山东理工大学学报（自然科学版）2026，Vol.40Issue(2)：30-35,6.
循环交通动载下粗粒土动弹性模量及阻尼比试验研究
Experimental study on dynamic elastic modulus and damping ratio of coarse-grained soil under cyclic traffic dynamic load
摘要
Abstract
Coarse-grained soil is a widely used roadbed filler.In order to study the dynamic characteris-tics of coarse-grained soil under cyclic traffic dynamic load,dynamic triaxial tests of coarse-grained soil under multiple confining pressures(50,100,150 kPa)and consolidation ratios(1.0,1.5)were carried out.The variations of backbone curve,dynamic elastic modulus and damping ratio were analyzed,and the Hardin-Drnevich model was used to fit the backbone curve.The results show that:(1)As the dy-namic stress amplitude increases,the slope of the backbone curve gradually becomes steeper.With the increase of confining pressure,the dynamic stress required to achieve the same strain rises.Under the same dynamic stress level,the negative strain of isobaric consolidation is greater than that of eccentric consolidation,implying that the dynamic strain decreases with the increase of consolidation ratio.(2)With the increase of dynamic strain,the dynamic elastic modulus decreases gradually while the damping ratio increases.With the increase of confining pressure,the dynamic elastic modulus increases gradually,while the damping ratio decreases.Increasing the consolidation ratio will reduce the dynamic elastic mod-ulus.(3)The applicability of Hardin-Drnevich model effectively describes the hyperbolic characteristics of the backbone curve of coarse-grained soil.The research results can provide reference for the analysis of dynamic characteristics of coarse-grained soil used as subgrade filling.关键词
粗粒土/动三轴试验/骨干曲线/动弹性模量/阻尼比/Hardin-Drnevich模型Key words
coarse grained soil/dynamic triaxial test/backbone curve/dynamic modulus of elasticity/damping ratio/Hardin-Drnevich model分类
交通工程引用本文复制引用
HU Wenjun,ZHANG Han,XUE Yi,HAN Yutong,JIA Jianghua,CHENG Yu..循环交通动载下粗粒土动弹性模量及阻尼比试验研究[J].山东理工大学学报（自然科学版）,2026,40(2):30-35,6.基金项目
山东省自然科学基金项目(ZR2021ME238) （ZR2021ME238）
