埕岛油田导管架平台抗震安全性能分析与研究
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摘要
为保证超期服役海上采油平台的地震安全,通过对胜利埕岛油田海上平台结构构件、导管架焊缝、桩腿海生物、桩基冲刷、防腐系统、平台标高和倾斜度,以及结构振动特性方面的检测,结合平台建造竣工图纸和海洋工程地质调查资料,建立起平台结构的有限元分析系统模型,按8度地震烈度对平台进行地震反应分析,根据API RP 2A规范进行平台结构强度校核。某平台校核结果表明,平台结构在地震载荷作用下的安全系数较高,可以满足抗震要求。
In order to ensure the aseismatic safety of offshore production platform with overtime service,this paper makes an inspection of the structure components,jacket welding,sea creatures around the platform legs,pile foundation scour,anticorrosion system,platform elevation and gradient as well as the structure libration features.Combining with the platform complete blueprint and geological data of offshore projects,finite element analysis system model for platform structure is established.Seismic response analysis on the platform is carried out according to seismic intensity of 8.0.And based on API RP 2A Criterion,the structure intensity of the platform is checked.And the check results of certain platform indicate that the safety factor of the platform structure is comparatively high under seismic loading,which can meet the aseismatic requirements.
In order to ensure the aseismatic safety of offshore production platform with overtime service,this paper makes an inspection of the structure components,jacket welding,sea creatures around the platform legs,pile foundation scour,anticorrosion system,platform elevation and gradient as well as the structure libration features.Combining with the platform complete blueprint and geological data of offshore projects,finite element analysis system model for platform structure is established.Seismic response analysis on the platform is carried out according to seismic intensity of 8.0.And based on API RP 2A Criterion,the structure intensity of the platform is checked.And the check results of certain platform indicate that the safety factor of the platform structure is comparatively high under seismic loading,which can meet the aseismatic requirements.
引文
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[8]蒋海昆,李永莉,曲延军,等.中国大陆中强地震序列类型的空间分布特征[J].地震学报,2006,28(4):389-398.
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[2]杨冬平,牛更奇,刘灵灵,等.基于ALGOR的海洋平台延寿静力评估[J].中国造船.2011.(10):126-131.
[3]杨冬平,牛更奇,支景波,等.海洋延寿平台随机冰激响应与损伤评估[J].中国安全生产科学技术.2012,(03):114-119.
[4]杨冬平,牛更奇,彭星来,支景波,刘灵灵,蔡宗虎,柳立峰,等.基于ALGOR的近海平台延寿静力评估[C]//中国石油学会近海工程年会论文集.2011:547-551.
[5]吕悦军,彭艳菊,唐荣余.关于海洋平台抗震设防水准的考虑[J].震灾防御技术,2006,1(1):39-46.
[6]王忠畅.固定式平台抗震分析若干问题探讨[J].中国海上油气,2005,17(6):421-423.
[7]吕悦军,彭艳菊,唐荣余,等.我国海洋平台抗震标准若干问题探讨[J].地球物理学进展,2008,23(2):443-449.
[8]蒋海昆,李永莉,曲延军,等.中国大陆中强地震序列类型的空间分布特征[J].地震学报,2006,28(4):389-398.
[9]中国船级社.海上平台状态评定指南[S].北京:人民交通出版社,2005.
[10]中国船级社.浅海固定平台建造与检验规范[S].北京:人民交通出版社,2004.
[11]API.Recommended Practice for Planning,Designing and Constructing Fixed OffshorePlatforms-Working Stress Design,API RP2A[S],2000.
[12]S.S Sunder and J.J.Connor.Sensitivity ofOffshore analysis for steel jacket offshore plat-forms[J].Dynamic Analysis of OffshoreStructures.11-24.
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