Slidably deforming node device for transmission tower in mining subsidence area and design method of such slidably deforming node device

Abstract

The invention discloses a slidably deforming node device for a transmission tower in a mining subsidence area and a design method of such slidably deforming node device. The slidably deforming node device is characterized in that a connecting arm extends out of the upper right of a node plate, an oblong hole slideway is arranged on the left portion of a slidable rod piece, the left portions of a pair of connecting rod pieces are positioned in front of and behind the connecting arm respectively and are connected through connecting bolts while the right portions thereof are positioned in front of and behind the left portion of the slidable rod piece respectively and are fixedly connected with connecting bolts passing through the oblong hole slideway, and a slider is arranged between each two adjacent connecting bolts in the oblong hole slideway. The design method includes establishing a finite element calculation model; determining a displacement mode and displacement of a tower pedestal; calculating a maximum axial force value of the slidable rod piece at a node position under various upper load conditions; obtaining a design value of maximum pressure borne by the slidable rod piece at the node position. The slidably deforming node device is capable of improving integral structure deformation capability. The design method is capable of designing anti-deformation structures meeting engineering practice requirements.

Description

technical field [0001] The invention relates to the technical field of iron tower construction of power transmission lines, in particular to a device and a design method for a slidable deformation node of a power transmission tower in a mining area. Background technique [0002] With the increase of our country's energy demand, coal-based mineral mining and cross-regional power transmission projects are imperative, so power transmission projects across gobs will be inevitable, so the protection of power transmission structures in mining areas It is of great significance to study and ensure the safety and reliability of the transmission tower structure and the safe operation of the transmission line in the coal mine goaf. [0003] For the power transmission tower in the goaf, after the surface deformation occurs, the tower rods will generate greater stress, and corresponding strain will be generated to balance the deformation. On the other hand, since the tower mostly adopts...

AI Technical Summary

Problems solved by technology

Stress concentration is the main cause of node tearing, and its failure form is brittle failure, which will lead to low utilization of the material itself

After local damage occurs, if it is not repaired in time, it will affect the bearing capacity of the entire tower, and then affect the safe operation of the entire line

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