CN116695770A - Wind power foundation with self-resetting energy consumption function, wind power tower and application - Google Patents
Wind power foundation with self-resetting energy consumption function, wind power tower and application Download PDFInfo
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- CN116695770A CN116695770A CN202310922796.5A CN202310922796A CN116695770A CN 116695770 A CN116695770 A CN 116695770A CN 202310922796 A CN202310922796 A CN 202310922796A CN 116695770 A CN116695770 A CN 116695770A
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 86
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 158
- 239000010959 steel Substances 0.000 claims abstract description 158
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000006073 displacement reaction Methods 0.000 claims abstract description 9
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 27
- 238000004873 anchoring Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 11
- 230000035939 shock Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010008 shearing Methods 0.000 abstract description 12
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a wind power foundation with a self-resetting energy consumption function, a wind power tower and application. The steel foundation is arranged on the field and is configured to fix the wind power tower; the swinging mechanism is rotationally connected between the steel foundation and the bottom of the limiting basement; the self-resetting energy consumption supporting mechanism is rotatably arranged between the swinging mechanisms and between the steel foundation and the side wall of the foundation pit; the limiting mechanism is arranged in the foundation pit and is configured to limit the displacement of the steel foundation; the reeving rope is in a long rope shape, the lower end of the reeving rope is fixedly connected to the bottom of the steel foundation, and the upper end of the reeving rope is fixedly connected to the top of the wind power tower. The wind power foundation provided by the invention can limit the maximum shearing force and the overturning moment at the bottom of the tower, and improves the integrity and the stability of the tower. The wind power tower provided by the invention has good stability. The application of the wind power foundation in energy consumption and vibration reduction can effectively reduce structural damage after vibration and the like.
Description
Technical Field
The invention relates to the technical field of wind power structures, in particular to a wind power foundation with a self-resetting energy consumption function, a wind power tower and application of the wind power foundation with the self-resetting energy consumption function in energy consumption and vibration reduction.
Background
Along with the implementation of the promotion and green development concepts of the 'double carbon' targets, the wind power industry is continuously strong, and the wind power industry is continuously expanded to the earthquake-prone areas, and the severe earthquake test is faced.
The wind power foundation is an important structural part of the wind power generation tower, and not only needs to bear the whole upper load effect, but also needs to be transmitted under the condition of ensuring the safe and reliable structure. The stability and the post-earthquake recoverability of the foundation directly influence the safety and normal use of the whole wind turbine generator. In the existing foundation earthquake-resistant technology, a vibration reduction and isolation device is decoupled from a reference surface most often, and a plastic hinge is formed at the bottom to reduce the earthquake action of a main structure, reduce the dynamic response of the structure and ensure the safety of the structure. Under the action of earthquake, the wind power tower generates larger shearing and overturning moment on the base, and causes larger damage to the foundation. Meanwhile, as a high-flexibility structure, the high-order vibration mode of the wind power tower is not controlled by a designated basic plastic hinge mechanism, so that the dynamic response of the structure is amplified, and huge structural damage is caused.
It is important to develop a device or apparatus that can limit the maximum shear and overturning moment requirements of a wind tower structure to mitigate the high modal effects above the foundation and meet the seismic energy consumption and self-resetting requirements. Therefore, the wind power foundation with the self-resetting energy consumption function, the wind power tower and the application are significant.
Disclosure of Invention
The present invention is directed to solving one or more of the problems of the prior art, including the shortcomings of the prior art. For example, one of the purposes of the invention is to provide a wind power foundation with self-resetting energy consumption function, which can dissipate energy input into a wind power structure by an earthquake, realize self-resetting effect, effectively alleviate higher-order effect and reduce damage effect of the earthquake to the wind power tower structure.
In order to achieve the above object, according to one aspect of the present invention, there is provided a wind power foundation having a self-resetting energy consuming function, the wind power foundation may include a steel foundation, a rocking mechanism, a self-resetting energy consuming support mechanism, a limiting mechanism, and a reeving, wherein the steel foundation is provided on a site and is configured to fix a wind power tower; the swinging mechanism is rotationally connected between the steel foundation and the bottom of the foundation pit; the self-resetting energy consumption supporting mechanism is rotatably arranged between the swinging mechanisms and between the steel foundation and the inner side wall of the foundation pit; the limiting mechanism is arranged in the foundation pit and is configured to limit the displacement of the steel foundation; the whole rope is in a long rope shape, the lower end of the rope is fixedly connected to the bottom of the steel foundation, and the upper end of the rope is fixedly connected to the top of the wind power tower.
According to an exemplary embodiment of an aspect of the present invention, the steel foundation may include a steel cap, a foundation ring, a variable friction energy dissipation ring, an adapter, and a stiffener, wherein the steel cap is a rectangular platform disposed on a site, and a portion thereof is located in a foundation pit; the foundation ring and the variable friction energy dissipation ring are both arranged on the steel bearing platform, and the variable friction energy dissipation ring is positioned in the foundation ring and is used for fixing the bottom of the wind power tower; the inner surface of the foundation ring is in a wave shape, and the outer surface of the friction-changing energy-consuming ring is in a wave shape and is matched with the wave shape of the inner surface of the foundation ring; the base ring is provided with through holes in the circumferential direction, the through holes correspond to the through holes arranged on the variable friction energy dissipation ring, and connecting pieces are arranged in the two through holes to realize connection among the base ring, the variable friction energy dissipation ring and the wind power tower; the adapter is fixed on the lower surface of the steel bearing platform in a rectangular frame shape; the stiffening ribs are triangular fixing plates, are uniformly distributed along the circumferential direction of the foundation ring and are perpendicular to the steel bearing platform.
According to an exemplary embodiment of an aspect of the present invention, the rocking mechanism may include an outer rocking member uniformly arranged under the steel deck outside the adapter, and an inner rocking member arranged under the steel deck inside the adapter and spaced apart from the outer rocking member by a predetermined distance.
Further, the outer side swinging member and the inner side swinging member can comprise steel piles and swinging connecting pieces, and the swinging connecting pieces are arranged at two ends of the steel piles; the swinging connecting piece can comprise a round steel backing plate, a round table-shaped connecting area and a round steel backing plate which are arranged outwards along the axis of the steel pile in sequence.
According to an exemplary embodiment of one aspect of the present invention, the limit mechanism may be disposed at an upper end of the foundation pit, and the limit mechanism may include a limiter and a connector, where the limiter is disposed around the steel bearing platform and fixedly connected to a side wall of the foundation pit, and a filling material having a buffering effect is disposed between the limiter and the steel bearing platform; the connector is arranged on the outer side of the steel bearing platform to connect the limiters into a whole.
Further, the foundation pit can be in an inverted trapezoid shape as a whole, the bottom is a floor, and the side edges are side slopes; the floor may be a waterproof floor; the side slope can be reinforced by adopting a support, and a waterproof material can be attached to the surface of the side slope.
According to an exemplary embodiment of an aspect of the present invention, the self-resetting energy consuming brace mechanism may include a self-resetting energy consuming horizontal brace and a self-resetting energy consuming diagonal brace, the self-resetting energy consuming horizontal brace being horizontally connected between the adapter and the side wall of the foundation pit, the self-resetting energy consuming diagonal brace being disposed between the bottom of the adjacent outer side sway member and the top of the inner side sway member.
According to an exemplary embodiment of an aspect of the present invention, the self-resetting energy-consuming horizontal brace and the self-resetting energy-consuming diagonal brace may each include a cylindrical support bar, a self-resetting energy-consuming device, and a double-row groove-shaped bolt plate, wherein the self-resetting energy-consuming device is disposed at a middle section of the rod body of the self-resetting energy-consuming horizontal brace and the self-resetting energy-consuming diagonal brace; the cylindrical support rods are positioned at two ends of the rod body; the double-row groove-shaped bolt plate is arranged at the free end of the cylindrical supporting rod, and is provided with bolt holes.
According to an exemplary embodiment of an aspect of the present invention, the lashing wire may include a prestressed steel strand, a cylindrical anchoring block, and a cubic anchoring block, wherein a lower end of the prestressed steel strand passes through a steel cap, and an upper end thereof is positioned at a top of the wind power tower; the cube anchoring block is arranged below the steel bearing platform and is used for anchoring the prestress steel strand with the steel foundation; the cylindrical anchoring block is arranged at the upper end of the prestress steel strand and anchors the prestress steel strand to the top of the wind power tower.
According to an exemplary embodiment of an aspect of the present invention, hinge supports may be provided on the inner side wall of the foundation pit, the outer side of the adapter, the bottom of the outer side swing member, and the top of the inner side swing member, and bolts may be provided in the bolt holes, and the rotational connection of the self-resetting energy consuming horizontal support and the self-resetting energy consuming diagonal support may be achieved through the hinge supports and the bolts.
In another aspect, the invention provides a wind power tower, which can comprise a wind power tower body and the wind power foundation with the self-resetting energy consumption function.
In a further aspect, the invention provides the application of the wind power foundation with the self-resetting energy consumption function in energy consumption shock absorption.
Compared with the prior art, the invention has the beneficial effects that at least one of the following contents is included:
(1) According to the connector provided by the invention, the limiters are connected into a whole, so that the displacement of the steel bearing platform can be limited, the maximum shearing force and the maximum overturning moment at the bottom of the wind power tower structure can be limited by the connector, the high-order effect can be effectively reduced, and the shock resistance can be improved;
(2) The wind power foundation provided by the invention can limit the maximum shearing force and the overturning moment at the bottom of the tower barrel, and effectively lighten the high-order effect of the integral structure;
(3) The wind power foundation provided by the invention is simple to assemble and easy to repair after earthquake, can improve the integrity and stability of the tower, and has good self-resetting function and energy consumption capability.
Drawings
The foregoing and other objects and features of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates a schematic view of the location of a wind power foundation of the present invention at a wind farm;
FIG. 2 shows a split structural schematic of a wind power foundation of the present invention;
FIG. 3 shows a front perspective view of a wind power foundation of the present invention;
FIG. 4 shows a schematic view of the split structure of the steel foundation of the present invention;
FIG. 5 shows a partial cross-sectional view of the steel foundation and stopper of the present invention taken along the direction A-A in FIG. 1;
FIG. 6 shows an isometric view of a wind power foundation of the present invention;
FIG. 7 shows a schematic bottom structural view of a wind power foundation of the present invention;
FIG. 8 shows a schematic view of a partial structure of a foundation pit of the present invention;
FIG. 9 shows a schematic view of the swing member of the present invention in a disassembled configuration;
fig. 10 shows a schematic structural view of the self-resetting energy-consuming brace mechanism rod of the present invention.
Reference numerals:
1-steel foundation, 101-steel bearing platform, 102-foundation ring, 103-friction-changing energy dissipation ring, 104-adapter, 105-stiffening rib, 106-bolt and 107-nut;
2-swinging mechanism, 201-outside swinging member, 202-inside swinging member, 203-steel pile, 204-swinging connector, 2041-round steel backing plate, 2042-round table shape connecting area;
3-limit mechanism, 301-limiter, 302-connector, 303-filling material;
the device comprises a 4-self-resetting energy consumption supporting mechanism, a 401-self-resetting energy consumption horizontal support, a 402-self-resetting energy consumption diagonal brace, a 403-cylindrical supporting rod, a 404-self-resetting energy consumption device and a 405-double-row groove-shaped bolt plate;
5-lashing, 501-prestress steel strands, 502-cylinder anchoring blocks and 503-cube anchoring blocks; 6-hinging support; 7-site; 8-a wind power tower; 9-foundation pit; 901-side slope; 902-floor.
Detailed Description
Hereinafter, a wind power foundation, a wind power tower and an application with a self-resetting energy consuming function of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
It should be noted that the terms "first," "second," "third," "fourth," and the like are merely for convenience of description and convenience of distinction and are not to be construed as indicating or implying relative importance. "upper," "lower," "inner," "outer," "middle," "top," "bottom," etc. are merely for convenience of description and to make up relative orientations or positional relationships, and do not indicate or imply that the components referred to must have that particular orientation or position.
First exemplary embodiment
FIG. 1 illustrates a schematic view of the location of a wind power foundation of the present invention at a wind farm; FIG. 2 shows a split structural schematic of a wind power foundation of the present invention; FIG. 3 shows a front perspective view of a wind power foundation of the present invention; FIG. 4 shows a schematic view of the split structure of the steel foundation of the present invention; FIG. 5 shows a partial cross-sectional view of the steel foundation and stopper of the present invention taken along the direction A-A in FIG. 1; FIG. 6 shows an isometric view of a wind power foundation of the present invention; FIG. 7 shows a schematic bottom structural view of a wind power foundation of the present invention; FIG. 8 shows a schematic view of a partial structure of a foundation pit of the present invention; FIG. 9 shows a schematic view of the swing member of the present invention in a disassembled configuration; fig. 10 shows a schematic structural view of the self-resetting energy-consuming brace mechanism rod of the present invention.
The embodiment provides a wind power foundation with a self-resetting energy consumption function.
As shown in fig. 1, a wind power foundation is provided on a site 7 for stabilizing a wind power tower 8, a part of which is located above the site surface and a part of which is located below the site surface. A foundation pit is arranged in the site, the foundation pit is positioned below the surface of the site, and the wind power foundation part structure can be positioned in the foundation pit 9 shown in fig. 2.
As shown in fig. 2, the wind power foundation mainly comprises a steel foundation 1, a swinging mechanism 2, a self-resetting energy-consuming supporting mechanism 4, a limiting mechanism 3 and a rope penetrating 5.
The steel foundation is mainly configured to fix the wind power tower. The swinging mechanism is arranged between the steel foundation and the bottom of the foundation pit and is used for vertically bearing the foundation and transmitting upper load to the foundation, and meanwhile, the swinging mechanism has the capability of improving the horizontal shearing resistance and self-resetting energy consumption of the integral structure. The swinging mechanism is rotatably connected with the steel foundation and the swinging mechanism is rotatably connected with the bottom of the foundation pit. The self-resetting energy consumption supporting mechanism is arranged between the components of the swinging mechanism and between the lower surface of the steel foundation and the side wall of the foundation pit, and can effectively limit the maximum shearing force and the maximum overturning moment of the bottom of the wind power tower structure. The foundation pit of the field can provide installation space for the swinging mechanism and the self-resetting energy consumption supporting mechanism. The whole rope is in a long rope shape, extends to the bottom of the steel foundation from the top of the wind power tower, is fixedly connected to the bottom of the steel foundation at the lower end, and is fixedly connected to the top of the wind power tower at the upper end.
In the present exemplary embodiment, as shown in fig. 4, the steel foundation may include a steel cap 101, a foundation ring 102, a variable friction energy dissipation ring 103, an adapter 104, and a stiffener 105. As shown in fig. 3, the steel deck 101 is a rectangular deck provided on the floor, part of which is located in the foundation pit. As shown in fig. 6, a base ring 102 and a variable friction dissipative ring 103 are both provided on the upper surface of the steel table 101. The variable friction energy dissipation ring 103 is positioned inside the foundation ring 102 and is used for fixing the bottom of the wind power tower. As shown in fig. 5, the inner surface of the base ring 102 has a wave shape, and the outer surface of the friction-changing energy-consuming ring 103 has a wave shape and is fitted with the wave shape of the inner surface of the base ring 102. As shown in fig. 4, through holes are formed in the circumferential direction of the base ring 102, and through holes are also formed in the friction-variable energy dissipation ring 103, the through holes of the two corresponding to each other. The through holes can be provided with connecting pieces to realize connection among the foundation ring, the friction-variable energy consumption ring and the wind power tower, so that the stability of the tower and the energy consumption capability of the structure in vertical movement are enhanced. Here, the connection members may be bolts 106 and nuts 107 in fig. 4. As shown in fig. 6, bolts 106 pass through holes in the base ring 102 and the variable friction energy dissipation ring 103, and cooperate with nuts 107 provided in the variable friction energy dissipation ring 103 to achieve a fixed connection between the base ring, the variable friction energy dissipation ring, and the wind turbine tower. As shown in fig. 7, the adapter 104 is rectangular frame-shaped and fixed to the lower surface of the steel table 101. As shown in fig. 6, the stiffening ribs 105 are triangular fixing plates, are disposed outside the foundation ring 102, are uniformly distributed along the circumferential direction of the foundation ring 102, and are disposed perpendicularly to the steel bearing platform 101. Here, as shown in fig. 6, 4 stiffening ribs 105 may be provided, each located in the circumferential direction of the steel cap 101.
Further, the foundation ring can be a steel cylinder, and the circular ring surface at the bottom of the foundation ring is concentrically fixedly connected to the upper surface of the steel bearing platform. The adapter may be a rectangular steel frame with a rectangular face concentric with the steel deck face. The stiffening rib can be a vertical triangle steel plate, one right-angle side is contacted with the outer surface of the foundation ring and is vertical to the upper surface of the steel bearing platform, and the other right-angle side is contacted with the steel bearing platform and is vertical to the midpoint of the rectangular side of the steel bearing platform.
Still further, the through holes formed at equal angles on the foundation ring can be oblong holes, and the friction-variable energy dissipation ring is provided with equidistant round holes, and the positions of the round holes correspond to the positions of the oblong holes on the foundation ring. Meanwhile, corresponding round holes are formed in the bottom of the wind power tower barrel according to the angle positions of the round holes formed in the variable friction energy dissipation ring and the long round holes formed in the foundation ring, the bottom of the tower barrel, the foundation ring and the variable friction energy dissipation ring are fixedly connected through connecting pieces such as bolts, and relative displacement between the variable friction energy dissipation ring and the bottom of the wind power tower barrel is avoided. As shown in fig. 6, 4 oblong holes on the base ring 102 may be provided.
In the present exemplary embodiment, as shown in fig. 7, the rocking mechanism may include an outer rocking member 201 and an inner rocking member 202. The outer rocking members 201 are evenly arranged under the steel deck 101 outside the adapter 104. The inner rocking member 202 is disposed below the steel deck 101 inside the adapter 104, and the outer rocking member 201 is spaced a predetermined distance from the inner rocking member 202 to provide a self-resetting dissipative diagonal brace 402. As shown in fig. 7, the lateral rocking member 201 and the medial rocking member 202 may be provided 20 in total.
In the present exemplary embodiment, as shown in fig. 9, the structural configuration of the outer and inner swing members may be the same, and each may include 1 steel pile 203 and 2 swing links 204. The 2 swing connectors 204 are provided at both ends of the steel pile 203, respectively. The wobble connection 204 may comprise a circular steel shim plate 2041, a frustoconical connection zone 2042 and another circular steel shim plate 2041 arranged in that order outwardly along the axis of the steel pile 203.
Further, the steel pile may be a steel cylinder. The top and the bottom of the truncated cone-shaped connecting area are respectively connected in the same shape.
In this exemplary embodiment, a limit mechanism may be provided at the upper end of the foundation pit, and the limit mechanism may include a limiter and a connector. As shown in fig. 6, the stoppers 301 are located around the steel deck 101 and are fixedly attached to the side walls of the foundation pit. The connectors 302 are arranged outside the steel deck 101 and between adjacent stoppers 301. The connectors 302 connect the limiters 301 as a whole to limit the displacement of the steel bearing platform 101, and can effectively buffer and limit the maximum horizontal displacement and speed of the steel bearing platform under the action of an earthquake.
Further, as shown in fig. 5 or 6, a filling material 303 may be disposed between the stopper 301 and the steel deck 101, and the filling material may be a light filling material having a buffering effect.
Still further, the stopper may be a rectangular steel plate, and has a function of a basement ceiling in addition to a function of restricting displacement of the steel table. The connector may be a rectangular steel plate. The long side of the limiter is the same as the steel bearing platform side in length and is fixed on one side of the foundation pit of the site, and the plate thickness center surface of the limiter is the same as the center surface of the steel bearing platform in level. The short sides of adjacent limiters around the steel bearing platform are connected into a whole through connectors. The lengths of the adjacent rectangular sides of the connector are equal to the lengths of the short sides of the limiters respectively.
In the present exemplary embodiment, the foundation pit (i.e., the spacing basement) also provides a larger space for facilitating post-earthquake maintenance and achieving the purpose of member replacement under the condition that the protection member is not affected by the natural environment. As shown in fig. 3, the foundation pit may include a side slope 901 and a floor 902. The whole of the limiting basement is in an inverted trapezoid shape, and after the soil at the bottom of the indoor is tamped and reinforced, a floor 902 is paved at the bottom of the limiting basement. The side of the limiting basement is a side slope 901, and the side slope 901 is the periphery of a foundation pit excavated in a field and has a certain gradient.
Further, the floor may be a waterproof floor. The side slope can be reinforced by adopting a support, and a waterproof material can be attached to the surface of the side slope.
In the present exemplary embodiment, as shown in fig. 7, the self-resetting energy consuming brace mechanism may include a self-resetting energy consuming horizontal brace 401 and a self-resetting energy consuming diagonal brace 402. As shown in fig. 3, self-resetting energy consuming horizontal brace 401 is horizontally connected between adapter 104 and side slope 901. As shown in fig. 7, a self-resetting dissipative diagonal brace 402 is disposed between adjacent outer side sway members 201 and inner side sway members 202. Specifically, as shown in fig. 3, a self-resetting energy consuming brace 402 is disposed between the bottom of adjacent outer side rocking member 201 and the top of inner side rocking member 202. As shown in fig. 7, the self-resetting energy consuming brace mechanism may include 8 self-resetting energy consuming horizontal braces 401 and 12 self-resetting energy consuming diagonal braces 402.
In the present exemplary embodiment, the structural configuration of the self-resetting power consuming horizontal support and the self-resetting power consuming diagonal support may be the same, and as shown in fig. 10, each of the self-resetting power consuming horizontal support and the self-resetting power consuming diagonal support may include a cylindrical support bar 403, a self-resetting power consuming device 404, and a double-row slot-shaped bolt plate 405. The self-resetting energy consumption device 404 is arranged at the middle section of the rod body of the self-resetting energy consumption horizontal support and the self-resetting energy consumption diagonal support. Cylindrical support rods 403 are located at both ends of the rod body. A double row slotted bolt plate 405 is provided at the free end of the cylindrical support bar 403, i.e. the end of the cylindrical support bar 403 facing away from the self-resetting energy consuming device 404. The double row slot bolt plate 405 is provided with bolt holes.
In the present exemplary embodiment, the lashing may include prestressed steel strands 501 and cylindrical anchor blocks 502 as shown in fig. 3, and cubic anchor blocks 503 as shown in fig. 5. As shown in fig. 5, the lower ends of the pre-stressed steel strands 501 pass through the steel cap 101. The upper end of the prestress steel strand is positioned at the top of the wind power tower. As shown in fig. 5, a cubic anchor block 503 is provided below the steel cap 101 to anchor the prestressed steel strands 501 with the steel cap 101. As shown in fig. 3, a cylindrical anchoring block 502 is provided at the upper end of the prestressed steel strand 501 to anchor the prestressed steel strand 501 to the top of the wind power tower to improve the integrity of the tower and the stability of the connection of the structure to the foundation.
In the present exemplary embodiment, as shown in fig. 8, hinge supports 6 may be provided on the side slope 901, the outside of the adapter 104, the bottom of the outside swing member 201, and the top of the inside swing member. The outer side of the adapter 104 is positioned on the same horizontal plane as the hinge support 6 of the side slope 901. Bolts can be arranged in the bolt holes of the self-resetting energy consumption horizontal support and the self-resetting energy consumption diagonal support, and the self-resetting energy consumption horizontal support is rotationally connected with the side slope and the adapter through the hinged support and the bolts, so that the horizontal shearing resistance and the self-resetting energy consumption capacity of the steel bearing platform are improved, and the high-order effect of the wind power tower is effectively reduced. The self-resetting energy-consumption diagonal bracing is connected with the bottom of the outer side swinging member and the top of the inner side swinging member in a rotating manner through the hinged support and the bolts, so that the overall stability, the vertical bearing capacity and the self-resetting energy consumption capacity of the swinging mechanism at the bottom of the steel bearing platform are improved, and the residual deformation of the bottom of the foundation is reduced.
Second exemplary embodiment
The embodiment provides an assembled wind power foundation with a self-resetting energy consumption function. The assembled wind power foundation can comprise an assembled steel foundation, a swinging mechanism, a self-resetting energy-consumption supporting system, a limiting basement and a rope penetrating device.
The assembled steel foundation comprises a steel bearing platform, a foundation ring, a friction-variable energy dissipation ring, an adapter and stiffening ribs. The steel bearing platform is a rectangular platform, the foundation ring is a steel cylinder, the inside of the cylinder is a wave-shaped vase-shaped cavity which is penetrated up and down, a slotted hole is formed in the circumferential direction of the foundation ring at equal angles, the circular ring surface at the bottom of the foundation ring is concentrically fixedly connected to the rectangular upper surface of the steel bearing platform, the outer surface of the friction-changing energy-consumption ring is in a wave-shaped vase shape, and the inside of the friction-changing energy-consumption ring is a cavity which is penetrated up and down. The outer surface of the friction-variable energy dissipation ring is identical and matched with the wave-shaped vase-shaped cavity in the foundation ring, and the inner surface of the friction-variable energy dissipation ring is matched with the outer surface of the bottom of the wind power tower. The friction-variable energy dissipation rings are equidistantly provided with round holes, and are fixed between the tower barrel and the foundation ring by arranging bolts in the holes. Round holes are formed in the bottom of the applicable wind power tower barrel according to the equal angles of round holes formed in the variable friction energy dissipation ring and long round holes formed in the foundation ring, the bottom of the tower barrel, the foundation ring and the variable friction energy dissipation ring are connected through bolts and nuts, and the stability of the tower barrel and the energy dissipation capacity of the structure in vertical movement are enhanced. The adapter is a rectangular steel frame and is fixed on the lower surface of the steel bearing platform, the rectangular surface is concentric with the surface of the steel bearing platform, the reinforcement function is achieved on the bottom of the foundation, and meanwhile the adapter has the function of connecting and transferring the self-resetting energy consumption horizontal support. The stiffening rib is a vertical triangle steel plate, one right-angle side is contacted with the outer surface of the foundation ring and is perpendicular to the upper surface of the steel bearing platform, and the other right-angle side is contacted with the steel bearing platform and is perpendicular to the middle point of the rectangular side of the steel bearing platform.
The swinging mechanism comprises an outer swinging member and an inner swinging member, and the swinging members of the swinging mechanism are respectively fixed on the bottom surface of the steel bearing platform and the bottom of the foundation pit through swinging connection at two ends and are used for vertically transmitting upper load to the foundation and mainly playing a role in transmitting load. And meanwhile, the device also has the capability of improving the horizontal shearing force resistance and self-resetting energy consumption of the structure. The outboard and inboard sway members each comprise a sway connection and a steel pile. The swinging connection comprises a truncated cone-shaped connection area and two round steel backing plates, the top and the bottom of the truncated cone-shaped connection area are respectively connected in the same shape, the steel piles are steel cylinders, and the two ends of the steel piles are respectively and swinging connected with the bottom fixedly connected.
The self-resetting energy consumption supporting system comprises a self-resetting energy consumption horizontal support and a self-resetting energy consumption diagonal support, wherein the whole support is a cylindrical rod, a self-resetting energy consumption device is arranged at the middle section of the rod, and two ends of the rod are provided with cylindrical support rods and two rows of groove-shaped bolt plates and are provided with bolt holes.
The limiting basement comprises a limiter, connectors, filling materials, side slopes and floors. Under the condition that the limiting basement protects the components from the influence of natural environment, a larger space is provided, so that the maintenance after earthquake is convenient, and the aim of replacing the components can be fulfilled. The limiter is a rectangular steel plate, the long side of the limiter is the same with the side of the steel bearing platform in length and is fixed on one side of a foundation pit of a field, the center surface of the plate thickness is the same with the center surface of the steel bearing platform in level, one section close to the bearing platform is a free end, and a small gap is formed between the limiter and the steel bearing platform and is used for arranging filling materials. The connector is rectangular steel plate, and the lengths of adjacent rectangular sides of the connector are equal to the lengths of short sides of the limiters respectively. The short sides of the adjacent limiters are connected into a whole through the connector, and the maximum horizontal displacement of the foundation bearing platform can be effectively buffered and limited under the earthquake action. The side slope is a foundation pit periphery of a field excavation, has a certain gradient, is reinforced by adopting a support, and is attached with a waterproof material on the surface. The floor is the foundation pit bottom, and the soil compaction of bottom consolidates to paste waterproof floor.
The reeving comprises a prestress steel strand, a cylindrical anchoring block and a cubic anchoring block. The lower ends of the prestressed steel strands penetrate through the centers of the upper surface and the lower surface of the steel bearing platform, the lower ends of the steel strands are anchored with the assembled steel foundation through the cube anchoring blocks, and the steel strands are anchored with the top of the tower through the cylinder anchoring blocks.
In the embodiment, the outer side surface of the adapter and the side slope of the foundation pit can be respectively provided with hinge supports, the hinge supports on two sides are positioned on the same horizontal plane, and the two ends of the self-resetting energy consumption horizontal support are fixed through bolts, so that the horizontal shearing resistance and the self-resetting energy consumption capacity of the steel foundation bearing platform are improved, and the high-order effect of the wind power tower is effectively reduced. The bottom of the outer side swinging member and the top of the inner side swinging member can be respectively provided with a hinged support, and the two ends of the self-resetting energy-consumption diagonal bracing are fixed through bolts, so that the overall stability, the vertical bearing capacity and the self-resetting energy consumption capacity of the bearing platform bottom swinging mechanism are improved, and the residual deformation of the bottom of the foundation is reduced.
Third exemplary embodiment
The present exemplary embodiment provides a wind power tower, which may include a wind power tower body, and the wind power foundation having the self-resetting energy consumption function as described in the first exemplary embodiment or the second exemplary embodiment.
Fourth exemplary embodiment
The present exemplary embodiment provides an application of the wind power foundation with the self-resetting energy consumption function in energy consumption shock absorption according to the first exemplary embodiment or the second exemplary embodiment.
The wind power foundation with the self-resetting energy consumption function can be arranged at the bottom of a wind power tower barrel and is arranged in a site foundation pit. Under the action of an earthquake, the wind power tower can generate larger shearing and overturning moment on the base, so that the foundation is greatly damaged, the wind power foundation can limit the maximum shearing force and overturning moment requirement of the wind power tower structure through the structure of the wind power foundation, the high-mode effect above the foundation is lightened, and the earthquake energy consumption and self-resetting requirement are met.
In summary, the advantages of the present invention include at least one of the following:
(1) According to the invention, the swinging mechanism is arranged at the bottom of the wind power foundation, so that partial horizontal resistance and self-resetting capability can be provided, the swinging members at the outermost side are connected with the swinging members at the inner side through the self-resetting energy-consumption diagonal bracing, the stability and the integrity of the bottom swinging mechanism are improved, the self-resetting capability of the wind power foundation is enhanced, the damage of the swinging members is avoided, and the residual deformation of the bottom of the foundation is reduced;
(2) According to the wind power foundation structure, the friction-variable energy consumption components are arranged in the foundation ring, so that the energy consumption capability of the wind power foundation structure in vertical movement can be effectively enhanced;
(3) According to the invention, through the limiter and the self-resetting energy consumption support in the horizontal direction, the maximum shearing force and the maximum overturning moment at the bottom of the wind power tower structure are limited, the high-order effect above the foundation can be effectively lightened, the stronger self-resetting energy consumption capability is provided, and the shock resistance of the whole structure is effectively improved;
(4) The assembled steel foundation adopted by the invention can strengthen the consolidation of the bottom of the wind power tower barrel and the foundation, ensure convenient construction and reduce the repair work and cost of the foundation damage after earthquake;
(5) The prestress steel cable provided by the invention enhances the integrity of the whole wind power tower barrel structure, and simultaneously improves the stability of the structure and the connection of the foundation and the stability of the wind power structure;
(6) The wind power tower barrel has good stability and is not easily damaged by structures caused by earthquakes and the like;
(7) The application of the wind power foundation in energy consumption and vibration reduction can be used for carrying out energy consumption and vibration reduction on the wind power tower in vibration, and the restorability is effectively improved.
Although the wind power foundation, the wind power tower and the application of the present invention having the self-resetting energy consuming function have been described above by way of the exemplary embodiments, it should be apparent to those skilled in the art that various modifications and changes can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A wind power foundation with self-resetting energy consumption function is characterized by comprising a steel foundation, a swinging mechanism, a self-resetting energy consumption supporting mechanism, a limiting mechanism and a rope penetrating device, wherein,
the steel foundation is arranged on the field and is configured to fix the wind power tower;
the swinging mechanism is rotationally connected between the steel foundation and the bottom of the foundation pit;
the self-resetting energy consumption supporting mechanism is rotatably arranged between the swinging mechanisms and between the steel foundation and the inner side wall of the foundation pit;
the limiting mechanism is arranged in the foundation pit and is configured to limit the displacement of the steel foundation;
the whole rope is in a long rope shape, the lower end of the rope is fixedly connected to the bottom of the steel foundation, and the upper end of the rope is fixedly connected to the top of the wind power tower.
2. The wind power foundation with self-resetting energy consumption function as defined in claim 1, wherein the steel foundation comprises a steel bearing platform, a foundation ring, a friction-varying energy consumption ring, an adapter and a stiffening rib, wherein,
the steel bearing platform is a rectangular platform and is arranged on the field, and part of the steel bearing platform is positioned in the foundation pit;
the foundation ring and the variable friction energy dissipation ring are both arranged on the steel bearing platform, and the variable friction energy dissipation ring is positioned in the foundation ring and is used for fixing the bottom of the wind power tower; the inner surface of the foundation ring is in a wave shape, and the outer surface of the friction-changing energy-consuming ring is in a wave shape and is matched with the wave shape of the inner surface of the foundation ring; the base ring is provided with through holes in the circumferential direction, the through holes correspond to the through holes arranged on the variable friction energy dissipation ring, and connecting pieces are arranged in the two through holes to realize connection among the base ring, the variable friction energy dissipation ring and the wind power tower;
the adapter is fixed on the lower surface of the steel bearing platform in a rectangular frame shape;
the stiffening ribs are triangular fixing plates, are uniformly distributed along the circumferential direction of the foundation ring and are perpendicular to the steel bearing platform.
3. The wind power foundation with self-resetting energy consumption function as recited in claim 2, wherein the rocking mechanism comprises an outer rocking member and an inner rocking member, the outer rocking member is uniformly arranged below the steel bearing platform outside the adapter, and the inner rocking member is arranged below the steel bearing platform inside the adapter and is spaced a predetermined distance from the outer rocking member.
4. The wind power foundation with self-resetting energy consumption function as recited in claim 3, wherein the limiting mechanism is arranged at the upper end of the foundation pit, the limiting mechanism comprises a limiter and a connector, wherein,
the limiter is arranged around the steel bearing platform and fixedly connected to the side wall of the foundation pit, and a filling material with a buffering effect is arranged between the limiter and the steel bearing platform;
the connector is arranged on the outer side of the steel bearing platform to connect the limiters into a whole.
5. The wind power foundation with self-resetting energy consumption function as recited in claim 4, wherein the self-resetting energy consumption supporting mechanism comprises a self-resetting energy consumption horizontal support and a self-resetting energy consumption diagonal support, the self-resetting energy consumption horizontal support is horizontally connected between the adapter and the side wall of the foundation pit, and the self-resetting energy consumption diagonal support is arranged between the bottom of the adjacent outer side swinging member and the top of the inner side swinging member.
6. The wind power foundation with self-resetting energy consumption function as recited in claim 5, wherein the self-resetting energy consumption horizontal support and the self-resetting energy consumption diagonal support each comprise a cylindrical support rod, a self-resetting energy consumption device and a double-row groove-shaped bolt plate, wherein,
the self-resetting energy consumption device is arranged at the middle section of the rod body of the self-resetting energy consumption horizontal support and the self-resetting energy consumption diagonal bracing;
the cylindrical support rods are positioned at two ends of the rod body;
the double-row groove-shaped bolt plate is arranged at the free end of the cylindrical supporting rod, and is provided with bolt holes.
7. The wind power foundation with self-resetting energy consumption function as defined in claim 2, wherein the reeving comprises prestressed steel strands, cylindrical anchoring blocks and cubic anchoring blocks, wherein,
the lower end of the prestress steel strand penetrates through the steel bearing platform, and the upper end of the prestress steel strand is positioned at the top of the wind power tower;
the cube anchoring block is arranged below the steel bearing platform and is used for anchoring the prestress steel strand with the steel foundation;
the cylindrical anchoring block is arranged at the upper end of the prestress steel strand and anchors the prestress steel strand to the top of the wind power tower.
8. The wind power foundation with self-resetting energy consumption function as set forth in claim 6, wherein hinge supports are provided on the inner side wall of the foundation pit, the outer side of the adapter, the bottom of the outer side swing member and the top of the inner side swing member, bolts are provided in the bolt holes, and the rotational connection of the self-resetting energy consumption horizontal support and the self-resetting energy consumption diagonal support is realized by the hinge supports and the bolts.
9. A wind power tower, characterized in that it comprises a wind power tower body and a wind power foundation according to any one of claims 1-8.
10. Use of a wind power foundation according to any of claims 1-8 for energy consumption and shock absorption.
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| CN117167201A (en) * | 2023-09-06 | 2023-12-05 | 重庆大学 | Hybrid wind power tower system and self-resetting energy dissipation supporting device |
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