Multiaxial fatigue life assessment of a vertical-lift bridge connection using strain rosette data

摘要

Fatigue-induced damage is one of the most common types of damage experienced by civil engineering structures subjected to cyclic loading such as bridges. The applicability of multiaxial non-proportional fatigue life assessment is shown using strain measurements collected from a welded gussetless truss connection of a vertical-lift bridge. Methods for uniaxial loading and multiaxial non-proportional loading are compared. It is shown that non-proportional loading can cause a significant decrease in the estimates of remaining fatigue life.