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。
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.
作者
任凤文
王晓军
张晗亮
聂大巍
REN Fengwen;WANG Xiaojun;ZHANG Hanliang;NIE Dawei(Shaanxi Earthquake Agency, Xi′an 710068, China)
出处
《世界地震工程》
CSCD
北大核心
2021年第4期231-239,共9页
World Earthquake Engineering
基金
陕西省地震局启航与创新基金课题《陕北榆林地区砂土的动力学参数统计研究》资助。
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
Yulin Area of Northern Shaanxi
sand
dynamic triaxial
shear strain
dynamic shear modulus ratio
damping ratio
statistics
