Abstract：Based on the analysis of the effect of thunder and lightning environment on Yangtze river highway bridge in Maanshan city,combined with the structural characteristics of the bridge,this paper gives an intensive study on protection measures of direct lightning,side flash,and equipotential as well as lightning surge invasion of the bridge according to level two lightning protection requirements.It focuses on the investigation of thunder and lightning protection points,such as project lightning,turning down,ground connection,voltage-sharing,equipotential,distribution system and signal system etc.Then,some scientific,reliable,economical and reasonable bridge anti-thunder measures are obtained.Meanwhile,the impact of magnetic field intensity on vessels passing through the fairway which is generated by lightning stroke is calculated and analyzed.The results indicate that only when the minimum safe distance between lightning stroke and the hull is not less than 14.9 m,the external device and signal of the vessel can not be disturbed.
2014, Vol. 31 
