加荷频率对粉土动模量和阻尼比影响规律的试验研究  

Experimental Study on Influence of Loading Frequency on Dynamic Modulus and Damping Ratio of Silty Soil

作　　者：张伟[1] 颜廷方[1] 孙爱华[1] ZHANG Wei;YAN Ting-fang;SUN Ai-hua(Shandong Water Conservancy Vocational College,Rizhao 276826,China)

机构地区：[1]山东水利职业学院,山东日照276826

出　　处：《山东农业大学学报（自然科学版）》2020年第5期958-961,共4页Journal of Shandong Agricultural University：Natural Science Edition

摘　　要：本文通过动三轴实验来分析了粉土的阻尼比及动模量受到初始剪应力、固结压力和加荷频率等因素的影响机制,同时深入地探讨加荷频率所造成的具体影响规律,发现在增加振动频率之后,将会提升动模量的值,然而其增幅不大;粉土的阻尼比受到振动频率的影响不明显。所得结果有助于指导工程项目中合理地选择相关的动力参数。The effect of loading frequency,consolidation pressure and initial shear stress on the dynamic modulus and damping ratio of silty soil were studied by dynamic triaxial test in this paper.The effect of loading frequency on the dynamic modulus and damping ratio of silty soil was obtained.The rule was that the higher the frequency was,the greater the dynamic modulus was.Vibration frequency has little influence on damping ratio.According to this conclusion,it provided a scientific experimental basis for the actual engineering dynamic parameter selection.

关 键 词：频率 粉土 动模量 阻尼比 

分 类 号：TU411.8[建筑科学—岩土工程]