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Advisory Committee Chair

Fouad H Fouad

Advisory Committee Members

Robert Dowswell

Andrew Sullivan

Document Type

Thesis

Date of Award

2016

Degree Name by School

Master of Science in Civil Engineering (MSCE) School of Engineering

Abstract

The construction of steel transmission poles poses many challenges in the utility industry. One such challenge arises after the addition of the davit arm to the transmission pole and before the wiring is placed onto the davit arm. During this time, winds at certain speeds can cause excessive vibration in the connection between the davit arm and the transmission pole. This phenomenon is known as vortex shedding. The movement of the davit arm through vortex shedding can cause the connection between the davit arm and the transmission pole to fail. Many possible variables must be taken into account when dealing with such a problem. Some of these variables include plate thicknesses at the connection, length of the davit arm, height of the davit arm on the transmission pole, wind speed, etc. ANSYS software is used to analyze and demonstrate these situations in order to determine what course of action can be taken to prevent the failure of davit arm connections during construction. Generally, thickening the back plate that the davit arm is welded to reduce the stress concentration factor along with translating the brackets with the bolt holes more closely together. The knowledge garnered from this study would have a significantly positive effect on the utility industry and the construction practices that are commonly used in the field.

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