CN116791958A - Flange connection node and hollow interlayer steel pipe concrete transmission pole - Google Patents
Flange connection node and hollow interlayer steel pipe concrete transmission pole Download PDFInfo
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- CN116791958A CN116791958A CN202310222545.6A CN202310222545A CN116791958A CN 116791958 A CN116791958 A CN 116791958A CN 202310222545 A CN202310222545 A CN 202310222545A CN 116791958 A CN116791958 A CN 116791958A
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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
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
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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
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
- E04H12/085—Details of flanges for tubular masts
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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
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
-
- 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
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
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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
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2253—Mounting poles or posts to the holder
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a flange connection node and a hollow interlayer steel tube concrete transmission pole, wherein the hollow interlayer steel tube concrete transmission pole comprises a flange connection node and a hollow interlayer steel tube concrete column connected with the flange connection node; the hollow sandwich steel tube concrete column comprises a second inner steel tube and a second outer steel tube which are coaxially sleeved, and a concrete filling layer is arranged between the second inner steel tube and the second outer steel tube; the bottom end of the second outer steel pipe is provided with an axial slot into which a stiffening rib in the flange connection node can be inserted. The invention can be connected with the flange connection node through the mounting groove in an assembled way, the hollow sandwich steel pipe concrete column and the connection node are mainly prefabricated in a factory, only the hollow sandwich steel pipe concrete column and the connection node are assembled on site, the construction efficiency can be obviously improved, the construction quality is ensured, the construction cost is reduced, and the technical problems of difficult cast-in-place concrete construction and integral transportation of the hollow sandwich steel pipe concrete transmission pole in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of engineering machinery, relates to a transmission tower, and in particular relates to a flange connection node and a hollow interlayer steel tube concrete transmission pole.
Background
Along with the rapid acceleration of the construction of the extra-high voltage power grid in China, the requirement of the large-scale increased extra-high voltage power grid on the transmission tower is also continuously improved. The bottom of the angle steel tower is developed and has good bearing performance, but the angle steel tower has complex structure, and the difficulties of design, processing and installation are increased, so that the steel consumption and the construction cost are increased. The steel pipe pole is used as a high-rise structure and has the advantages of high strength, small occupied area and the like, but the pipe wall is relatively thin, the whole flexibility is large, and local instability is easy to occur under the action of axial load. In order to meet the requirements of deflection and self stability, the tip diameter and the wall thickness of the steel pipe are required to be greatly increased, so that steel waste and engineering cost are caused.
The hollow sandwich steel pipe concrete structure fully exerts the inherent potential of steel and concrete, greatly improves the overall bearing capacity, stability and rigidity, and effectively overcomes the defect of stability of the steel pipe pole. At present, the spliced node of the hollow sandwich steel pipe concrete pole tower pole adopts an inner rigid flange and an outer rigid flange, and the inner and outer parts of the pole adopt rigid flanges, so that the internal structure is complex, bolts need to be screwed into the pole, the construction difficulty is high, the construction cost is high, and the potential safety hazard is large. In the prior art, the spliced joint is connected with the inner steel pipe by adopting a necked forging flange structure, so that the problem that constructors enter a hollow interlayer for construction is solved, but the process requirement of the inner necked forging flange is higher, the manufacturing cost is higher than that of a common flange plate, the inner steel pipe is in butt joint with the flange neck, the outer steel pipe is connected with the surface of the forging flange plate, the force transmission of an annular welding seam is adopted, the requirement on the quality of the welding seam is high, and the processing difficulty is high.
Disclosure of Invention
The invention provides a flange connection node and a hollow interlayer steel tube concrete transmission pole to solve the technical problems of unstable welding quality, high corrosion prevention cost, difficult construction and the like of a connection node of a hollow interlayer steel tube concrete pole for a transmission line in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the flange connection node comprises a lower flange body and an upper flange assembly, wherein the upper flange assembly comprises an upper flange body which can be connected with the lower flange body, a first through hole is formed in the center of the upper flange body, a second through hole is formed in the center of the lower flange body, the first through hole and the second through hole are coaxially communicated,
a first inner steel pipe is vertically arranged on the upper flange plate body, a first outer steel pipe is coaxially sleeved outside the first inner steel pipe, and a hollow interlayer is formed between the first inner steel pipe and the first outer steel pipe;
a plurality of first stiffening ribs are uniformly distributed on the outer wall of the first inner steel pipe along the circumferential direction, and the first stiffening ribs penetrate out of the first outer steel pipe through first axial slots formed in the pipe wall of the first outer steel pipe;
a plurality of second stiffening ribs are uniformly distributed on the outer wall of the first outer steel pipe along the circumferential direction; the first stiffening ribs and the second stiffening ribs are alternately arranged;
a plurality of first self-tapping threaded holes are further formed in the first outer steel pipe wall between the first stiffening ribs and the second stiffening ribs in a vertical mode, and a plurality of second self-tapping threaded holes are formed in the first inner steel pipe wall in the circumferential direction.
The invention also has the following technical characteristics:
specifically, the first inner steel pipe comprises a plurality of inner arc plates which are distributed at equal intervals, and an installation seam is formed between every two adjacent inner arc plates.
Further, a first bolt connecting hole is formed in the upper flange plate body, and the first bolt connecting hole is formed in the periphery of the first through hole; the lower flange plate body is provided with a second bolt connecting hole, the second bolt connecting hole is arranged at the periphery of the second through hole, and the first bolt connecting hole and the second bolt connecting hole are coaxially and symmetrically arranged; fastening bolts are arranged in the first bolt connecting holes and the second bolt connecting holes in a penetrating mode.
Further, the lower end face of the first outer steel pipe and the lower end face of the inner arc plate are connected with the upper end face of the upper flange plate body.
Furthermore, the first stiffening rib and the second stiffening rib are triangular or trapezoidal.
The invention also protects a hollow interlayer steel pipe concrete transmission pole, which comprises the flange connection node and a hollow interlayer steel pipe concrete column connected with the flange connection node;
the hollow sandwich steel tube concrete column comprises a second inner steel tube and a second outer steel tube which are coaxially sleeved, and a concrete filling layer is arranged between the second inner steel tube and the second outer steel tube;
the bottom end of the second outer steel pipe is provided with a second axial slot into which the first stiffening rib can be inserted.
Further, the second outer steel pipe comprises a plurality of first curled cold-formed thin-wall steel units, and the adjacent first curled cold-formed thin-wall steel units are connected end to form a closed circular structure; the first hemming cold-formed thin-walled steel unit comprises a first arc-shaped section and a first hemming section which is turned inwards from one end of the first arc-shaped section.
Further, the second inner steel pipe comprises a plurality of second curled cold-formed thin-wall steel units, and adjacent second curled cold-formed thin-wall steel units are connected end to form a closed circular structure; the second hemming cold-formed thin-walled steel unit comprises a second arc section, and a second hemming section and a third hemming section which are respectively turned outwards from two ends of the second arc section.
Furthermore, a plurality of threaded bottom holes are formed in the pipe walls of the bottom ends of the second inner steel pipe and the second outer steel pipe along the circumferential direction.
Furthermore, the number of the second hemming cold-formed thin-walled steel units is the same as that of the inner arc plates, and the second hemming section and the third hemming section can penetrate out of the mounting seam.
Compared with the prior art, the invention has the beneficial effects that:
(1) The upper flange assembly formed by assembling the upper flange body, the first outer steel pipe, the first inner steel pipe, and the first stiffening ribs and the second stiffening ribs which are alternately arranged is convenient to assemble and use, the bottom of the first stiffening rib is welded with the upper flange body, the local stability of the inner steel pipe and the outer steel pipe is enhanced, and the connecting node has good strength and rigidity.
(2) The second outer steel tube and the second inner steel tube of the hollow sandwich steel tube concrete transmission pole are formed by splicing the thin-walled bent steel by means of self-tapping screws, the force transmission is reliable, the construction is convenient and fast, welding is not needed, and the technical problems that the connection quality of the hollow sandwich steel tube concrete transmission pole is unstable and the pole body is difficult to transport and hoist in the prior art are effectively solved.
(3) The hollow sandwich steel pipe concrete transmission pole can be connected with the flange connection node in an assembling manner through the mounting groove, the hollow sandwich steel pipe concrete column and the connection node are mainly prefabricated in a factory, only the hollow sandwich steel pipe concrete column and the connection node are assembled on site, the construction efficiency can be remarkably improved, the construction quality is ensured, the construction cost is reduced, and the technical problems that in the prior art, the hollow sandwich steel pipe concrete transmission pole is difficult in cast-in-place concrete construction and integral transportation are solved.
Other advantages of the present invention are described in detail in the detailed description.
Drawings
FIG. 1 is a schematic view of the upper flange assembly of embodiment 1;
FIG. 2 is a schematic diagram of the overall structure of a hollow sandwich concrete filled steel tube transmission pole;
FIG. 3 is a schematic view of a hollow sandwich steel core concrete column;
FIG. 4 is a top view of a hollow sandwich steel core concrete column;
FIG. 5 is a schematic view of the fixing of the lower end of a hollow sandwich concrete filled steel tube transmission pole;
FIG. 6 is a top view of the lower end of the hollow sandwich concrete filled steel tube transmission pole;
FIG. 7 is a graph showing a comparison of bending moment and displacement curves obtained in example 1;
FIG. 8 is a stress cloud of the components of the second outer steel pipe of the present invention when it starts to yield, wherein (a) is the second outer steel pipe, (b) is the sandwich concrete, (c) is the second inner steel pipe, (d) is the upper flange body, (e) is the bolt group, (f) is the flange connection node, and (g) is the hollow sandwich steel pipe concrete power transmission pole;
fig. 9 is a stress cloud contrast of the parts when the transmission rod loading displacement reaches 336mm, wherein (a) is the second outer steel pipe, (b) is the sandwich concrete, (c) is the second inner steel pipe, (d) is the upper flange plate body, (e) is the bolt group, (f) is the flange connection node, and (g) is the hollow sandwich steel pipe concrete transmission rod.
The reference numerals in the drawings illustrate:
the steel pipe concrete column comprises a 1-lower flange body, a 2-upper flange assembly, 3-fastening bolts, a 4-hollow sandwich steel pipe concrete column and a 5-threaded bottom hole;
21-an upper flange body, 22-a first inner steel pipe, 23-a first outer steel pipe and 24-a first stiffening rib;
221-second self-tapping screw holes, 222-inner arc plates, 223-mounting seams;
231-first axial slots, 232-second stiffeners, 233-first self-tapping threaded holes;
41-second inner steel pipes, 42-second outer steel pipes, 43-concrete filling layers;
411-a second hemming cold-formed thin-walled steel unit;
4111-second arcuate segment, 4112-second crimping segment, 4113-third crimping segment;
421-second axial slots, 422-first hemming cold-formed thin-walled steel units;
4221-first arcuate segment, 4222-first crimping segment.
Detailed Description
Specific examples of the present invention are given below. In the following description, unless explicitly stated or limited otherwise, terms such as "disposed," "connected," and the like should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either direct or indirect connection, etc. The specific meaning of the above terms in the present technical solution can be understood by those skilled in the art according to specific circumstances.
In the present invention, unless otherwise indicated, terms such as "upper, lower, bottom, top" and "inner, outer" are used to refer generally to the definition of the drawing figures and to the definition of the drawing figures.
The individual technical features described in the following specific embodiments may be combined in any suitable manner without contradiction, as long as they do not deviate from the idea of the invention and should also be regarded as the disclosure of the invention.
The components of the present invention are commercially available unless otherwise specified.
Example 1
According to the above technical scheme, as shown in fig. 1, the present embodiment discloses a flange connection node, a lower flange body 1 and an upper flange assembly 2, the upper flange assembly 2 includes an upper flange body 21 capable of being connected with the lower flange body 1, a first through hole is provided in the center of the upper flange body 21, a second through hole is provided in the center of the lower flange body 1, the first through hole is coaxially communicated with the second through hole,
the upper flange plate body 21 is vertically provided with a first inner steel pipe 22, a first outer steel pipe 23 is coaxially sleeved outside the first inner steel pipe 22, and a hollow interlayer is formed between the first inner steel pipe 22 and the first outer steel pipe 23;
a plurality of first stiffening ribs 24 are uniformly distributed on the outer wall of the first inner steel pipe 22 along the circumferential direction, and the first stiffening ribs 24 penetrate out of the first outer steel pipe 23 through first axial slots 231 formed in the pipe wall of the first outer steel pipe 23; the first stiffening rib 24 extends to a distance of 15-20 mm from the inner wall of the first inner steel pipe 22.
A plurality of second stiffening ribs 232 are uniformly distributed on the outer wall of the first outer steel pipe 23 along the circumferential direction; the first stiffeners 24 alternate with the second stiffeners 232; in this embodiment, the number of the first stiffeners 24 and the second stiffeners 232 is 8.
A plurality of first self-tapping screw holes 233 are also vertically distributed on the wall of the first outer steel pipe 23 between the first stiffening rib 24 and the second stiffening rib 232, and a plurality of second self-tapping screw holes 221 are circumferentially distributed on the wall of the first inner steel pipe 22. The first and second self-tapping screw holes 233 and 221 are used to pass through a self-tapping screw.
As a preferred embodiment of the present embodiment, the first inner steel pipe 22 includes four inner arc plates 222 arranged at equal intervals, and an installation slit 223 is formed between adjacent inner arc plates 222.
As a preferable scheme of the present embodiment, the upper flange body 21 is provided with a first bolt connection hole, and the first bolt connection hole is disposed at the periphery of the first through hole; the lower flange plate body 1 is provided with a second bolt connecting hole, the second bolt connecting hole is arranged at the periphery of the second through hole, and the first bolt connecting hole and the second bolt connecting hole are coaxially and symmetrically arranged; the first bolt connecting hole and the second bolt connecting hole are internally penetrated with a fastening bolt 3. The lower flange body 1 and the upper flange body 21 are fixed by fastening bolts 3.
As a preferable aspect of the present embodiment, the lower end surface of the first outer steel pipe 23 and the lower end surface of the inner arc plate 222 are both connected to the upper end surface of the upper flange body 21.
As a preferable mode of this embodiment, the first stiffener 24 and the second stiffener 232 are both triangular or trapezoidal in shape. The shape of the first stiffener 24 and the second stiffener 232 may also be configured as desired. The first stiffening rib 24 is preferably trapezoidal, and the second stiffening rib 232 is preferably triangular, so that the reinforcing effect can be achieved, and the material can be saved.
The use process of this embodiment is as follows:
the lower flange body 1 and the upper flange body 21 are fixed by fastening bolts 3, four inner arc plates 222 are arranged at the periphery of the first through hole to form a first inner steel pipe, a mounting seam 223 is formed between the adjacent inner arc plates 222, the first outer steel pipe 23 is welded and fixed on the upper flange body 21, and the first stiffening rib 24 penetrates out of the first outer steel pipe 23 through a first axial slot 231 formed on the pipe wall of the first outer steel pipe 23.
Example 2
As shown in fig. 2 and 3, the present embodiment provides a hollow sandwich steel pipe concrete power transmission pole, which comprises a flange connection node disclosed in embodiment 1, and a hollow sandwich steel pipe concrete column 4 connected with the flange connection node;
the hollow sandwich steel tube concrete column 4 comprises a second inner steel tube 41 and a second outer steel tube 42 which are coaxially sleeved, and a concrete filling layer 43 is arranged between the second inner steel tube 41 and the second outer steel tube 42;
the bottom end of the second outer steel pipe 42 is provided with a second axial slot 421 into which the first stiffener 24 can be inserted.
As a preferable scheme of the present embodiment, as shown in fig. 4, the second outer steel pipe 42 includes a plurality of first hemming cold-formed thin-walled steel units 422, and adjacent first hemming cold-formed thin-walled steel units 422 are connected end to form a closed circular structure; the first hemming cold-formed thin-walled steel units 422 include a first arc-shaped section 4221 and a first hemming section 4222 turned inward by one end of the first arc-shaped section 4221, and when the adjacent first hemming cold-formed thin-walled steel units 422 are connected end to form a closed circular structure, the adjacent first hemming cold-formed thin-walled steel units may be connected by self-tapping bolts.
As a preferable scheme of the present embodiment, the second inner steel tube 41 includes a plurality of second hemming cold-formed thin-walled steel units 411, and adjacent second hemming cold-formed thin-walled steel units 411 are connected end to form a closed circular structure; the second hemming cold-formed thin-walled steel unit 411 includes a second arc-shaped section 4111 and a second hemming section 4112 and a third hemming section 4113 respectively turned outwards from both ends of the second arc-shaped section 4111, and when the second hemming cold-formed thin-walled steel unit 411 is connected end to form a closed circular structure, adjacent second hemming cold-formed thin-walled steel units can be connected by self-tapping bolts.
As a preferable scheme of this embodiment, a plurality of threaded bottom holes 5 are formed on the pipe walls of the bottom ends of the second inner steel pipe 41 and the second outer steel pipe 42 along the circumferential direction. The threaded bottom hole 5 is used for penetrating a self-tapping screw to fix the inner tube and the outer tube.
As a preferred embodiment of the present embodiment, the number of the second hemming cold-formed thin-walled steel units 411 is four, which is the same as the number of the inner arc plates, and both the second hemming segment 4112 and the third hemming segment 4113 can be penetrated out from the installation slit 223.
When the embodiment is used, the following steps are adopted:
the second hemming section 4112 and the third hemming section 4113 of the four second hemming cold-formed thin-walled steel units 411 are respectively penetrated out of the four mounting joints 223, then the second inner steel pipe 41 and the first inner steel pipe 22 are connected by self-tapping screws, the second outer steel pipe 42 is formed by the four first hemming cold-formed thin-walled steel units 422, and then the first outer steel pipe 23 and the second outer steel pipe 42 are connected and fixed by self-tapping screws, thus completing the splicing assembly. Wherein the first outer steel pipe 23 is sleeved outside the second outer steel pipe 42, and the second inner steel pipe 41 is sleeved inside the first inner steel pipe 22.
Stress analysis
The stress condition of the flange connection node recorded by the invention is simulated and analyzed by finite element analysis software ABAQUS
(1) Model building
The invention adopts finite element software ABAQUS to carry out finite element simulation, suggests a hollow interlayer steel pipe concrete transmission pole model, and simultaneously establishes a conical ribbed hollow interlayer thin-wall steel pipe concrete transmission pole made of common hot rolled section steel as a comparison model.
And stress conditions of the flange connection nodes are mainly analyzed, the self-tapping screw connection mode is simplified during simulation analysis, and the geometric dimensions of the hollow sandwich steel tube concrete column and the geometric dimensions of the flange connection nodes are respectively shown in tables 1 and 2.
Table 1 geometric dimensions of hollow Sandwich concrete filled columns
Table 2 geometric dimensions of the flange connection nodes
In the constructed model, the second crimping section 4112 and the second crimping sectionThe three bead segments 4113 each have a width of 2/3 of the thickness of the concrete in the hollow interlayer, and the first bead segments 4222 each have a width of 2/3 of the thickness of the concrete in the hollow interlayer, the thickness being the same as the arcuate segments. The steel adopts an ideal elastic plastic model, the flange body 21, the first inner steel pipe 22 and the first outer steel pipe 23 are all made of Q420 steel, and the yield strength is f y 420MPa, 8.8-stage fastening bolt is used as fastening bolt, yield strength f y The steel elastic modulus e= 206000MPa, poisson ratio v=0.3, =640 MPa. The strength grade of the concrete is C50, and a plastic damage model is adopted. The friction coefficient between the hemming section and concrete, the first stiffening rib and concrete, the steel tube and concrete, the flange plate and concrete is 0.6, the friction coefficient between the upper flange plate body 21 and the lower flange plate body 1 and the fastening bolts 3 is 0.3, and the displacement load is applied to the top end of the hollow sandwich steel tube concrete transmission pole in consideration of the geometric nonlinearity and the contact nonlinearity of the transmission pole.
(2) Analysis of results
Finally, a load-displacement curve is obtained, and the bending moment-displacement curve comprises three stages: an elastic stage, an elastoplastic stage and a plastic stage. In the elastic stage, the bending moment and the displacement are linearly increased, the curve is basically a straight line, and the slope is larger; in the elastoplastic phase, the displacement growth speed is increased, the bending moment growth speed is reduced, the slope of a bending moment-displacement curve is continuously reduced, and the rigidity is obviously reduced; in the plastic stage, the displacement rapidly develops, the bending moment slowly decreases after reaching the peak point, and the curve is basically gentle.
As shown in FIG. 7, the bending moment-displacement curves of the model provided by the embodiment are very similar to those of the comparative model, and therefore, the connecting node provided by the embodiment has good stress performance.
When the displacement of the column top reaches 70.85mm, the second outer steel pipe 42 starts to generate a local yielding phenomenon at the top section of the first outer steel pipe 23, at this time, the middle lower part of the concrete interlayer 43 in the hollow interlayer steel pipe concrete column 4 is also subjected to yielding, the stress of the upper flange plate body 21 and the lower flange plate body 1 is smaller, the maximum stress of the fastening bolt reaches 587MPa, the yield strength is still not reached, and the stress cloud chart is shown in fig. 8.
When the displacement of the column top reaches 336mm, the tension side and the compression side of the second inner steel pipe 41 and the second outer steel pipe 42 yield in a large area, obvious recessions appear at the joint of the second inner steel pipe 41 and the second outer steel pipe 42 at the compression side, the whole flange does not reach the yield strength, the maximum stress is positioned at the tension side of the upper flange body 21, the maximum stress is 388MPa, the stress of the fastening bolt 3 at the tension side reaches the yield strength at the screw part, the maximum stress is 654MPa, at the moment, the maximum opening amount of the upper flange body 21 and the lower flange body 1 is 1.18mm, the second outer steel pipe is still in an elastoplastic stage, and the stress cloud chart is shown in fig. 9.
In summary, when the second inner steel pipe 41 and the second outer steel pipe 42 in the flange connection node and the concrete in the hollow sandwich steel pipe concrete column are first subjected to yielding, each part of the flange connection node is still in an elastic stage, and as displacement increases, large-area yielding occurs in the second inner steel pipe 41 and the second outer steel pipe 42, and the fastening bolts on the tension side yield, so that the lower flange body 1 and the upper flange body 21 are opened, the overall stress level of the flange is lower, and a larger safety margin is provided. Therefore, the flange connection node provided by the embodiment has enough safety guarantee.
Claims (10)
1. The flange connection node comprises a lower flange body (1) and an upper flange assembly (2), wherein the upper flange assembly (2) comprises an upper flange body (21) which can be connected with the lower flange body (1), a first through hole is formed in the center of the upper flange body (21), a second through hole is formed in the center of the lower flange body (1), the first through hole and the second through hole are coaxially communicated,
a first inner steel pipe (22) is vertically arranged on the upper flange plate body (21), a first outer steel pipe (23) is coaxially sleeved outside the first inner steel pipe (22), and a hollow interlayer is formed between the first inner steel pipe (22) and the first outer steel pipe (23);
a plurality of first stiffening ribs (24) are uniformly distributed on the outer wall of the first inner steel pipe (22) along the circumferential direction, and the first stiffening ribs (24) penetrate out of the first outer steel pipe (23) through first axial slots (231) formed in the pipe wall of the first outer steel pipe (23);
a plurality of second stiffening ribs (232) are uniformly distributed on the outer wall of the first outer steel pipe (23) along the circumferential direction; the first stiffening ribs (24) and the second stiffening ribs (232) are alternately arranged;
a plurality of first self-tapping threaded holes (233) are further formed in the pipe wall of the first outer steel pipe (23) between the first stiffening rib (24) and the second stiffening rib (232) in a vertical mode, and a plurality of second self-tapping threaded holes (221) are formed in the pipe wall of the first inner steel pipe (22) in a circumferential mode.
2. The flanged joint according to claim 1, characterized in that the first inner steel pipe (22) comprises a plurality of inner arc plates (222) arranged at equal intervals, and a mounting seam (223) is formed between adjacent inner arc plates (222).
3. The flange connection node according to claim 1, wherein the upper flange body (21) is provided with a first bolt connection hole, and the first bolt connection hole is arranged at the periphery of the first through hole; the lower flange plate body (1) is provided with a second bolt connecting hole, the second bolt connecting hole is arranged at the periphery of the second through hole, and the first bolt connecting hole and the second bolt connecting hole are coaxially and symmetrically arranged; fastening bolts (3) are arranged in the first bolt connecting holes and the second bolt connecting holes in a penetrating mode.
4. The flange connection node according to claim 1, wherein the lower end face of the first outer steel pipe (23) and the lower end face of the inner arc plate (222) are connected to the upper end face of the upper flange body (21).
5. The flanged joint according to claim 1, wherein the first stiffening rib (24) and the second stiffening rib (232) are triangular or trapezoidal in shape.
6. A hollow sandwich steel pipe concrete transmission pole comprising a flanged joint according to claims 1 to 5, and a hollow sandwich steel pipe concrete column (4) connected to the flanged joint;
the hollow sandwich steel tube concrete column (4) comprises a second inner steel tube (41) and a second outer steel tube (42) which are coaxially sleeved, and a concrete filling layer (43) is arranged between the second inner steel tube (41) and the second outer steel tube (42);
the bottom end of the second outer steel pipe (42) is provided with a second axial slot (421) into which the first stiffening rib (24) can be inserted.
7. The hollow, sandwich, concrete-filled steel tube transmission pole of claim 6 wherein said second outer steel tube (42) comprises a plurality of first hemmed, cold-formed thin-walled steel units (422), adjacent first hemmed, cold-formed thin-walled steel units (422) joined end-to-end to form a closed circular structure; the first hemming cold-formed thin-walled steel unit (422) comprises a first arc-shaped section (4221) and a first hemming section (4222) which is turned inwards from one end of the first arc-shaped section (4221).
8. The hollow sandwich steel pipe concrete power transmission pole of claim 6 wherein said second inner steel pipe (41) comprises a plurality of second hemmed cold-formed thin-walled steel units (411), adjacent second hemmed cold-formed thin-walled steel units (411) being joined end to form a closed circular structure; the second hemming cold-formed thin-walled steel unit (411) comprises a second arc-shaped section (4111), and a second hemming section (4112) and a third hemming section (4113) which are respectively turned outwards from two ends of the second arc-shaped section (4111).
9. The hollow sandwich steel pipe concrete transmission pole according to claim 6, wherein a plurality of threaded bottom holes (5) are formed in the pipe walls of the bottom ends of the second inner steel pipe (41) and the second outer steel pipe (42) along the circumferential direction.
10. The hollow sandwich concrete filled steel tube transmission pole of claim 8 wherein the number of second hemmed cold-formed thin-walled steel units (411) is the same as the number of inner arc plates and both the second hemming section (4112) and the third hemming section (4113) are capable of being threaded out of the mounting slot (223).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310222545.6A CN116791958A (en) | 2023-03-03 | 2023-03-03 | Flange connection node and hollow interlayer steel pipe concrete transmission pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310222545.6A CN116791958A (en) | 2023-03-03 | 2023-03-03 | Flange connection node and hollow interlayer steel pipe concrete transmission pole |
Publications (1)
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| CN104863272A (en) * | 2015-05-29 | 2015-08-26 | 重庆大学 | Special-shaped cold-bending thin-wall steel tube concrete column and cold-bending thin-wall box-type steel beam frame joint |
| CN105507136A (en) * | 2016-01-05 | 2016-04-20 | 武汉科技大学 | Repairable self-resetting concrete-filled steel tube column as well as implementation method and repairing method thereof |
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| CN214364429U (en) * | 2020-12-11 | 2021-10-08 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
| CN215671419U (en) * | 2021-05-26 | 2022-01-28 | 西安建筑科技大学 | A hollow interlayer concrete-filled steel tubular member and its splicing node |
| CN219548555U (en) * | 2023-03-03 | 2023-08-18 | 国网山东省电力公司电力科学研究院 | Flange connection node and hollow interlayer steel pipe concrete transmission pole |
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| CN104863272A (en) * | 2015-05-29 | 2015-08-26 | 重庆大学 | Special-shaped cold-bending thin-wall steel tube concrete column and cold-bending thin-wall box-type steel beam frame joint |
| CN105507136A (en) * | 2016-01-05 | 2016-04-20 | 武汉科技大学 | Repairable self-resetting concrete-filled steel tube column as well as implementation method and repairing method thereof |
| CN108560753A (en) * | 2018-04-20 | 2018-09-21 | 青岛理工大学 | Prefabricated intelligent node with energy consumption of particle damping chamber and its installation method |
| CN214364429U (en) * | 2020-12-11 | 2021-10-08 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
| CN215671419U (en) * | 2021-05-26 | 2022-01-28 | 西安建筑科技大学 | A hollow interlayer concrete-filled steel tubular member and its splicing node |
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