CURRENT STATE OF RESEARCH ON FATIGUE STRENGTH OF THE WEB-FLANGE CONNECTION OF STEEL RUNWAY BEAMS

Abstract

This study investigates the current state of research on the fatigue strength of the web-flange connection in steel runway beams used in overhead cranes. The aim is to analyze the main factors affecting the fatigue strength of this connection, including the complex stress-strain behavior resulting from actual operational conditions, notch classification, and different web-flange configurations, such as welded, rolled, and combined connections. The research highlights the importance of accurately assessing the fatigue life of both new and existing structures, particularly those designed decades ago using simplified standards. The primary focus is on analyzing the results of previous studies. Key findings emphasize the influence of different notch classifications and the complex stress-strain behavior in this area, primarily due to the combined effects of bending, tensile, and compressive stresses, on the fatigue performance of crane runway beams. The study contributes to enhancing existing calculation methods and provides recommendations for future investigations aimed at improving fatigue verification methods and determining the effectiveness of using crane runway beams in different configurations to achieve the required fatigue life. Finally, practical implications suggest potential improvements in fatigue life prediction through detailed evaluation of different connection configurations and localized stress analysis.