蔡家嘉陵江大桥船撞风险分析与设防标准研究

Ship Collision Risk Analysis and Protection Standard Study of Caijia Jialing River Bridge

为确定重庆市蔡家嘉陵江大桥设防船撞力标准,采用美国AASHTO规范方法和三概率参数积分路径方法对该桥进行防撞风险分析,计算桥梁的碰撞概率和年倒塌频率,并与可接受的风险准则进行比较。确定防撞设计代表船型,采用LS-DYNA软件对船舶碰撞桥梁进行数值分析。

In order to determine the anti-ship collision force standard for Chongqing Caijia Jialing River Bridge,this paper adopted AASHTO method and the tri-probability parameter integral path method for anti-collision risk analysis of this bridge,so to calculate the collision probability and annual collapse frequency of the bridge,and compared the results with acceptable risk criterion.Then the representative ship type for anti-collision design was determined,LS-DYNA software was used to carry out numerical analysis to ship collision for the bridge.