Fatigue Damage Mechanism and Life Prediction of Steel Structure Joints in Super High-Rise Buildings

Abstract

With the acceleration of urbanization, super high-rise buildings have increasingly become iconic structures of modern cities. The fatigue damage of their steel structure joints directly affects the safety and durability of the building structures. This paper systematically studies the fatigue damage mechanism and life prediction methods of steel structure joints in super high-rise buildings. By combining theoretical analysis, experimental research, and numerical simulation, it deeply analyzes the fatigue damage mechanism from both microscopic and macroscopic perspectives, and explores the influence mechanisms of factors such as materials, structures, loads, and environments on fatigue damage. In terms of fatigue life prediction, it comprehensively compares and analyzes prediction methods based on S-N curves, fracture mechanics, damage mechanics, numerical simulation, and intelligent algorithms, and expounds the principles, application processes, and applicable scenarios of each method.