Based Onthe Shape Of Pier Vessel-bridge Collision Research By Numerical Simulation Analysis And Its Test Scheme

The development of the amphibiouscrossing transportation system promote theconstruction of cross channel bridge, a large number of bridge across theriver construction greatly improve the vessel-bridge collision risk, collision accidentsrepeatedly occur. Therefore, the vessel-bridge collision issue becomes the focus ofattention for the design of the pier and the whole bridges. In recent years, with the rapiddevelopment of finite element technology, numerical simulation has been widelyadopted in the research of vessel-bridge collision, at the same time it is proven with test.Based on the present state of research,this paper discusses the vesselcollision force influence of different pier section, the height of pier and reinforcementratio, and with a test plan. The main contents are as following:①Survey and statistic cross river bridge and ship characteristics in Yangtze RiverBasin. Respectively narrate the impact of collision from bridge type, the shape of piersection, water level changes, the types of ships and other factors， selectingthe rectangular, round, round-shaped, tip shaped four section as the researchmodel;175mlevel;2000DWT and5000DWT bulk cargo, and provide the basis for thesimulation analysis.②Through the numerical simulation analysis of different pier section shape andheight, getting the conclusion is that the most resistant collision to the shape of pier iscircular double column piers and from the vessel-bridge collision view, the optimalpier height is less than50m.③Analyzing reinforcement ratio for the pier anti collision force.According tosurvey and statistic the pier reinforcement ratio on the Yangtze river, the commonlyused reinforcement ratio is1%. On the basis of this, increasing and decreasing of0.2%respectively.Comparative analysis of influence of the reinforcement ratio on the shipcollision force, only0.46%of the increasing or decreasing of collision force and theactual anti-collision engineering provide reinforcement reference. Preliminary studycomprehensive stiffness on vessel-bridge collision and considers the pierand ship stiffness on vessel collision force of impact.④Vessel-bridge collision test plan based on pier stiffness of sectionshape.According to the principle of vehicle collision,simulating the vessel-bridgecollision and proving the numerical simulation results of third chapter. Finally, the research contents of this article are summarized; some conclusionshave significant reference to the actual project.