Risk Assessment Of Ship Collision With Bridge And Study On Preventive Measures

To meet the rapid economic development of our country, bridges stepping rivers and straits become increasing day and day. Correspondingly, the accident of ship-bridge collision happens frequently, which results in bridge damage only for the lighter punishment and bridge collapse and personal casualties for the worse. The accident that ship hits Jiujiang Bridge in No.325 national road causes an enormous response in society, which impels bridge engineer to ponder how to prevent ship-bridge collision or minimize the accident riskt? The domestic design specification for ship-bridge collision is too old and outdated to meet the requirement of bridge construction. In this context, Jiujiang Bridge in No.325 national road as were took as an example in this thesis, and it were investigated that the risk analysis of ship-bridge collision and the ship collision warning system based on multi-points and multi-sources video information fusion. The main research works in this thesis were listed as follows:1) The main reason, which leads to ship-bridge collision, was discussed, and then the risk of ship collision with Jiujiang Bridge was analyzed.2) Anti-collision measure of Jiujiang Bridge was designed and its effectiveness was validated based on pushover analysis.3) According to the characteristics of different warning technologies and the demanding of ship collision warning system, a novel ship collision warning system, based on the multi points and multi sources video information fusion, was proposed.4) The video information processing of the ship collision warning system was studied. Meanwhile the key technologies, including image preprocessing, ship identification, multi-points and multi-sources information fusion, were discussed.5) The evaluation method on ship collision warning events was proposed, and the early warning modes based on transient warning and active predicting were analyzed. 6) The ship collision warning system based on the multi points and multi sources video information fusion was applied to Jiujiang Bridge, and the structures of this system, including hardware and software, were introduced.Finally the prospect on the ship collision warning system based on the multi points and multi sources video information fusion was discussed, and the contents needing further focus were summarized.