厚软覆盖层场地地震反应分析方法研究
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摘要
遭遇地震动作用时,厚软覆盖层场地由于其剪切模量低,极易产生较大的剪应变,采用等效线性化方法进行土层反应分析计算得到的响应高频成分被低估,峰值加速度偏低,对于工程抗震设防偏于不安全。本文给出了基于移动平均线和Parzen谱窗的频率相关等效线性化方法,并和有实际强震记录的厚软场地进行了对比分析,结果表明本文方法比等效线性化方法能更有效地模拟地震波在厚软覆盖层场地中的传播规律。最后采用本文方法和等效线性化方法对天津滨海新区某一典型厚软场地进行了地震反应计算,并对计算结果进行了对比分析。
When subjected to earthquake motions,the deep soft soil easily undergoes large deform due to its low shear modulus. The equivalent linear method is traditionally used to perform site response. For deep soft deposit site,the high frequency composites and peak acceleration values of the site response are underestimated if the equivalent linear method is used. It is dangerous for the structure if the site response is used to perform anti-seismic design. The frequency-dependent equivalent linear method is proposed in this paper. It considers the moving average and Parzen spectrum window theory. Results of the two methods are compared with the observed earthquake motions. This comparison shows that the method proposed in this paper is more effective than the traditional method in simulating wave propagation in the deep soft site. Finally,the two methods are used to perform the site reponse for one engineering site located at Binhai New District. The results are analyzed.
引文
[1]陈国兴,杨伟林,严新育,等.南京河西地区设计地震动研究[J].地震工程与工程振动,1999,19(3):17~25.Chen Guoxing,Yang Weilin,Yan Xinyu,et al.A study of design ground motion parameters in Hexi area of Nanjing City[J].Earthquake Engineering and Engineering Vibration,1999,19(3):17~25.
    [2]杨伟林,陈国兴,严新育,等.软土地基深开挖对场地设计地震动的影响[J].地震工程与工程振动,2000,20(3):93~99.Yang Weilin,Chen Guoxing,Yan Xinyu,et al.Study of influence of deep level excavation on design ground motion parameters in a weak foundation site[J].Earthquake Engineering and Engineering Vibration,2000,20(3):93~99.
    [3]戚承志,钱七虎.核电站抗震研究综述[J].地震工程与工程振动,2000,20(3):76~86.Qi Chengzhi,Qian Qihu.Overview of seismic research for nuclear power plant[J].Earthquake Engineering and Engineering Vibration,2000,20(3):76~86.
    [4]李小军,彭青.不同类别场地地震动参数的计算分析[J].地震工程与工程振动,2001,21(1):29~36.Li Xiaojun,Peng Qing.Calculation and analysis of earthquake ground motion parameters for different site categories[J].Earthquake Engineering and Engineering Vibration,2001,21(1):29~36.
    [5]刘峥,徐永林,王绍博,等.用强震记录检验深厚土层小应变下一维等效线性化土层地震反应[J].震灾防御技术,2011,6(4):372~383.Liu Zheng,Xu Yonglin,Wang Shaobo,et al.Research on one dimensional equivalent linear seismic response of deep soil based on the strong motion record at small strain[J].Technology for Earthquake Disaster Prevention,2011,6(4):372~383.
    [6]丁海平,任琼洁,于彦彦.基于竖向台阵地震记录的场地地震响应分析[J].地震工程与工程振动,2014,34(2):12~18.Ding Haiping,Ren Qiongjie,Yu Yanyan.Site seismic response analysis based on vertical borehole array records[J].Earthquake Engineering and Engineering Vibration,2014,34(2):12~18.
    [7]Sugito M.Frequency-dependent equivalent strain for earthquake response analysis of soft ground[C].In:The First International Conference on Earthquake Geotechnical Engineering.Tokyo,1995,655~660.
    [8]Assimaki D,Kausel E.An equivalent linear algorithm with frequency and pressure-dependent moduli and damping for the seismic analysis of deep sites[J].Soil Dynamics and Earthquake Engineering,2002,22(9—12):959~965.
    [9]Kausel E,Assimaki D.Seismic simulation of inelastic soils via frequency-dependent moduli and damping[J].Journal of Engineering Mechanics,2002,128(1):34~47.
    [10]Yoshida N,Kobayashi S,Suetomi I.Equivalent linear method considering frequency dependent characteristics of stiffness and damping[J].Soil Dynamics and Earthquake Engineering,2002,22(3):205~222.
    [11]蒋通,邢海灵.水平土层地震反应分析考虑频率相关性的等效线性化方法[J].岩土工程学报,2007,29(2):218~224.Jing Tong,Xing Hailing.An equivalent linear method considering frequency-dependent soil properties for seismic response analysis[J].Chinese Journal of Geotechnical Engineering,2007,29(2):218~224.
    [12]王伟,刘必灯,周正华,等.刚度和阻尼频率相关的等效线性化方法[J].岩土力学,2010,31(12):3928~3933.Wang Wei,Liu Bideng,Zhou Zhenghua,et al.Equivalent linear method considering frequency dependent stiffness and damping[J].Rock and Soil Mechanics,2010,31(12):3928~3933.
    [13]Ohsaki Y.New introduction of sprctrum analysis of ground motion[M].Tokyo:Kajima Shuppan,1994.
    [14]http:∥peer.berkeley.edu/peer_ground_motion_database.
    [15]尤红兵,赵凤新,荣棉水.地震波斜入射时水平层状场地的非线性地震反应[J].岩土工程学报,2009,31(2):234~240.You Hongbing,Zhao Fengxin,Rong Mianshui.Nonlinear seismic response of horizontal layered site due to inclined wave[J].Chinese Journal of Geotechnical Engineering,2009,31(2):234~240.
    [16]廖振鹏.地震小区划理论与实践[M].北京:地震出版社,1989.Liao Zhenpeng.Earthquake zonation theory and application[M].Beijing:Seismological Press,1989.
    [17]中国地震灾害防御中心.中俄东方石化(天津)有限公司1300t/年炼油工程场地地震安全性评价报告[Z].北京,2011.China Earthquake Disaster Prevention Centre.Seismic hazard analysis for petroleum refining engineering with productivity of1300 tons annually owned by China-Russia Orient Petroleum(Tianjin)Company Limited[Z].Beijing,2001.

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