concrete is reduced.
Currently, different technologies are developed for resource utilization of sea sand resources and improvement of the stress performance of concrete filled steel tubes. For example, chinese patent No. 201910036888.7 discloses a sea water sea sand concrete column, which is composed of FRP-steel composite ribs, polyethylene pipes and sea water sea sand concrete, wherein a plurality of FRP-steel composite ribs are vertically arranged in the polyethylene pipes, the polyethylene pipes restrain the sea water sea sand concrete filled in the pipes, the method utilizes the FRP-steel composite ribs as structural reinforcing bars, thereby avoiding the problem of corrosion of the reinforcing bars, but the FRP-steel composite ribs have application problems such as bending and connection, and the outside is restrained only by the polyethylene pipes, so that the effect is limited, and the column is fireproof and has poor high temperature resistance. In order to improve the stress performance of the steel tube concrete, the Chinese patent No. 201811400216.1 discloses a steel tube concrete column, the structure comprises an inner steel tube, an outer steel tube, a connecting plate between the inner steel tube and the outer steel tube and concrete between the inner steel tube and the outer steel tube, the structure improves the bearing capacity of the structure, but the existence of the connecting plate improves the self weight and the material consumption of the structure, is not beneficial to saving the cost and construction operation, and is not suitable for the utilization of sea sand resources due to the corrosion of the steel tubes; for another example, chinese patent No. 201810706163.X discloses a novel reinforced hollow steel pipe high-strength concrete column, which includes a steel pipe, a circular prestressed high-strength concrete pipe column placed inside the steel pipe, and concrete filled between the steel pipe and the circular prestressed high-strength concrete pipe column.
In conclusion, the existing steel pipe concrete structure is lack of an effective way for directly utilizing sea sand resources because the steel pipe is corroded by chloride ions.
Disclosure of Invention
The utility model aims at providing a steel pipe mixes concrete composite construction. And filling the composite pipe with seawater sea sand concrete to form a combined structure, embedding the composite pipe seawater sea sand concrete member into the steel pipe concrete, and enabling the composite pipe seawater sea sand concrete member to be stressed together with the steel pipe concrete to form a steel pipe concrete structure with the built-in composite pipe seawater sea sand concrete. The utility model discloses the structure is on keeping the original characteristic basis of steel pipe concrete, and the restraint effect of make full use of composite pipe to sea water sea sand concrete has improved the whole atress performance of steel pipe concrete structure, has avoided the erosion of harmful chloride ion to the steel pipe in the sea water sea sand concrete simultaneously, simple structure, the abundant sea water sea sand resource of make full use of environmental protection, and the feature of environmental protection is good, has wide application prospect.
The technical scheme of the utility model: the utility model provides a steel pipe hybrid concrete integrated configuration, including steel pipe, ordinary concrete, compound pipe, sea water sea sand concrete. The composite pipe and the steel pipe are hollow, seawater sea sand concrete is poured in the composite pipe, ordinary concrete is poured in a gap between the composite pipe and the steel pipe, and the reinforced steel pipe concrete structure is formed by maintaining after pouring is finished.
The utility model provides a steel pipe hybrid concrete integrated configuration, a serial communication port includes the steel pipe, ordinary concrete, compound pipe and sea water sea sand concrete, many compound pipe arrange inside the cross-section of steel pipe, the axis of compound pipe is parallel to each other with the axis of steel pipe, sea water sea sand concrete fills inside being full of the cross-section of each compound pipe, fill ordinary concrete is pour in the space between compound pipe and the steel pipe, compound pipe is the FRP pipe, FRP sandwich steel pipe, cover one kind in steel pipe and the PVC pipe in the FRP, sea water sea sand concrete and ordinary concrete are kept apart to compound pipe, the sectional area that compound pipe and sea water sea sand concrete are constituteed is not less than 20% of whole structure sectional area, the thinnest department thickness of ordinary concrete is not less than 30 mm.
Longitudinal ribs are arranged in the common concrete, bear pressure together with the steel pipes, bear eccentric bending moment possibly generated and tensile stress caused by concrete shrinkage and temperature change, and reduce creep deformation of the concrete; the stirrups are arranged perpendicular to the longitudinal bars, so that the longitudinal steel bars can be prevented from being pressed and bent after being stressed, the position of the longitudinal steel bars can be fixed, the brittleness of component damage is improved, concrete in the core can be restrained when the stirrups are densely arranged, and the stress performance of the stirrups is improved.
A plurality of composite pipes are arranged in the steel pipe, the positions of the composite pipes in the section of the steel pipe are random, and the composite pipes are arranged to form various uniform and non-uniform modes.
The FRP sandwich steel pipe is composed of an inner layer FRP, an inner steel pipe and an outer layer FRP from inside to outside, the FRP inner covering steel pipe is composed of the inner layer FRP and the inner steel pipe from inside to outside, so that the contact surfaces of the FRP pipe, the FRP sandwich steel pipe and the FRP inner covering steel pipe and seawater sea sand concrete are all made of corrosion-resistant FRP materials, harmful chloride ions of the seawater sea sand concrete are isolated, and the corrosion influence of the FRP inner covering steel pipe on external common concrete, the steel pipe and steel bars is avoided.
The seawater sea sand concrete is cast in place or is cast in advance to fill the inside of the section of the composite pipe, a prefabricated composite pipe seawater sea sand concrete component is formed by casting in advance, and when the prefabricated composite pipe seawater sea sand concrete component is adopted, the structural forming is combined with prefabrication and cast-in-place into a whole, so that the workload of the cast-in-place concrete is further reduced.
Compared with other steel pipe concrete members, the utility model discloses there is following advantage:
(1) the inner wall of the composite pipe provides protection for resisting chloride ion corrosion, and the composite pipe provides an isolation barrier between seawater sea sand concrete and common concrete, and provides possibility for arranging reinforcing steel bars in the common concrete outside.
(2) The sectional area formed by the composite pipe and the seawater and sea sand concrete is not less than 20% of the sectional area of the whole structure, so that the effect of recycling seawater and sea sand is ensured.
(3) The composite pipe provides the 1 st restraint for the seawater sea sand concrete, the external steel pipe provides the 2 nd restraint for the seawater sea sand concrete, and the internal and external restraints greatly improve the mechanical property of the seawater sea sand concrete.
(4) The seawater sea sand concrete is cast in place or cast in advance to fill the inside of the section of the composite pipe, and the prefabricated composite pipe seawater sea sand concrete component is formed by casting in advance, so that the cast-in-place time is shortened, and the assembly development of the structure is facilitated.
(5) The common concrete is poured on the periphery of the composite pipe seawater sea sand concrete, the thickness of the thinnest part of the common concrete is not less than 30mm, a 2 nd isolation barrier is provided between chloride ions in the seawater sea sand concrete and the external use environment, and the application effect of the normal common concrete is realized.
The utility model discloses an environment-friendly sea water sea sand concrete is favorable to resource saving and sustainable development. At present, the demand of important raw material sand for concrete is higher and higher, the supply is more and more tense, the coast line of China is long, the reserve amount of seawater and sea sand is large, the seawater and the sea sand are prepared into concrete for use, the concrete meets the resource saving and environment-friendly development route of China, and has a far-reaching prospect.
Drawings
FIG. 1: a steel tube and concrete mixed combined structure is characterized in that a structural three-dimensional schematic diagram is shown when composite tubes are concentrically arranged inside a round steel tube on the outer layer in a single form;
FIG. 2: a steel pipe and concrete mixed combined structure is characterized in that a structural cross section schematic diagram is shown when composite pipes are concentrically arranged inside a circular steel pipe on an outer layer in a single form;
FIG. 3: a steel pipe and concrete mixed combined structure is characterized in that a composite pipe is eccentrically arranged inside a round steel pipe at the outer layer in a single form, and the structure is in a three-dimensional schematic view;
FIG. 4: a steel pipe and concrete mixed combined structure is characterized in that a structural cross section schematic diagram is shown when a composite pipe is eccentrically arranged inside a circular steel pipe at an outer layer in a single form;
FIG. 5: a steel pipe and concrete mixed combined structure is characterized in that a structure is in a three-dimensional schematic view when composite pipes are uniformly arranged inside a round steel pipe on an outer layer in a multi-root mode;
FIG. 6: a steel pipe and concrete mixed combined structure is characterized in that a structural cross section schematic diagram is shown when composite pipes are uniformly arranged inside a circular steel pipe on an outer layer in a multi-root mode;
FIG. 7: a steel pipe and concrete mixed combined structure is characterized in that a structure is in a three-dimensional schematic view when a composite pipe is eccentrically arranged in a steel pipe with an outer layer of a circular shape in a plurality of forms;
FIG. 8: a steel pipe and concrete mixed combined structure is characterized in that a structural cross section schematic diagram is shown when a composite pipe is eccentrically arranged in a steel pipe with a round outer layer in a plurality of forms;
FIG. 9: a steel tube mixed concrete combined structure is characterized in that composite tubes are concentrically arranged inside a round steel tube on the outer layer in a single form, and a structure is in a three-dimensional schematic view when longitudinal ribs are arranged in common concrete;
FIG. 10: a steel tube mixed concrete combined structure is characterized in that composite tubes are concentrically arranged inside a round steel tube on the outer layer in a single form, and the cross section of the structure is schematic when longitudinal ribs are arranged in common concrete;
FIG. 11: a steel tube mixed concrete combined structure is characterized in that a structure is in a three-dimensional schematic view when a composite tube is concentrically arranged inside a square steel tube on the outer layer in a single form;
FIG. 12: a steel pipe and concrete mixed combined structure is characterized in that a structural cross section schematic diagram is shown when a composite pipe is concentrically arranged inside a square steel pipe on the outer layer in a single form;
FIG. 13: a steel tube mixed concrete composite structure is characterized in that a composite tube is an FRP sandwich steel tube formed by an inner layer FRP, an inner steel tube and an outer layer FRP from inside to outside;
FIG. 14: a steel pipe and concrete mixed composite structure is characterized in that a composite pipe is an FRP (fiber reinforced plastic) inner-covered steel pipe consisting of an inner layer FRP and an inner steel pipe from inside to outside;
in the attached drawings, 1 is a steel pipe; 2 is common concrete; 3 is a composite pipe; 301 is inner FRP layer; 302 is an inner steel pipe; 303 outer FRP layer; 4 is seawater sea sand concrete; and 5 is a longitudinal rib.
The specific implementation mode is as follows:
in order to clearly understand the technical features, objects, and effects of the present invention, detailed descriptions of specific embodiments of the present invention will be given with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-2, a steel pipe and concrete mixed composite structure comprises a steel pipe 1, ordinary concrete 2, a composite pipe 3, and seawater and sea sand concrete 4. A compound pipe 3 distributes in the cross-section of steel pipe 1 is concentric, and inside the cross-section of compound pipe 3 was full of to sea water sea sand concrete 4, and the gap is poured and is filled ordinary concrete 2 between compound pipe 3 and the steel pipe 1, and steel pipe 1 is circular steel pipe, and steel pipe 1, ordinary concrete 2, compound pipe 3 and sea water sea sand concrete 4 form the integral unit through concrete placement bonding.
Example 2:
as shown in fig. 3-4, a steel pipe and concrete mixed composite structure comprises a steel pipe 1, ordinary concrete 2, a composite pipe 3, and seawater and sea sand concrete 4. A compound pipe 3 is eccentrically distributed in the inside of the section of a steel pipe 1, seawater sea sand concrete 4 is filled in the inside of the section of each compound pipe 3, common concrete 2 is poured and filled in a gap between each compound pipe 3 and the steel pipe 1, the steel pipe 1 is a circular steel pipe, and the steel pipe 1, the common concrete 2, the compound pipes 3 and the seawater sea sand concrete 4 are bonded through concrete pouring to form an integral component.
Example 3:
as shown in fig. 5-6, a steel pipe and concrete mixed composite structure comprises a steel pipe 1, ordinary concrete 2, a composite pipe 3 and seawater and sea sand concrete 4. Four composite pipe 3 evenly arrange inside steel pipe 1 cross-section, inside sea water sea sand concrete 4 was full of each composite pipe 3's cross-section, the gap was pour and is filled ordinary concrete 2 between composite pipe 3 and the steel pipe 1, and steel pipe 1 is circular shape steel pipe, and steel pipe 1, ordinary concrete 2, composite pipe 3, sea water sea sand concrete 4 form the integral unit through concrete placement bonding.
Example 4:
as shown in fig. 7-8, a steel pipe and concrete mixed composite structure comprises a steel pipe 1, ordinary concrete 2, a composite pipe 3 and seawater and sea sand concrete 4. Two compound pipes 3 are eccentrically arranged inside the section of a steel pipe 1, seawater sea sand concrete 4 is filled inside the section of each compound pipe 3, common concrete 2 is poured and filled in a gap between each compound pipe 3 and the steel pipe 1, the steel pipe 1 is a circular steel pipe, and the steel pipe 1, the common concrete 2, the compound pipes 3 and the seawater sea sand concrete 4 are bonded through concrete pouring to form an integral component.
Example 5:
as shown in fig. 9-10, a steel pipe and concrete mixed composite structure comprises a steel pipe 1, normal concrete 2, a composite pipe 3 and seawater and sea sand concrete 4. A compound pipe 3 is arranged inside the section of steel pipe 1 concentrically, and inside sea water sea sand concrete 4 was full of the section of each compound pipe 3, the gap was pour and is filled ordinary concrete 2 between compound pipe 3 and the steel pipe 1, evenly sets up vertical muscle 5 in the ordinary concrete 1, and steel pipe 1 is circular shape steel pipe, and steel pipe 1, ordinary concrete 2, compound pipe 3, sea water sea sand concrete 4 form the integral unit through the concrete placement bonding.
Example 6:
as shown in fig. 11-12, a steel pipe and concrete mixed composite structure comprises a steel pipe 1, normal concrete 2, a composite pipe 3, and seawater and sea sand concrete 4. A compound pipe 3 is arranged in the inside of steel pipe 1 cross-section concentrically, and inside the cross-section of each compound pipe 3 was filled with to sea water sea sand concrete 4, the ordinary concrete 2 of packing was pour in the space between compound pipe 3 and the steel pipe 1, and steel pipe 1 is square steel pipe, and steel pipe 1, ordinary concrete 2, compound pipe 3, sea water sea sand concrete 4 form the integral unit through the concrete placement bonding.
In the above embodiment, the composite pipe 3 is one of an FRP pipe, an FRP sandwich steel pipe, an FRP inner-covering steel pipe and a PVC pipe, the composite pipe 3 isolates the seawater sea sand concrete 4 from the ordinary concrete 2, the sectional area formed by the composite pipe 3 and the seawater sea sand concrete 4 is not less than 20% of the sectional area of the whole structure, and the thinnest part of the ordinary concrete 2 is not less than 30 mm.
The FRP sandwich steel pipe consists of an inner layer FRP 301, an inner steel pipe 302 and an outer layer FRP 303 from inside to outside, and the FRP inner covering steel pipe consists of the inner layer FRP 301 and the inner steel pipe 302 from inside to outside.
The seawater sea sand concrete 4 is cast in place or cast in advance to fill the inside of the section of the composite pipe 3, and the prefabricated composite pipe seawater sea sand concrete component is formed by casting in advance.
Claims (5)
1. A steel tube mixed concrete composite structure is characterized by comprising a steel tube (1), common concrete (2), composite tubes (3) and seawater sea sand concrete (4), wherein a plurality of composite tubes (3) are arranged inside the cross section of the steel tube (1), the axes of the composite tubes (3) are parallel to the axis of the steel tube (1), the seawater sea sand concrete (4) is filled inside the cross section of each composite tube (3), the common concrete (2) is poured and filled in a gap between each composite tube (3) and the steel tube (1), the composite tubes (3) are FRP tubes, one of FRP sandwich steel pipe, FRP inner cover steel pipe and PVC pipe, compound pipe (3) keep apart sea water sea sand concrete (4) and ordinary concrete (2), and the sectional area that compound pipe (3) and sea water sea sand concrete (4) are constituteed is not less than 20% of whole structure sectional area, and ordinary concrete (2) thinnest department thickness is not less than 30 mm.
2. A steel pipe and concrete composite structure as claimed in claim 1, wherein the general concrete (2) is provided with longitudinal bars (5) therein, and the stirrups are arranged perpendicularly to the longitudinal bars (5).
3. A steel pipe and concrete composite structure according to claim 1, wherein a plurality of the composite pipes (3) are arranged inside the steel pipe (1), and the plurality of the composite pipes (3) are arbitrarily positioned inside the cross section of the steel pipe (1).
4. A steel pipe and concrete composite structure as claimed in claim 1, wherein said FRP sandwich steel pipe is composed of an inner FRP (301), an inner steel pipe (302), and an outer FRP (303), and said FRP inner steel pipe is composed of an inner FRP (301) and an inner steel pipe (302), from inside to outside.
5. A steel pipe mixed concrete composite structure as claimed in claim 1, wherein the seawater sea sand concrete (4) is cast in situ or precast to fill the inside of the cross section of the composite pipe (3), and precast to form a prefabricated composite pipe seawater sea sand concrete member.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921927269.9U CN211775115U (en) | 2019-11-08 | 2019-11-08 | Steel pipe mixed concrete composite structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921927269.9U CN211775115U (en) | 2019-11-08 | 2019-11-08 | Steel pipe mixed concrete composite structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714401A (en) * | 2019-11-08 | 2020-01-21 | 南京林业大学 | FRP pipe sea water sea sand concrete-reinforced concrete composite beam |
| CN112761256A (en) * | 2021-01-22 | 2021-05-07 | 暨南大学 | Prefabricated FRP multi-pipe-core confined concrete composite member and construction method thereof |
| CN114737812A (en) * | 2022-05-10 | 2022-07-12 | 暨南大学 | Anti-buckling steel pipe-FRP (fiber reinforced plastic) confined concrete combined member and construction method |
-
2019
- 2019-11-08 CN CN201921927269.9U patent/CN211775115U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714401A (en) * | 2019-11-08 | 2020-01-21 | 南京林业大学 | FRP pipe sea water sea sand concrete-reinforced concrete composite beam |
| CN112761256A (en) * | 2021-01-22 | 2021-05-07 | 暨南大学 | Prefabricated FRP multi-pipe-core confined concrete composite member and construction method thereof |
| CN112761256B (en) * | 2021-01-22 | 2024-05-28 | 暨南大学 | Prefabricated FRP multi-die confined concrete combined member and construction method thereof |
| CN114737812A (en) * | 2022-05-10 | 2022-07-12 | 暨南大学 | Anti-buckling steel pipe-FRP (fiber reinforced plastic) confined concrete combined member and construction method |
| CN114737812B (en) * | 2022-05-10 | 2023-11-14 | 暨南大学 | Buckling-restrained steel tube-FRP (fiber reinforced Plastic) confined concrete combined member and construction method |
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Assignee: Zhenjiang Heng An Civil Technology Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000368 Denomination of utility model: A kind of composite steel tube concrete structure Granted publication date: 20201027 License type: Common License Record date: 20201212 Assignee: BEIJING JIUTONGQU TESTING TECHNOLOGY Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000367 Denomination of utility model: A kind of composite steel tube concrete structure Granted publication date: 20201027 License type: Common License Record date: 20201212 Assignee: Hefei Shuang Dao run Highway Engineering Co.,Ltd. Assignor: NANJING FORESTRY University Contract record no.: X2020320000366 Denomination of utility model: A kind of composite steel tube concrete structure Granted publication date: 20201027 License type: Common License Record date: 20201212 |