CN-116575784-B - Self-resetting energy consumption node for wind power hybrid tower structure

CN116575784BCN 116575784 BCN116575784 BCN 116575784BCN-116575784-B

Abstract

The invention relates to the technical field of wind power generation towers, in particular to a self-resetting energy consumption node for a wind power hybrid tower structure, which comprises a prefabricated reinforced concrete column, unbonded prestressed reinforcement, energy consumption reinforcement, grouting sleeves, steel sleeves, friction type high-strength bolts, arc end plates and prefabricated steel beams, wherein the unbonded prestressed reinforcement is vertically arranged in the prefabricated reinforced concrete column, the energy consumption reinforcement is reserved at the top, the grouting sleeves are embedded at the bottom, the connection and the restoration of concave-convex surfaces of an upper prefabricated reinforced concrete column and a lower prefabricated reinforced concrete column are realized through grouting and prestressing, the bolts are welded in the steel sleeves and embedded on the surfaces of the prefabricated reinforced concrete column, the arc end plates are welded at the ends of the prefabricated steel beams, the friction type high-strength bolts horizontally penetrate through the arc end plates, the prefabricated reinforced concrete column and the steel sleeves in sequence, so that the connection of the prefabricated steel beams and the prefabricated reinforced concrete column is realized, the node is convenient to construct, the energy consumption capability is high, and the residual deformation of the node is effectively controlled, and the node is suitable for wind power hybrid tower connection.

Inventors

YANG BU
LI FENG
WANG YUHANG
HUANG XIAOGANG
JIA CHUANGUO
LI SHENGDIAN
WANG WANTING

Assignees

重庆大学

Dates

Publication Date: 20260508
Application Date: 20230508

Claims (10)

1. The self-resetting energy consumption node for the wind power hybrid tower structure is characterized by comprising at least two prefabricated reinforced concrete columns (1) to be connected, a steel sleeve (5) and a prefabricated steel beam (8), wherein the bottom and the top of each prefabricated reinforced concrete column (1) are respectively provided with matched concave and convex interfaces, an overhanging energy consumption steel bar (3) is reserved at the top, a grouting sleeve (4) for connecting and fixing the energy consumption steel bar (3) is correspondingly arranged at the bottom, and a plurality of unbonded prestressed steel bars (2) are vertically arranged in each prefabricated reinforced concrete column (1) to apply prestress; The steel sleeve (5) is fixed on the upper part of the precast reinforced concrete column (1), so that joints are formed between the columns, and energy-consuming steel bars are subjected to nonlinear deformation in the process of opening and closing the joints, so that energy is dissipated; The end part of the prefabricated steel beam (8) is welded with an arc-shaped end plate (7), the friction type high-strength bolt (6) horizontally penetrates through the arc-shaped end plate (7), the prefabricated reinforced concrete column (1) and the steel sleeve (5) in sequence, and the bolt pretightening force is applied to realize connection of the prefabricated steel beam (8) and the prefabricated reinforced concrete column (1).
2. The self-resetting energy consumption node for the wind power hybrid tower structure according to claim 1, wherein the arc-shaped end plate (7) and the steel sleeve (5) are provided with two rows of bolt holes along the height direction of the prefabricated reinforced concrete column (1), and the number, the size and the distance between the bolt holes of the arc-shaped end plate (7) and the steel sleeve (5) are kept consistent.
3. The self-resetting energy consumption node for the wind power hybrid tower structure according to claim 2, wherein the prefabricated reinforced concrete column (1) is characterized in that before a factory is used for formwork erection and concrete pouring, the steel sleeve (5) is arranged at the end part of a steel bar in the prefabricated reinforced concrete column (1) to serve as a dismantling-free part template, an embedded pipe is arranged in the horizontal direction to penetrate through a bolt hole of the steel sleeve (5) and the inside of the prefabricated reinforced concrete column (1), and after concrete pouring is completed, the steel sleeve (5) is fixed on the surface of the prefabricated reinforced concrete column (1), and a bolt hole channel is formed in the horizontal direction of the prefabricated reinforced concrete column (1).
4. A self-resetting energy consumption node for a wind power hybrid tower structure according to claim 1,2 or 3 is characterized in that pins (9) which are uniformly distributed in the circumferential direction are welded on the inner wall of the steel sleeve (5), and the pins (9) are embedded and fixed on the surface of a precast reinforced concrete column (1).
5. A self-resetting energy consumption node for a wind power hybrid tower structure according to claim 1, 2 or 3 is characterized in that at least 4 energy consumption steel bars (3) extend outwards from the top of the prefabricated reinforced concrete column (1), the energy consumption steel bars (3) are uniformly distributed along the circumferential direction of the prefabricated reinforced concrete column (1), the rest of longitudinal steel bars are disconnected, and the energy consumption steel bars (3) are vertically inserted into a grouting sleeve (4) to be fixedly connected in a grouting manner.
6. The self-resetting energy consumption node for the wind power hybrid tower structure according to claim 1, wherein the end part of the prefabricated steel beam (8) is welded with the arc-shaped end plate (7) in a factory prefabrication mode, so that the prefabricated steel beam with the arc-shaped end plate is obtained.
7. A self-resetting energy consumption node for a wind power hybrid tower structure according to claim 1, wherein the unbonded prestressed reinforcement (2) adopts 1860-level prestressed steel strands.
8. The self-resetting energy consumption node for the wind power hybrid tower structure according to claim 1, wherein the cross section of the prefabricated reinforced concrete column (1) is in a hollow circular ring shape, and the steel sleeve (5) is a circular steel tube.
9. A self-resetting energy consumption node for a wind power hybrid tower structure according to claim 1, wherein the section of the prefabricated steel beam (8) adopts I-shaped or H-shaped steel.
10. The self-resetting energy consumption node for a wind power hybrid tower structure according to claim 1, wherein the convex interface is in a shape of a circular truncated cone and is arranged on the central shaft of the prefabricated reinforced concrete column (1).

Description

Self-resetting energy consumption node for wind power hybrid tower structure Technical Field The invention relates to the technical field of wind power generation towers, in particular to a self-resetting energy consumption node for a wind power hybrid tower structure. Background Along with the rapid development of the economy in China, the demand for energy sources, particularly renewable energy sources, is increasing, and wind power is becoming more and more important as a renewable clean energy source because the technology is the most mature, and the wind power has the large-scale development condition and commercial development prospect. Most of the land wind power towers adopt steel structure towers, and the land wind power towers become the most main supporting structure form of the wind power generator set with the hub height of 100 meters or less because of convenient manufacture, lighter weight and high installation speed. At present, the land wind power large-scale machine area is gradually shifted to the middle eastern area, and the areas belong to low wind speed areas, so that the hub height, the single machine capacity and the blade length of the wind turbine generator are required to be greatly improved for obtaining higher power generation efficiency and power generation capacity. For the wind turbine generator set in the low wind speed area, the conventional steel structure tower drum can bring the problems that 1, the self-vibration frequency of the tower drum structure is lower and is easier to approach the rotation frequency of the wind wheel, the resonance risk is increased, and 2, the steel tower drum has small side-resistant rigidity, and the deformation adaptability is strong, but the swing amplitude is larger and the fatigue problem is outstanding during the running of the wind turbine generator set, so that the structural safety is affected. It can be seen that the support form of the traditional steel structure tower is difficult to meet the requirements of wind energy development in the land low wind speed area in China. Aiming at the new requirements of wind power generation, three factors including cost, technology and construction are comprehensively considered, the steel beam-reinforced concrete column mixed frame type tower structure is a feasible structural type, the lower stress area of the steel beam-reinforced concrete column mixed frame type tower structure still adopts a traditional steel structure tower barrel, the lower stress area of the steel beam-reinforced concrete column mixed frame type tower structure adopts a prefabricated reinforced concrete column-steel beam mixed frame type tower, but in actual use, a connecting node faces the following challenges, 1, the problem of connection between the prefabricated reinforced concrete column and the column is solved, because the wind tower is of a high-rise structure, the top concentrated mass is high, a large overturning moment can be caused under the action of strong wind or strong vibration, the axial force of the column can be greatly changed, the concrete is easy to crack, the steel beam-reinforced concrete column mixed frame type tower structure is obviously different from the traditional frame structure in stress characteristics, and the problem of how to avoid the column from bending damage is avoided, the reliable connection between the prefabricated reinforced concrete column and the column is guaranteed, and how a good energy consumption mechanism and a damage mode are to be solved. 2, the connection problem between precast concrete post and the girder steel, though traditional post through reinforced concrete post-girder steel node simple structure, it is clear that the biography power is clear and definite, but girder steel location and on-the-spot welded construction mode cause the high altitude construction degree of difficulty to increase, and construction quality and efficiency are difficult for guaranteeing, consequently to this kind of high-rise structure of wind power generation pylon, traditional post through reinforced concrete post-girder steel node structure no longer is suitable for, so need propose a new pylon node connection structure to solve the connection problem between the precast concrete post and between precast concrete post and the girder steel. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a self-resetting energy consumption node for a wind power hybrid tower structure, which aims to solve the problems of concrete cracking and frame column stretch bending damage caused by strong shock or strong wind of a steel beam-reinforced concrete column hybrid frame tower structure and low construction and installation efficiency. The self-resetting energy consumption node for the wind power hybrid tower structure comprises a prefabricated reinforced concrete column, unbonded prestressed reinforcement, energy consumption reinforcement, a grouting sleeve,