Charles H. Trautmann

Overview of Some EPRI Research for Transmission Line Structure Foundations

An overview is presented of the general accomplishments of the large and comprehensive EPRI Research Project RP1493-4. A brief summary also is included of accomplishments under RP1493-1,2,3. The breadth and depth of these research efforts are described, and the project output is summarized. Basically, this project has led to major research advances, significant analysis/design improvements, and substantially new recommendations in the following areas: analytical modeling, load testing, soil property evaluation and probabilistic modeling, reliability-based analysis and design, drilled shaft behavior under uplift, compression, lateral, moment, and combined loading modes for both static and cyclic loading, and grillage foundation behavior in static uplift loading. Key points on these topics are noted, and the technology transfer to date is summarized.