American Society of Civil Engineers

Life-Cycle Cost Functions for Electrical Substations and Power Transmission Towers under Strong Winds in Mexico

by David De Leon, (Universidad Autónoma del Estado de México, Facultad de Ingeniería, Professor, Ciudad Universitaria, Cerro de Coatepec, Toluca, Estado de México, 50130 E-mail:, Alberto Lopez, (Institute de Investigaciones Eléctricas, Manager of Civil Engineering, Calle Reforma No. 113, Col. Palmira, Cuernavaca, Morelos, México, C.P. 62490), and Cuauhtemoc Cordero, (Comisión Federal de Electricidad, Coordinación de Proyectos de Transmisión y Transformación, coordinator)

pp. 1-12, (doi:

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Document type: Conference Proceeding Paper
Part of: TCLEE 2009: Lifeline Earthquake Engineering in a Multihazard Environment
Abstract: Life-Cycle cost functions for typical electrical substations and power transmission towers located on eolic zones of Mexico have been calculated and the effect of updating the maximum wind velocities over the unconditional annual failure probability is examined and discussed here. The impact that epistemic uncertainty of the maximum wind velocity has over the structures annual failure probability is explored and quantitatively assessed. The economical advantage of preventing failure consequences throughout extensive and further wind velocities recording is appraised and emphasized as a mitigation measure. Information from new recording campaigns is incorporated throughout Bayesian updating. The expected life-cycle cost of substations with and without additional wind velocity recording are estimated and the economic benefit of additional recording is measured for several levels of failure consequences. Information inferred from recent hurricanes is used to update the wind occurrence probability for a site.

ASCE Subject Headings:
Life cycles
Electric transmission structures
Wind loads