ISO 19901-2:2004 石油和天然气工业 离岸海面建筑特殊要求 第2部分：抗地震设计程序和标准

标准编号：ISO 19901-2:2004

中文名称：石油和天然气工业 离岸海面建筑特殊要求 第2部分：抗地震设计程序和标准

英文名称：Petroleum and natural gas industries — Specific requirements for offshore structures — Part 2: Seismic design procedures and criteria

发布日期：2004-11

标准范围

ISO 19901-2:2004包含定义海上结构物抗震设计程序和标准的要求；包括有关要求的指导。本要求适用于固定式钢结构和固定式混凝土结构。还简要讨论了地震事件对浮式结构物和部分浮式结构物的影响。ISO 19901-2:2004仅在适用要求的范围内涵盖了高架条件下自升式平台的现场特定评估。仅详细讨论了地震引起的地面运动。文中还提到并简要讨论了液化、边坡失稳、断层、海啸、泥火山和冲击波等其他地质诱发灾害。这些要求旨在将人员、环境和资产的风险降至合理可行的最低水平。这一目的是通过使用地震设计程序来实现的，该程序取决于平台的暴露水平和地震事件的预期强度，以及两种情况-水平抗震设计检查，将结构设计为强度和刚度的极限状态（ULS），然后检查异常环境事件或意外极限状态（ALS），以确保其满足储备强度和能量耗散要求。对于高地震区和/或高暴露水平的固定结构，需要进行现场特定的地震危险性评估；对于此类情况，说明了现场特定概率地震危险性分析（PSHA）的程序和要求。然而，不包括对PSHA程序的全面解释。在允许采用简化设计方法的情况下，包括全球海上地图，显示对应于1000年重现期的地面震动强度。在这种情况下，这些地图可与相应的比例系数一起使用，以确定结构设计的适当地震作用。

ISO 19901-2:2004 contains requirements for defining the seismic design procedures and criteria for offshore structures; guidance on the requirements is included. The requirements are applicable to fixed steel structures and fixed concrete structures. The effects of seismic events on floating structures and partially buoyant structures are also briefly discussed. The site-specific assessment of jack-ups in elevated condition is only covered in ISO 19901-2:2004 to the extent that the requirements are applicable.Only earthquake-induced ground motions are addressed in detail. Other geologically-induced hazards such as liquefaction, slope instability, faults, tsunamis, mud volcanoes and shock waves are mentioned and briefly discussed.The requirements are intended to reduce risks to persons, the environment, and assets to the lowest levels that are reasonably practicable. This intent is achieved by using seismic design procedures which are dependent on the platform's exposure level and the expected intensity of seismic events and a two-level seismic design check in which the structure is designed to the ultimate limit state (ULS) for strength and stiffness and then checked to abnormal environmental events or the accidental limit state (ALS) to ensure that it meets reserve strength and energy dissipation requirements.For high seismic areas and/or high exposure level fixed structures, a site-specific seismic hazard assessment is required; for such cases, the procedures and requirements for a site-specific probabilistic seismic hazard analysis (PSHA) are addressed. However, a thorough explanation of PSHA procedures is not included.Where a simplified design approach is allowed, worldwide offshore maps are included that show the intensity of ground shaking corresponding to a return period of 1 000 years. In such cases, these maps may be used with corresponding scale factors to determine appropriate seismic actions for the design of a structure.

标准预览图