铁道科学与工程学报2017，Vol.14Issue(2)：264-270,7.
砾类土动弹性模量和阻尼比的影响因素试验研究
Experimental study on influence factors of gravel soil dynamic elastic modulus and damping ratio
摘要
Abstract
Water content, confining pressure, compaction degree, the initial static deviatoric stress and cyclic loading frequency are important factors that affect the dynamic elastic modulus and damping ratio. The dynamic triaxial experiments were conducted to study the effects of these factors on the gravel soil dynamic elastic modulus and damping ratio, and then the laws were gotten. Dynamic elastic modulus is bigger and damping ratio is smaller when confining pressure and compaction degree is higher and moisture content is close to the optimal water content rate. Dynamic elastic modulus and damping ratio have fewer changes when the initial static deviator stress is changing from 0 kPa to 10 kPa. Dynamic elastic modulus and damping ratio also have little difference when cyclic loading frequency is changing from 1 Hz to 2 Hz. Power function models of dynamic elastic modulus of gravel soil were given and the change rules of parameters were gotten under different conditions.关键词
砾类土/动三轴/动弹性模量/阻尼比/影响因素Key words
gravel soil/dynamic triaxial test/dynamic elastic modulus/damping ratio/influence factors分类
建筑与水利引用本文复制引用
刘大鹏,杨晓华,刘恒任,王婧,张红伟..砾类土动弹性模量和阻尼比的影响因素试验研究[J].铁道科学与工程学报,2017,14(2):264-270,7.基金项目
交通运输部西部交通建设科技资助项目(2011318797600) （2011318797600）
江苏建筑职业技术学院校级科研项目(JYZRJJ-15-3) （JYZRJJ-15-3）
江苏建筑职业技术学院高层次人才科研启动项目(JSJY003) （JSJY003）
江苏省住建厅科技项目(2016ZD81) （2016ZD81）
