考虑埋置效应对地震输入的修正方法
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摘要
结合某核电站泵房半埋置式结构特点,分别分析使用经验公式法和数值分析法计算地震输入的局限性,指出直接采用基岩地表的地震动输入计算半埋置结构往往过大.为此提出一种考虑半埋置效应的地震输入的修正方法.该方法需要已知人工边界处土体节点地震位移和速度,然后通过对地震加速度时程进行积分,得到底层深度处土体速度和位移时程曲线.
Considering the actual structural design of a nuclear power's plant pump house,the semi-embeded characteristics and their limitations resulting from empirical formula method and numerical analysis method are respectively studied.The paper points out that the seismic inputs of bedrock surface which directly adopted to calculate the half buried structure are often too large.Therefore,a correction method of earthquake input for the semi-embeded structures is presented.The seismic's displacement and velocity of the artificial border soil node need to be known for this method.The velocity and displacement time course curves of the depth underlying soil are obtained by integrating seismic acceleration time.
Considering the actual structural design of a nuclear power's plant pump house,the semi-embeded characteristics and their limitations resulting from empirical formula method and numerical analysis method are respectively studied.The paper points out that the seismic inputs of bedrock surface which directly adopted to calculate the half buried structure are often too large.Therefore,a correction method of earthquake input for the semi-embeded structures is presented.The seismic's displacement and velocity of the artificial border soil node need to be known for this method.The velocity and displacement time course curves of the depth underlying soil are obtained by integrating seismic acceleration time.
引文
[1]廖振鹏.工程波动理论导论[M].北京:科学出版社,2002.LIAO Zhen-peng.Introduction to engineering wave theory[M].Beijing:Science Press,2002.(in Chinese)
[2]St JOHN C M,ZAHRAH T F.A seismic design of under-ground structures[J].Tunnelling and Underground SpaceTechnology,1987,2:165-197.
[3]郑永来.地下结构抗震[M].上海:同济大学出版社,2005.ZHENG Yong-lai.An-seismic of underground structure[M].Shanghai:Tongji University Press,2005.(in Chi-nese)
[4]MADDALONI1 G,MAGLIULO G,COSENZA E.Effect ofthe seismic input on non-linear response of R/C buildingstructures[J].Adv Struct Eng,2012(10):1861-1877.
[5]TOMASSOLI E,MEZZI M.Energy-based criterion for theselection of the seismic input for inelastic dynamic analyses[C]//9th US National and 10th Canadian Conference onEarthquake Engineering,2010(7):2338-2347.
[6]FU J,KEN J.Seismic performance evaluation of existingR/C asymmetric buildings considering the direction of seis-mic input[J].Journal of Structural and Construction Engi-neering,2012(4):565-574.
[7]MA H,LIU C Y,LI Z B,et al.The influence of seismicinput in the oblique direction on the strong-column weak-beam mechanism for RC frame[J].Adv Mater Res,2011(6):5144-5155.
[8]CILINGIR U.A model study on the effects of input motionon the seismic behaviour of tunnels[J].Soil Dyn EarthquEng,2011(3):452-462.
[9]DEEKS A J,RANDOLPH M F.Axisymmetric time-domaintransmitting boundaries[J].Journal of Engineering Mechan-ics,ASCE,1994,120(1):25-42.
[10]胡聿贤,张裕明.中华人民共和国国家标准——工程场地地震安全性评价(GB 1774-2005)[S].北京:中国国家标准化管理委员会,2005.HU Yu-xian,ZHANG Yu-ming.National standards of thePeople’s Republic of China-seismic safety evaluation ofengineering site(GB 17741-2005)[S].Beijing:ChinaNational Standardization Management Committee,2005.(in Chinese)
[2]St JOHN C M,ZAHRAH T F.A seismic design of under-ground structures[J].Tunnelling and Underground SpaceTechnology,1987,2:165-197.
[3]郑永来.地下结构抗震[M].上海:同济大学出版社,2005.ZHENG Yong-lai.An-seismic of underground structure[M].Shanghai:Tongji University Press,2005.(in Chi-nese)
[4]MADDALONI1 G,MAGLIULO G,COSENZA E.Effect ofthe seismic input on non-linear response of R/C buildingstructures[J].Adv Struct Eng,2012(10):1861-1877.
[5]TOMASSOLI E,MEZZI M.Energy-based criterion for theselection of the seismic input for inelastic dynamic analyses[C]//9th US National and 10th Canadian Conference onEarthquake Engineering,2010(7):2338-2347.
[6]FU J,KEN J.Seismic performance evaluation of existingR/C asymmetric buildings considering the direction of seis-mic input[J].Journal of Structural and Construction Engi-neering,2012(4):565-574.
[7]MA H,LIU C Y,LI Z B,et al.The influence of seismicinput in the oblique direction on the strong-column weak-beam mechanism for RC frame[J].Adv Mater Res,2011(6):5144-5155.
[8]CILINGIR U.A model study on the effects of input motionon the seismic behaviour of tunnels[J].Soil Dyn EarthquEng,2011(3):452-462.
[9]DEEKS A J,RANDOLPH M F.Axisymmetric time-domaintransmitting boundaries[J].Journal of Engineering Mechan-ics,ASCE,1994,120(1):25-42.
[10]胡聿贤,张裕明.中华人民共和国国家标准——工程场地地震安全性评价(GB 1774-2005)[S].北京:中国国家标准化管理委员会,2005.HU Yu-xian,ZHANG Yu-ming.National standards of thePeople’s Republic of China-seismic safety evaluation ofengineering site(GB 17741-2005)[S].Beijing:ChinaNational Standardization Management Committee,2005.(in Chinese)
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