In this paper, the definition and process of vulnerability analysis of vessel-bridge collision are put forward to provide the basis on the design and reinforcement of vessel-bridge collision. The factors that affect the vulnerability of vessel-bridge collision can be described as random variable. The vulnerability of vessel-bridge collision can be expressed as structural reliability problems. The structural reliability theory is introduced to calculate the failure probability of bridge structure under different tonnage of vessel-collision. vulnerability curve can be obtain by curve fitting.
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