| 陕北榆林地区 砂土动剪切模量比和阻尼比的统计研究 |
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| 引用本文： | 任凤文,王晓军,张晗亮,聂大巍.陕北榆林地区 砂土动剪切模量比和阻尼比的统计研究[J].世界地震工程,2021,0(4):231-239. |
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| 作者姓名： | 任凤文 王晓军 张晗亮 聂大巍 |
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| 作者单位： | 陕西省地震局, 西安 710068 |
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| 摘 要： | 陕北榆林地区位于鄂尔多斯地块内部，其沉积地层主要为细砂。基于该地区大量的工程场地地震安全性评价报告，本文共收集了83组砂样动三轴试验数据，并分类统计分析了松散~稍密、中密和密实三种密实程度的砂土在8个典型剪应变下的动剪切模量比和阻尼比统计值。选取一个典型钻孔，建立土层地震反应模型，分别以本文"统计值"、"规范值"和"推荐值"作为模型参数进行土层地震反应计算，并对反应得到的地面峰值加速度与反应谱进行了对比分析。
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| 关 键 词： | 陕北榆林地区 砂土 动三轴 剪应变 动剪切模量比 阻尼比 统计值 |
Statistical study on dynamic shear modulus ratio and damping ratio of sand in Yulin Area of Northern Shaanxi |
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| REN Fengwen,WANG Xiaojun,ZHANG Hanliang,NIE Dawei.Statistical study on dynamic shear modulus ratio and damping ratio of sand in Yulin Area of Northern Shaanxi[J].World Information On Earthquake Engineering,2021,0(4):231-239. |
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| Authors: | REN Fengwen WANG Xiaojun ZHANG Hanliang NIE Dawei |
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| Institution: | Shaanxi Earthquake Agency, Xi’an 710068, China |
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| Abstract: | The Yulin area of northern Shaanxi is located inside the Ordos block, and its sedimentary strata are mainly fine sand. Based on a large number of seismic safety evaluation reports of engineering sites in this area, this paper collected 83 sets of dynamic triaxial test data of sand samples. In addition, the statistical values of dynamic shear modulus ratio and damping ratio of three types of sands of loose to slightly dense, medium dense and dense under 8 typical shear strains are analyzed. Select a typical borehole, establish a soil seismic response model, and use the "statistical value", "standard value" and "recommended value" as model parameters to calculate the soil seismic response. The ground peak acceleration and response spectrum obtained by the reaction were compared and analyzed. |
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| Keywords: | Yulin Area of Northern Shaanxi sand dynamic triaxial shear strain dynamic shear modulus ratio damping ratio statistics |
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