CN114962164A - T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower barrel - Google Patents
T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower barrel Download PDFInfo
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- CN114962164A CN114962164A CN202210859736.9A CN202210859736A CN114962164A CN 114962164 A CN114962164 A CN 114962164A CN 202210859736 A CN202210859736 A CN 202210859736A CN 114962164 A CN114962164 A CN 114962164A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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Abstract
The invention discloses a T-shaped connected concrete-filled steel tube bundle fan tower with built-in stiffening ribs, wherein the cross section of the bundle fan tower is in a hollow round corner rectangle, the bundle fan tower comprises a plurality of tower sections which are sequentially connected along the height direction of the bundle fan tower, and the diameters of the tower sections are reduced along the height direction of the bundle fan tower; the system can be prefabricated in a factory, splicing is carried out on site, time can be saved, efficiency is improved, higher fatigue resistance can be achieved, actual requirements can be met, and the industrialization process of the fan tower can be greatly promoted.
Description
Technical Field
The invention relates to the technical field of wind power generation tower cylinder structures, in particular to a T-shaped connected steel pipe concrete bundle fan tower cylinder with built-in stiffening ribs.
Background
The development of the traditional wind power resource advantage region in China gradually saturates, and the gravity center of the wind power development begins to shift to the low wind speed region. In order to improve the energy utilization rate and better develop wind power resources, the generated energy of the unit in a low wind speed area needs to be improved by lengthening blades and increasing the height of a fan. Based on this, larger impeller diameters and taller towers have become the main trend in wind power development, which results in increased total weight of the nacelle and blades, increased diameter, height and weight of the tower. Traditional fan tower section of thick bamboo adopts the all steel construction, makes the structure become gentle along with fan tower section of thick bamboo height's increase, makes the structure have safety problems such as resonance and swing on the one hand, and on the other hand also makes tower section of thick bamboo cost sharply increase, is difficult to adapt to market demand.
Disclosure of Invention
The invention aims to provide a T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower cylinder, which can be prefabricated and processed in a factory and spliced on site, not only can save time and improve efficiency, but also has higher fatigue resistance, can meet actual requirements and can greatly promote the industrialization process of the fan tower cylinder.
The technical scheme adopted by the invention is that the T-shaped connected concrete-filled steel tube bundle fan tower cylinder with built-in stiffening ribs is characterized in that the cross section of the fan tower cylinder is in a hollow round-corner rectangle, the fan tower cylinder comprises a plurality of tower sections which are sequentially connected along the height direction of the fan tower cylinder, and the diameters of the tower sections are reduced along the height direction of the fan tower cylinder.
The invention is also characterized in that:
the tower section comprises 4 ribbed concrete-filled steel tube bundle cylinder bodies, wherein the 4 ribbed concrete-filled steel tube bundle cylinder bodies are connected, and the cross section of the 4 ribbed concrete-filled steel tube bundle cylinder bodies is a hollow rounded rectangle;
the ribbed concrete filled steel tube bundle cylinder body comprises an arc concrete filled steel tube bundle cylinder body unit, two ends of the arc concrete filled steel tube bundle cylinder body unit are connected with rectangular concrete filled steel tube bundle cylinder body units, and adjacent ribbed concrete filled steel tube bundle cylinder bodies in the tower section are connected through the rectangular concrete filled steel tube bundle cylinder body units;
the arc concrete filled steel tube bundle barrel body unit and the rectangular concrete filled steel tube bundle barrel body unit are respectively formed by butting U-shaped steel plates to form an arc cavity and a rectangular cavity, and concrete is filled in the arc concrete filled steel tube bundle barrel body unit and the rectangular concrete filled steel tube bundle barrel body unit;
a plurality of longitudinal stiffening ribs and a plurality of transverse stiffening ribs are uniformly arranged in the arc-shaped concrete-filled steel tube bundle barrel body unit and the rectangular concrete-filled steel tube bundle barrel body unit;
one end of the rectangular concrete filled steel tube bundle barrel body unit, which is far away from the arc concrete filled steel tube bundle barrel body unit, is welded with a connecting plate, and a connecting plate rib plate is arranged in the connecting plate;
wherein the ribbed steel pipe concrete bundle barrel also all is equipped with the connecting plate at hoop and fore-and-aft tip, and adjacent ribbed steel pipe concrete bundle barrel passes through the connecting plate and links to each other, and adjacent connecting plate passes through bolt-up connection and forms T type node.
The invention has the advantages that
The main body structure of the T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower cylinder is formed by the concrete filled steel tube bundles, can fully exert the performance of steel and concrete, has the advantages of high bearing capacity, high rigidity, good stability and the like, can effectively bear the complex load borne by the wind power tower cylinder, is suitable for a high tower structure, breaks through the design height of the traditional pure steel tower cylinder, and simultaneously avoids the defects of vortex-induced vibration, large swing amplitude, prominent fatigue problem and the like of the traditional pure steel tower cylinder;
the concrete filled in the steel tube cavity is not required to be provided with reinforcing steel bars, so that the concrete is convenient to pour, the steel tube bundle can be directly used as a supporting structure of the concrete, the steps of formwork supporting and formwork removing of the concrete are omitted, the construction period is short, and the economical efficiency is good. The transverse stiffening ribs and the longitudinal stiffening ribs are arranged in the steel pipe bundle, so that the bonding force between the steel pipe bundle and the concrete is enhanced, the slippage between the steel pipe bundle and the concrete is avoided, and meanwhile, the bearing capacity and the stability of the structure are enhanced by the stiffening ribs, and the steel pipe bundle is prevented from being bulged and bent;
the tower barrel is prefabricated in a split mode and assembled on site, so that the limitation of transportation size and hoisting weight is broken through, and transportation and construction are facilitated; all components are manufactured in a factory, so that the quality of the components is improved, on-site wet operation is avoided, and the construction period is short. The adjacent cylinder bodies are connected through the bolts to form T-shaped connecting nodes, the connecting mode is simple, only the assembly of high-strength bolts is needed to be completed on a construction site, the installation is convenient, the installation steps are greatly simplified, the installation speed is greatly accelerated, and the construction efficiency is improved;
the force transmission between the upper barrel body and the lower barrel body is definite, and the stress concentration phenomenon is avoided, so that the plastic hinge in the structure moves outwards; through setting up the connecting plate floor, the regional rigidity of connection node and anti deformability have obtained big promotion. The advantages of high strength, good elastoplasticity and high compressive strength of the concrete of the steel are fully utilized, the rigidity is high, the bearing capacity is high, and the manufacturing cost is low.
Drawings
FIG. 1 is a schematic overall view of a T-shaped connection built-in stiffening rib concrete-filled steel tube bundle wind turbine tower according to the present invention;
FIG. 2 is a schematic cross-sectional view of a T-shaped joint concrete-filled steel tube bundle wind turbine tower with internal stiffening ribs according to the present invention;
FIG. 3 is a schematic structural view of a single-piece barrel body of a T-shaped connected reinforced concrete-filled steel tube bundle fan tower barrel with built-in stiffening ribs according to the present invention;
FIG. 4 is a schematic view of a portion of the area A of FIG. 1 illustrating a connection node according to the present invention;
FIG. 5 is a schematic view of the section a-a in FIG. 4;
FIG. 6 is a schematic structural view of a section b-b in FIG. 4;
FIG. 7 is a simplified calculation diagram of a model established by mechanical analysis in a T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower cylinder according to the present invention;
FIG. 8 is a simulation analysis diagram of a connection node under out-of-plane loading in a T-shaped connection built-in stiffening rib concrete-filled steel tube bundle fan tower cylinder according to the present invention;
FIG. 9 is a simulation analysis diagram of a connection node under in-plane loading in a T-shaped connection built-in stiffening rib concrete-filled steel tube bundle wind turbine tower according to the present invention.
In the figure, 1, a ribbed steel tube concrete beam barrel body; 2. a vertical connection node; 3. connecting nodes in a circumferential direction; 4. the rectangular steel tube concrete bundle barrel unit; 5. an arc-shaped steel pipe concrete beam barrel body unit; 6. concrete; 7. a steel plate; 8. a connecting plate; 9. a bolt; 10. a longitudinal stiffener; 11. a rib plate of the connecting plate; 12. a transverse stiffener.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a T-shaped connected concrete-filled steel tube bundle fan tower cylinder with built-in stiffening ribs, which is formed by assembling 4 steel tube concrete bundle cylinder bodies 1 with ribs in an annular direction through annular connecting nodes 3 as shown in figure 1, and sequentially assembling the steel tube concrete bundle cylinder bodies upwards through vertical connecting nodes 2 along the height direction to form an integral combined structure fan tower cylinder;
as shown in fig. 1, the number of tower segments in the height direction is only schematic, and the number of tower segments can be increased or decreased according to actual engineering conditions, while the diameter of the tower can be continuously shrunk along with the increase of the height;
as shown in figure 2, the cross section of the cylinder body of the invention is integrally in a hollow round corner rectangle shape, and the cylinder body is formed by assembling 4 pieces of ribbed concrete-filled steel tube bundle cylinder bodies 1 through connecting plates 8 and bolts 9. The steel plate 7 is arranged outside the ribbed steel tube concrete bundle barrel body 1, and concrete 6 is filled inside the ribbed steel tube concrete bundle barrel body; each ribbed concrete filled steel tube bundle cylinder body 1 consists of 1 arc concrete filled steel tube bundle cylinder body unit 5 and 2 rectangular concrete filled steel tube bundle cylinder body units 4;
as shown in fig. 3, the ribbed steel tube concrete bundle barrel 1 is specifically formed by welding U-shaped steel plates on two sides of an arc-shaped steel plate respectively, and arranging longitudinal stiffening ribs 10 and transverse stiffening ribs 12 on the inner sides of the steel plates, so as to form 1 arc-shaped cavity and 2 rectangular cavities, and then filling concrete 6 into the cavities to form 1 arc-shaped steel tube concrete bundle barrel unit 5 and 2 rectangular steel tube concrete bundle barrel units 4; connecting plates 8 are welded on two sides of the rectangular steel tube concrete beam barrel body unit 4, and connecting plate rib plates 11 are arranged to connect the barrel body;
as shown in fig. 4, the end of the ribbed concrete-filled steel tube bundle barrel 1 is provided with connecting plates 8 in the circumferential direction and the longitudinal direction, and a connecting plate rib plate 11 is connected with the ribbed concrete-filled steel tube bundle barrel 1 and the connecting plates 8 to play a role in reinforcing the node. The adjacent ribbed concrete filled steel tube bundle cylinder bodies 1 are fastened and connected through a connecting plate 8 by using bolts 9 to form T-shaped nodes;
the number of bolts shown as a-a and b-b in fig. 5 and 6 is only illustrative and can be increased or decreased according to the actual engineering situation.
The above embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and a person skilled in the art may make several modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The mechanical analysis is carried out on the T-shaped connection built-in stiffening rib concrete-filled steel tube bundle fan tower cylinder of the invention as follows:
in view of the innovativeness of the invention, corresponding specifications and engineering research are rarely related, so that according to the structural characteristics of the invention, one embodiment is selected for mechanical property analysis, and further reference is provided for engineering application of the invention;
analyzing by using abaqus finite element analysis software; the tower barrel belongs to an axisymmetric structure and integrally bears the effects of pressure, bending moment, shearing force and torque, if the whole tower barrel is subjected to modeling analysis, the calculation efficiency is low and the cost is high, so that a rectangular concrete-filled steel tube bundle barrel body unit is selected for simulation analysis, loads can be combined with Fz and Mx, Fz and My, and Mx and My can be simplified into shearing forces Fx and Fy acting on the top of a wall body; the specific model calculation diagram is shown in FIG. 7, the steel material of the selected embodiment is Q235, the concrete is C30, and the specific dimensions of each part are shown in Table 1; according to the high-rise structural design standard GB50135-2019, when nonlinear analysis is carried out on a structural tower, the limit values of the overall horizontal displacement angles of the self-standing steel structural tower and the self-standing concrete structural tower are 1/50 and 1/100 respectively, the loading is carried out on the self-standing steel structural tower and the self-standing concrete structural tower respectively by the in-plane displacement and the out-of-plane displacement according to the building earthquake-resistant design standard GB50011-2010, the loading displacement is large, and the analysis result is reliable;
TABLE 1 detailed dimensions of the components
Out-of-plane loading:
and calculating the connecting node under the out-of-plane loading to obtain that the yield load is 122.94kN, the yield displacement is 26.42mm, and the initial rigidity value of the node test piece is only 4.65kN/mm, which indicates that the out-of-plane rigidity of the node is small.
Through simulation analysis of the connection node under the out-of-plane loading, as can be seen from fig. 8, the connection section mainly has significant stress changes around the bolt hole and the rib plate of the connection plate, the maximum stress value reaches 413.8MPa, and the stress values of other parts are small; stress change at the high-strength bolt screw close to one side of the web plate of the connecting plate is obvious, the maximum stress value reaches 943.4MPa, and stress change of the nut and the high-strength bolt at the other side is small, mainly because stress concentration occurs at the bolt rod and the bolt hole, so that stress of the bolt rod is increased, but the limit strength of the bolt is not exceeded. The maximum principal stress of the concrete is 4.112MPa, which is less than 4.62MPa of ultimate tensile strength, the maximum plastic strain of the concrete is 0.0012, which is much less than the specified 0.015 ultimate strain of the concrete material, and the maximum strain in tension damage of the concrete is 0.926, which is less than the specified 1.0 ultimate strain of damage, which indicates that the concrete component has not been subjected to cracking failure.
In-plane loading:
performing simulation calculation on the connection node loaded in the plane to obtain that the yield load is 519.97kN, the yield displacement is 10.42mm, and calculating the initial rigidity value of the node test piece to be as high as 49.27kN/mm, which shows that the rigidity in the plane of the node is larger and can resist larger unfavorable deformation;
through the simulation calculation of the connection node under the in-plane loading, as can be seen from fig. 9, the stress change at the connection plate on the tension side of the node area and the bolt hole is obvious, the deformation is obvious, the maximum stress value reaches 470MPa, and the rib plate of the connection plate on the compression side of the node area has obvious bending deformation, the main reason is that the rib plate bears the combined action of tension and pressure, the combination is used on the compression side of the node area to be the maximum, the flange of the connection plate bears the bending moment load, and the maximum bending moment value appears on the tension side of the node area; the high-strength bolt on the tension side of the node area has larger stress, the axial deformation of the screw is obvious, the maximum stress value reaches 1000MPa, and the stress on the compression side is smaller. The maximum principal stress of the concrete reaches 2.47MPa and is far less than the ultimate tensile strength of 4.62MPa, the maximum plastic strain of the concrete is 0.00047 and is far less than the specified ultimate strain of the concrete material of 0.015, and simultaneously the tensile damage strain of the concrete is 0.98 and is less than the specified ultimate damage strain of 1.0, which indicates that the concrete part has no cracking failure phenomenon.
The above examples are only one of the technical schemes of the invention, and in practical engineering application, parameters of each component can be correspondingly adjusted according to engineering conditions so as to meet requirements of different projects.
Claims (7)
1. The utility model provides a T type is connected and is built-in stiffening rib steel pipe concrete beam fan tower section of thick bamboo which characterized in that, the transversal hollow fillet rectangle of personally submitting of fan tower section of thick bamboo, fan tower section of thick bamboo include that a plurality of tower sections connect gradually along its direction of height, and reduce along its direction of height tower section diameter.
2. The T-shaped connected internally-stiffened concrete filled steel tube bundle wind turbine tower barrel according to claim 1, wherein the tower section comprises 4 ribbed concrete filled steel tube bundle barrel bodies (1), and the cross section of the tower section is a hollow rounded rectangle, wherein the 4 ribbed concrete filled steel tube bundle barrel bodies (1) are connected with each other.
3. The T-shaped internally-stiffened rib concrete filled steel tube bundle fan tower barrel according to claim 1, wherein the ribbed concrete filled steel tube bundle barrel body (1) comprises an arc concrete filled steel tube bundle barrel body unit (5) and a rectangular concrete filled steel tube bundle barrel body unit (4), the two ends of the arc concrete filled steel tube bundle barrel body unit (5) are respectively connected with the rectangular concrete filled steel tube bundle barrel body unit (4), and the adjacent ribbed concrete filled steel tube bundle barrel bodies (1) in the tower section are connected through the rectangular concrete filled steel tube bundle barrel body unit (4).
4. The T-shaped connection built-in stiffening rib concrete filled steel tube bundled wind turbine tower barrel as claimed in claim 3, wherein the arc-shaped concrete filled steel tube bundled barrel body unit (5) and the rectangular concrete filled steel tube bundled barrel body unit (4) are formed by butt joint of U-shaped steel plates to form an arc-shaped cavity and a rectangular cavity, and concrete (6) is filled in the arc-shaped concrete filled steel tube bundled barrel body unit (5) and the rectangular concrete filled steel tube bundled barrel body unit (4).
5. The T-shaped connected internally stiffened concrete filled steel tube bundle wind turbine tower as claimed in claim 4, wherein a plurality of longitudinal stiffeners (10) and a plurality of transverse stiffeners (12) are uniformly arranged in the arc concrete filled steel tube bundle barrel unit (5) and the rectangular concrete filled steel tube bundle barrel unit (4).
6. The T-shaped connection built-in stiffening rib concrete filled steel tube bundled wind turbine tower drum as claimed in claim 3, wherein a connecting plate (8) is welded at one end of the rectangular concrete filled steel tube bundled drum body unit (4) far away from the arc concrete filled steel tube bundled drum body unit (5), and a connecting plate rib plate (11) is arranged in the connecting plate (8).
7. The T-shaped connected internally-stiffened rib concrete filled steel tube bundle fan tower drum as claimed in claim 3, wherein the ribbed concrete filled steel tube bundle drum body (1) is also provided with connecting plates (8) at the circumferential end and the longitudinal end, the adjacent ribbed concrete filled steel tube bundle drum bodies (1) are connected through the connecting plates (8), and the adjacent connecting plates (8) are fastened and connected through bolts (9) to form T-shaped nodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210859736.9A CN114962164A (en) | 2022-07-21 | 2022-07-21 | T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower barrel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210859736.9A CN114962164A (en) | 2022-07-21 | 2022-07-21 | T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower barrel |
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| Publication Number | Publication Date |
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| CN114962164A true CN114962164A (en) | 2022-08-30 |
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| CN202210859736.9A Pending CN114962164A (en) | 2022-07-21 | 2022-07-21 | T-shaped connection built-in stiffening rib concrete filled steel tube bundle fan tower barrel |
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| CN (1) | CN114962164A (en) |
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- 2022-07-21 CN CN202210859736.9A patent/CN114962164A/en active Pending
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