梁板式高桩码头极限承载力概率分布

极限承载力概率分布是结构可靠度计算要解决的主要问题之一。针对在役高桩码头结构安全评估问题,选择结构材料性能参数与几何尺寸参数为随机变量,基于非线性有限元数值模型,采用蒙特卡罗法建立典型梁板式高桩码头极限承载力概率分布模型及统计参数。研究了水平荷载作用下无损结构的极限承载力概率分布及损伤位置、损伤程度和损伤数量对高桩码头极限承载力概率分布及统计参数的影响。结果表明:水平荷载作用下无损结构的极限承载力概率分布为正态分布,损伤位置、损伤程度和损伤数量不影响结构极限承载力的概率分布。在水平荷载作用下计算损伤结构的可靠指标时,可以采用无损结构极限承载力概率分布及统计参数进行计算。

Probability distribution of ultimate bearing capacity of beam-slab high-piled wharf

Probability distribution of ultimate bearing capacity is one of the main problems to calculate the reliability index.For safety assessment of in-service high-piled wharf,material properties and geometric size of the wharf were selected as random variables.Based on nonlinear finite element model,the probability distribution model and statistical parameters of the ultimate bearing capacity of beam-slab high-piled wharf were established using Monte Carlo method.The probability distribution of ultimate bearing capacity of the non-destructive structure was analyzed under horizontal load.The impact of the damage location,extent and quantity on the probability distribution and statistical parameters of ultimate bearing capacity of the damaged structure were considered.The results show that the probability distribution of the ultimate bearing capacity of the non-destructive structure under horizontal load are normal distribution,and the probability distribution of the ultimate bearing capacity is not affected by the damage location,extent and quantity.When reliability index of the damaged structure is calculated under horizontal load,the probability distribution and statistical parameters of ultimate bearing capacity of non-destructive structure can be used.