砂砾石垫层在水平动力作用下软化响应模型
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摘要
基于水平振动荷载下砂砾石垫层响应的实验研究,指出了砂砾石垫层内部自组织、颗粒移动随之结构软化的响应特性主要具有:局部效应;剪阻效应;时间效应等.用Pois-son过程模拟了砂砾石层内部软化的响应过程,并建立了预测的模型.为砂砾石垫层在经历了若干次多遇地震作用后的工后状况研究和砂砾石垫层隔震研究奠定了基础.
Based on experimental study on response of the gravel cushion under horizontal vibration loads,this article has pointed out the response characteristics,which are caused by the movement and structure softening of the self-organization and particles in gravel cushion,including local effects,shear resistance and time effect,etc.We have simulated the response process of the gravel cushion softening by using Poisson process,and then established the prediction model.This study has laid the foundation for research on status of gravel cushion after a number of multi-earthquakes,and research on isolaed earthquake of the gravel cushion.
Based on experimental study on response of the gravel cushion under horizontal vibration loads,this article has pointed out the response characteristics,which are caused by the movement and structure softening of the self-organization and particles in gravel cushion,including local effects,shear resistance and time effect,etc.We have simulated the response process of the gravel cushion softening by using Poisson process,and then established the prediction model.This study has laid the foundation for research on status of gravel cushion after a number of multi-earthquakes,and research on isolaed earthquake of the gravel cushion.
引文
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[2]Nerone N,Aguirre M A,Calvo A,et al.Instabilities inslowly driven granular packing[J].Physical Review E,2003,67(1):1-29.
[3]Salvati L A,Pestana J M.Small-strain behavior of granu-lar soils.II:seismic response analyses and model evaluation1[J].Journal of Geotechnical and Geoenvironmental Engineering,2006(8):1085-1090.
[4]蒋红英,杨晓强,厉玲玲.水平地震荷载下散体材料结构响应分析[J].四川省建筑科学研究,2010,36(4):101-108.
[5]孙业志,熊正明,周健.黏弹性散体介质中波的传播和耗散[J].南方冶金学院学报,2003,24(1):1-6.
[6]Johnson P A,Jia Xiaoping.Nonlinear dynamics,granu-lar media and dynamic earthquake triggering[J].Letters Na-ture,2005,437(6):871-874.
[7]Pestana J M,Salvati L A.Small-strain behavior of granu-lar soils.I:Model for cemented and uncemented sands andgravels[J].Journal of Geotechnical and Geoenvironmental En-gineering,2006(8):1071-1081
[8]刘嘉焜.应用随机过程[M].北京:科学出版社,2000:41-55
[9]Alonso-Marroquín F,Herrmann H J.Ratcheting of granu-lar materials[J].Physical Review Letters,2004,92(5):1-4.
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