针对API RP 2A-WSD 22版规范更新将对固定式海洋平台带来设计变化的问题,采用与旧版规范对比的方法对API新规范的引用标准、暴露分级及设计标准和方法等方面进行分析,包括底甲板高度算法、鲁棒性分析和抗震能力储备系数等重要变化。以...针对API RP 2A-WSD 22版规范更新将对固定式海洋平台带来设计变化的问题,采用与旧版规范对比的方法对API新规范的引用标准、暴露分级及设计标准和方法等方面进行分析,包括底甲板高度算法、鲁棒性分析和抗震能力储备系数等重要变化。以实际项目为算例,基于Pushover法计算平台的结构极限强度状态,分析表明,根据新版规范设计海洋平台,可以显著提高平台遭受极端工况的生存能力。展开更多
API code is introduced at first, and then a comparison of seismic character and seismic hazard between Bohai and Southern California is carried out. The analysis indicates both the seismic frequency and intensity and ...API code is introduced at first, and then a comparison of seismic character and seismic hazard between Bohai and Southern California is carried out. The analysis indicates both the seismic frequency and intensity and the seismic hazard of Bohai are much weaker than that of Southern California. API code states the strength level and deformation level of permanent structures in Southern California takes 200 a and several hundred to a few thousand years respectively. But in the reference codes in China, the seismic levels take 500 a and 10000 a for strength design and deformation design, and it seems too conservative. In China, the deformation level of class A structure takes 2%-3% probabilities of exceedance in reference period 100 a, and that of class B and C often takes 2%-3% in 50 a. Now that offshore platforms may cause server subsequent risk, it is safe to take 1% in 30 a as its deformation design level. On the basis of the above analyses and social economic level and the consistency with present codes, the strength design level and deformation design level of Chinese offshore platforms is suggested to take 200 a and 3000 a respectively.展开更多
文摘针对API RP 2A-WSD 22版规范更新将对固定式海洋平台带来设计变化的问题,采用与旧版规范对比的方法对API新规范的引用标准、暴露分级及设计标准和方法等方面进行分析,包括底甲板高度算法、鲁棒性分析和抗震能力储备系数等重要变化。以实际项目为算例,基于Pushover法计算平台的结构极限强度状态,分析表明,根据新版规范设计海洋平台,可以显著提高平台遭受极端工况的生存能力。
基金Important Research of the Tenth Five-year Plan from China Earthquake Administration ″Seismic hazard assessment and structure seismic fortification″ and ″Reliability of seismic fortification level of offshore platforms″.
文摘API code is introduced at first, and then a comparison of seismic character and seismic hazard between Bohai and Southern California is carried out. The analysis indicates both the seismic frequency and intensity and the seismic hazard of Bohai are much weaker than that of Southern California. API code states the strength level and deformation level of permanent structures in Southern California takes 200 a and several hundred to a few thousand years respectively. But in the reference codes in China, the seismic levels take 500 a and 10000 a for strength design and deformation design, and it seems too conservative. In China, the deformation level of class A structure takes 2%-3% probabilities of exceedance in reference period 100 a, and that of class B and C often takes 2%-3% in 50 a. Now that offshore platforms may cause server subsequent risk, it is safe to take 1% in 30 a as its deformation design level. On the basis of the above analyses and social economic level and the consistency with present codes, the strength design level and deformation design level of Chinese offshore platforms is suggested to take 200 a and 3000 a respectively.
