Prevention and Safety Research of Bridge Life Cycle Risk Accidents

This study investigates the risk management of bridge engineering projects, a process characterized by high uncertainty due to its complexity, uniqueness, innovation requirements, and involvement of multiple stakeholders and variables.Through systematic analysis of domestic and international bridge accident cases, we categorize risk factors into two primary dimensions: natural hazards (including earthquakes, floods, debris flows, and typhoons) and anthropogenic causes encompassing design flaws, construction defects, operational mismanagement, overloading issues, and collision incidents (both marine and vehicular impacts).By conducting comparative case studies on multiple bridge collapse incidents, this research establishes three key findings: First, it synthesizes critical lessons from historical bridge failures through empirical analysis.Second, it proposes comprehensive safety strategies and risk prevention methodologies.Third, the paper emphasizes the crucial role of integrated life-cycle management in bridge engineering, spanning design optimization, construction quality control, and systematic maintenance protocols.The proposed framework provides practical safety measures and actionable recommendations for enhancing infrastructure resilience, particularly highlighting the necessity of implementing preventive maintenance systems and adopting advanced monitoring technologies throughout the structure's service life.