CN113136943A - Connecting joint of concrete filled steel tubular column and concrete beam - Google Patents
Connecting joint of concrete filled steel tubular column and concrete beam Download PDFInfo
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- CN113136943A CN113136943A CN202110402619.5A CN202110402619A CN113136943A CN 113136943 A CN113136943 A CN 113136943A CN 202110402619 A CN202110402619 A CN 202110402619A CN 113136943 A CN113136943 A CN 113136943A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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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
- E04B1/92—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
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
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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
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- Joining Of Building Structures In Genera (AREA)
Abstract
The invention relates to the technical field of civil engineering, in particular to a connecting node of a concrete filled steel tubular column and a concrete beam. The connected node includes the steel core concrete column, the concrete beam, U-shaped steel corbel and post-cast concrete, the steel core concrete column includes the steel pipe, post concrete and first connecting piece, be equipped with first connecting hole on the pipe wall of steel pipe, first connecting piece sets up in first connecting hole, first connecting piece includes first section and second section, first section is located the steel pipe and is wrapped by post concrete, the second section is located the outside of steel pipe, the concrete beam includes first muscle and roof beam concrete of indulging, the concrete beam has first end and second end, the first end of concrete beam, inject the back between the pipe wall of U-shaped steel corbel and steel pipe and pour the chamber, post-cast concrete pours in the back and pours intracavity and cladding second section. The connecting node has the advantages of short construction period, easy guarantee of construction quality, good anti-seismic performance, low cost and the like.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a connecting node of a concrete filled steel tubular column and a concrete beam.
Background
The concrete filled steel tubular column-concrete beam frame structure in the related technology mainly has two types, the first type is an integral cast-in-place concrete filled steel tubular column-concrete beam frame structure, and the second type is a full-assembly concrete filled steel tubular column-concrete beam frame structure. The first frame structure has the problems of long construction period, difficulty in controlling construction quality and the like. The second frame structure has the problems of inconvenient hoisting construction, poor overall anti-seismic performance and the like.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a connecting node of a concrete filled steel tubular column and a concrete beam, which has good seismic performance.
The connection node of the concrete filled steel tubular column and the concrete beam comprises the following components:
the steel tube concrete column is a pouring type concrete column and comprises a steel tube, column concrete and a first connecting piece, the column concrete is poured in the steel tube, a first connecting hole which penetrates through the tube wall in the inward and outward directions is formed in the tube wall of the steel tube, the first connecting piece penetrates through the first connecting hole, the first connecting piece comprises a first section and a second section, the first section is located in the steel tube and is coated by the column concrete, and the second section is located on the outer side of the steel tube;
the concrete beam is a precast concrete beam, the concrete beam comprises a first longitudinal bar, a beam stirrup and beam concrete, the first longitudinal bars extend along the extending direction of the concrete beam, the beam stirrups are arranged at intervals along the extending direction of the concrete beam and are fixedly connected with the first longitudinal bars, at least a portion of the beam stirrup and the first longitudinal bar are concrete-clad with the beam, the concrete beam having first and second ends opposite in an extending direction of the concrete beam, the first end portion is disposed adjacent to the steel pipe with respect to the second end portion in an extending direction of the concrete beam, the first end part is arranged on the outer side of the steel pipe, the first end part and the steel pipe are spaced in the extending direction of the concrete beam, and a connecting plate is arranged at the lower end of the first end part;
the concrete beam comprises a U-shaped steel bracket, wherein the U-shaped steel bracket comprises a bottom plate and two side plates, each of the bottom plate and the two side plates is fixedly connected with the pipe wall of the steel pipe, the first end part is positioned in the U-shaped steel bracket, the connecting plate is fixedly connected with the bottom plate, and a rear pouring cavity is defined among the first end part of the concrete beam, the U-shaped steel bracket and the pipe wall of the steel pipe; and
and the post-cast concrete is poured in the post-casting cavity and coats the second section.
The connecting joint of the concrete-filled steel tubular column and the concrete beam has the advantages of short construction period, easy guarantee of construction quality, good anti-seismic performance, low cost and the like.
In some embodiments, the first connecting member is provided in plurality, and the plurality of first connecting members are arranged at intervals in the up-down direction.
In some embodiments, the first connection hole is an elongated hole extending in an up-down direction, and each of the plurality of first connection members is disposed in the same first connection hole.
In some embodiments, the outer peripheral surface of the first connector is spaced apart from the bore wall of the first connection bore.
In some embodiments, the concrete-filled steel tube column further includes a second connecting member, a second connecting hole penetrating through the tube wall in the inward and outward direction is formed in the tube wall of the steel tube, the second connecting hole and the first connecting hole are arranged at intervals in the circumferential direction of the steel tube, the second connecting member penetrates through the second connecting hole and is connected with a hole wall of the second connecting hole, the second connecting member includes a third section and a fourth section, the third section is located in the steel tube and is coated by the column concrete, and the fourth section is located outside the steel tube and is coated by the post-cast concrete.
In some embodiments, the second connecting member is provided in plurality, and the plurality of second connecting members are arranged at intervals in the up-down direction.
In some embodiments, further comprising a floor slab, the floor slab being a cast-in-place floor slab, the floor slab being provided on an upper portion of the concrete beam, the floor slab comprises second longitudinal bars and floor slab concrete, the second longitudinal bars extend along the extension direction of the concrete beam, the beam stirrup including a first portion and a second portion, the first portion being encased by the beam concrete, the second part extends out of the beam concrete upwards and is fixedly connected with the second longitudinal bar, a through hole penetrating through the pipe wall in the inner and outer directions is arranged on the pipe wall of the steel pipe, the second longitudinal bar passes through the through hole and comprises a fifth section and a sixth section, the fifth section is positioned in the steel pipe and is coated by the column concrete, the sixth section is located outside the steel pipe and is coated with the floor concrete, and the second portion is coated with the floor concrete.
In some embodiments, a stiffening grid is arranged at the perforation, and the stiffening grid is positioned outside the steel pipe and fixedly connected with the pipe wall of the steel pipe.
In some embodiments, the steel pipe is a rectangular pipe, a first reinforcing plate is arranged between two adjacent side surfaces of the steel pipe, the first reinforcing plate is arranged in the steel pipe, the first reinforcing plate has a first connecting portion and a second connecting portion, the first connecting portion is fixedly connected with one of the two adjacent side surfaces of the steel pipe, and the second connecting portion is fixedly connected with the other of the two adjacent side surfaces of the steel pipe.
In some embodiments, each of the concrete beam and the U-shaped steel brackets is provided with a plurality of the concrete beams and the U-shaped steel brackets, the plurality of the U-shaped steel brackets are arranged at intervals along the circumferential direction of the steel pipe, a second reinforcing plate is arranged between two adjacent U-shaped steel brackets, the second reinforcing plate is provided with a third connecting portion and a fourth connecting portion, the third connecting portion is fixedly connected with one of two adjacent U-shaped steel brackets, and the fourth connecting portion is fixedly connected with the other of two adjacent U-shaped steel brackets.
Drawings
Fig. 1 is a structural view of a connection node of a concrete filled steel tubular column and a concrete beam according to an embodiment of the present invention.
Fig. 2 is a longitudinal sectional view of fig. 1.
Fig. 3 is a view from a-a of fig. 2.
Fig. 4 is a schematic view of the structure of fig. 1 at a concrete beam.
Reference numerals: a connection node 100;
a steel pipe concrete column 1; a steel pipe 101; a first connection hole 1011; an L-shaped steel plate 1013; channel steel 1014; a cross-shaped lacing strip 1015; a first reinforcing plate 1016; column concrete 102; a first connecting member 103; a first section 1031; a second segment 1032; a second connector 104; a third segment 1041; a fourth section 1042; a perforation 105; a stiffening grid 106;
a concrete beam 2; a first longitudinal rib 201; a third longitudinal rib 202; beam concrete 203; a first end 204; a connecting plate 205; a beam stirrup 206;
u-shaped steel corbels 3; a base plate 301; plug weld hole 3011; side plates 302; a second reinforcing plate 303;
a floor 5; a second longitudinal rib 501; the fifth paragraph 5011; the sixth stage 5012; floor slab concrete 502.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 4, a connection node 100 for a concrete filled steel tubular column and a concrete beam according to an embodiment of the present invention includes a concrete filled steel tubular column 1, a concrete beam 2, a U-shaped steel bracket 3, and post-cast concrete 4.
The steel pipe concrete column 1 is a pouring type steel pipe concrete column. That is, the concrete filled steel tubular column 1 is cast and formed at a construction site.
The steel core concrete column 1 comprises a steel core 101, column concrete 102 and a first connecting member 103, the column concrete 102 being cast inside the steel core 101. The pipe wall of the steel pipe 101 is provided with a first connecting hole 1011 penetrating through the pipe wall in the inward and outward direction, the first connecting piece 103 penetrates through the first connecting hole 1011, the first connecting piece 103 comprises a first section 1031 and a second section 1032, the first section 1031 is located in the steel pipe 101 and is coated by the column concrete 102, and the second section 1032 is located on the outer side of the steel pipe 101.
Wherein, inward means: the direction adjacent to the center line of the steel pipe 101 on a plane perpendicular to the center line of the steel pipe 101, outward means: a direction away from the center line of the steel pipe 101 on a plane perpendicular to the center line of the steel pipe 101. The inward and outward directions are indicated by arrows B in fig. 3. Steel pipe 101 has an outer peripheral surface and an inner peripheral surface, the inner peripheral surface of steel pipe 101 being adjacent to the centerline of steel pipe 101 on a plane perpendicular to the centerline of steel pipe 101, and the outer peripheral surface of steel pipe 101 being distant from the centerline of steel pipe 101 on a plane perpendicular to the centerline of steel pipe 101.
The concrete beam 2 is a precast concrete beam 2. That is, the concrete girder 2 is prefabricated for a factory, not cast-in-place.
The U-shaped steel corbel 3 comprises a bottom plate 301 and two side plates 302, each of the bottom plate 301 and the two side plates 302 is fixedly connected with the pipe wall of the steel pipe 101, the first end portion 204 of the concrete beam 2 is located in the U-shaped steel corbel 3, and the connecting plate 205 is fixedly connected with the bottom plate 301. A rear pouring cavity is defined among the first end 204 of the concrete beam 2, the U-shaped steel corbels 3 and the wall of the steel pipe 101, and the rear pouring concrete 4 is poured in the rear pouring cavity and covers the second section 1032.
Each of the bottom plate 301 and the two side plates 302 is fixedly connected with the wall of the steel pipe 101, the first end 204 of the concrete beam 2 is located in the U-shaped steel corbel 3 and the connecting plate 205 is fixedly connected with the bottom plate 301. In other words, the connection plate 205 is connected to the wall of the steel pipe 101 via the U-shaped steel corbel 3. Thus, the force of the concrete beam 2 can be transmitted to the steel pipes 101 of the steel tubular concrete column 1 through the connection plate 205 and the U-shaped steel brackets 3.
On one hand, since the concrete beam 2 is the precast concrete beam 2, the steel pipe 101 and the U-shaped steel corbel 3 of the steel pipe concrete beam 2 can also be fixedly connected in advance in a factory, and therefore, the connection between the U-shaped steel corbel 3 and the connecting plate 205 and the pouring of the column concrete 102 and the post-cast concrete 4 are only required to be performed in a construction site. Therefore, compared with the integral cast-in-place concrete filled steel tubular column-concrete beam frame structure, the connecting node 100 of the concrete filled steel tubular column and the concrete beam according to the embodiment of the invention has the advantages of small on-site wet work workload and small on-site construction workload, so that the construction period is shorter, and the construction quality is easier to ensure.
On the other hand, since the post-cast concrete 4 is cast in the post-cast cavity defined between the first end 204 of the concrete beam 2, the U-shaped steel corbel 3 and the wall of the steel tube 101, the force of the concrete beam 2 may be transmitted to the steel tube 101 of the concrete filled steel tube column 1 through the connecting plate 205, the U-shaped steel corbel 3 and also to the concrete filled steel tube column 1 through the post-cast concrete 4. And because the first section 1031 of the first connecting member 103 is located inside the steel tube 101 and is coated by the column concrete 102, and the second section 1032 of the first connecting member 103 is located outside the steel tube 101 and is coated by the post-cast concrete 4, the force of the post-cast concrete 4 can be more transmitted to the column concrete 102 of the steel tube concrete column 1 through the first connecting member 103, and thus, the force of the concrete beam 2 can be more directly transmitted to the column concrete 102 of the steel tube concrete column 1 through the post-cast concrete 4 and the first connecting member 103, thereby reducing the stress of the steel tube 101. Therefore, compared with a full-assembly type steel pipe concrete column-concrete beam frame structure, the integral rigidity of the connecting joint can be greatly improved, and the improvement of the earthquake-resistant performance of a building is facilitated. In addition, because the stress of the steel tube 101 is less, the steel tube 101 with a thinner tube wall can be used for the steel tube concrete column 1, and the material cost is saved.
Therefore, the connection node 100 of the concrete filled steel tubular column and the concrete beam according to the embodiment of the present invention has the advantages of short construction period, easy guarantee of construction quality, good earthquake resistance, low cost, etc.
Hereinafter, a concrete filled steel tubular column and concrete beam connecting node 100 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, a connection node 100 for a concrete filled steel tubular column and a concrete beam according to an embodiment of the present invention includes a concrete filled steel tubular column 1, a concrete beam 2, a U-shaped steel bracket 3, and post-cast concrete 4.
The steel tube concrete column 1 is a pouring type concrete column, the steel tube concrete column 1 comprises a steel tube 101, column concrete 102 and a first connecting piece 103, and the column concrete 102 is poured in the steel tube 101. The pipe wall of the steel pipe 101 is provided with a first connecting hole 1011 penetrating through the pipe wall in the inward and outward directions, the first connecting piece 103 penetrates through the first connecting hole 1011, the first connecting piece 103 comprises a first section 1031 and a second section 1032, the first section 1031 is located in the steel pipe 101 and is coated by the column concrete 102, and the second section 1032 is located on the outer side of the steel pipe 101
Preferably, the column concrete 102 is high-strength concrete with a strength grade not lower than C60, thereby further improving the integrity of the connection node 100.
In some embodiments, the steel pipe 101 is a rectangular pipe, a first reinforcing plate 1016 is disposed between two adjacent side surfaces of the steel pipe 101, the first reinforcing plate 1016 is disposed in the steel pipe 101, the first reinforcing plate 1016 has a first connection portion and a second connection portion, the first connection portion is fixedly connected to one of the two adjacent side surfaces of the steel pipe 101, and the second connection portion is fixedly connected to the other of the two adjacent side surfaces of the steel pipe 101.
Therefore, the rigidity of the steel pipe 101 can be effectively increased by using the first reinforcing plate 1016, the load transmitted from the concrete beam 2 to the column concrete 102 is increased, and the integrity of the connection node 100 is enhanced.
Preferably, the first reinforcing plates 1016 are arranged in two layers at intervals in the up-down direction, the first reinforcing plate 1016 of the upper layer is located at the upper part of the connection node, and the first reinforcing plate 1016 of the lower layer is located at the lower part of the connection node. For example, the first reinforcing plate 1016 of the upper layer is positioned at the upper portion of the concrete beam 2, and the first reinforcing plate 1016 of the lower layer is positioned at the lower portion of the concrete beam 2.
In some embodiments, the steel tube 101 includes a cross batten 1015, four L-shaped steel plates 1013, and four channels 1014, each of the batten, the four L-shaped steel plates 1013, and the four channels 1014 extends in an up-down direction, the four L-shaped steel plates 1013 are sequentially spliced to form a rectangular tube, the four channels 1014 are respectively welded to four ends of the cross batten 1015, and one channel 1014 is welded between two adjacent L-shaped steel plates 1013.
From this, not only can serve as vertical stiffening rib through four channel-section steels 1014, increased steel pipe 101's rigidity, avoided the construction phase to pour the pipe wall buckling problem that post concrete 102 arouses, effectively reduce steel pipe 101's cross-section width-thickness ratio, can increase steel pipe 101 through cross lacing 1015 moreover to post concrete 102's constraint effect, be favorable to improving the wholeness of steel core concrete column 1. In addition, the steel pipe 101 with the built-in channel 1014 and the cross-shaped lacing 1015 can weaken the influence of the concrete pumping side wall pressure on the initial stress of the steel pipe 101.
Preferably, two adjacent L-shaped steel plates 1013 are welded to the corresponding channel 1014 by the same weld. Therefore, the welding process is reduced, the production efficiency of the steel pipe 101 is further improved, and the construction cost is further reduced.
Preferably, the L-shaped steel plate 1013 is a cold-formed high-strength thin-walled steel plate having a strength of not less than Q460. Therefore, the sectional area of the steel pipe concrete column 1 is effectively reduced.
The concrete beam 2 includes a first longitudinal rib 201 and a beam concrete 203, the first longitudinal rib 201 extends in an extending direction of the concrete beam, and the first longitudinal rib 201 is covered with the beam concrete 203. The concrete beam 2 has a first end 204 and a second end opposite in the extending direction of the concrete beam, the first end 204 is disposed adjacent to the steel pipe 101 opposite to the second end in the extending direction of the concrete beam, the first end 204 is disposed outside the steel pipe 101 and the first end 204 and the steel pipe 101 are spaced apart in the extending direction of the concrete beam, and a connection plate 205 is disposed at a lower end of the first end 204.
The concrete beam 2 is a precast concrete beam 2, and in some embodiments, as shown in fig. 4, the concrete beam 2 further includes a third longitudinal rib 202. Wherein the first muscle 201 of indulging is located the non-coincide part of concrete beam 2, and the first muscle 201 of indulging adopts prestressing strand, and the third is indulged the muscle 202 and is located the lower part of concrete beam 2, and the third is indulged the muscle 202 and is the anchor reinforcing bar. Therefore, the beam section height and midspan deflection can be reduced, the connection node 100 is suitable for a large-span structure, and the field hoisting efficiency can be further improved.
Preferably, the connecting plate 205 is connected to the third longitudinal rib 202 by welding. Thereby, an effective force transfer of the concrete beam 2 to the steel core concrete column 1 is achieved.
The U-shaped steel corbel 3 comprises a bottom plate 301 and two side plates 302, each of the bottom plate 301 and the two side plates 302 is fixedly connected with the pipe wall of the steel pipe 101, the first end portion 204 of the concrete beam 2 is located in the U-shaped steel corbel 3, and the connecting plate 205 is fixedly connected with the bottom plate 301. A rear pouring cavity is defined among the first end 204 of the concrete beam 2, the U-shaped steel corbels 3 and the wall of the steel pipe 101, and the rear pouring concrete 4 is poured in the rear pouring cavity and covers the second section 1032.
Preferably, the first end portion 204 includes a slope portion, so that the connection area of the post-cast concrete 4 and the first end portion 204 can be increased by using the slope portion, thereby being beneficial to further increasing the integrity of the connection node 100, increasing the load carrying proportion of the column concrete 102, and effectively avoiding the local buckling failure of the steel pipe 101 in the core region of the node.
Of course, in other embodiments, the first end portion may also be provided with a connecting groove with a notch facing the steel pipe, so that the connecting groove can be used to increase the connecting area of the post-cast concrete and the first end portion, which is beneficial to further increase the integrity of the connecting node 100.
Preferably, as shown in fig. 1, plug welding holes 3011 are formed in the bottom plate 301, and the connecting plate 205 and the bottom plate 301 are plug welded through the plug welding holes 3011, so that the connection stability of the connecting plate 205 and the bottom plate 301 is improved, and the force transmission reliability from the connecting plate 205 to the U-shaped steel bracket 3 is improved.
Preferably, the first connector 103 is a peg.
Preferably, the outer circumferential surface of the first connector 103 is disposed spaced apart from the hole wall of the first connection hole 1011. Therefore, the column concrete 102 can flow out of the steel pipe 101 through the interval between the first connecting piece 103 and the hole wall of the first connecting hole 1011, so that the column concrete 102 and the post-cast concrete 4 can be integrally formed by one-time casting, and the overall rigidity and the seismic performance of the connecting node 100 can be further improved.
In some embodiments, the first connecting member 103 is provided in plurality, and the plurality of first connecting members 103 are arranged at intervals in the up-down direction. Therefore, more force of the concrete beam 2 can be directly transmitted to the column concrete 102 of the steel tube concrete column 1 through the post-cast concrete 4 and the first connecting piece 103, the stress of the steel tube 101 is further reduced, and the improvement of the earthquake-resistant performance of the building and the saving of the material cost of the building are further facilitated.
In some embodiments, the first connection hole 1011 is an elongated hole extending in the up-down direction, and each of the plurality of first connectors 103 is disposed in the same first connection hole 1011. Therefore, the number of the first connecting holes 1011 is small, so that the steel pipe connecting structure is convenient to process and manufacture, the production efficiency of the steel pipe 101 is further improved, and the construction cost is further reduced.
In some embodiments, the steel pipe concrete column 1 further includes a second connecting member 104, a second connecting hole penetrating through the pipe wall in the inward and outward direction is formed in the pipe wall of the steel pipe 101, the second connecting hole and the first connecting hole 1011 are arranged at intervals in the circumferential direction of the steel pipe 101, the second connecting member 104 penetrates through the second connecting hole and is connected with the hole wall of the second connecting hole, the second connecting member 104 includes a third section 1041 and a fourth section 1042, the third section 1041 is located in the steel pipe 101 and is coated by the column concrete 102, and the fourth section 1042 is located outside the steel pipe 101 and is coated by 4 sections of post-cast concrete.
Thus, the second connector 104 can increase the interface interaction between the post-cast concrete 4 and the wall of the steel pipe 101, which is beneficial to further improving the integrity of the connection node 100. In addition, the combined action of the concrete beam 2 and the post-cast concrete 4 can be further increased by using the second connecting piece 104, so that the load bearing proportion of the column concrete 102 can be further increased, and the local buckling of the pipe wall of the steel pipe 101 can be further effectively avoided.
Preferably, the post-cast concrete 4 is high-strength concrete with a strength grade not lower than C60, thereby further improving the integrity of the connection node 100.
Preferably, the second connector 104 is a penetration type shear pin.
Preferably, the second connection member 104 is provided in plurality, and the plurality of second connection members 104 are provided at intervals in the up-down direction. Thereby, it is advantageous to further improve the integrity of the connection node 100.
In some embodiments, the connection node 100 further includes a floor slab 5, the floor slab 5 is a cast-in-place floor slab 5, the floor slab 5 is disposed on an upper portion of the concrete beam 2, the floor slab 5 includes a second longitudinal rib 501 and a floor slab concrete 502, the second longitudinal rib 501 extends along an extending direction of the concrete beam, the beam stirrup 206 includes a first portion and a second portion, the first portion is covered by the beam concrete 203, the second portion extends upward out of the beam concrete 203 and is fixedly connected with the second longitudinal rib 501, a through hole 105 is formed in a wall of the steel pipe 101 and penetrates through the wall in an inner and outer direction, the second longitudinal rib 501 passes through the through hole 105, the second longitudinal rib 501 includes a fifth section 5011 and a sixth section 5012, the fifth section 5011 is located in the steel pipe 101 and is covered by the column concrete 102, the sixth section 5012 is located outside the steel pipe 101 and is covered by the floor slab concrete 502, and the second portion is covered by the floor slab concrete 502.
The second is indulged muscle 501 and is located the coincide part of concrete beam 2 and floor 5, and the muscle 501 is indulged to floor 5 and concrete beam 2 sharing second promptly, and the second is indulged muscle 501 and is passed node core area through perforation 105, from this, can further strengthen connected node 100's wholeness, has weakened concrete beam 2 and floor 5 juncture reinforcing bar crowded phenomenon densely, is favorable to further improving the anti-seismic performance of building.
In some embodiments, the second longitudinal rib 501 is a non-prestressed longitudinal rib.
In some embodiments, a stiffening grid 106 is disposed at the through hole 105, and the stiffening grid 106 is located outside the steel pipe 101 and is fixedly connected to the wall of the steel pipe 101. Thus, the use of the stiffening grid 106 effectively reduces the adverse effects of the perforations 105 on the pipe wall.
In some embodiments, each of the concrete beams 2 and the U-shaped steel brackets 3 is provided in plurality, the plurality of concrete beams 2 and the plurality of U-shaped steel brackets 3 are in one-to-one correspondence, the plurality of U-shaped steel brackets 3 are arranged at intervals along the circumferential direction of the steel pipe 101, a second reinforcing plate 303 is provided between two adjacent U-shaped steel brackets 3, the second reinforcing plate 303 has a third connecting portion and a fourth connecting portion, the third connecting portion is fixedly connected with one of the two adjacent U-shaped steel brackets 3, and the fourth connecting portion is fixedly connected with the other of the two adjacent U-shaped steel brackets 3.
Thereby, the integrity of the connection node 100 may be effectively enhanced. Preferably, the second reinforcing plates 303 are arranged in two layers at intervals in the up-down direction, the second reinforcing plate 303 at the upper layer is located at the upper part of the connection node, and the second reinforcing plate 303 at the lower layer is located at the lower part of the connection node. For example, the second reinforcing plate 303 at the upper layer is positioned at the upper part of the U-shaped steel bracket 3, and the second reinforcing plate 303 at the lower layer is positioned at the lower part of the U-shaped steel bracket 3.
For example, as shown in fig. 1 to 4, the connection node is a middle node, four concrete beams 2 and four U-shaped steel brackets 3 are provided, four concrete beams 2 and four U-shaped steel brackets 3 correspond to each other one by one, and the four concrete beams 2 are uniformly distributed along the circumferential direction of the steel pipe 101. Correspondingly, each of the first connecting members 103, the first connecting holes 1011, the second connecting members 104 and the second connecting holes is provided in four groups, and the four groups of the first connecting members 103, the four groups of the first connecting holes 1011, the four groups of the second connecting members 104, the four groups of the second connecting holes, the four concrete beams 2 and the four U-shaped steel brackets 3 are in one-to-one correspondence.
Preferably, as shown in fig. 1 and 3, each set of first connectors 103 is provided in two rows, and the two rows of first connectors 103 corresponding to the same concrete beam 2 are symmetrically provided; each set of the second connecting members 104 is also provided in two rows, and the two rows of the second connecting members 104 corresponding to the same concrete beam 2 are symmetrically provided.
Of course, in other embodiments, the connection node may also be an edge node, in which case, there are three concrete beams 2 and three U-shaped steel brackets 3 each, and the three concrete beams 2 and the three U-shaped steel brackets 3 correspond to each other one by one, and the three concrete beams 2 are uniformly distributed along the circumferential direction of the steel pipe 101. Correspondingly, each of the first connecting piece 103, the first connecting hole 1011, the second connecting piece 104 and the second connecting hole is provided with three groups, and the three groups of the first connecting pieces 103, the three groups of the first connecting holes 1011, the three groups of the second connecting pieces 104, the three groups of the second connecting holes, the three concrete beams 2 and the three U-shaped steel brackets 3 are in one-to-one correspondence.
In still other embodiments, the connection node may also be an angle node, in which case, there are two concrete beams 2 and two U-shaped steel brackets 3 each, and there are two concrete beams 2 and two U-shaped steel brackets 3 in one-to-one correspondence, and the two concrete beams 2 are uniformly distributed along the circumferential direction of the steel pipe 101. Correspondingly, each of the first connecting pieces 103, the first connecting holes 1011, the second connecting pieces 104 and the second connecting holes is provided with two sets, and the two sets of the first connecting pieces 103, the two sets of the first connecting holes 1011, the two sets of the second connecting pieces 104, the two sets of the second connecting holes, the two concrete beams 2 and the two U-shaped steel brackets 3 are in one-to-one correspondence.
The construction method of the connection node 100 according to the embodiment of the present invention includes the steps of:
prefabricating the concrete beam 2 in a factory, and arranging a connecting plate 205 at the first end 204 of the concrete beam 2;
the steel pipe 101 is manufactured in a factory, the U-shaped steel corbel 3 is fixedly welded on the pipe wall of the steel pipe 101, a first connecting hole 1011, a second connecting hole and a through hole 105 are formed in the steel pipe 101, a second connecting piece 104 is welded at the second connecting hole, and a stiffening grid 106 is fixedly connected at the through hole 105;
erecting a steel pipe 101 on a construction site;
hoisting the concrete beam 2, placing the concrete beam 2 on the U-shaped steel bracket 3, and fixedly connecting the connecting plate 205 with the bottom plate 301;
laying a second longitudinal bar 501 on a construction site, and fixing a first connecting piece 103 in a first connecting hole 1011;
pouring the column concrete 102 and the post-cast concrete 4, wherein the column concrete 102 and the post-cast concrete 4 are integrally formed;
and pouring floor slab concrete 502 at the overlapped part of the concrete beam 2 and the floor slab 5.
After the above steps are completed, after the concrete is cured to the specified strength, the subsequent construction process can be continued.
The processing sequence of the steel pipe 101 is: four channel beams 1014 are respectively welded at four ends of the cross batten 1015, and then the channel beams 1014 and the two corresponding L-shaped steel plates 1013 are welded and fixed through a long welding seam.
The first connecting member 103 may be positioned in the first connecting hole 1011 by a locator or a wire.
After the steel pipe 101 is erected at a construction site, the steel pipe 101 and the U-shaped steel corbels 3 fixed on the steel pipe 101 serve as construction supports and formworks. After the post-cast concrete 4 is poured, the U-shaped steel bracket 3, the post-cast concrete 4 and the concrete beam 2 share the load in the use stage.
Preferably, a part of the beam stirrup 206 of the concrete beam 2 extends upward out of the beam concrete, the part of the beam stirrup 206 is fixedly connected with the second longitudinal bar 501, and the part of the beam stirrup 206 is covered by the floor slab concrete 502.
According to the connecting node 100 provided by the embodiment of the invention, the high bearing characteristics of the high-strength steel pipe and the prestressed concrete are fully exerted, the load bearing proportion of the column concrete is effectively increased after the steel pipe in the core area of the node is provided with the connecting hole and the stud, the problem of local buckling of the high-strength thin-wall steel pipe in the node area is avoided, and the integral working performance of the node is ensured by pouring the column concrete in situ and pouring the concrete afterwards. The defects of large size, heavy self weight, difficulty in quick construction or poor integrity of the traditional cast-in-place or fully assembled concrete filled steel tubular column-concrete can be effectively overcome. The construction efficiency and the structural performance of the concrete filled steel tubular column-concrete beam mixed structure are effectively improved, and the concrete filled steel tubular column-concrete beam mixed structure is applied to logistics, storage, industrial plants and other multi-layer buildings, has better economic benefits and technical advantages, and has wide prospect.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
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