CN116044200B - Column top node structure and method for concrete filled steel tube reinforced concrete column - Google Patents
Column top node structure and method for concrete filled steel tube reinforced concrete column Download PDFInfo
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- CN116044200B CN116044200B CN202310031074.0A CN202310031074A CN116044200B CN 116044200 B CN116044200 B CN 116044200B CN 202310031074 A CN202310031074 A CN 202310031074A CN 116044200 B CN116044200 B CN 116044200B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 280
- 239000010959 steel Substances 0.000 title claims abstract description 280
- 239000004567 concrete Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011150 reinforced concrete Substances 0.000 title claims description 12
- 239000004568 cement Substances 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims description 30
- 238000003466 welding Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 11
- 239000010410 layer Substances 0.000 description 17
- 230000003014 reinforcing effect Effects 0.000 description 9
- 230000006978 adaptation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011376 self-consolidating concrete Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a top node structure and a method for a concrete column reinforced by an outer steel tube concrete, which comprise two original concrete columns, wherein an outer steel tube is sleeved on each original concrete column, a post-pouring concrete layer is arranged between each original concrete column and each outer steel tube, each post-pouring concrete layer is fixedly connected with each original concrete column through a plurality of anchor rods arranged circumferentially, the top surface of each outer steel tube positioned at the bottom of a floor slab is abutted against the bottom surface of the floor slab, gaps matched with main beams and secondary beams are formed in the top of each outer steel tube, two outer steel tubes sleeved on the two original concrete columns are fixedly connected through a plurality of vertical connecting pieces, transverse connecting pieces are arranged at the edge positions of the gaps of the outer steel tubes positioned at the bottom of the floor slab, and cement is filled at the joints of the vertical connecting pieces and the floor slab. The invention has simple structure and convenient construction, can effectively reduce cost consumption and construction difficulty and quicken construction progress.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a column top node structure and method of an outer sleeve concrete filled steel tube reinforced concrete column.
Background
The steel pipe concrete column is a combined structure in which a steel pipe formed by filling concrete into a steel pipe and the concrete bear external load together. The steel pipe concrete column has the characteristics of high strength, good ductility, fatigue resistance and good impact resistance, and the external steel pipe has a strong restraint effect on core concrete. In practice, the safety and normal use of the structure are affected due to the problems of the change of the original use functions of the building, the improvement of the earthquake-resistant grade of the area, the structural damage of the concrete column and the degradation of the structural performance. Therefore, the original concrete column needs to be reinforced, and the original column can be reinforced by a sleeved steel tube concrete reinforcing method in engineering.
The method for reinforcing the concrete of the outer sleeve steel tube is a method for arranging the steel tube outside the original column and filling new interlayer concrete between the steel tube and the original concrete so as to restrain the original column and play a role in reinforcing. The reinforced steel plate is a combination of an enlarged section reinforcing method and an outsourced steel reinforcing method, has the advantages of the two reinforcing methods, and can well make up the defects of the two reinforcing methods. The performance of steel and concrete can be guaranteed to be fully exerted, the bearing capacity and the deformability of the component are greatly improved, the reinforcing part and the original structure work cooperatively better, and the integrity is greatly improved. Meanwhile, the existing structure is repaired and reinforced, so that the waste of natural resources and social resources can be avoided, the service life of the structure is prolonged on the basis of not changing the form of the structure, the construction period is shortened, the cost is reduced, and the influence on society is reduced. In the process of carrying out actual reinforcement construction by adopting the method, the problem of node connection between the upper end of the column and other parts such as a beam plate is often required to be considered, but the original beam column structure is required to be greatly modified in the prior art, so that the construction procedure of the node is complex, and the construction progress is seriously influenced.
Disclosure of Invention
The invention aims to provide a column top node structure of an outer-sleeved steel tube concrete reinforced concrete column and a method thereof, which are used for solving the problems in the prior art.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a column top node structure of an outer-sleeved steel tube concrete reinforced concrete column, which comprises the following components:
The concrete column comprises two adjacent original concrete columns arranged at the top and the bottom of a floor, wherein an outer sleeve steel pipe is sleeved on the original concrete columns, a post-pouring concrete layer is arranged between the original concrete columns and the outer sleeve steel pipe, the outer sleeve steel pipe is fixedly connected with the original concrete columns through a plurality of anchor rods arranged in the circumferential direction, the top surface of the outer sleeve steel pipe at the bottom of the floor is abutted to the bottom surface of the floor, a gap matched with a main beam and a secondary beam is formed in the top of the outer sleeve steel pipe, two outer sleeve steel pipes on the original concrete columns are fixedly connected through a plurality of vertical connecting pieces, transverse connecting pieces are arranged at the edge positions of the gaps of the outer sleeve steel pipes at the bottom of the floor, and cement is filled at the joints of the floor.
Preferably, the original concrete column is set as a concrete column, the outer sleeve steel pipe is set as an outer sleeve round steel pipe, the post-cast concrete layer is set as a round post-cast concrete layer, the secondary beam is set as a first secondary beam, the main beam is set as a first main beam, and the floor slab is set as a first floor slab;
The vertical connecting piece includes eight first vertical unilateral angle steel connecting pieces that punches a hole, two first vertical unilateral angle steel connecting pieces that punches a hole is a set of, and every group first vertical unilateral angle steel connecting piece that punches a hole sets up respectively the both sides of first girder or first secondary beam, the top of first vertical unilateral angle steel connecting piece that punches a hole runs through first floor bottom surface with be located first floor top the welding of overcoat round steel pipe outer wall, the bottom of first vertical unilateral angle steel connecting piece with be located first floor bottom overcoat round steel pipe outer wall welding, a plurality of the middle part of first vertical unilateral angle steel connecting piece that punches a hole is respectively with first girder or first secondary beam through first crab-bolt rigid coupling.
Preferably, the transverse connecting piece comprises eight first transverse unilateral punching angle steel connecting pieces, the eight first transverse unilateral punching angle steel connecting pieces are respectively arranged at the positions of the round steel pipe openings of the outer sleeve and are positioned at the joints of the first floor slab, the first main beam and the first primary beam, one side of each first transverse unilateral punching angle steel connecting piece is welded with the round steel pipe of the outer sleeve, and the other side of each first transverse unilateral punching angle steel connecting piece is respectively fixedly connected with the first floor slab, the first main beam and the first primary beam through the first anchor bolt.
Preferably, a plurality of anchor rods are arranged as first anchor rods, a first main beam and a first secondary beam which are arranged at the top of the outer sleeve round steel pipe in an adaptation mutually perpendicular mode are cut into four connecting walls, and the connecting walls are fixedly connected with the outer sleeve round steel pipe, the round post-cast concrete layer and the concrete cylinder through a plurality of first anchor rods.
Preferably, the original concrete column is set as a concrete square column, the outer sleeve steel pipe is set as an outer sleeve square steel pipe, the post-cast concrete layer is set as a square post-cast concrete layer, the main beam is set as a second main beam, and the secondary beam is set as a second secondary beam;
the vertical connecting piece includes eight vertical unilateral angle steel connecting pieces that punches a hole of second, two the vertical unilateral angle steel connecting piece that punches a hole of second is a set of, and every group the vertical unilateral angle steel connecting piece that punches a hole of second sets up respectively the both sides of second girder or second secondary beam, the top of the vertical unilateral angle steel connecting piece that punches a hole of second runs through second floor bottom surface and is located second floor top the welding of overcoat square steel pipe outer wall, the bottom of the vertical unilateral angle steel connecting piece that punches a hole of second with be located the bottom of the second floor overcoat square steel pipe outer wall welding, a plurality of the vertical unilateral angle steel connecting piece's of second middle part respectively with second girder or second secondary beam pass through the second crab-bolt rigid coupling.
Preferably, the transverse connecting piece comprises twelve second transverse unilateral punching angle steel connecting pieces, twelve second transverse unilateral punching angle steel connecting pieces are respectively arranged at the positions of the square steel tube openings of the outer sleeve and are positioned at the joints of the second floor slabs, the second main beams and the second secondary beams, three transverse unilateral punching angle steel connecting pieces are respectively arranged on each side of the square steel tube openings of the outer sleeve, one side of each transverse unilateral punching angle steel connecting piece of the second is welded with the square steel tube of the outer sleeve, and the other side of each transverse unilateral punching angle steel connecting piece of the second is respectively welded with the second floor slabs, the second main beams and the second secondary beams are fixedly connected through second anchor bolts.
Preferably, a plurality of anchor rods are arranged as second anchor rods, the top of the square steel tube of the outer sleeve is provided with a second main beam and a second main beam which are arranged in a mutually vertical mode in an adaptation mode, the second main beam and the second main beam are cut into four connecting walls, and the connecting walls are fixedly connected with the square steel tube of the outer sleeve, the square post-cast concrete layer and the concrete square column through a plurality of second anchor rods.
A method for connecting a column top node structure of an outer-sleeved steel tube concrete reinforced concrete column comprises the following steps:
S1, cutting the outer sleeve steel pipe to adapt to the staggered arrangement condition of main beams and secondary beams at the bottom of the accessory block plate, and enabling the top of the outer sleeve steel pipe to extend to the bottom surface of a floor slab;
s2, connecting holes matched with the vertical connectors are formed in joints of the steel pipe walls of the main beam, the secondary beam and the outer sleeve on the floor slab;
s3, arranging a plurality of anchor rods on the outer sleeve steel pipe, the post-cast concrete layer and the original concrete column;
s4, the vertical connecting piece penetrates through a connecting hole formed in the original floor slab, the middle of the vertical connecting piece is anchored with the side edge of the main beam or the secondary beam through an anchor bolt, and two ends of the vertical connecting piece are respectively welded with the outer wall of the upper end of the outer sleeve steel pipe below the floor slab and the outer wall of the lower end of the outer sleeve steel pipe above the floor slab;
S5, anchoring one side of the transverse connecting piece with the main beam or the secondary beam or the floor slab through an anchor bolt, and welding the other side of the transverse connecting piece with the wall of the outer sleeve steel pipe;
s6, filling gaps between the connecting holes and the vertical connectors through cement-based materials, and completing node connection.
The invention discloses the following technical effects: the invention reserves the original beam column structure node and slightly reforms the outside. By the method, rigid connection within the height range of the reinforced column node can be realized, the constraint effect on the node is enhanced, the bearing capacity is improved, and the safety and stability of the node can be effectively ensured. Meanwhile, the node is simple in structure and convenient to construct, cost consumption and construction difficulty can be effectively reduced, and construction progress is quickened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of 2-2 of FIG. 1;
fig. 3 is a schematic structural view of a first vertical single-side punched angle steel connecting member in embodiment 1 of the present invention;
fig. 4 is a top view of a first transverse single-sided punched angle steel connecting member in embodiment 1 of the present invention;
fig. 5 is a front view of the first transverse single-sided punching angle steel connecting member in embodiment 1 of the present invention;
FIG. 6 is a side view of a first transverse single sided angle connector of example 1 of the present invention;
FIG. 7 is a schematic structural view of embodiment 2 of the present invention;
FIG. 8 is a cross-sectional view of 1-1 of FIG. 7;
fig. 9 is a schematic structural view of a first vertical single-side punched angle steel connecting member in embodiment 2 of the present invention;
Fig. 10 is a top view of a first transverse single-sided punched angle steel connecting member in embodiment 2 of the present invention;
fig. 11 is a front view of the first transverse single-sided punching angle steel connecting member in embodiment 2 of the present invention;
FIG. 12 is a side view of a first transverse single sided angle connector of example 2 of the present invention;
Wherein, 1, the square steel tube is sleeved outside; 2. square post-pouring concrete; 3. a concrete square column; 4. the second vertical unilateral punching angle steel connecting piece; 5. the second transverse unilateral punching angle steel connecting piece; 6. a second floor; 7. a second main beam; 8. a second secondary beam; 9. a second anchor rod; 10. a second anchor bolt; 11. sleeving a round steel pipe; 12. round post-pouring concrete; 13. a concrete cylinder; 14. the first vertical unilateral punching angle steel connecting piece; 15. the first transverse unilateral punching angle steel connecting piece; 16. a first floor; 17. a first main beam; 18. a first secondary beam; 19. a first anchor rod; 20. a first anchor bolt.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
Referring to fig. 1-6, the present invention provides a column top node structure of an outer concrete filled steel tube reinforced concrete column, comprising:
The adjacent two former concrete columns of setting at floor top and bottom, former concrete column is gone up the cover and is equipped with the overcoat steel pipe, be provided with the post-cast concrete layer between former concrete column and the overcoat steel pipe, post-cast concrete layer and former concrete column pass through a plurality of stock rigid couplings that circumference set up, the top surface and the floor bottom surface butt of the overcoat steel pipe that are located the floor bottom, and the opening with girder and secondary beam looks adaptation has been seted up at overcoat steel pipe top, two overcoat steel pipes of cover on two former concrete columns pass through a plurality of vertical connecting piece rigid couplings, overcoat steel pipe opening border position that is located the floor bottom is provided with transverse connection spare, vertical connecting piece and floor seam crossing filling are provided with cement.
The invention reserves the original beam column structure node and slightly reforms the outside. By the method, rigid connection within the height range of the reinforced column node can be realized, the constraint effect on the node is enhanced, the bearing capacity is improved, and the safety and stability of the node can be effectively ensured. Meanwhile, the node is simple in structure and convenient to construct, cost consumption and construction difficulty can be effectively reduced, and construction progress is quickened.
According to a further optimization scheme, the original concrete column is set to be a concrete column 13, the outer sleeve steel pipe is set to be an outer sleeve round steel pipe 11, the post-cast concrete layer is set to be round post-cast concrete 12, the secondary beam is set to be a first primary beam 18, the main beam is set to be a first main beam 17, and the floor slab is set to be a first floor slab 16;
The vertical connecting piece includes eight first vertical unilateral angle steel connecting pieces 14 that punches a hole, two first vertical unilateral angle steel connecting pieces 14 are a set of, each first vertical unilateral angle steel connecting piece 14 that punches a hole of group sets up respectively in the both sides of first girder 17 or first secondary beam 18, the top of first vertical unilateral angle steel connecting piece 14 runs through first floor 16 bottom and is located first floor 16 top coat round steel pipe 11 outer wall welding, the bottom of first vertical unilateral angle steel connecting piece 14 and the coat round steel pipe 11 outer wall welding that is located first floor 16 bottom, the middle part of a plurality of first vertical unilateral angle steel connecting pieces 14 that punches a hole respectively with first girder 17 or first secondary beam 18 pass through first crab-bolt 20 rigid coupling.
In the case of reinforcing the concrete cylinder 13 by the outer circular steel tube 11, the outer circular steel tube 11 concrete is cut from the beam bottom and then extends to four parts of the plate bottom, and two thicker anchor rods are used for anchoring on each cambered surface of the outer circular steel tube 11 respectively and extend to the original concrete column to ensure enough depth. The anchor rods are arranged at the middle position of the circular arc in the horizontal position and extend to the circle center, and the two anchor rods are correspondingly arranged up and down at a certain distance.
The number, the positions, the connection modes, the holes on the connection pieces and the number of the anchor bolts arranged at the joint of the round steel pipe 11 and the beam are the same as those of the connection pieces on the square steel pipe 1. The difference is that the vertical connecting piece applied to the round steel pipe 11 is arc-shaped on the surface connected with the wall of the square steel pipe 1, can be well attached to the pipe wall, and the total number of the vertical connecting pieces is 8 for the whole node.
Further optimizing scheme, the transverse connecting piece includes eight first horizontal unilateral angle steel connecting pieces 15 that punch a hole, eight first horizontal unilateral angle steel connecting pieces 15 that punch a hole set up respectively in overcoat round steel pipe 11 opening and first floor 16, first girder 17 and first girder 18 seam crossing, one side of first horizontal unilateral angle steel connecting piece 15 and overcoat round steel pipe 11 welding, first horizontal unilateral angle steel connecting piece 15 opposite side respectively with first floor 16, first girder 17 and first girder 18 pass through first crab-bolt 20 rigid coupling.
The transverse connecting piece at the joint of the outer sleeve round steel pipe 11 and the beam or plate is connected in the same way as the connecting piece on the outer sleeve square steel pipe 1, the side connected with the beam bottom or plate bottom is in a fan ring shape, and the side connected with the outer sleeve round steel pipe 11 is in a ring-shaped steel sheet. The bottoms of the first main beam 17 and the first secondary beam 18 are respectively provided with a transverse connecting piece, the transverse connecting piece is provided with 2 holes, and the two holes are anchored by 2 first anchor bolts 20; the plate bottoms between the first main beam 17 and the first secondary beam 18 are provided with connecting pieces, the transverse connecting pieces are provided with 4 holes, 4 anchor bolts are used for anchoring, and 8 transverse connecting pieces are arranged in the whole node.
Further optimizing scheme, a plurality of stock sets up to first stock 19, and the first girder 17 and the first secondary beam 18 that the top of overcoat round steel pipe 11 set up for adaptation mutually perpendicular are cut into four linking walls, and the linking wall passes through a plurality of first stock 19 and overcoat round steel pipe 11, circular post-cast concrete 12 and concrete cylinder 13 rigid coupling.
A method for connecting a column top node structure of an outer-sleeved steel tube concrete reinforced concrete column comprises the following steps:
S1, cutting the outer sleeve steel pipe to adapt to the staggered arrangement condition of main beams and secondary beams at the bottom of the accessory block plate, and enabling the top of the outer sleeve steel pipe to extend to the bottom surface of a floor slab;
s2, connecting holes matched with the vertical connectors are formed in joints of the steel pipe walls of the main beam, the secondary beam and the outer sleeve on the floor slab;
s3, arranging a plurality of anchor rods on the outer sleeve steel pipe, the post-cast concrete layer and the original concrete column;
s4, the vertical connecting piece penetrates through a connecting hole formed in the original floor slab, the middle of the vertical connecting piece is anchored with the side edge of the main beam or the secondary beam through an anchor bolt, and two ends of the vertical connecting piece are respectively welded with the outer wall of the upper end of the outer sleeve steel pipe below the floor slab and the outer wall of the lower end of the outer sleeve steel pipe above the floor slab;
S5, anchoring one side of the transverse connecting piece with the main beam or the secondary beam or the floor slab through an anchor bolt, and welding the other side of the transverse connecting piece with the wall of the outer sleeve steel pipe;
s6, filling gaps between the connecting holes and the vertical connectors through cement-based materials, and completing node connection.
When the concrete column with the beam plate at the upper end is reinforced by adopting an outer sleeve steel pipe concrete method, the outer sleeve steel pipe can be cut according to the staggered condition of the main beam and the secondary beam, so that the outer sleeve steel pipe extends to the bottom of the original floor plate; then the outer sleeve steel pipe concrete and the original concrete column are anchored through an anchor rod; the floor slab is provided with holes, a unilateral punching angle steel vertical connecting piece penetrating through the floor slab is adopted to connect the lower layer of outer sleeve steel pipe with the upper layer of outer sleeve steel pipe, and the gaps of the holes are filled with cement-based materials; finally, the joints of the beams and the plates and the outer sleeve steel pipes are also sealed through transverse connectors, and then anchor bolts are used for anchoring, so that node connection is completed. The vertical connecting piece has enough extension length, and the total cross-sectional area of one side of the vertical connecting piece connected with the outer sleeve steel pipe is not smaller than the cross-sectional area of the outer sleeve steel pipe; the anchor rods should extend to a depth into the original concrete column.
The side edges of the extension parts left by cutting the upper ends of the outer sleeve steel pipes are connected with the main beams and the secondary beams and are symmetrically distributed.
The vertical connecting piece and the transverse connecting piece are unilateral punching angle steel connecting pieces, the reference size is as follows, the thickness is 10-30mm, the width is 15-40mm, the width of two sides is equal, the thickness of one side connected with the outer sleeve steel pipe is about twice of the thickness of the other side, the diameter of the opening hole side is 4-10mm, and the actual size is selected according to engineering conditions.
The reference cross-sectional area of one side of the single vertical connecting piece connected with the outer sleeve steel pipe is 200-800 mm < 2 >, and the total cross-sectional area of the vertical connecting piece is not smaller than the cross-sectional area of the outer sleeve steel pipe.
The vertical connecting piece is of a variable cross section, the joint of the middle part and the main beam and the secondary beam is a right angle steel, the upper end and the lower end can be regarded as a rectangular steel plate strip (the joint surface of the vertical connecting piece connected with the round steel pipe 11 of the outer sleeve and the pipe wall is an arc surface capable of being jointed with the pipe wall), and the vertical connecting piece is connected with the outer sleeve. One side with holes is anchored with the main beam or the secondary beam side through an anchor bolt, the other side without holes is welded with the outer sleeve steel pipe, and only the other side without holes extends to the part above the floor slab and the part below the beam bottom. The vertical connectors are symmetrically arranged around the outer sleeve steel pipe and are clung to joints of the outer sleeve steel pipe, the main beams and the secondary beams.
The transverse connecting piece is a constant-section angle steel, one side of the transverse connecting piece is provided with a hole, the other side of the transverse connecting piece is not provided with a hole, the anchor bolt is anchored with the beam bottom or the plate bottom at one side of the transverse connecting piece, and the other side of the transverse connecting piece is welded with the outer sleeve steel pipe. For the round steel pipe 11, one side connected with the steel pipe is an arc steel plate attached with the steel pipe, and the other side is a fan ring.
One side of the upper end of the vertical connecting piece connected with the steel pipe extends out from the top of the original floor slab, and the distance between the vertical connecting piece and the top of the original floor slab is not less than 100mm.
One side of the lower end of the vertical connecting piece connected with the steel pipe extends out from the lower end of the original floor slab, and the distance between the vertical connecting piece and the bottom of the main beam is not less than 100mm.
The anchor rod and the anchor bolt have the reference dimension of 6-12mm in diameter, and extend to the depth of about 150mm in the original concrete column, and the bottom surface of the outer end part of the anchor rod used for the round steel pipe is an arc surface attached to the outer wall of the round steel pipe; the reference dimension of the anchor bolt is 4-10mm in diameter, the anchor bolt extends to about 15-20mm in the beam plate, the bolt used for anchoring the bottom of the plate is not too long, and the actual dimension of the anchor bolt are selected according to engineering conditions.
Example 2
Referring to fig. 7 to 12, the original concrete column is set as a concrete square column 3, the outer sleeve steel pipe is set as an outer sleeve square steel pipe 1, the post-cast concrete layer is set as square post-cast concrete 2, the main beam is set as a second main beam 7, and the secondary beam is set as a second secondary beam 8;
The vertical connecting piece includes eight vertical unilateral angle steel connecting pieces 4 that punches a hole of second, two vertical unilateral angle steel connecting pieces 4 that punch a hole of second are a set of, each vertical unilateral angle steel connecting piece 4 that punches a hole of second sets up respectively in the both sides of second girder 7 or second secondary beam 8, the top of the vertical unilateral angle steel connecting piece 4 that punches a hole of second runs through second floor 6 bottom surfaces and is located the outer wall welding of the square steel pipe 1 of 6 top jackets of second floor, the bottom of the vertical unilateral angle steel connecting piece 4 that punches a hole of second and the outer wall welding of the square steel pipe 1 of overcoat that is located the bottom of second floor 6, the middle part of the vertical unilateral angle steel connecting piece 4 that punches a hole of a plurality of second respectively with second girder 7 or second secondary beam 8 pass through second crab-bolt 10 rigid coupling.
To the square concrete square column 3's of overcoat square steel pipe 1 reinforcement condition, extend to four parts of board bottom after overcoat square steel pipe 1 concrete is cut from the roof beam bottom, every part is on two adjacent faces of overcoat square steel pipe 1, anchor with two thin stock and a thick stock respectively, and the stock extends to and guarantees sufficient degree of depth in the concrete square column 3. The space position of the thick anchor rod is arranged between the two vertical thin anchor rods, so that the anchoring force is ensured, the narrow joint space is designed and utilized flexibly, and the components of each part are not too concentrated and crowded.
The vertical connecting piece at the joint of the square steel tube 1 of the outer sleeve and the beam is of a variable cross section, the part without holes at the upper end of the connecting piece extends upwards through the floor slab, the part without holes at the lower end extends below the second main beam 7 and the second secondary beam 8, one side with holes and the side edge of the second main beam 7 or the side edge of the second secondary beam 8 penetrate through holes in the vertical connecting piece through a second anchor bolt 10 to be anchored, and the other side without holes and the outer wall of the upper end of the square steel tube 1 of the outer sleeve at the lower part and the outer wall of the lower end of the square steel tube 1 of the outer sleeve at the upper part are welded respectively. 4 holes are uniformly formed in the middle of the connecting part of the vertical connecting piece and the second main beam 7, and the vertical connecting piece is anchored by 4 second anchor bolts 10; and 3 holes are uniformly formed in the middle of the part connected with the second secondary beam 8, 3 second anchor bolts 10 are used for anchoring, and 8 vertical connectors are arranged in the whole node.
Further optimizing scheme, the transverse connecting piece includes twelve horizontal unilateral angle steel connecting pieces 5 that punch a hole of second, twelve horizontal unilateral angle steel connecting pieces 5 that punch a hole of second are located second floor 6, second girder 7 and second secondary beam 8 seam crossing in being located overcoat square steel pipe 1 opening department respectively, overcoat square steel pipe 1 opening department each side is provided with horizontal unilateral angle steel connecting pieces 5 of three second respectively, one side of the horizontal unilateral angle steel connecting pieces 5 that punches a hole of second welds with overcoat square steel pipe 1, the 5 opposite side of the horizontal unilateral angle steel connecting pieces that punches a hole of second respectively with second floor 6, second girder 7 and second secondary beam 8 pass through the rigid coupling of second crab-bolt 10.
The transverse connecting piece at the joint of the square steel tube 1 and the beam or the plate is of a uniform section, one section with holes is anchored with the beam or the plate, and the other end is welded with the square steel tube 1. The joint of the left end part, the right end part and the bottom of the plate of each of the four surfaces of the steel pipe is respectively provided with a transverse connecting piece, and the joint of the middle part and the bottom of the beam is provided with a transverse connecting piece. 3 holes are formed in the joint connecting piece of the second main beam 7, and 3 second anchor bolts 10 are used for anchoring; the rest connecting pieces are provided with 2 holes, 2 second anchor bolts 10 are used for anchoring, and the total number of the whole node is 12 transverse connecting pieces.
For the square steel tube 1 of the outer sleeve, both sides of the angle steel are rectangular steel plates;
Further optimizing scheme, a plurality of stock settings are second stock 9, and second girder 7 and the second secondary beam 8 that overcoat square steel pipe 1 top set up for adaptation mutually perpendicular are cut into four linking walls, and the linking wall passes through a plurality of second stock 9 and overcoat square steel pipe 1, square post-cast concrete 2 and concrete square post 3 rigid coupling.
Example 3
The reinforced column is a common concrete square column 3, the column size is 750mm multiplied by 750mm, the main beam size is 600mm multiplied by 300mm, the secondary beam size is 500mm multiplied by 250mm, the floor slab thickness is 150mm, and the strength grade is C25; the post-cast concrete layer is micro-expansion self-compaction concrete, and the strength grade is C30; the steel pipe is a square steel pipe and is processed by adopting a Q235 hot rolled steel plate, the size of the steel pipe is 1000mm multiplied by 1000mm, and the thickness of the steel pipe is 3.16mm; the thick edge width and thickness of the connecting piece are 25mm, the length of the vertical connecting piece is 1100mm, and the lengths of the transverse connecting pieces of the girder bottom, the secondary girder bottom, the girder side plate bottom and the secondary girder side plate bottom are 300mm, 250mm, 350mm and 375mm respectively. The cut steel pipe extends to the top of the plate and is distributed between the included angles of the main beam and the secondary beam for 4 parts; two side faces of each part of steel pipes between the main beams and the secondary beams are anchored by two thin anchor rods and one thick anchor rod respectively, and the total number of the anchor rods is 12. One side with holes of the vertical connecting piece is anchored with the side edge of the main beam or the secondary beam through an anchor bolt, one side without holes is welded with the outer wall of the upper end of the lower outer sleeve steel pipe and the outer wall of the lower end of the upper outer sleeve steel pipe respectively to form longitudinal welding seams, the four sides of the steel pipes are symmetrically arranged and are clung to the joint of the steel pipes and the beams, and the number of the vertical connecting pieces is 8; the transverse unilateral punching angle steel connecting pieces are anchored with the girder or the girder bottom of the secondary girder or the plate bottom through anchor bolts on one side with holes, and welded with the outer steel pipe wall on the other side without holes, and the total number of the transverse connecting pieces is 12.
Example 4
The reinforced column is a common concrete column 13, the diameter of the column is 800mm, the size of a main beam is 700mm multiplied by 300mm, the size of a secondary beam is 550mm multiplied by 250mm, the thickness of the plate is 150mm, and the strength grade is C40; the post-cast concrete layer is self-compacting concrete, and the strength grade is C60; the steel pipe is a round steel pipe, the steel pipe is Q355, the diameter of the steel pipe is 1000mm, and the thickness of the steel pipe is 4.4mm; the width and the thickness of the thick edge of the connecting piece are 30mm, the arc surface is attached to the wall of the round steel pipe, the length of the vertical connecting piece is 1200mm, and the lengths and the radians of the transverse connecting pieces of the girder bottom, the secondary girder bottom, the girder side plate bottom and the secondary girder side plate bottom are well attached to the wall of the round steel pipe without gaps. The cut steel pipe extends to the top of the plate and is distributed between the included angles of the main beam and the secondary beam for 4 parts; the arc surface of each part of steel pipe between the main girder and the secondary girder is anchored by an upper anchor rod and a lower anchor rod, and 8 anchor rods are used. One side with holes of the vertical unilateral punching connecting piece is anchored with the side edge of the main beam or the secondary beam through an anchor bolt, one side without holes is welded with the outer wall of the upper end of the lower outer sleeve steel pipe and the outer wall of the lower end of the upper outer sleeve steel pipe respectively to form longitudinal welding seams, the four sides of the steel pipes are symmetrically arranged and are clung to the joint of the steel pipes and the beams, and the number of the vertical connecting pieces is 8; the transverse unilateral punching angle steel connecting pieces are anchored with the girder or the secondary girder bottom or the plate bottom through anchor bolts on one side with holes, and welded with the outer sleeve steel pipe wall on the other side without holes, wherein the number of the transverse connecting pieces is 8.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (5)
1. The utility model provides a overcoat steel pipe concrete reinforced concrete post roof node structure which characterized in that includes:
The concrete slab comprises two adjacent original concrete columns arranged at the top and the bottom of a floor slab, wherein an outer sleeve steel pipe is sleeved on each original concrete column, a post-pouring concrete layer is arranged between each original concrete column and each outer sleeve steel pipe, each post-pouring concrete layer and each original concrete column are fixedly connected through a plurality of anchor rods arranged in the circumferential direction, the top surface of each outer sleeve steel pipe positioned at the bottom of the floor slab is abutted to the bottom surface of the floor slab, openings matched with main beams and secondary beams are formed in the top of each outer sleeve steel pipe, two outer sleeve steel pipes sleeved on each original concrete column are fixedly connected through a plurality of vertical connecting pieces, transverse connecting pieces are arranged at the edge positions of the openings of the outer sleeve steel pipes positioned at the bottom of the floor slab, and cement is filled at the joints of the vertical connecting pieces and the floor slab;
The original concrete column is arranged to be a concrete column (13), the outer sleeve steel pipe is arranged to be an outer sleeve round steel pipe (11), the post-cast concrete layer is arranged to be round post-cast concrete (12), the secondary beam is arranged to be a first primary beam (18), the main beam is arranged to be a first main beam (17), and the floor slab is arranged to be a first floor slab (16);
The vertical connecting pieces comprise eight first vertical unilateral punching angle steel connecting pieces (14), the two first vertical unilateral punching angle steel connecting pieces (14) are in a group, each group of the first vertical unilateral punching angle steel connecting pieces (14) are respectively arranged on two sides of a first main beam (17) or a first secondary beam (18), the top of each first vertical unilateral punching angle steel connecting piece (14) penetrates through the bottom surface of each first floor slab (16) and is welded with the outer wall of an outer round steel tube (11) at the top of each first floor slab (16), the bottom of each first vertical unilateral punching angle steel connecting piece (14) is welded with the outer wall of the outer round steel tube (11) at the bottom of each first floor slab (16), and the middle parts of a plurality of the first vertical unilateral punching angle steel connecting pieces (14) are respectively fixedly connected with the first main beam (17) or the first secondary beam (18) through first anchor bolts (20);
The transverse connecting pieces comprise eight first transverse unilateral punching angle steel connecting pieces (15), the eight first transverse unilateral punching angle steel connecting pieces (15) are respectively arranged at the joint of the opening of the outer round steel pipe (11) and the first floor slab (16), the first main beam (17) and the first secondary beam (18), one side of each first transverse unilateral punching angle steel connecting piece (15) is welded with the outer round steel pipe (11), and the other side of each first transverse unilateral punching angle steel connecting piece (15) is respectively fixedly connected with the first floor slab (16), the first main beam (17) and the first secondary beam (18) through the first anchor bolts (20);
the novel concrete pile comprises a plurality of anchor rods, wherein the anchor rods are arranged as first anchor rods (19), a first main beam (17) and a first primary beam (18) which are arranged at the top of an outer sleeve round steel pipe (11) in an adaptive mutually perpendicular mode are cut into four connecting walls, and the connecting walls are fixedly connected with the outer sleeve round steel pipe (11), round post-cast concrete (12) and a concrete cylinder (13) through the first anchor rods (19).
2. A sleeved steel tube concrete reinforced concrete column top node structure according to claim 1, wherein: the original concrete column is arranged to be a concrete square column (3), the outer sleeve steel pipe is arranged to be an outer sleeve square steel pipe (1), the post-cast concrete layer is arranged to be square post-cast concrete (2), the main beam is arranged to be a second main beam (7), the secondary beam is arranged to be a second secondary beam (8), and the floor slab is arranged to be a second floor slab (6);
The vertical connecting piece includes eight vertical unilateral angle steel connecting pieces (4) that punches a hole of second, two vertical unilateral angle steel connecting pieces (4) that punches a hole of second are a set of, and every group vertical unilateral angle steel connecting piece (4) that punches a hole of second set up respectively the both sides of second girder (7) or second secondary beam (8), the top of the vertical unilateral angle steel connecting piece that punches a hole of second (4) runs through second floor (6) bottom surface and is located second floor (6) top overcoat square steel pipe (1) outer wall welding, the bottom of the vertical unilateral angle steel connecting piece that punches a hole of second (4) with be located the welding of overcoat square unilateral steel pipe (1) outer wall of second floor (6) bottom, a plurality of the middle part of the vertical unilateral angle steel connecting piece that punches a hole of second (4) respectively with second girder (7) or second secondary beam (8) pass through second crab-bolt (10) rigid coupling.
3. A sleeved steel tube concrete reinforced concrete column top node structure according to claim 2, wherein: the horizontal connecting piece includes twelve horizontal unilateral angle steel connecting pieces (5) that punches a hole of second, twelve horizontal unilateral angle steel connecting pieces (5) that punches a hole of second set up respectively overcoat square steel pipe (1) opening with second floor (6) second girder (7) with second secondary beam (8) seam crossing, overcoat square steel pipe (1) opening department each side is provided with three respectively horizontal unilateral angle steel connecting pieces (5) that punch a hole of second, one side of horizontal unilateral angle steel connecting pieces (5) that punches a hole of second with overcoat square steel pipe (1) welding, horizontal unilateral angle steel connecting pieces (5) opposite side of second respectively with second floor (6) second girder (7) with second secondary beam (8) pass through second crab-bolt (10) rigid coupling.
4. A sleeved steel tube concrete reinforced concrete column top node structure according to claim 3, wherein: the anchor rods are arranged to be second anchor rods (9), a second main beam (7) and a second secondary beam (8) which are arranged at the top of the square steel tube (1) in an adaptive mutually perpendicular mode are cut to be four connecting walls, and the connecting walls are fixedly connected with the square steel tube (1) in the outer sleeve and the square post-cast concrete (2) and the square concrete column (3) through the second anchor rods (9).
5. A method of connecting a top-of-column node structure of a concrete-filled steel tube column, according to claim 1, comprising the steps of:
S1, cutting the outer sleeve steel pipe to adapt to the staggered arrangement condition of main beams and secondary beams at the bottom of the accessory block plate, and enabling the top of the outer sleeve steel pipe to extend to the bottom surface of a floor slab;
s2, connecting holes matched with the vertical connectors are formed in joints of the steel pipe walls of the main beam, the secondary beam and the outer sleeve on the floor slab;
s3, arranging a plurality of anchor rods on the outer sleeve steel pipe, the post-cast concrete layer and the original concrete column;
s4, the vertical connecting piece penetrates through a connecting hole formed in the original floor slab, the middle of the vertical connecting piece is anchored with the side edge of the main beam or the secondary beam through an anchor bolt, and two ends of the vertical connecting piece are respectively welded with the outer wall of the upper end of the outer sleeve steel pipe below the floor slab and the outer wall of the lower end of the outer sleeve steel pipe above the floor slab;
S5, anchoring one side of the transverse connecting piece with the main beam or the secondary beam or the floor slab through an anchor bolt, and welding the other side of the transverse connecting piece with the wall of the outer sleeve steel pipe;
s6, filling gaps between the connecting holes and the vertical connectors through cement-based materials, and completing node connection.
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