摘要
利用DRNEVICH LONG-TOR型共振柱仪研究杭州湾浅层粉质粘土的动力学性质,阐述动模量和阻尼比随应变增加的变化趋势,分析动模量衰减规律。最大动模量主要与围压Pc、土的固结密度、动应变和初始孔隙比等因素有关;杭州湾粉质粘土动模量随应变的变化规律符合土的非线性、滞后性和变形累积三方面的一般规律;杭州湾粉质粘土与黄河三角洲地区的归一化应力应变曲线相似,而动阻尼比相差较大。
Stress-strain behavior of silty clay in Hangzhou bay is studied by using 'DRNEVICH LONG-TOR' resonant column apparatus.The change trend of dynamic module and damping ratio with strain increasing is analyzed,and the attenuation law of dynamic is gained.The max dynamic module is mainly relevant with confining pressure,consolidation density,initial pore ratio and dynamic shear strain.The Gd～γd curve accords with soil nonlinearity,hysteresis,and accumulative deformation.The silty clay from various regions have analogous stress-strain curve but variant damping ratio.
出处
《世界地震工程》
CSCD
北大核心
2010年第S1期1-5,共5页
World Earthquake Engineering
基金
国家海洋局第二海洋研究所基本科研业务费专项项目(JG200807
1450-工
JG0915)
浙江省自然科学基金项目(Y5100027)
关键词
共振柱试验
粉质粘土
动弹性模量
动剪切模量
阻尼比
resonant column test
silty clay
dynamic elastic module
dynamic shear module
damping ratio
