Peak Stress Method-Based Fatigue Predictions for Steel Crane Girder Variable-Section Supports

Engineering applications have shown that variable-section supports of steel crane girders are prone to fatigue fracture, and traditional prediction experience is not applicable these types due the complex internal stresses caused by their unique geometries. In this paper, a new approach was proposed for based on peak stress method; can locate initiation sites predict lives under axial bending loading. Then, some constant-amplitude test results were presented typical girders. A comparison made between experimental theoretical estimations using method. The indicated method appropriate estimate life up crack in subjected loads.