Crack Growth Analysis of Rail Transit Steel Bridge Components Based on Damage Tolerance

In recent years, the accidents caused by the instability and failure of the steel structure of the bridge occur frequently. Therefore, the research on high-performance steel members is one of the key directions of the development of Engineering Technology in the 21st century. In this paper, the damage tolerance evaluation method based on the finite element calculation of crack growth is used to analyze the fatigue of the load-bearing carbon fiber suspender with cracks in the operation stage, to correctly evaluate the remaining life and the remaining safety of the component, and to effectively handle Grasp the status and disease development of the bridge, so we can take timely and targeted measures to ensure the safety of the bridge.