Author(s)

H. Chen, G. Y. Grondin & R. G. Drive

Abstract

A low carbon content, the addition of alloying elements, and improved mill practices have imparted high performance steel (HPS) with superior toughness, strength, and weldability. Its performance in fatigue, however, is not well understood. A research program presently being conducted at the University of Alberta has obtained the necessary material input parameters for fatigue life predictions. The fatigue performance of two different heats of HPS 485W steel is compared to two other grades of structural steel: A7 steel commonly found in older structures, and G40.21 350WT steel, commonly used in modern bridge structures. Stress or strain-controlled smooth specimen fatigue tests were conducted to obtain cyclic stress vs. strain curves, strain and stress amplitude vs. fatigue life curves, and energy per cycle vs. fatigue life c

Keywords