Abstract
Wind loads are an important consideration in the structural design of high voltage (HV) transmission lines (TL). This study assessed the dynamic response of guyed towers for TL under various wind loads. The aim of the study was to determine if the simplified static-equivalent approach used in current TL codes is accurate. Two guyed tower configurations were considered: (1) a direct current (DC) line; and (2) an alternating current (AC) line. Bare and iced TL structures were modelled. Wind load transference from the conductor and ground wires was studied. The finite element method was used to evaluate the geometric nonlinearity of the cables and the tower mast. A full nonlinear transient dynamic analysis was also conducted to calculate wind loads at each time step. Four scenarios and 3 loading schemes were evaluated. The kinematics of large displacement and small strain were considered in both static and dynamic analyses. Results of the study indicated that dynamic effects have a significant influence on the overall response of the tower mast under wind loads. The static-equivalent method does not always provide a conservative estimate of possible dynamic responses. A simplified dynamic method using a proposed square root of the sum of the squares
More>>
Citation Formats
Gani, F, and Legeron, F.
Dynamic response of transmission lines guyed towers under wind loading.
Canada: N. p.,
2010.
Web.
doi:10.1139/L09-160.
Gani, F, & Legeron, F.
Dynamic response of transmission lines guyed towers under wind loading.
Canada.
https://doi.org/10.1139/L09-160
Gani, F, and Legeron, F.
2010.
"Dynamic response of transmission lines guyed towers under wind loading."
Canada.
https://doi.org/10.1139/L09-160.
@misc{etde_21285707,
title = {Dynamic response of transmission lines guyed towers under wind loading}
author = {Gani, F, and Legeron, F}
abstractNote = {Wind loads are an important consideration in the structural design of high voltage (HV) transmission lines (TL). This study assessed the dynamic response of guyed towers for TL under various wind loads. The aim of the study was to determine if the simplified static-equivalent approach used in current TL codes is accurate. Two guyed tower configurations were considered: (1) a direct current (DC) line; and (2) an alternating current (AC) line. Bare and iced TL structures were modelled. Wind load transference from the conductor and ground wires was studied. The finite element method was used to evaluate the geometric nonlinearity of the cables and the tower mast. A full nonlinear transient dynamic analysis was also conducted to calculate wind loads at each time step. Four scenarios and 3 loading schemes were evaluated. The kinematics of large displacement and small strain were considered in both static and dynamic analyses. Results of the study indicated that dynamic effects have a significant influence on the overall response of the tower mast under wind loads. The static-equivalent method does not always provide a conservative estimate of possible dynamic responses. A simplified dynamic method using a proposed square root of the sum of the squares (SRSS) was recommended. 19 refs., 8 tabs., 13 figs.}
doi = {10.1139/L09-160}
journal = []
issue = {3}
volume = {37}
place = {Canada}
year = {2010}
month = {Mar}
}
title = {Dynamic response of transmission lines guyed towers under wind loading}
author = {Gani, F, and Legeron, F}
abstractNote = {Wind loads are an important consideration in the structural design of high voltage (HV) transmission lines (TL). This study assessed the dynamic response of guyed towers for TL under various wind loads. The aim of the study was to determine if the simplified static-equivalent approach used in current TL codes is accurate. Two guyed tower configurations were considered: (1) a direct current (DC) line; and (2) an alternating current (AC) line. Bare and iced TL structures were modelled. Wind load transference from the conductor and ground wires was studied. The finite element method was used to evaluate the geometric nonlinearity of the cables and the tower mast. A full nonlinear transient dynamic analysis was also conducted to calculate wind loads at each time step. Four scenarios and 3 loading schemes were evaluated. The kinematics of large displacement and small strain were considered in both static and dynamic analyses. Results of the study indicated that dynamic effects have a significant influence on the overall response of the tower mast under wind loads. The static-equivalent method does not always provide a conservative estimate of possible dynamic responses. A simplified dynamic method using a proposed square root of the sum of the squares (SRSS) was recommended. 19 refs., 8 tabs., 13 figs.}
doi = {10.1139/L09-160}
journal = []
issue = {3}
volume = {37}
place = {Canada}
year = {2010}
month = {Mar}
}