动剪切模量比对反应谱影响的定量分析
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摘要
动剪切模量比的不确定性会对场地地震反应计算的结果产生较大的影响,而目前对这种影响的研究多限于定性分析,笔者利用渤海海域典型场地对这一影响进行定量分析。首先,建立了土层地震反应计算模型;然后,在不改变影响土层地震反应计算结果其他参量的前提下,赋予了原动剪切模量比一系列偏差并求得了场地反应谱的变化;最后,得到了反应谱对动剪切模量比的敏感度。结果表明:1)在动剪切模量比曲线增大(或减小)后,在基准反应谱的特征周期附近,存在一个反应谱相对于基准反应谱由增大转变为减小(或由减小转变为增大)的转变点。2)在概率水准2和3下:反应谱平台段对动剪切模量比的敏感度最高,其值基本上分布在1.0~3.0;反应谱下降段的敏感度绝对值随着周期的增大先迅速增大后逐渐趋于0,最大值达1.0以上;反应谱上升段的敏感度分布平稳,其值多分布在1.0~2.0。
The uncertainty of dynamic shear modulus ratio has a large impact on the site seismic response analysis results.Most studies on the influence are qualitative at present.The authors try to quantitatively study the influence on the engeering sites in Bohai Sea.Firstly,The authors builted the site seismic response calculation models;secondly,by adding a series of deviations to the original dynamic shear modulus ratio with maintaining other parameters unchanged,the anthors calculated the change of response spectra,and then got the sensitivity values of response spectra on the dynamic shear modulus ratio.According to the research,the conclusion is drown as below:1)With the dynamic shear modulus ratio curves going up and down,a turning point appears near the characteristic period of the datum response spectrum;2)Under probability level 2and 3,the platform segments of the response spectra show the highest sensitivity values which are basically between 1.0and 3.0.The absolutesensitivity values on the decending segment are mostly larger than 1.0,and increase quickly at first;and then decrease slowly to zero with the increase of period;but relatively stable between 1.0to 2.0on the ascending egment with the increase of period.
引文
[1]兰景岩,刘红帅,吕悦军,等.表层土剪切波速的不确定性对地表设计谱平台值的影响[J].吉林大学学报:地球科学版,2012,42(3):772-778.Lan Jingyan,Liu Hongshuai,LüYuejun,et al.Effects of Uncertainties of Shear Wave Velocity of Soil Surface Layer on Platform Value of Surface Design Response Spectra[J].Journal of Jilin University:Earth Science Edition,2012,42(3):772-778.
    [2]吕悦军,唐荣余,沙海军.渤海海底土类动剪切模量比和阻尼比试验研究[J].防灾减灾工程学报,2003,23(2):35-42.LüYuejun,Tang Rongyu,Sha Haijun.Experimental Study on Dynamic Shear Modulus Ratio and Damping Ratio of the Soils of Bohai Seafloor[J].Journal of Disaster Prevention and Mitigation Engineering,2003,23(2):35-42.
    [3]荣棉水,李红光,李小军,等.Davidenkov模型对海域软土的适用性研究[J].岩土工程学报,2013,35(增刊2):596-600.Rong Mianshui,Li Hongguang,Li Xiaojun,et al.Applicability of Davidenkov Model for Soft Soils in Sea Areas[J].Chinese Journal of Geotechnical Engineering,2013,35(Sup.2):596-600.
    [4]荣棉水,李小军,卢滔,等.对含厚软表层海域工程场地设计地震动参数的一点建议[J].地震学报,2013,35(2):262-271.Rong Mianshui,Li Xiaojun,Lu Tao,et al.Suggestion on Determination of Design Ground Motion Parameters for Offshore Engineering Sites with Deep Soft Suface Layers[J].Acta Seismologica Sinica,2013,35(2):262-271.
    [5]荣棉水,卢滔,李小军,等.一种基于动态骨架曲线的土层时域积分方法及其验证[J].应用基础与工程科学学报,2013,21(1):78-89.Rong Mianshui,Lu Tao,Li Xiaojun et al.A Direct Time-Domain Integral Method Based on Dynamic Skeleton Curve Constitutive Model and Its Verification[J].Journal of Basic Science and Engineering,2013,21(1):78-89.
    [6]孙锐,陈红娟,袁晓铭.土的非线性动剪切模量比和阻尼比不确定性分析[J].岩土工程学报,2010,32(8):1228-1235.Sun Rui,Chen Hongjuan,Yuan Xiaoming.Uncertainty of Non-Linear Dynamic Shear Modular Ratio and Damping Ratio of Soils[J].Chinese Journal of Geotechnical Engineering,2010,32(8):1228-1235.
    [7]朱国祥.土层地震反应分析中不同参数的敏感性分析[J].工程抗震,2004,100(3):27-32.Zhu Guoxiang.Sensitivity of Different Parameters Applied in Seismic Analysis of Multi-Layer Soil Models[J].Earthquake Resistant Engineering,2004,100(3):27-32.
    [8]刘红帅,薄景山,吴兆营,等.土体参数对地表加速度峰值和反应谱的影响[J].地震研究,2005,28(2):167-171.Liu Hongshuai,Bo Jingshan,Wu Zhaoying,et al.Effects of Soil Parameters on Ground Surface Acceleration Peak and Response Spectra[J].Journal of Seismological Research,2005,28(2):167-171.
    [9]陈国兴,刘雪珠,王炳辉.土动力参数变异性对深软场地地表地震动参数的影响[J].防灾减灾工程学报,2007,27(1):1-10.Chen Guoxing,Liu Xuezhu,Wang Binghui.Effect of Variability of Soil Dynamic Parameters on Ground Motion Parameters for Deep Soft Sites[J].Journal of Disaster Prevention and Mitigation Engineering,2007,27(1):1-10.
    [10]陈红娟,孙锐,袁晓铭,等.不同概率水准下黏土动剪切模量比对地震动的影响[C]//第八届全国地震工程学术会议论文集:Ⅰ.重庆:重庆大学,2010:114-116.Chen Hongjuan,Sun Rui,Yuan Xiaoming,et al.Effects of Clay’s Dynamic Shear Modulus Ratio on Ground Motion Under Different Probability Level[C]//8th National Earthquake Engineering Conference Proceedings:I.Chongqing:Chongqing University,2010:114-116.
    [11]孙锐,袁晓铭,刘晓键.动剪切模量比与剪切波速对地震动影响及等量关系研究[J].岩土工程学报,2009,31(8):1267-1274.Sun Rui,Yuan Xiaoming,Liu Xiaojian.Effects of Dynamic Shear Modulus Ratio and Velocity on Surface Ground Motion and Their Equivalent Relations[J].Chinese Journal of Geotechnical Engineering,2009,31(8):1267-1274.
    [12]王蛟,姜在兴,陈世悦.渤海湾盆地车镇凹陷古近系层序地层与隐蔽油气藏[J].吉林大学学报:地球科学版,2005,35(2):163-169.Wang Jiao,Jiang Zaixing,Chen Shiyue.Sequence Stratigraphy and Subtle Hydrocarbon Reservoir of Paleogene in Chezhen Sag,Bohai Bay Basin[J].Journal of Jilin University:Earth Science Edition,2005,35(2):163-169.
    [13]张莉,朱筱敏,钟大康,等.惠民凹陷古近系砂岩储层物性控制因素评价[J].吉林大学学报:地球科学版,2007,37(1):105-111.Zhang Li,Zhu Xiaomin,Zhong Dakang,et al.Evaluation on Controlling Factors of Paleogene Sandstone Reservoir in Huimin Sag[J].Journal of Jilin University:Earth Science Edition,2007,37(1):105-111.
    [14]黄传炎,王华,吴永平,等.歧口凹陷第三系层序格架下的油气藏富集规律[J].吉林大学学报:地球科学版,2010,40(5):986-995.Huang Chuanyan,Wang Hua,Wu Yongping,et al.Analysis of the Hydrocarbon Enrichment Regularity in the Sequence Stratigraphic Framework of Tertiary in Qikou Sag[J].Journal of Jilin University:Earth Science Edition,2010,40(5):986-995.
    [15]廖振鹏,李小军.地表土层地震反应的等效线性化解法[M]//地震小区划:理论与实践.北京:地震出版社,1989:141-151.Liao Zhenpeng,Li Xiaojun.Equivalent Linear Method for Solving Surface Soil Seismic Response Problem[M]//Seismic Microzonation:Theory and Practice.Beijing:Seismological Press,1989:141-151.
    [16]章光,朱维申.参数敏感性分析与试验方案优化[J].岩土力学,1993,14(1):51-57.Zhang Guang,Zhu Weishen.Parameter Sensitivity Analysis and Optimizing for Test Programs[J].Rock and Soil Mechanics,1993,14(1):51-57.
    [17]廖振鹏,李大华.设计地震反应谱的双参数标定模型[M]//地震小区划:理论与实践.北京:地震出版社,1989:196-206.Liao Zhenpeng,Li Dahua.Two-Parameter Calibration Model for Seismic Response Spectrum[M]//Seismic Microzonation:Theory and Practice.Beijing:Seismological Press,1989:196-206.

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