基于性能理念的导管架平台阻尼隔震技术及优化
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摘要
基于性能的抗震设计理论,提出了面向海洋平台结构的地震设防水准和性能目标,并阐述了平台结构失效模式及量化判别依据。针对胜利油田CB32A导管架平台的特点,在端帽与平台甲板之间设置阻尼隔震层,利用ANSYS有限元数值分析平台,对该导管架式海洋平台的阻尼隔震体系在设计地震及罕遇地震两种作用下的实际抗震性能水平进行分析,并对目标性能达标情况进行评估和结构优化。研究结果表明,隔震技术是海洋平台一种有效的减振控制手段,该平台能够满足结构的性能目标;对其进行截面优化设计也能在保证结构安全的前提下大幅度减少钢材的用量。
Based on the performance-based anti-seismic design theory,the seismic fortification criteria and structure performance objectives for jacket platform are proposed,structure failure mode of the platform and quantified discrimination are also described.According to the characteristic of CB32A jacket platform of Shengli oil field,a damping isolation system is laid between the jacket cap and the platform deck.Using ANSYS finite element software to analyze actual seismic performances of damping isolation system under two diferent levels earthquakes input force,and situation of the objective performances is also evaluated,the structure is optimized.The result shows that damping isolation system is an effective method for jacket platforms,the performance objectives can be matched well for the system,and steel can be greatly reduced by optimization design with the insurance of the platform safety.
Based on the performance-based anti-seismic design theory,the seismic fortification criteria and structure performance objectives for jacket platform are proposed,structure failure mode of the platform and quantified discrimination are also described.According to the characteristic of CB32A jacket platform of Shengli oil field,a damping isolation system is laid between the jacket cap and the platform deck.Using ANSYS finite element software to analyze actual seismic performances of damping isolation system under two diferent levels earthquakes input force,and situation of the objective performances is also evaluated,the structure is optimized.The result shows that damping isolation system is an effective method for jacket platforms,the performance objectives can be matched well for the system,and steel can be greatly reduced by optimization design with the insurance of the platform safety.
引文
[1]李刚,程耿东.基于性能的结构抗震设计:理论、方法与应用[M].北京:科学出版社,2004.
[2]欧进萍,邹向阳,丁建华等.JZ20-2MUQ平台结构耗能减振模型试验[A].“九五”国家自然科学基金重大项目:大型复杂结构的关键科学问题及设计理论论文集(2001)[C].哈尔滨:哈尔滨工业大学出版社,2002.
[3]郁有升,王燕.海洋平台阻尼隔振减振原理及振动控制效果分析[J].青岛建筑工程学院学报,2005,26(1):34-40.
[4]欧进萍,龙旭等.导管架式海洋平台结构阻尼隔振体系及其减振效果分析[J].地震工程与工程振动,2002,22(3):115-122.
[5]吕悦军,彭艳菊,唐荣余等.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]彭艳菊,吕悦军,唐荣余等.渤海某油田设计地震动参数及抗震设防标准研究[J].地震工程与工程振动,2007,27(4):8-14.
[7]Fragiadakis M,Papadrakakis M.Performance-based optimum seismic design of reinforced concrete structures[J].Earth-quake Engineering and Structural Dynamics,2008,37(6):825-844.
[8]Kurata N,Kobori T,Koshika N.Performance-based design with semi-active structural control technique[J].EarthquakeEngineering and Structural Dynamics,2002,31(2):445-458.
[9]Priestley M J N.Performance based seismic design[R].Proceedings of the 12th World Conference on Earthquake Engi-neering,2000,No.2831.
[2]欧进萍,邹向阳,丁建华等.JZ20-2MUQ平台结构耗能减振模型试验[A].“九五”国家自然科学基金重大项目:大型复杂结构的关键科学问题及设计理论论文集(2001)[C].哈尔滨:哈尔滨工业大学出版社,2002.
[3]郁有升,王燕.海洋平台阻尼隔振减振原理及振动控制效果分析[J].青岛建筑工程学院学报,2005,26(1):34-40.
[4]欧进萍,龙旭等.导管架式海洋平台结构阻尼隔振体系及其减振效果分析[J].地震工程与工程振动,2002,22(3):115-122.
[5]吕悦军,彭艳菊,唐荣余等.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]彭艳菊,吕悦军,唐荣余等.渤海某油田设计地震动参数及抗震设防标准研究[J].地震工程与工程振动,2007,27(4):8-14.
[7]Fragiadakis M,Papadrakakis M.Performance-based optimum seismic design of reinforced concrete structures[J].Earth-quake Engineering and Structural Dynamics,2008,37(6):825-844.
[8]Kurata N,Kobori T,Koshika N.Performance-based design with semi-active structural control technique[J].EarthquakeEngineering and Structural Dynamics,2002,31(2):445-458.
[9]Priestley M J N.Performance based seismic design[R].Proceedings of the 12th World Conference on Earthquake Engi-neering,2000,No.2831.
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