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Calibration of the Load and Resistance Factors for Axial Pile Capacity Design

机译：轴力承载力设计的荷载和阻力系数的标定

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To evaluate the required resistance factor for geotechnical foundation design, an approach was developed to evaluate the annual probability of failure and to calibrate the required deterministic safety factors. The paper describes the approach and presents the calibrated load and resistance factors corresponding to an annual probability of failure of 10~(-4) for three jacket structures offshore Norway and the U.K. The results of generic calculations of load and resistance factors are also presented. These compared well with the calibrated load and resistance factors obtained for the three "real-life" jackets. The calibration of the load and resistance factors requires the evaluation of the model uncertainty for each pile design method and the statistics of the uncertain parameters in the analyses. The results show that the annual probability of failure varies significantly with pile design method. The annual probability of failure depended strongly on the uncertainty in the geotechnical calculation model. Suggestions for improvements to the methodology and to the codes are made, including how to define and improve the evaluation of the model uncertainty.
机译：为了评估岩土基础设计所需的阻力系数，开发了一种方法来评估年度失效概率并校准所需的确定性安全系数。本文介绍了该方法，并给出了挪威和英国近海三套夹层结构的年失效概率为10〜（-4）的标定载荷和阻力系数，并给出了载荷和阻力系数的通用计算结果。这些与三个“实际”夹克的校准负载和阻力因子进行了很好的比较。荷载和阻力系数的校准要求评估每种桩设计方法的模型不确定性，并需要对分析中的不确定参数进行统计。结果表明，每年的失败概率随着桩的设计方法而变化很大。每年的失败概率在很大程度上取决于岩土计算模型中的不确定性。提出了改进方法和代码的建议，包括如何定义和改进模型不确定性的评估。

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