船舶撞击力作用下高桩码头的安全评估

针对高桩码头水平承载力,应用极限概率理论分析了荷载效应的统计参数;根据构件破坏准则,确定了码头破坏模式和功能函数;依托某码头实例,建立响应模型,计算其失效概率及可靠指标。分析的结果认为,船舶撞击能和船舶撞击力符合极值I型分布;高桩码头的主要破坏为桩基础的正截面受弯破坏和水平位移过大;结合某码头工程实例,利用ANSYS有限元分析软件建立结构响应模型和PDS模块,采用蒙特卡罗的方法进行可靠性分析,共进行了10万次抽样,抽样的结果显示,码头受船撞作用失效的概率为2.073 05×10-3,可靠指标为3.76,安全结构等级为2级。

Safety assessment of piled wharf under ship impact force

Based on a piled wharf under the horizontal load,we apply the probabilistic limit state design method to obtain the statistical parameters of load effects variables,study the resistance of structural and distribution of statistical parameters;ascertain the failure criterion,and establish the structural response model by ANSYS PDS with a wharf case.The analysis results show that the impact energy and the impact force fit the extreme type I distribution best,and the bending failure and displacement criterion are leading controls.Taking a terminal project for example,we establish the structural response model and PDS module of ANSYS finite element.The Monte Carlo method is used during reliability analysis.The sampling results of a total of 100 000 times of samples show that the failure probability of the terminal under ship impact force is 2.073 05 × 10-3,and the reliable indicator is 3.76,which meet the secondary standard specifications.