Design method for power transmission line steel pipe tower variable slope joint

Abstract

The invention relates to a design method for a power transmission line steel pipe tower variable slope joint. The joint comprises an upper main pipe, a lower main pipe, an upper flange plate and a lower flange plate, and the upper flange plate and the lower flange plate are arranged between the upper main pipe and the lower main pipe. The upper flange plate is provided with a first branch pipe. The lower flange plate is provided with a second branch pipe and a third branch pipe which are connected. Bolts and rib plates are perpendicularly arranged on the flange plates. The design method comprises the steps that when the situation that the axes of the flange plates are subjected to tension action is determined, the tension of the bolt which is stressed maximally on the flange plates is N<tmax1>; when the situation that the flange plates are subjected to the combined action of the tension and the bending force or the combined action of the pressure and the bending force is determined, the tension of the bolt which is stressed maximally on the flange plates is N<tmax2>; the maximum value N<tmax> between the tension N<tmax1> and the tension N<tmax2> is determined; the height of the rib plates is determined according to the pipe diameter of the upper main pipe in the variable slope position; the thickness of the rib plates is determined according to the height of the rib plates and N<tmax>; and the thickness of the flange plates is determined according to N<tmax>. The technical scheme presents the more standardized and systematic design method and provides a basis for the design of the power transmission line steel pipe tower variable slope joint.

Description

Technical field: [0001] The invention relates to the structural design of a steel pipe tower of a power transmission line, and more particularly relates to a design method for a slope-changing node of a steel pipe tower of a power transmission line. Background technique: [0002] Compared with traditional transmission angle steel towers, transmission steel pipe towers have been widely used in recent years because of their advantages such as low wind pressure and good mechanical performance. However, the node structure of the transmission steel pipe tower is often complicated, and the node design becomes an important link in the design of the transmission steel pipe tower. Especially for the variable slope node of the tower body (the position of the variable slope node on the transmission steel pipe tower is as follows figure 1 As shown), because there are usually multiple rods connected, the axes of the upper and lower main pipes are not collinear, and the force is complica...

AI Technical Summary

Problems solved by technology

This situation leads to the design work of slope joints, which relies too much on personal experience and subjective understanding, lacks continuity and standardization, which leads to low work efficiency, potential safety hazards, and uneven design accuracy. Make nodes too redundant, conservative and complex

Images