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  任凤文,王晓军,张晗亮,聂大巍.航空工业组团阎良片区土动力学参数统计分析[J].震灾防御技术,2020,15(1):43-55, DOI:10.11899/zzfy20200105.

航空工业组团阎良片区土动力学参数统计分析
摘要:    基于航空工业组团阎良片区地震小区划项目中大量动三轴试验结果,通过双曲线拟合方法,得到主要土类(黄土状土、粉质粘土、粉土、细砂)在8个典型剪应变(0.000005、0.00001、0.00005、0.0001、0.0005、0.001、0.005、0.01)下的动剪切模量比和阻尼比统计值,并将得到的统计值与廖振鹏给出的建议值、陈党民等给出的典型值和袁晓铭等给出的推荐值进行比较,进一步论证土动力学参数的地域性特征。文中还探讨了土样埋深和取样手段(试样等级)对动剪切模量比和阻尼比的影响。文中给出的统计值可为该片区地震小区划中的土层地震反应模型提供参数,同时也为研究该片区场地土动力特性及重大工程地震安全性评价工作提供参考和借鉴。
作者单位
任凤文 陕西省地震局, 西安 710068 
王晓军 陕西省地震局, 西安 710068 
张晗亮 陕西省地震局, 西安 710068 
聂大巍 陕西省地震局, 西安 710068 
关  键  词:航空工业组团阎良片区  动三轴  剪应变  动剪切模量比  阻尼比  试样等级  统计值
DOI:10.11899/zzfy20200105
基金项目:陕西省防震减灾“十三五”重点项目《富平县地震小区划》资助
收稿日期:2019-06-17
作者简介:任凤文,女,生于1987年。工程师。主要研究领域为工程地震和地震地质。E-mail:542637798@qq.com
通讯作者:王晓军,男,生于1965年。高级工程师。主要研究领域为工程地震和震害预测。E-mail:1139543416@qq.com
Statistical Analysis of Dynamic Parameters in Yanliang Area of Aviation Industry Group
Abstract:      Based on a large number of dynamic triaxial test results of the seismic microzoning project in Yanliang area of aviation industry group, statistical values of dynamic shear modulus ratio and damping ratio of the main soil types such as loessial soil, silty clay, silt and fine sand,under eight typical shear strains, such as 0.000005, 0.00001, 0. 00005, 0.0001, 0.0005, 0.001, 0.005 and 0.01, were obtained through hyperbolic fitting. This paper compared the statistical values with the suggested values proposed by Liao Zhenpeng, the typical values proposed by Chen Dangmin, etc. and the recommended values proposed by Yuan Xiaoming, etc., so as to further demonstrate the regional characteristics of soil dynamic parameters. The effects of soil sample depth and sampling method (sample level) on dynamic shear modulus ratio and damping ratio were discussed. The statistical values can provide parameters for the seismic response model of the soil layer in the seismic microzoning, and have reference significance for the study of the soil dynamic characteristics of the area and the seismic safety evaluation of major projects.
Keywords:  Yanliang area of aviation industry group  Dynamic triaxial  Shear strain  Dynamic shear modulus ratio  Damping ratio  Sample level  Statistics
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