GDS空心圆柱扭剪试验系统阻尼的测定  

The damping determination of the gds hollow cylindrical torsional shear test system

作　　者：马倩倩[1] 刘保健[1] 韩珏[2] 黄俊 解新妍 MA Qianqian;LIU Baojian;HAN Jue;HUANG Jun;XIE Xinyan(Highway School, Chang’an University, Xi’an 710064, China;Shangluo University, Shangluo 726000, China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]商洛学院,陕西商洛726000

出　　处：《铁道科学与工程学报》2017年第12期2632-2636,共5页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51378004)

摘　　要：通过GDS空心圆柱扭剪试验系统的动态三轴试验得到水试样的动应力和动应变时程曲线,采用传统的等效线性模型计算其阻尼比λ_1。通过互相关函数法计算得到系统的阻尼比λ_2,最后将λ_1和λ_2进行比较。研究结果表明:阻尼比随动应力幅值的增大而增大,并呈一定的线性关系即λ=kσ_d,且k的取值范围为4×10^(-5)~7×10^(-5)。Through the dynamic triaxial test of the GDS hollow cylindrical torsional shear test system,the dynamic stress and dynamic strain process curve of water sample was obtained first.The system damping ratioλ1was then calculated through the traditional equivalent linear model.The damping ratio of the systemλ2was calculated on the basis of the cross-correlation function method,andλ1andλ2were finally compared.The experimental result shows that the test damping ratio increases as the dynamic stress amplitude increases,and there is a certain linear relationship between them:λ=kσd and k is between4×10-5and7×10-5.

关 键 词：GDS空心圆柱扭剪试验 动态三轴试验 水试样 阻尼比 

分 类 号：TU4[建筑科学—土工工程]