加载频率对粘性土动力特性影响的试验研究 |
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引用本文: | 李定乾,;张微伟,;印江涛.加载频率对粘性土动力特性影响的试验研究[J].建筑技术开发,2009(1):7-9. |
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作者姓名: | 李定乾 ;张微伟 ;印江涛 |
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作者单位: | [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 |
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摘 要: | 通过在不同的振动频率1Hz、4Hz、8Hz、10Hz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。
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关 键 词: | 振动频率 动力特性 动剪模量 阻尼比 循环单剪试验 |
EXPERIMENTAL RESEARCH ON THE INFLUENCE OF LOADING FREQUENCY ON DYNAMIC PROPERTY OF CLAY |
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Affiliation: | Li Ding-qian Zhang Wei-wei Yin Jiang-tao |
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Abstract: | 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. |
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Keywords: | vibration frequency dynamic property dynamic shear modulus damping ratio cyclic simple shear test |
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