桥梁结构地震响应与土层深度相关性研究
摘要
由于土深在一定程度上影响着地震波的传播方式,并影响着地震波所包括的频谱特性。文章基于基岩设计反应谱来生成7条人工地震波,通过不同土层深度的一维传动后作为桥梁结构的地震输入,来研究土层深度对场地放大系数与位移修正系数的影响,并通过数值分析来研究不同土深情况下的桥梁的非线性位移反应的变化,并与规范值进行了比较,得到了以下结论:对于不同的位移延性水平,位移修正系数计算结果在短周期范围内差别较大,而在长周期范围内,土的深度对位移修正系数产生了一定的影响。场地放大系数会随着土深的增加而改变峰值所对应的周期。随着土深增加,非线性位移反应总体呈增大趋势。
引文
[1]Rodriguez-Marek A,Bray JD,Abahamson NA.An empirical geotechnicalseismic site response procedure.Earthquake Spectra.2001,17:65-87
[2]Pitilakis K,Riga E,Anastasiadis A.Newcode site classification,amplificationfactors and normalized response spectra based on a worldwide ground-motion database.Bull Earthquake Eng.2013,11(4):925-66
[3]Seed,H.B.and Idriss,I.M.[1970]“Soil moduli and damping factors for dynamic response analysis,”Technical Report EERC 70-10,University of California,Berkeley
[4]Vucetic,M.and Dobry,R.[1991]“Effect of soil plasticity on cyclic response,”Journal of Geotechnical Engineering,117(1),89-107
[5]Miranda E.Inelastic displacement ratios for structures on firm sites.J Struct Eng ASCE,2000,126(10)
[6]CJJ 166-2011城市桥梁抗震设计规范[S]
[7]JTG/T B02-01-2008公路桥梁抗震设计细则[S]
[8]Cadet H,Bard P-Y,Duval AM,Bertrand E.Site effect assessment using Ki K-netdata:Part 2-Site amplification prediction equation based on f0and Vsz.Bull Earthquake Eng,2012,10(2):451-89
[2]Pitilakis K,Riga E,Anastasiadis A.Newcode site classification,amplificationfactors and normalized response spectra based on a worldwide ground-motion database.Bull Earthquake Eng.2013,11(4):925-66
[3]Seed,H.B.and Idriss,I.M.[1970]“Soil moduli and damping factors for dynamic response analysis,”Technical Report EERC 70-10,University of California,Berkeley
[4]Vucetic,M.and Dobry,R.[1991]“Effect of soil plasticity on cyclic response,”Journal of Geotechnical Engineering,117(1),89-107
[5]Miranda E.Inelastic displacement ratios for structures on firm sites.J Struct Eng ASCE,2000,126(10)
[6]CJJ 166-2011城市桥梁抗震设计规范[S]
[7]JTG/T B02-01-2008公路桥梁抗震设计细则[S]
[8]Cadet H,Bard P-Y,Duval AM,Bertrand E.Site effect assessment using Ki K-netdata:Part 2-Site amplification prediction equation based on f0and Vsz.Bull Earthquake Eng,2012,10(2):451-89
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