加载频率对粘性土动力特性影响的试验研究
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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、4Hz、8 Hz、10Hz), 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 double 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 clays damping ratio.
Based on the different vibration frequencies (1Hz、4Hz、8 Hz、10Hz), 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 double 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 clays damping ratio.
引文
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[3] 刘公社,巫志辉.振动频率对强夯黄土动力特性的影响[A].第四届全国土动力学术会议论文集.杭州:浙江大学出版社,1994． 111-114
[4] R.D.Woods,土壤动力性能的测定.地震工程与土动力问题译 文集.北京:地震出版社,1985
[5] 王海东,尚守平,卢华喜,等.场地土动剪模量的试验对比研究[J].湖南:湖南大学学报,2005,32(3)
[6] 谢定义.土动力学[M].西安:西安交通大学出版社,1988
[7] 吴世明.土动力学[M].北京:中国建筑工业出版社,2000
[8] 孙静,袁晓铭.土的动模量和阻尼比研究评述[J].世界地震工程,2003,19(1) :88-95
[2] 张建明,王稳祥.振动频率对饱和砂土动力特性的影响[J].岩土工程学报,1990,12(1) :89-97
[3] 刘公社,巫志辉.振动频率对强夯黄土动力特性的影响[A].第四届全国土动力学术会议论文集.杭州:浙江大学出版社,1994． 111-114
[4] R.D.Woods,土壤动力性能的测定.地震工程与土动力问题译 文集.北京:地震出版社,1985
[5] 王海东,尚守平,卢华喜,等.场地土动剪模量的试验对比研究[J].湖南:湖南大学学报,2005,32(3)
[6] 谢定义.土动力学[M].西安:西安交通大学出版社,1988
[7] 吴世明.土动力学[M].北京:中国建筑工业出版社,2000
[8] 孙静,袁晓铭.土的动模量和阻尼比研究评述[J].世界地震工程,2003,19(1) :88-95
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