CN110747991A - Multi-cavity giant square concrete-filled steel tube member - Google Patents
Multi-cavity giant square concrete-filled steel tube member Download PDFInfo
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- CN110747991A CN110747991A CN201911079770.9A CN201911079770A CN110747991A CN 110747991 A CN110747991 A CN 110747991A CN 201911079770 A CN201911079770 A CN 201911079770A CN 110747991 A CN110747991 A CN 110747991A
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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
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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
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
Abstract
A multi-cavity giant square steel tube concrete member is mainly applied to large buildings and comprises square steel tubes, connecting steel plate strips, cavity-divided steel plates, a steel reinforcement cage, tie steel bars, studs, annular rib plates and concrete. The cavity-divided steel plate divides the inside of the square steel pipe into a plurality of cavities, connecting steel strips are arranged at the joint of the cavity-divided steel plate and the inner wall of the steel pipe, and the connecting steel strips and the inner wall of the steel pipe which is in contact with the cavity-divided steel plate are welded into a whole. 1 steel reinforcement cage is arranged to the equipartition in every cavity, and evenly distributed's horizontal drawknot reinforcing bar is fixed with each adjacent steel reinforcement cage drawknot, divides the chamber steel sheet to pass through the position trompil circular port at the drawknot reinforcing bar in order to guarantee that the drawknot reinforcing bar passes through smoothly. Uniformly welding studs on the drawknot steel plate and the inner wall of the square steel pipe, and additionally welding a circumferential rib plate on the inner wall of the square steel pipe at intervals of 3-5 m. And other spaces inside the square steel pipe are filled with concrete. The member has better bonding performance, constraint effect and integrity, and can reduce the hydration heat of mass concrete.
Description
Technical Field
The invention relates to a multi-cavity giant square concrete-filled steel tube component, belonging to a steel-concrete combined component for improving the bonding performance and the restraint effect.
Background
The steel pipe concrete member is widely applied to bearing members of houses, bridges and plants due to good stress performance, excellent shock resistance and convenient construction performance, and the size of the steel pipe concrete member is increased along with the continuous development of large-scale complex buildings such as super high-rise buildings. A large number of researches show that the corners of the square steel tube concrete can well restrain the concrete in the core area, but the middle parts of the peripheral steel tube walls are easy to bulge outwards and deform under the vertical or earthquake action, so that the restraint effect is lost. Other researches show that the interface bonding performance of the steel pipe and the concrete is weakened along with the increase of the size, and the bonding strength of the large square steel pipe concrete is far lower than the design recommended value of each national standard, so that the reliable shear force transmission between the steel pipe and the concrete cannot be ensured. The problem of hydration heat caused by mass concrete in a huge square steel tube concrete member cannot be ignored, and particularly, temperature cracks caused by hydration heat of the concrete in a steel tube are not easy to be perceived, so that potential safety hazards exist. There is a need for a design to reduce the defects of the huge square steel tube concrete member and promote the application and development of the huge square steel tube concrete member in engineering.
Disclosure of Invention
The invention provides a multi-cavity giant square concrete-filled steel tube member, belonging to a concrete-filled steel tube member which improves the bonding performance, the constraint effect, the bonding performance and the integrity, can reduce the hydration heat of mass concrete and is easy to construct. The cavity-divided steel plates form great restraint on the middle parts of the peripheral steel pipe walls of the steel pipes of the opposite side steel pipes, and the middle parts of the steel pipes are restrained from bulging under the action of load, so that the bearing capacity and the anti-seismic performance are improved; the problem of stress concentration exists at the joint of the cavity-dividing steel plate and the inner wall of the steel pipe, a connecting steel plate strip with higher strength and larger width is arranged at the joint, and the connecting steel plate strip, the inner wall of the steel pipe in contact with the connecting steel plate and the cavity-dividing steel plate are welded into a whole, so that the material performance of the square steel pipe and the cavity-dividing steel plate in a limit state can be fully exerted; the stud is arranged on the inner walls of the cavity-divided steel plate and the square steel pipe to ensure good bonding performance of the steel pipe and the concrete interface, and a circumferential rib plate is added to the part of the component at the node position to transfer large concentrated shearing force to locally strengthen the bonding strength of the steel pipe and the concrete interface; arranging reinforcement cages in the cavities, and connecting adjacent reinforcement cages with each other by using tie reinforcements to increase the stress coordination among the concretes in different cavities and the stress coordination between the cavity-dividing steel plate and the middle concrete so as to ensure that the whole member has better integrity; high-performance and high-strength concrete is poured in each cavity, and the relative volume of the concrete can be reduced due to the existence of the cavities, so that the problems of hydration heat and the like of the large-volume concrete are solved; the appearance of the reserved square steel tube enables the construction of the member node to be simpler, and the basic form of the reserved steel tube concrete is easier to prefabricate in factories and construct on the spot.
The invention adopts the following technical scheme:
a multi-cavity huge square concrete-filled steel tube member is characterized in that: the steel reinforcement cage comprises a square steel pipe 1, a connecting steel plate strip 2, a cavity-divided steel plate 3, a steel reinforcement cage 4, tie steel bars 5, studs 6, annular rib plates 7 and concrete 8; the cavity dividing steel plate 3 divides the interior of the square steel tube into a plurality of cavities, a connecting steel strip 2 is arranged at the joint of the cavity dividing steel plate 3, the connecting steel strip 2 is arranged at the joint of the cavity dividing steel plate 3 and the square steel tube 1, and the connecting steel strip 2 is welded with the square steel tube 1 and the cavity dividing steel plate 3 which are in contact into a whole; 1 steel reinforcement cage 4 is uniformly distributed in each cavity, each adjacent steel reinforcement cage 4 is fixed by uniformly distributed horizontal tie bars 5 in a tie manner, and a round hole is formed in the position where the tie bars 5 pass through by the cavity-dividing steel plate 3 so as to ensure that the tie bars 5 pass through smoothly; uniformly welding studs 6 on the cavity-dividing steel plate 3 and the inner wall of the square steel tube 1, and additionally welding one annular rib plate 7 on the inner wall of the square steel tube 1 every 3-5 m; other spaces inside the square steel tube are filled with concrete 8.
Preferably, the side length of the giant square steel pipe is 2m or more, the thickness is obtained from technical Specification for Steel pipe concrete Structure GB50936-2014, and the strength of the steel used is not lower than Q345.
Preferably, the thickness of the cavity-separating steel plate is 1/2-3/4 of the thickness of the square steel tube, and a round hole 2 times the diameter of the tie steel bar is formed in the position where the tie steel bar passes through.
Preferably, the width of the connecting steel plate strip is not less than 2 times of the thickness of the cavity separating steel plate, the thickness and the width of the connecting steel plate strip for connecting each cavity separating steel plate are equal, the thickness of the connecting steel plate strip for connecting the square steel pipe and the cavity separating steel plate is not less than 1/2 of the thickness of the cavity separating steel plate, and the strength of the steel used is higher than that of the steel of the square steel pipe and the cavity separating steel plate.
Preferably, the diameter of the longitudinal bar of the reinforcement cage is 20 mm-40 mm, the diameter of the stirrup is 10 mm-16 mm, the diameter of the tie bar is 20 mm-40 mm, and the strength of the used bar is not lower than 400 MPa.
Preferably, the sizes and the intervals of the studs meet the design specification of a steel structure GB 50017-2017.
Preferably, the thickness of the annular rib plate is 1/2-2/3 of the thickness of the square steel tube, and the width of the annular rib plate is 1/10-1/5 of the length of the side of the section of the square steel tube concrete.
Preferably, the concrete is high-performance high-strength concrete, and the strength of the concrete is not lower than C60.
The length of the square steel tube edge is higher than 3m, 4 or 9 cavities are arranged, and the length of the square steel tube edge is higher than 4m, 9 or 16 cavities are arranged.
The preparation process comprises the following steps:
1) welding a square steel pipe 1;
2) welding the square steel pipe 1 and a connecting steel plate strip 2 at the edge;
3) welding the square steel tube 1 and the stud 6, and additionally welding annular rib plates 7 at the node positions of every 3-5 m;
4) stud 6 is welded on two sides of the cavity steel plate 3, and a round hole is formed in the position where the tie bar passes through;
5) positioning a connecting steel plate strip 2 in the middle;
6) welding the steel plate strip 2 and the cavity-divided steel plate 3;
7) positioning a reinforcement cage 4, wherein the reinforcement cage is distributed in each cavity and comprises longitudinal reinforcements and stirrups, and joints are bound and connected or welded;
8) fixing tie bars 5, wherein the tie bars pass through the cavity-divided steel plates and then are bound and connected with or welded with the reinforcement cages;
9) and (6) pouring concrete 8.
The multi-cavity giant square concrete-filled steel tube component provided by the invention has the advantages that the connecting steel plate strips, the cavity-divided steel plates, the steel reinforcement cage, the tie bars, the studs, the annular rib plates and the concrete are arranged in the square steel tubes, so that the bonding performance, the bearing capacity and the anti-seismic performance of the giant square concrete-filled steel tube component are greatly improved.
The combined member has the following advantages:
(1) the bearing capacity and the seismic performance of the square steel pipe to concrete are enhanced. The cavity-divided steel plates form a great restraint effect in the middle of the peripheral steel pipe wall of the steel pipe of the other side, the middle of the steel pipe wall is not easy to bulge under the action of load, so that the restraint effect is locally enhanced, connecting steel plate strips are arranged at the joint of the cavity-divided steel plates and the inner wall of the steel pipe to solve the problem of stress concentration, and the material performance of the square steel pipe and the cavity-divided steel plates in a limit state is fully exerted; thereby improving the stress performance of the square steel tube concrete.
(2) The interface bonding performance of the square steel tube concrete is improved. The studs are uniformly arranged on the inner walls of the cavity-divided steel plates and the square steel pipes so as to ensure good bonding performance of the steel pipes and the concrete interface; the part of the component at the node position is additionally provided with a circumferential rib plate to transfer larger concentrated shearing force, and the bonding strength of the interface of the local reinforced steel pipe and the concrete ensures that larger concentrated load is reliably transferred between the steel pipe and the concrete.
(3) The integrity is better. The square steel pipe and the cavity-divided steel plate are welded into a whole by the connecting steel plate strips, stress coordination among concrete in different cavities and stress coordination among the cavity-divided steel plate and middle concrete are better by the steel reinforcement cage and the tie steel bars, and the integrity of the square steel pipe and the edge concrete is better by good bonding performance.
(4) The hydration heat of mass concrete is reduced. High-performance and high-strength concrete is poured in each cavity, and the relative volume of the concrete in the steel pipe can be reduced due to the existence of the cavities, so that the problems of large-volume concrete hydration heat and the like are solved;
(5) the construction is simple, and the operation is easy. The appearance of the reserved square steel tube enables the construction of the member node to be simpler, and the basic form of the reserved steel tube concrete is easier to prefabricate in factories and construct on the spot.
Drawings
FIG. 1 is a schematic elevation view of a 4-cavity square concrete filled steel tube member according to the present invention;
FIG. 2 is a schematic plan view of a 4-cavity square concrete-filled steel tube member according to the present invention;
FIG. 3 is a schematic elevation view of a 9-cavity square concrete filled steel tube member according to the present invention;
FIG. 4 is a schematic plan view of a 16-cavity square concrete-filled steel tube member according to the present invention;
description of the figure code: 1-square steel tube; 2-connecting steel plate strips and 3-dividing cavity steel plates; 4-a reinforcement cage; 5-tying reinforcing steel bars; 6-stud; 7-annular rib plates; 8-concrete.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in FIGS. 1 to 3, a multi-cavity huge square steel tube concrete member comprises a 1-square steel tube; 2-connecting steel plate strips and 3-dividing cavity steel plates; 4-a reinforcement cage; 5-tying reinforcing steel bars; 6-stud; 7-annular rib plates; 8-concrete.
A multi-cavity huge square concrete-filled steel tube member is characterized in that: the steel reinforcement cage comprises a square steel pipe 1, a connecting steel plate strip 2, a cavity-divided steel plate 3, a steel reinforcement cage 4, tie steel bars 5, studs 6, annular rib plates 7 and concrete 8; the cavity dividing steel plate 3 divides the interior of the square steel tube into a plurality of cavities, a connecting steel strip 2 is arranged at the joint of the cavity dividing steel plate 3, the connecting steel strip 2 is arranged at the joint of the cavity dividing steel plate 3 and the square steel tube 1, and the connecting steel strip 2 is welded with the square steel tube 1 and the cavity dividing steel plate 3 which are in contact into a whole; 1 steel reinforcement cage 4 is uniformly distributed in each cavity, each adjacent steel reinforcement cage 4 is fixed by uniformly distributed horizontal tie bars 5 in a tie manner, and a round hole is formed in the position where the tie bars 5 pass through by the cavity-dividing steel plate 3 so as to ensure that the tie bars 5 pass through smoothly; uniformly welding studs 6 on the cavity-dividing steel plate 3 and the inner wall of the square steel tube 1, and additionally welding one annular rib plate 7 on the inner wall of the square steel tube 1 every 3-5 m; other spaces inside the square steel tube are filled with concrete 8.
Preferably, the side length of the giant square steel pipe is 2m or more, the thickness is obtained by technical Specification for Steel pipe concrete Structure GB50936-2014, and the strength of the steel is not lower than Q345; the thickness of the cavity steel plate is 1/2-3/4 of the thickness of the square steel tube, and a round hole 2 times the diameter of the tie steel bar is formed in the passing position of the tie steel bar; the width of the connecting steel plate strip is not less than 2 times of the thickness of the cavity separating steel plate, the thickness and the width of the connecting steel plate strip for connecting each cavity separating steel plate are equal, the thickness of the connecting steel plate strip for connecting the square steel pipe and the cavity separating steel plate is not less than 1/2 of the thickness of the cavity separating steel plate, and the strength of the used steel is higher than that of the square steel pipe and the cavity separating steel plate; the diameter of the longitudinal reinforcement of the reinforcement cage is 20 mm-40 mm, the diameter of the stirrup is 10 mm-16 mm, the diameter of the tie reinforcement is 20 mm-40 mm, and the strength of the used reinforcement is not lower than 400 MPa; the sizes and the intervals of the studs meet the design specification of a steel structure GB 50017-2017; the thickness of the annular rib plate is 1/2-2/3 of the thickness of the square steel tube, and the width of the annular rib plate is 1/10-1/5 of the side length of the section of the square steel tube concrete; the concrete is high-performance high-strength concrete, and the strength of the concrete is not lower than C60.
It should be noted that the number of the cavities is increased or decreased as required, 4 or 9 cavities are provided when the edge length of the square steel tube is higher than 3m, 9 or 16 cavities are provided when the edge length of the square steel tube is higher than 4m, and the like.
The foregoing is an illustrative description of the present invention and is not intended to detail any simple modification, equivalent changes and modifications, which may be made to the above embodiments by using novel technical entities, and fall within the scope of the present invention.
Claims (10)
1. A multi-cavity huge square concrete-filled steel tube member is characterized in that: the steel reinforcement cage comprises a square steel pipe (1), a connecting steel plate strip (2), a cavity-divided steel plate (3), a steel reinforcement cage (4), a tie steel bar (5), a stud (6), an annular rib plate (7) and concrete (8); the cavity-dividing steel plate (3) divides the interior of the square steel tube into a plurality of cavities, a connecting steel plate strip (2) is arranged at the joint of the cavity-dividing steel plate (3), the connecting steel plate strip (2) is arranged at the joint of the cavity-dividing steel plate (3) and the square steel tube (1), and the connecting steel plate strip (2), the square steel tube (1) and the cavity-dividing steel plate (3) which are contacted with each other are welded into a whole; 1 steel reinforcement cage (4) is uniformly distributed in each cavity, each adjacent steel reinforcement cage (4) is fixedly tied by uniformly distributed horizontal tie bars (5), and a circular hole is formed in the position, through which the tie bars (5) pass, of the cavity-dividing steel plate (3) so as to ensure that the tie bars (5) pass smoothly; uniformly welding studs (6) on the cavity-dividing steel plate (3) and the inner wall of the square steel pipe (1), and additionally welding one annular rib plate (7) on the inner wall of the square steel pipe (1) every 3-5 m; other spaces inside the square steel tube are filled with concrete (8).
2. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the side length of the giant square steel pipe is 2m or more, the thickness is obtained by the technical specification of the steel pipe concrete structure GB50936-2014, and the strength of the steel is not lower than Q345.
3. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the thickness of the cavity steel plate is 1/2-3/4 of the thickness of the square steel tube, and a round hole 2 times the diameter of the tie steel bar is formed in the passing position of the tie steel bar.
4. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the width of the connecting steel plate strip is not less than 2 times of the thickness of the cavity separating steel plate, the thickness of the connecting steel plate strip for connecting each cavity separating steel plate is equal to the width of the connecting steel plate strip, the thickness of the connecting steel plate strip for connecting the square steel pipe and the cavity separating steel plate is not less than 1/2 of the thickness of the cavity separating steel plate, and the strength of the used steel is higher than that of the steel of the square steel pipe and the cavity separating steel plate.
5. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the diameter of the longitudinal bar of the reinforcement cage is 20 mm-40 mm, the diameter of the stirrup is 10 mm-16 mm, the diameter of the tie bar is 20 mm-40 mm, and the strength of the used bar is not lower than 400 MPa.
6. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the sizes and the intervals of the studs are in accordance with the design specification of a steel structure GB 50017-2017.
7. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the thickness of the annular rib plate is 1/2-2/3 of the thickness of the square steel tube, and the width of the annular rib plate is 1/10-1/5 of the side length of the section of the square steel tube concrete.
8. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the strength of the concrete is not lower than C60.
9. The multi-chambered, giant, square, concrete-filled steel tube element of claim 1, wherein: the length of the square steel tube edge is higher than 3m, 4 or 9 cavities are arranged, and the length of the square steel tube edge is higher than 4m, 9 or 16 cavities are arranged.
10. Method for manufacturing a multi-chamber, large square concrete filled steel tube element according to any one of claims 1-9, characterized in that the manufacturing process is as follows:
1) welding a square steel pipe;
2) welding the square steel pipe and the connecting steel plate strip at the edge;
3) welding square steel pipes and studs, and additionally welding annular rib plates at the node positions of every 3-5 m;
4) stud nails are welded on two sides of the cavity-divided steel plate, and round holes are formed in the positions through which the tie bars pass;
5) positioning a connecting steel plate strip in the middle;
6) welding and connecting the steel plate strips and the cavity-divided steel plates;
7) positioning reinforcement cages which are distributed in each cavity and comprise longitudinal reinforcements and stirrups, wherein the joints are bound and connected or welded;
8) fixing the tie bars, and binding or welding the tie bars with the reinforcement cages after the tie bars pass through the cavity-divided steel plates;
9) and (5) pouring concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911079770.9A CN110747991A (en) | 2019-11-07 | 2019-11-07 | Multi-cavity giant square concrete-filled steel tube member |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911079770.9A CN110747991A (en) | 2019-11-07 | 2019-11-07 | Multi-cavity giant square concrete-filled steel tube member |
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| CN110747991A true CN110747991A (en) | 2020-02-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309292A (en) * | 2021-06-07 | 2021-08-27 | 哈尔滨工业大学 | Variable-section multi-steel-pipe high-strength waste concrete combined column and construction method thereof |
-
2019
- 2019-11-07 CN CN201911079770.9A patent/CN110747991A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309292A (en) * | 2021-06-07 | 2021-08-27 | 哈尔滨工业大学 | Variable-section multi-steel-pipe high-strength waste concrete combined column and construction method thereof |
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