Steel-concrete connection structure of floating wind turbine foundation and floating wind turbine foundation

Abstract

The present disclosure provides a steel-concrete connection structure of a floating wind turbine foundation and a floating wind turbine foundation for connecting between a concrete structure and a steel structure, the steel-concrete connection structure comprising a bearing plate, a concrete structure section and a steel structure section, the concrete structure section being used for connecting the concrete structure and being arranged on a first side of the bearing plate, the concrete structure section comprising a plurality of prestressed tendons extending from the bearing plate to the first side of the bearing plate, a plurality of the prestressed tendons being poured with concrete, and a plurality of the prestressed tendons being fixed to the bearing plate; the steel structure section being fixed to a second side of the bearing plate and being used for connecting the steel structure. By arranging the steel-concrete connection structure between the concrete structure and the steel structure, the force can be effectively transmitted between the steel structure and the concrete structure when bearing loads such as axial force, bending moment, shear force and torque, and the carrying capacity and stability of the entire steel-concrete connection structure are improved.

Description

Technical Field

[0001] This disclosure pertains to the field of wind power generation technology, and particularly relates to a steel-concrete connection structure for a floating wind turbine foundation and a floating wind turbine foundation. Background Technology

[0002] With the continued growth of global demand for clean energy, wind power technology has attracted much attention. Offshore wind power is becoming increasingly popular in order to fully utilize offshore resources. Floating wind turbine foundations, as an important component of floating wind turbine units, have also garnered significant attention. Utility Model Content

[0003] The main objective of this disclosure is to provide a steel-concrete connection structure for a floating wind turbine foundation and a floating wind turbine foundation, thereby improving the load-bearing capacity of the floating wind turbine foundation.

[0004] To achieve the above objectives, this disclosure provides the following technical solution: According to one aspect of this disclosure, a steel-concrete connection structure for a floating wind turbine foundation is provided for connecting a concrete structure and a steel structure. The steel-concrete connection structure includes a bearing plate, a concrete structure segment, and a steel structure segment. The concrete structure segment is used to connect the concrete structure and is disposed on a first side of the bearing plate. The concrete structure segment includes a plurality of prestressed tendons fixed to the first side of the bearing plate and extending away from the bearing plate, with concrete poured between the plurality of prestressed tendons. The steel structure segment is fixed to a second side of the bearing plate for connecting with the steel structure.

[0005] According to an exemplary embodiment of this disclosure, the steel structure segment is cylindrical, and the outer periphery of the pressure plate is fixed to the inner wall of the steel structure segment.

[0006] According to an exemplary embodiment of this disclosure, the pressure plate includes a grid structure having at least two cell chambers, with the prestressing tendons arranged on the edge of each cell chamber.

[0007] According to an exemplary embodiment of the present disclosure, the concrete structural segment further includes a plurality of structural reinforcing bars, which are embedded in the concrete structural segment and arranged at an angle to the prestressing tendons.

[0008] According to an exemplary embodiment of this disclosure, the concrete structural segment has an internal cavity, the structural reinforcing bars are arranged perpendicular to the prestressing tendons, the steel-concrete connection structure further includes a reinforcing steel cylinder, the reinforcing steel cylinder is connected to the pressure plate and extends away from the pressure plate, the reinforcing steel cylinder is sleeved on at least a portion of the outer periphery of the concrete structural segment, and the structural reinforcing bars are arranged perpendicular to the cavity wall at their location and connected to the reinforcing steel cylinder.

[0009] According to an exemplary embodiment of this disclosure, the reinforced steel cylinder and the steel structure segment are integrally formed.

[0010] According to an exemplary embodiment of the present disclosure, the steel-concrete connection structure further includes a stiffening rib, one side of which is fixed to the inner wall surface of the steel structure segment, and the other side extends toward the inner cavity of the steel structure segment. One end of the stiffening rib is fixed to the second side of the pressure plate, and the other end extends away from the pressure plate.

[0011] According to an exemplary embodiment of this disclosure, the steel-concrete connection structure is provided with a plurality of stiffening ribs, which are uniformly arranged along the circumference of the steel structure segment.

[0012] According to another aspect of this disclosure, a floating wind turbine foundation is provided, comprising a concrete structure, a steel structure, and a steel-concrete connection structure as described above connecting the concrete structure and the steel structure.

[0013] According to an exemplary embodiment of this disclosure, the steel structure segment and the steel structure are integrally formed, and / or the concrete structure and the concrete structure segment are integrally cast.

[0014] According to an exemplary embodiment of the present disclosure, the concrete structure includes side columns and multiple pontoons. Each pontoon has a first internal cavity, and each side column has a second internal cavity. The multiple pontoons are connected end to end to form a polygonal ring structure, and the side columns are disposed at the connection between two adjacent pontoons.

[0015] According to an exemplary embodiment of this disclosure, the steel structure includes a plurality of bottom supports, the bottom supports having a shell structure, one end of the plurality of bottom supports converging together, and the other end being connected to the corresponding pontoon.

[0016] According to an exemplary embodiment of this disclosure, the steel structure further includes a central column and a connecting support member. The central column is disposed at the intersection of the plurality of bottom supports and extends upward from the bottom supports. The connecting support member is connected between the central column and the side columns.

[0017] The steel-concrete connection structure and floating wind turbine foundation provided in this disclosure have at least the following beneficial effects: The steel-concrete connection structure provided in this disclosure is set between the concrete structure and the steel structure. When subjected to loads such as axial force, bending moment, shear force and torque, it can effectively transfer the force between the steel structure and the concrete structure, thereby improving the load-bearing capacity and stability of the entire steel-concrete connection structure. Attached Figure Description

[0018] The above and / or other objects and advantages of this disclosure will become clearer from the following description of embodiments taken in conjunction with the accompanying drawings, in which: Figure 1A structural diagram of a floating wind turbine foundation provided for an exemplary embodiment of this disclosure.

[0019] Figure 2 for Figure 1 The structural diagram of the steel-concrete connection structure in the text.

[0020] Figure 3 for Figure 2 A perspective view of the steel-concrete composite structure.

[0021] Figure 4 for Figure 3 The front view of the steel-concrete connection structure.

[0022] Figure 5 for Figure 3 A side view of the steel-concrete joint structure.

[0023] Figure 6 for Figure 3 A top view of the steel-concrete composite structure.

[0024] Figure 7 for Figure 2 Longitudinal section of the steel-concrete joint structure.

[0025] Explanation of reference numerals in the attached figures: 1. Top slab; 2. Bottom slab; 3. Side panels; 4. Structural reinforcing ribs; 5. Pressure plate; 6. Anchorage; 7. Prestressed tendons; 8. Stiffening ribs; 9. Base support; 10. Floating box; 11. Steel-concrete composite structure; 12. Side columns; 13. Connecting support components; 14. Central column; 103. Steel structure section; 104. Concrete structure section; 105. Reinforced steel cylinder. Detailed Implementation

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be construed that the embodiments of this disclosure are limited to those described herein. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0027] With the continued growth in global demand for clean energy, offshore wind power, as a clean, sustainable, and high-energy-density energy form, is gradually becoming a key area of ​​research and development in the energy sector.

[0028] However, nearshore resources are gradually becoming saturated, making the development of deep-sea wind power an inevitable trend. Floating wind turbines, as a key technology adapted to the deep-sea environment, offer significant advantages. They are not limited by water depth or seabed conditions, allowing for better utilization of abundant offshore wind energy resources. Furthermore, their flexible installation locations effectively reduce noise and electromagnetic interference to the surrounding environment. Therefore, floating wind turbine foundations, as a crucial component of floating wind turbines, have attracted considerable attention.

[0029] Reference Figure 1 According to an exemplary embodiment of the present disclosure, a floating wind turbine foundation is provided that can adapt to the marine environment, for example, but not limited to, the floating wind turbine foundation can adapt to the development of deep-sea wind power, but is not limited thereto.

[0030] In existing technologies, most floating wind turbine foundations are made of steel. Due to the large size of floating wind turbine foundations, the amount of steel used is huge, resulting in high manufacturing costs.

[0031] According to one aspect of this disclosure, a floating wind turbine foundation is provided, comprising a concrete structure, a steel structure, and a steel-concrete connection structure connecting the concrete structure and the steel structure. Since the raw materials (e.g., cement or aggregate) for concrete structures are relatively cheaper than steel, using a concrete structure to manufacture the floating wind turbine foundation can reduce the amount of steel used, thereby lowering the cost of the floating wind turbine foundation.

[0032] Furthermore, due to the high density of concrete structures, placing them at the bottom of the floating wind turbine foundation provides better ballast performance, helps lower the center of gravity of the entire wind turbine, and thus improves the stability of the wind turbine.

[0033] According to an exemplary embodiment of this disclosure, the concrete structure includes side columns 12 and pontoons 10, at least partially constructed of concrete. This effectively reduces the manufacturing cost of the floating wind turbine foundation, but is not a limitation thereof. Furthermore, compared to a steel structure of the same volume, the concrete structure is heavier, resulting in a lower center of gravity for the floating wind turbine foundation, thus making the foundation more stable.

[0034] In this embodiment, the floating wind turbine foundation includes multiple floating boxes 10 connected end to end to form a polygonal ring structure. For example, but not limited to, in this embodiment, the floating wind turbine foundation includes three floating boxes 10, which are connected end to end to form a triangular ring structure, thus having strong structural stability.

[0035] The side support column 12 can be connected to a polygonal ring structure formed by multiple pontoons 10, for example, but not limited to, the side support column 12 can be connected at the junction of two adjacent pontoons 10, but is not limited thereto. As an example, the side support column 12 can be formed as a floating column with an internal cavity, for example, but not limited to, the floating column can be cylindrical, but is not limited thereto.

[0036] In this embodiment, multiple pontoons 10 are connected end-to-end to form a polygonal ring structure, and the side columns 12 are connected at the junctions of adjacent pontoons 10. Both the pontoons 10 and the side columns 12 are made of concrete. Through the coordinated operation of the side columns 12 and the pontoons 10, the structural stability of the floating wind turbine foundation is improved. This embodiment uses three pontoons 10 with identical structures forming an equilateral triangular ring structure as an example for illustration, but it is not limited to this.

[0037] To improve the buoyancy of the concrete structure and reduce the material used in the floating wind turbine foundation, in this embodiment, the pontoon 10 and the side columns 12 may be provided with internal cavities, but this is not a limitation. As needed, weights can be added to the internal cavity of the pontoon 10 to increase the counterweight of the floating wind turbine foundation, but this is not a limitation either. For example, the weights inside the pontoon 10 can be seawater or fresh water, but this is not a limitation.

[0038] To further improve the structural stability of the floating wind turbine foundation, in this embodiment, the floating wind turbine foundation may also include a steel structure. To reduce the amount of steel used, in this embodiment, the steel structure is designed to have an internal cavity, but this is not a limitation.

[0039] As an example, the steel structure may include multiple base supports 9, which are arranged within a polygonal ring structure enclosed by multiple floating boxes 10. One end of the multiple base supports 9 intersects with each other, and the other end extends toward and connects to the corresponding floating box 10. In this way, the structural stability of the floating wind turbine foundation is improved by connecting the multiple base supports 9 to each other and to the floating box 10.

[0040] In this embodiment, the steel structure may include a bottom support 9 with the center of the equilateral triangular ring structure formed by three pontoons 10 as the intersection point and extending to each pontoon 10. One end of the bottom support 9 is joined together and the other end is connected to the pontoon 10, but this is not a limitation.

[0041] According to an exemplary embodiment of this disclosure, the extension direction of the bottom support 9 is perpendicular to the extension direction of the pontoon 10, but is not limited thereto.

[0042] Furthermore, the steel structure also includes a central column 14, which is connected to the intersection of multiple bottom supports 9 and extends upward. In order to further improve the structural stability of the floating wind turbine foundation, a connecting support 13 is connected between the central column 14 and the side columns 12, so that the central column 14, the side columns 12, the bottom supports 9 and the floating box 10 are reliably connected together, thereby improving the connection reliability of the floating wind turbine foundation, but not limited thereto.

[0043] In an optional embodiment, the central column 14 can be a hollow shell structure to reduce the amount of steel used, thereby reducing the cost of the floating wind turbine foundation. As an example, the central column 14 and the base support 9 can be an integral structure, but this is not a limitation; as needed, the central column 14 and the base support 9 can be formed separately and then connected together. To further reduce the amount of material used in the floating wind turbine foundation, the connecting support 13 can be a hollow steel pipe, but this is not a limitation.

[0044] To improve the service life of steel structures, anti-corrosion coatings or other anti-corrosion structures may be applied to the surface of the steel structure, but this is not a limitation.

[0045] Referring again to the attached drawings, the steel-concrete connection structure 11 is positioned between the concrete structure and the steel structure to enhance the structural strength of the floating wind turbine foundation. The floating wind turbine foundation provided in this disclosure effectively transfers forces between the steel and concrete structures when subjected to loads such as axial force, bending moment, shear force, and torque, thereby improving the overall load-bearing capacity and stability of the floating wind turbine foundation.

[0046] For ease of description, this embodiment uses the steel-concrete connection structure 11 between the pontoon 10 and the bottom support 9 as an example, but it is not limited thereto.

[0047] According to an exemplary embodiment of the present disclosure, the steel-concrete connection structure 11 may include a pressure plate 5, a concrete structure section 104 and a steel structure section 103. The concrete structure section 104 is disposed on the first side of the pressure plate 5 and is used to connect the concrete structure, for example, but not limited to, the concrete structure section 104 is used to connect with the pontoon 10, but is not limited thereto.

[0048] In this embodiment, the concrete structure segment 104 includes a plurality of prestressing tendons 7, which may be fixed to the bearing plate 5 and extend away from the bearing plate 5, but are not limited thereto. As an example, the bearing plate 5 is a metal component, for example, but not limited to, it may be made of high-strength steel. The prestressing tendons 7 may include anchor rods, the ends of which are fixed to the bearing plate 5 by anchorages 6, but are not limited thereto.

[0049] To improve the structural reliability of the floating wind turbine foundation, concrete is poured between multiple prestressed tendons 7, so that the concrete and multiple prestressed tendons 7 are reliably connected together to form a concrete structural segment 104, which is reliably connected to the bearing plate 5.

[0050] According to an exemplary embodiment of the present disclosure, a steel structure segment 103 is disposed on the second side of the pressure plate 5 for connection with the steel structure. For example, but not limited to, the pressure plate 5 and the steel structure segment 103 are connected together by fasteners or welding process, and the pressure plate 5 and the steel structure segment 103 are reliably connected together.

[0051] This disclosure uses a bearing plate 5 to be fixedly connected to the steel structure section 103 on one side and to the concrete structure section 104 on the other side, thereby ensuring a reliable connection between the concrete structure section 104 and the steel structure section 103 and improving the reliability of the steel-concrete connection structure 11.

[0052] In this embodiment, the bearing plate 5 transmits the axial force, bending moment, and other loads from the steel structure segment 103 evenly to the concrete structure through the concrete structure segment 104 in contact with the bearing plate 5, thereby effectively avoiding stress concentration. The prestressing tendons 7 connected to the bearing plate 5 provide reliable anchorage, allowing the prestressing force on the prestressing tendons 7 to be effectively applied to the entire steel-concrete connection structure 11 through the bearing plate 5. With this configuration, the bearing plate 5 not only bears the load transfer task but also evenly transmits the prestress to the entire steel-concrete connection structure 11, improving the structural stability and load-bearing capacity of the steel-concrete connection structure 11.

[0053] In this embodiment, the steel-concrete connection structure 11, the concrete structure, and the steel structure can be formed independently. At the site of assembling the floating wind turbine foundation, the steel-concrete connection structure 11 is then connected to the concrete structure and the steel structure, respectively, to achieve on-site assembly of the steel-concrete connection structure 11, the concrete structure, and the steel structure. Furthermore, if necessary, the steel structure segment 103 of the steel-concrete connection structure 11 and the steel structure can be integrally formed, so that there is no obvious physical boundary between the steel-concrete connection structure 11 and the concrete structure. Similarly, the concrete structure segment 104 of the steel-concrete connection structure 11 and the concrete structure can be integrally cast, so that there is no obvious physical boundary between the steel-concrete connection structure 11 and the steel structure. In this case, the boundary of the steel-concrete connection structure 11 is virtual, but not limited to this.

[0054] For ease of description, this embodiment uses the example of a steel-concrete connection structure 11 with no obvious physical separation boundary between the concrete structure and the steel structure as an example, but it is not limited to this.

[0055] Reference Figure 2According to an exemplary embodiment of the present disclosure, in order to reduce the material usage of the steel-concrete connection structure 11, the steel structure section 103 can be configured as a cylinder, and the outer periphery of the pressure plate 5 is connected to the end of the steel structure section 103, so that the pressure plate 5 is reliably fixed on the steel structure section 103, thereby improving the reliability of the steel-concrete connection structure 11.

[0056] As an example, the steel structure segment 103 may include a top plate 1 and a bottom plate 2 arranged at intervals and opposite to each other, and at least two side plates 3 connected between the top plate 1 and the bottom plate 2. The at least two side plates 3 may be arranged at intervals, forming a cylindrical shape by the top plate 1, the bottom plate 2, and the two side plates 3, but this is not a limitation. The top plate 1 can be used to bear part of the load from above, such as horizontal forces caused by wind and waves, and can transfer the load to the entire steel-concrete connection structure 11. Correspondingly, the bottom plate 2 mainly transfers the load from the structure above it to the entire steel-concrete connection structure 11 evenly, avoiding local stress concentration. When the steel-concrete connection structure 11 is subjected to horizontal shear forces caused by wind and waves, shear forces generated by structural torsion, etc., the two side plates 3 play a key role in resisting shear. This embodiment uses a steel structure segment 103 including three side plates 3 as an example to improve the structural strength of the steel structure segment 103, but this is not a limitation.

[0057] Furthermore, the extension direction of the prestressing tendon 7 is perpendicular to the bearing plate 5, but is not limited thereto.

[0058] To further enhance the structural strength of the steel-concrete connection structure 11, the bearing plate 5 includes a grid structure with at least two cell compartments, and prestressing tendons 7 are arranged on each edge of the cell compartment, but not limited thereto. This arrangement increases the number of cell compartments, thereby increasing the number of edges, and thus improving the structural strength of the bearing plate 5. Furthermore, by providing prestressing tendons 7 on each edge, i.e., by increasing the number of cell compartments, the number of prestressing tendons 7 is increased, thereby improving the structural strength of the concrete structure segment 104, and thus also improving the structural strength of the steel-concrete connection structure 11, but not limited thereto.

[0059] The bearing plate 5 in the steel-concrete connection structure 11 disclosed herein distributes the axial force, bending moment, and other loads from the bottom support 9 evenly to the concrete structure through its contact surface with the concrete structure, effectively avoiding stress concentration. On the other hand, the bearing plate 5 provides reliable anchorage for the prestressing tendons 7, enabling the prestressing tendons 7 to effectively apply prestress to the entire steel-concrete connection structure 11 through the bearing plate 5, thus enhancing the stability and load-bearing capacity of the steel-concrete connection structure 11.

[0060] For ease of description, this embodiment uses a bearing plate 5 with two cell chambers as an example, but it is not limited to this. The number of cell chambers can be three, four, or more as needed, but is not limited to this. The bearing plate 5 having two cell chambers ensures the overall rigidity of the bearing plate, avoids stress concentration, and achieves uniform force transfer at the steel-concrete interface.

[0061] Continue to refer to Figure 3 To further improve the structural strength of the concrete structural segment 104, the concrete structural segment 104 may also include multiple structural reinforcing bars 4, which are embedded in the concrete structural segment 104 and arranged at an angle to the prestressing tendons 7. As an example, the structural reinforcing bars 4 may be shear studs, but are not limited thereto; other forms of rigid structural segments are also within the scope of this disclosure.

[0062] In this embodiment, multiple structural stiffeners 4 can withstand shear force, prevent relative horizontal slippage between the steel structure and the concrete structure, enhance the connection strength between the steel structure and the concrete structure, and enable them to work together. When subjected to loads such as axial force, bending moment, shear force, and torque, they can effectively transfer force between the steel structure and the concrete structure, improving the load-bearing capacity and stability of the entire steel-concrete connection structure 11.

[0063] Continue to refer to Figure 3 and Figure 4 In this embodiment, the alternating arrangement of prestressing tendons 7 and structural reinforcing ribs 4 improves the load-bearing capacity of the concrete structural segment 104 in different directions, thereby enabling the concrete structural segment 104 to adapt to the variable stress conditions at sea, but this is not a limitation. As an example, the structural reinforcing ribs 4 are arranged perpendicular to the prestressing tendons 7, and the structural reinforcing ribs 4 are set perpendicular to the cavity wall at their location, such as... Figure 4 As shown, but not limited to.

[0064] Reference Figures 5 to 7 To further improve the structural strength of the steel-concrete connection structure 11, the steel-concrete connection structure 11 may also include a reinforcing steel cylinder 105, which is connected to the bearing plate 5 and extends away from the bearing plate 5. The reinforcing steel cylinder 105 is wrapped around at least a portion of the outer periphery of the concrete structure section 104, wherein the structural reinforcing ribs 4 are connected to the reinforcing steel cylinder 105.

[0065] In this embodiment, by wrapping at least a portion of the concrete structure segment 104 with a reinforced steel cylinder 105, the structural strength of the concrete structure segment 104 is improved, thereby increasing the structural strength of the steel-concrete connection structure 11. The prestressing tendons 7 are connected to the bearing plate 5, the reinforced steel cylinder 105 is connected to the bearing plate 5, and the structural reinforcing ribs 4 are connected to the reinforced steel cylinder 105. This allows the prestressing tendons 7, the bearing plate 5, the structural reinforcing ribs 4, and the reinforced steel cylinder 105 to be connected together, effectively transferring and rationally distributing complex loads such as axial force, bending moment, shear force, and torque, thus improving the overall bearing capacity of the concrete structure segment 104 to adapt to the complex load conditions of deep-sea environments.

[0066] As an example, the reinforced steel cylinder 105 and the steel structure section 103 can be integrally formed, wherein the top wall of the reinforced steel cylinder 105 is integrally connected to the top plate 1, the bottom wall of the reinforced steel cylinder 105 is integrally connected to the bottom plate 2, and the side wall of the reinforced steel cylinder 105 is integrally connected to the side plate 3, but not limited thereto; or the reinforced steel cylinder 105 and the steel structure section 103 can be independently connected together, all of which are within the protection scope of this disclosure, but not limited thereto.

[0067] Before the concrete structure section 104 is poured, the steel structure section 103 and the reinforced steel cylinder 105 can form a temporary load-bearing system to meet the construction needs in the harsh environment of the deep sea.

[0068] Continue to refer to Figure 3 According to an exemplary embodiment of this disclosure, the steel-concrete connection structure 11 further includes a stiffening rib 8. One side of the stiffening rib 8 is fixed to the inner wall surface of the steel structure segment 103, and the other side extends toward the inner cavity of the steel structure segment 103. One end of the stiffening rib 8 is fixed to the second end of the pressure plate 5 and extends away from the pressure plate 5. In this embodiment, the stiffening rib 8 connects the pressure plate 5 and the steel structure segment 103, thereby improving the structural strength of the steel-concrete connection structure 11.

[0069] Furthermore, the steel-concrete connection structure includes multiple stiffening ribs 8, which are uniformly arranged circumferentially along the steel structure segment 103, thereby improving the load-bearing capacity of the steel-concrete connection structure, but not being limited thereto. As an example, the extension directions at both ends of the stiffening ribs 8 may be parallel to the extension directions of the prestressing tendons 7, and the extension directions on both sides of the stiffening ribs 8 may be parallel to the extension directions of the structural reinforcing ribs 4, but not being limited thereto.

[0070] This disclosure improves the load-bearing capacity of the steel structure section 103 by providing stiffening ribs 8 between the inner wall of the steel structure section 103 and the bearing plate 5, thereby improving the load-bearing capacity of the steel-concrete connection structure 11.

[0071] This disclosure improves the reliability of floating wind turbine foundations by using a steel-concrete connection structure 11 between the steel structure and the concrete structure to achieve reliable force transmission between the steel structure and the concrete structure. It is particularly suitable for deep-sea wind turbine generators, but not limited thereto.

[0072] Since the steel-concrete connection structure 11 includes a connected steel structure section 103 and a concrete structure section 104, it has the high strength characteristics of steel structure and the high compressive strength and high durability characteristics of concrete structure. The steel structure section 103 and the concrete structure section 104 can work together to bear various loads, enabling the steel-concrete connection structure 11 to adapt to the complex and ever-changing marine environment and improve the reliability of the floating wind turbine foundation.

[0073] Furthermore, since concrete structures are less expensive than steel structures, the steel-concrete connection structure 11 combines steel structure segment 103 and concrete structure segment 104, reducing the overall steel consumption and manufacturing costs while ensuring the overall structural strength of the steel-concrete connection structure 11.

[0074] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0075] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0076] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0077] The features, structures, or characteristics described in this disclosure can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the foregoing description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

Claims

1. A steel-concrete connection structure for a floating wind turbine foundation, characterized in that, For connecting concrete and steel structures, the steel-concrete connection structure (11) includes: Pressure plate (5). A concrete structure segment (104) is used to connect the concrete structure and is disposed on the first side of the bearing plate (5). The concrete structure segment (104) includes a plurality of prestressed tendons (7) fixed to the first side of the bearing plate (5) and extending away from the bearing plate (5). Concrete is poured between the plurality of prestressed tendons (7). The steel structure section (103) is fixed to the second side of the bearing plate (5) for connection with the steel structure.

2. The steel-concrete connection structure of the floating wind turbine foundation according to claim 1, characterized in that, The steel structure section (103) is cylindrical, and the outer periphery of the pressure plate (5) is fixed to the inner wall of the steel structure section (103).

3. The steel-concrete connection structure of the floating wind turbine foundation according to claim 2, characterized in that, The pressure plate (5) includes a grid structure with at least two cell chambers, and the prestressed tendons (7) are arranged on the edge of each cell chamber.

4. The steel-concrete connection structure of the floating wind turbine foundation according to claim 1, characterized in that, The concrete structural section (104) also includes a plurality of structural reinforcing bars (4), which are embedded in the concrete structural section (104) and arranged at an angle to the prestressed tendons (7).

5. The steel-concrete connection structure of the floating wind turbine foundation according to claim 4, characterized in that, The concrete structural section (104) has an internal cavity. The structural reinforcing ribs (4) are arranged perpendicular to the prestressing ribs (7). The steel-concrete connection structure also includes a reinforcing steel cylinder (105). The reinforcing steel cylinder (105) is connected to the bearing plate (5) and extends away from the bearing plate (5). The reinforcing steel cylinder (105) is wrapped around at least a portion of the outer periphery of the concrete structural section (104). The structural reinforcing ribs (4) are arranged perpendicular to the cavity wall at their location and connected to the reinforcing steel cylinder (105).

6. The steel-concrete connection structure of the floating wind turbine foundation according to claim 5, characterized in that, The reinforced steel cylinder (105) and the steel structure section (103) are integrally formed.

7. The steel-concrete connection structure of the floating wind turbine foundation according to claim 1, characterized in that, The steel-concrete connection structure (11) also includes a stiffening rib (8), one side of which is fixed to the inner wall of the steel structure section (103), and the other side extends toward the inner cavity of the steel structure section (103). One end of the stiffening rib (8) is fixed to the second side of the pressure plate (5), and the other end extends away from the pressure plate (5).

8. The steel-concrete connection structure of the floating wind turbine foundation according to claim 7, characterized in that, The steel-concrete connection structure (11) is provided with a plurality of stiffening ribs (8), which are uniformly arranged along the circumference of the steel structure section (103).

9. A floating wind turbine foundation, characterized in that, It includes a concrete structure, a steel structure, and a steel-concrete connection structure (11) connecting the concrete structure and the steel structure according to any one of claims 1-8.

10. The floating wind turbine foundation according to claim 9, characterized in that, The steel structure segment (103) and the steel structure are integrally formed, and / or the concrete structure and the concrete structure segment (104) are integrally cast.

11. The floating wind turbine foundation according to claim 9, characterized in that, The concrete structure includes multiple pontoons (10) and side columns (12). The pontoons (10) have a first internal cavity, and the side columns (12) have a second internal cavity. The multiple pontoons (10) are connected end to end to form a polygonal ring structure. The side columns (12) are located at the connection between two adjacent pontoons (10).

12. The floating wind turbine foundation according to claim 11, characterized in that, The steel structure includes multiple bottom supports (9), which are shell structures. One end of the multiple bottom supports (9) intersects with the other end, which is connected to the corresponding pontoon (10).

13. The floating wind turbine foundation according to claim 12, characterized in that, The steel structure also includes a central column (14) and a connecting support (13). The central column (14) is located at the intersection of the multiple bottom supports (9) and extends upward from the bottom supports (9). The connecting support (13) is connected between the central column (14) and the side column (12).

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