摘要
鉴于中外对阻尼比的确定方法没有达成共识的现状,以福建标准砂(粒径0.5~1.0 mm)为试验对象,采用不排水应力控制动三轴试验,对比分析现有阻尼比确定方法:传统法、Das法、Kokusho法、Kumar法、互相关函数法,评价其差异性。结果表明:总体上,5种阻尼比确定方法确定的阻尼比差异性较大,Kumar法确定的阻尼比最接近平均阻尼比,互相关函数法远高于平均阻尼比,Das法和Kokusho法确定的阻尼比基本一致但低于平均阻尼比,传统方法远低于平均阻尼比。可见加载方式为应力控制时,可采用Kumar法确定阻尼比。
In view of the current situation that there is no consensus on the determination method of damping ratio at home and abroad,taking Fujian standard sand(particle size 0.5~1.0 mm)as the test object,the undrained stress controlled dynamic triaxial test was adopted to compare and analyze the existing damping ratio determination methods:traditional method,Das method,Kokusho method,Kumar method and cross-correlation function method,and their differences were evaluated.The results show that in general,the damping ratio determined by the five damping ratio determination methods are quite different.The damping ratio determined by Kumar method is closest to the average damping ratio,the damping ratio determined by the cross-correlation function method is much higher than the average damping ratio,the damping ratio determined by Das method and Kokusho method are basically the same but lower than the average damping ratio.The damping ratio determined by the traditional method is much lower than the average damping ratio.It can be seen that when the loading mode is stress control,Kumar method can be used to determine the damping ratio.
作者
冯震
郭涛
宋东松
FENG Zhen;GUO Tao;SONG Dong-song(College of Civil Engineering and Architecture, Hebei University, Baoding 071002, China;Hebei Civil Engineering Monitoring and Evaluation Technology Innovation Center, Baoding 071002, China)
出处
《科学技术与工程》
北大核心
2022年第5期2016-2023,共8页
Science Technology and Engineering
基金
河北省自然科学基金(E2020201017,E2019201422)。
关键词
动三轴试验
阻尼比
砂土
确定方法
dynamic triaxial test
damping ratio
sand
determination method
