加载频率对粘性土动力特性影响的试验研究  

EXPERIMENTAL RESEARCH ON THE INFLUENCE OF LOADING FREQUENCY ON DYNAMIC PROPERTY OF CLAY

作　　者：李定乾[1] 张微伟[2] 印江涛[1] 

机构地区：[1]广州容柏生建筑工程设计事务所,广东广州510170 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《建筑技术开发》2009年第1期7-9,62,共4页Building Technology Development

摘　　要：通过在不同的振动频率1 Hz、4 Hz、8 Hz、10 Hz情况下,研究了粘性土的应力应变曲线、动模量曲线和阻尼比曲线与振动频率的关系,讨论了振动频率对粘性土的动力特性的影响。结果表明:在这四种频率作用下,粘性土的动本构关系均服从双曲线模型;振动频率在应变较小时对土的动模量影响较小、在应变较大时影响较大;振动频率对于粘性土的阻尼比则具有较大的影响。Based on the different vibration frequencies （1Hz.4 Hz,8 Hz,10 Hz） , the relationship between vibration frequency and clay＇s stress - strain curve, dynamic shear modulus curve and damping ratio curve have been studied, and the influence of vibration frequency on clay＇s dynamic property has been discussed. The result shows that： under the influence of the above four frequencies, clay＇s dynamic constitutive relationship all conform to doable curve model ; vibration frequency has greater influence on dynamic shear modulus of the soil when the strain is strong, and less one when the strain is weak; but it has a great influence on clay＇s damping ratio.

关 键 词：振动频率 动力特性 动剪模量 阻尼比 循环单剪试验 

分 类 号：TU411.8[建筑科学—岩土工程]