某沉管隧道场地土地震响应研究
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摘要
采用一维剪切波理论分析了广州洲头咀隧道场地土水平地震波作用下的响应.计算结果表明:①洲头咀隧道场地土在不同超越概率的基岩加速度作用下的地震响应放大系数基本相同;②土表加速度响应谱的卓越周期比基岩加速度的卓越周期稍有左移,但幅度很小;③不同钻孔土体对于同一基岩加速度的地震响应放大系数差异较大,因此对于土层构造变化较大的场地,应适当增加钻孔密度.
Seismic responses of site soil in Guangzhou Zhoutouzui immersed tunnel are calculated based on one-dimension shear wave theory.The results show that: ①the amplifying factors of seismic response of site soil in Guangzhou Zhoutouzui immersed tunnel are almost the same under the excitation from bed rock accelerations with different exceeding probability;②the predominant period of the ground acceleration response spectrum is a little smaller than that of the bed rock acceleration response spectrum,however the amplitude is very small;③the amplifying factors of seismic response of the same bed rock acceleration are very different to the site soil with different drilling hole ratios,therefore,it is necessary to keep increasing the drilling hole ratio for the site soil with complex soil-layer structure.
Seismic responses of site soil in Guangzhou Zhoutouzui immersed tunnel are calculated based on one-dimension shear wave theory.The results show that: ①the amplifying factors of seismic response of site soil in Guangzhou Zhoutouzui immersed tunnel are almost the same under the excitation from bed rock accelerations with different exceeding probability;②the predominant period of the ground acceleration response spectrum is a little smaller than that of the bed rock acceleration response spectrum,however the amplitude is very small;③the amplifying factors of seismic response of the same bed rock acceleration are very different to the site soil with different drilling hole ratios,therefore,it is necessary to keep increasing the drilling hole ratio for the site soil with complex soil-layer structure.
引文
[1]TSANG H H,CHANDLER A M.Simple models for estimating period-shift and damping in soil[J].Earthquake Eng StrDynamics.2006(35):1 925-1 747.
[2]王钟琦.地震工程导论[M].北京:地震出版社,1983.WANG Zhong-qi.Introduction of earthquake engineering[M].Beijing:Earthquake Press,1983.
[3]HEIDERBRECHTA C,HENDERSON P,NAUMOSKI N,et al.Seismic response and design for structures located on softclay sites[J].Can Geotech J,1990(27):330-341.
[4]彭艳菊,唐荣余,吕悦军,等.天津滨海场地土类别特征及其对地震动的影响[J].地震工程与工程振动.2004,20(2):46-52PENG Yan-ju,TANG Rong-yu,LUYue-jun,et al.Tianjin seashore site classification and its effect on ground motion[J].Earthquake Eng Eng Vib,2004,20(2):46-52.
[5]陈继华,贾学民,王伟.软弱夹层土对软土场地地震效应的影响[J].燕山大学学报,2006,30(5):451-455.CHEN Ji-hua,JIA Xue-ming,WANG Wei.Soft interlayer on effects of earthquake response for soft site[J].J YanshanUniv,2006,30(5):451-455.
[6]TAMURAC,OKAMOTO S.On earthquake resistant of a submerged tunnel[C]∥Proc of International Symposium on Earth-quake Structure Engineering.St Louis:Univ Missouri Rolla,1976.
[2]王钟琦.地震工程导论[M].北京:地震出版社,1983.WANG Zhong-qi.Introduction of earthquake engineering[M].Beijing:Earthquake Press,1983.
[3]HEIDERBRECHTA C,HENDERSON P,NAUMOSKI N,et al.Seismic response and design for structures located on softclay sites[J].Can Geotech J,1990(27):330-341.
[4]彭艳菊,唐荣余,吕悦军,等.天津滨海场地土类别特征及其对地震动的影响[J].地震工程与工程振动.2004,20(2):46-52PENG Yan-ju,TANG Rong-yu,LUYue-jun,et al.Tianjin seashore site classification and its effect on ground motion[J].Earthquake Eng Eng Vib,2004,20(2):46-52.
[5]陈继华,贾学民,王伟.软弱夹层土对软土场地地震效应的影响[J].燕山大学学报,2006,30(5):451-455.CHEN Ji-hua,JIA Xue-ming,WANG Wei.Soft interlayer on effects of earthquake response for soft site[J].J YanshanUniv,2006,30(5):451-455.
[6]TAMURAC,OKAMOTO S.On earthquake resistant of a submerged tunnel[C]∥Proc of International Symposium on Earth-quake Structure Engineering.St Louis:Univ Missouri Rolla,1976.
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