Design methods for tower structures, manufacturing methods for tower structures, and tower structures

Abstract

This invention provides a design method for a tower structure, a manufacturing method for a tower structure, and a tower structure itself. This method maximizes the length of the steel pipes constituting the tower structure while forming a rational structure corresponding to the design external force varying in the height direction of the tower structure, thereby reducing the amount of steel used in the tower structure. The design method for a tower structure, wherein the tower structure is constructed by welding multiple steel pipes stacked in the height direction together, includes: a preliminary design step, in which a first steel type with a first yield strength σy1 is used for all the multiple steel pipes, and under the design condition that the thickness difference between two adjacent steel pipes is below a pre-set limit value, the tower structure is designed using the allowable stress design method, thereby calculating the thickness tc1 of each of the multiple steel pipes; and a region setting step, in which a region including a reference height h0 and a range of 0° is defined as the maximum outer diameter of the tower structure in the height direction. In the region of 0.8 to 2.4 times, the reference height h0 is the height at which the bending moment in the bending moment distribution in the height direction of the tower structure designed through the preliminary design steps reaches its maximum; and in the main design steps, among the multiple steel pipes, for the steel pipes in the region, a second steel type with a second yield strength σy2 that is greater than the first yield strength σy1 is adopted, and for the steel pipes outside the region, the first steel type is adopted, and under the design condition that the plate thickness difference between two adjacent steel pipes is below the limit value, the tower structure is designed using the allowable stress design method, thereby calculating the plate thickness tc3 of each of the multiple steel pipes.

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