标准摘要
[中文适用范围]： 本研究旨在使用基于拟议的API/ISO RP 2GEO 第2版草案的土壤模型和最佳估计的土壤剖面，对墨西哥湾（GOM）的三种代表性固定式海上平台（单柱式沉箱、导管架平台和三脚架平台）进行结构分析。研究通过非线性动态推覆分析，评估了新的粘土土体p-y曲线（单调、循环和疲劳荷载）对平台结构响应的影响，并将预测结果与飓风期间或正常海况下实测或观察到的平台性能进行了比较。研究涵盖了SS-Caisson（飓风Andrew受损）、SS-Platform（飓风Ike受损）以及EI-Tripod（ survived飓风 Katrina、Rita 和 Ike，并进行了频率测量）三个案例。 [外文原描述]： Fixed offshore platform pile foundation design and assessment in the Gulf of Mexico (GOM) has been based on API RP 2A (various editions) and API/ISO RP 2GEO 1st Edition. Over the years, post-hurricane observations of the platform performance in the GOM have shown that these standards tend to underestimate soil stiffness and capacity. This underprediction does not necessarily lead to conservative structural design and assessment. For example, fatigue design requires a realistic estimate of structural dynamics and strength design with a clear definition of structural load path and failure mechanism. Research work, consisting of small- and large-scale pile tests, laboratory testing, and numerical analyses, has been carried out for years to understand this conservatism and define best-estimate geotechnical criteria, i.e. best-estimate soil lateral reaction for pile foundation design. These efforts culminated in the proposed draft of API/ISO RP 2GEO 2nd Edition, which systematically re
英文名称Effect of Best-Estimate Geotechnical p-y Curves on Performance of Offshore Structures