Development of a Reliability-Based Design Framework for Transmission Line Structure Foundations
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Volume 129, Issue 9
Abstract
This paper presents the reliability-based design (RBD) initiative sponsored by the Electric Power Research Institute for transmission line structure foundations. The role of RBD is presented within the context of geotechnical limit state design. Design parameters that are amenable to statistical description can be propagated systematically to a consistent measure of design risk using reliability techniques such as the first-order reliability method (FORM). Less quantifiable factors are incorporated approximately into RBD by judicious selection of the target reliability level. A simplified RBD approach based on the load and resistance factor design (LRFD) and multiple resistance factor design (MRFD) formats is proposed for practical implementation. The resistance factors for the LRFD and MRFD formats are calibrated rigorously using FORM to produce designs that can achieve a known level of reliability consistently.
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Copyright © 2003 American Society of Civil Engineers.
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Received: Nov 29, 2001
Accepted: May 22, 2002
Published online: Aug 15, 2003
Published in print: Sep 2003
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