Videos

Mitigating Vortex Induced Vibration on Steel Pole Davit Arms
EPRI is conducting research as part of a supplemental project on steel pole davit arms and their vibration performance. This project has involved research into vortex induced vibration, development of a software tool to assess risk, and assessment of the fatigue life of davit arms. This video depicts EPRI’s test setup at an area wind tunnel where the onset of vortex induced vibration was being investigated.

EPRI Software Demo: Op10 Version 2.0 – Optimal Line Tension Calculator
Over the past few years EPRI has been in development of a software program Op10 that may be used to optimize transmission line tension against a number of line parameters including structure loading, conductor vibration, clearances and more. In 2022, EPRI released version 2.0 of Op10 that included a simplified, streamlined module for performing quick conductor tension checks. Here is a recording from a software demo given in February 2023 by EPRI Technical Executive Pierre Marais on the features of Op10v2.0

EPRI Software Demo: Post Insulator Capacity Calculator (PICC) version 2.0
As part of a supplemental project for P25.007, EPRI has conducted extensive testing on the mechanical strength of polymer insulator systems. This testing has culminated in the PICC software used for calculating interaction diagrams for post and braced post polymer insulator systems. In this video from December 2022, EPRI engineers Pierre Marais and David Folk discuss EPRI’s insulator testing program and provide a demo on PICCv2.0.

Vibratory Caisson Foundation Pull Test
In May 2023 in Edenton, NC, EPRI conducted a lateral test to failure of a vibratory caisson foundation. While these foundations have commonly been used in the transmission industry, there has been very few tests completed to support existing design practices. This video, taken as part of EPRI’s Design and Installation of Vibrated Steel Caissons Supplemental Project, depicts 2 days of a lateral pull test with synchronous load tracking.

Vibratory Caisson Foundation Test - Marengo, IA
In October 2023 in Marengo, IA, EPRI conducted its third foundation test to failure as part of its Design and Installation of Vibrated Steel Caissons supplemental project. These tests help EPRI engineers understand the soil mechanics of laterally loaded vibrated steel caissons in an effort to develop design procedures for utility engineers. This video depicts an overview of the test including caisson installation, the site layout, and the lateral test to failure.