Reliability-Centered Management of Wood Transmission Lines

by James M. Treat, Engineering Data Management Inc, Fort Collins, United States,
Patrick J. Hasenoehrl, Engineering Data Management Inc, Fort Collins, United States,
Andrew H. Stewart, Engineering Data Management Inc, Fort Collins, United States,

Document Type: Proceeding Paper

Part of: Probabilistic Mechanics and Structural and Geotechnical Reliability


Through implementing reliability-centered management concepts, more cost-effective management of wood pole transmission lines may be achieved. By identifying individual structures and line components with lower reliabilities and concentrating maintenance efforts on them, overall line reliability and maintenance costs can be optimized. Additionally, long-term maintenance costs can be quantified and the potential for outages reduced. By integrating local loading conditions with field measurements of pole strength (obtained through nondestructive evaluation) and observed structure condition, an assessment of structural loading requirements versus current structural capacity can be completed and reliability levels calculated. These reliability levels are compared to code requirements and are the basis for recommendations for structural upgrade or replacement. Utilities, such as Idaho Power Company (IPCo), are currently using reliability-centered management techniques to aid in long-term management of power transmission lines.

Subject Headings: Structural reliability | Structural analysis | Load bearing capacity | Wood | Power transmission | Power transmission lines | Power transmission poles | Load factors | Idaho | United States

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