Failure Analysis of a Temporary Power Line Anchor

摘要

Delayed fracture occurred to a temporary anchor supporting an overhead powerline during construction. The fracture resulted in loss of the overhead transmission line and resulted in a singe vehicle incident in the adjacent roadway. Post-failure analysis conducted as part of personal injury litigation revealed that the fracture was precipitated by a pre-existing weld related crack. Closed form and numerical stress analyses were conducted in order to assess the role of anchor installation in the failure, with the results indicating that installation was not conducted outside of the parameters intended by the anchor manufacturer.