Connection device of prestress concrete and steel combination wind power generation tower

Abstract

The invention relates to a connection device of a prestress concrete and steel combination wind power generation tower. The lower surface of a lower connection flange is provided with anchor bars connected with a concrete tower section. The connection device is further provided with prestress application components, a tension anchor flange and the lower connection flange are respectively and uniformly provided with flange holes for the prestress application components to pass, and the flange holes of the tension anchor flange are the same as those of the lower connection flange in quantity and correspond to the flange holes of the lower connection flange in a one-to-one mode in the vertical direction. The prestress application components sequentially penetrate through the flange holes of the anchor flange and the flange holes of the lower connection flange and penetrate through the concrete tower section on the lower portion. The top ends of the prestress application components are anchored on the top face of a lower section connection steel cylinder through anchorage devices after the prestress application components are tensioned. Concrete is poured between the tension anchor flange and the lower connection flange to form a prestress concrete structure. Due to the connection mode, the concrete on the flange connection section is uniformly stressed, stress concentration is reduced, the tensile stress level of the concrete is improved, and the situation that the concrete cracks is avoided.

Description

technical field [0001] The invention relates to a wind power generation tower, in particular to a connection device between a concrete tower section and a steel tower section of a wind power generation tower. Background technique [0002] Wind energy is a clean energy with a large resource reserve, and it is also one of the new energy types that are currently being developed at home and abroad. my country's wind resources are widely distributed, and there are good wind resources in the northwest, central and eastern coastal areas. The development prospect of wind power is quite broad. At this stage, in order to solve the problems of transportation, cost, durability and service life of traditional steel towers, it has become a new choice to use concrete and steel to form concrete and steel composite structure towers. In this composite tower, the connection between the concrete tower section and the steel structure tower section is the key to ensure the safety of its structur...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to solve the problem that the concrete has tensile stress and compressive stress distribution inconsistency in the connection method of connecting the steel section and the concrete section in the existing combined structure wind power generation tower, and it is difficult to control and meet the requirements of the reinforced concrete crack width in the concrete tower section. Insufficient in the requirements of the design specification for the crack width, etc., a prestressed concrete-steel composite wind power tower connection device is provided to reduce the unevenness of the compressive stress distribution on the top of the concrete tower and reduce the concrete on the lower surface of the steel flange. The magnitude of the tensile stress avoids local compression on the top of the concrete tower. At the same time, by introducing prestress, the concrete tower section is in a state of vertical compressive stress, effectively controlling the crack width of the concrete tower section, or avoiding cracking of the concrete tower section, thereby improving the composite tower. Structural safety, durability and fatigue resistance properties of frame structures

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