输入界面对地表加速度峰值的影响
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摘要
为了研究输入界面对地表加速度峰值(Amax)的影响,在研究我国数百个工程场地钻孔资料的基础上,选取和构造了若干有代表性的场地剖面,利用目前工程上广泛应用的场地地震反应分析的一维等效线性化波动方法,计算了4类场地在6种不同强度的地震动输入下的Amax。分析了每类场地的输入界面的改变对Amax的影响,研究结果表明:一般强度(10 Gal、50 Gal和120 Gal)的地震动输入时,Amax随输入界面的改变而变化较小;大强度(250 Gal、300 Gal和400 Gal)地震动输入时,Ⅱ、Ⅲ类场地的Amax随输入界面的改变而变化较大,Ⅰ、Ⅳ类场地的Amax随输入界面的改变而变化较小。
In order to study the effect of the inputting interface of earthquake ground motion on the ground peak acceleration(Amax),based on hundreds of actual engineering site profiles,several significant site profiles are selected and built.Amax of four types of sites are calculated and analyzed in detail under six earthquake inputs with different intensities by using the equivalent linearization and wave propagation method for the earthquake response analysis of soil layers.The effect of different inputting interfaces of earthquake ground motion on Amax is analyzed.The result show that when the earthquake inputs are general(the peak is 10 Gal,50 Gal or 120 Gal),Amax changes little with the change of the inputting interface of earthquake ground motion;when the earthquake inputs are great(the peak is 250 Gal,300 Gal or 400 Gal),Amax for the sites of the second type and the third type change significantly with the change of the inputting interface of earthquake ground motion,while the ground peak accelerations for the sites of the first type and the fourth type change little.
In order to study the effect of the inputting interface of earthquake ground motion on the ground peak acceleration(Amax),based on hundreds of actual engineering site profiles,several significant site profiles are selected and built.Amax of four types of sites are calculated and analyzed in detail under six earthquake inputs with different intensities by using the equivalent linearization and wave propagation method for the earthquake response analysis of soil layers.The effect of different inputting interfaces of earthquake ground motion on Amax is analyzed.The result show that when the earthquake inputs are general(the peak is 10 Gal,50 Gal or 120 Gal),Amax changes little with the change of the inputting interface of earthquake ground motion;when the earthquake inputs are great(the peak is 250 Gal,300 Gal or 400 Gal),Amax for the sites of the second type and the third type change significantly with the change of the inputting interface of earthquake ground motion,while the ground peak accelerations for the sites of the first type and the fourth type change little.
引文
[1]韦晓.土层反应分析中输入界面的选取[D].哈尔滨:中国地震局工程力学研究所,1991.
[2]陈国兴,陈继华.地震动输入界面的选取对深软场地地震效应的影响[J].世界地震工程,2005,21(2):36-43.
[3]潘旦光,楼梦麟.基岩弹性刚度对土层地震反应的影响[J].地震工程与工程振动,2004,24(4),158-163.
[4]Idriss I M.Response of soft soil sites during earthquake[C]//Proceeding of a memorial Symposium to honor Professor Seed H.B.University of Cal-ifornia,Berkeley,1990.
[5]廖振鹏,李小军.地震小区划—理论与实践[M].北京:地震出版社,1989:141-153.
[6]袁晓铭,孙锐,孙静,等.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.
[7]石兆吉.地震小区划—理论与实践[M].北京:地震出版社,1989:134-140.
[8]陈国兴.岩土地震工程学[M].北京:科学出版社,2007.151-167.
[9]王绍博,丁海平.土动力学参数对土层动力反应的影响[J].地震工程与工程振动,2001,21(1):105-108.
[10]孙静,袁晓铭,孙锐,等.土动剪切模量和阻尼比的推荐值和规范值的合理性比较[J].地震工程与工程振动,2004,24(2):125-133.
[2]陈国兴,陈继华.地震动输入界面的选取对深软场地地震效应的影响[J].世界地震工程,2005,21(2):36-43.
[3]潘旦光,楼梦麟.基岩弹性刚度对土层地震反应的影响[J].地震工程与工程振动,2004,24(4),158-163.
[4]Idriss I M.Response of soft soil sites during earthquake[C]//Proceeding of a memorial Symposium to honor Professor Seed H.B.University of Cal-ifornia,Berkeley,1990.
[5]廖振鹏,李小军.地震小区划—理论与实践[M].北京:地震出版社,1989:141-153.
[6]袁晓铭,孙锐,孙静,等.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.
[7]石兆吉.地震小区划—理论与实践[M].北京:地震出版社,1989:134-140.
[8]陈国兴.岩土地震工程学[M].北京:科学出版社,2007.151-167.
[9]王绍博,丁海平.土动力学参数对土层动力反应的影响[J].地震工程与工程振动,2001,21(1):105-108.
[10]孙静,袁晓铭,孙锐,等.土动剪切模量和阻尼比的推荐值和规范值的合理性比较[J].地震工程与工程振动,2004,24(2):125-133.
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