Evaluation Method and Application for Bridge Anti-collision Performance of Existing Anti-collision Facility
How to conduct a reasonable and effective evaluation on bridge anti-collision performance,especially to evaluate the protective effect of anti-collision facilities accurately?It is one of the difficulties in rectifying ship-bridge collision hazards for existing bridges.To accurately evaluate the anti-collision performance for existing bridges after installing anti-collision facilities,based on existing standards and related study results,combined with a large amount of engineering project experience,a standardized framework process for anti-collision performance evaluation on existing bridges is established from the aspects of overall anti-collision performance evaluation,determination of anti-collision performance standards,determination of representative ship types for fortifications,calculation of ship impact forces,analysis on anti-collision facility protection effects,calculation of pier ship collision effects,and anti-collision performance verification.Taking the main pier No.3 of a certain Yangtze River highway bridge for an example,the above method is used to evaluate the bridge's anti-collision performance.The result indicates that under typical calculation conditions,the anti-collision facilities play a good role in energy consumption buffer protection effect.The impact time is prolonged,and the impact force is reduced.The peak force reduction rates for ship frontal and side collisions are 47.2%and 51.6%respectively.When the protective effect of anti-collision prevention facilities is not considered,the anti-collision performance of the main pier No.3 does not meet the requirements.It is mainly manifested as insufficient shear resistance performance of pier body and pile foundation in transverse direction of bridge.After considering the protective effect of anti-collision facilities,the insufficient shear resistance of pier body and pile foundation in transverse direction of bridge is improved,and the anti-collision performance of bridge pier can meet the requirements.The standardized framework process for evaluating anti-collision performance of existing bridge anti-collision facilities is comprehensive.It can be used for evaluating the anti-collision facilities and performance of existing bridges.
bridge engineeringanti-collision performance evaluationfinite element methodship-bridge collisionanti-collision facility
NETL
NSTL
万方数据
