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Reliability-Based LRFD for Transmission Structures

by Alain H. Peyrot, Univ of Wisconsin-Madison, Dep of, Civil & Environmental, Engineering, Madison, WI, USA,
Habib J. Dagher, Univ of Wisconsin-Madison, Dep of, Civil & Environmental, Engineering, Madison, WI, USA,



Document Type: Proceeding Paper

Part of: Plastic and Other Limit State Methods for Design Evaluation

Abstract:

A simple reliability-based Load and Resistance Factor Design (LRFD) method is proposed for the structural design of electric transmission lines. With the proposed method, the designer is able to assign relative levels of reliability to different lines, to different structures within one line and to different components within one structure. Full implementation of the method will require statistical data on controlling limit states. Existing strength data have been studied and corresponding statistical models are proposed. It is shown that better strength data are needed, but also that engineering judgement, combined with existing data, can be used to start using the LRFD method immediately.

Subject Headings: Load and resistance factor design | Structural reliability | Structural design | Power transmission towers | Power transmission lines | Structural safety | Steel structures

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