岩土力学2009，Vol.30Issue(12)：3788-3792,5.
交通荷载作用下结构性软土动本构关系的试验研究
Experimental study of dynamic constitutive relation of structural soft soils under traffic loading
摘要
Abstract
Based on a lot of dynamic triaxial tests, the variation laws of dynamic stress-strain, dynamic elastic modulus and damping ratio of structural soft soils were studied; meanwhile, the influences of vibration wave, frequency and consolidation ratio were investigated. It is concluded that the influence of vibration wave on the type of dynamic stress-strain is not evident; the value between the maximum dynamic modulus E_(dmax) and dynamic shear modulus G_(dmax) is 2.5 times or so. The effect of frequency on the structural soft soil is evident; and there is a threshold vibration frequency. The maximum dynamic modulus E_(dmax) decreases with the consolidation ratio increasing as the confining pressure is less than structural yield pressure; and when strain exceeds a certain value, the maximum dynamic modulus E_d decreases with the consolidation ratio increasing. At a lower strain and deviatoric pressure, the higher the consolidation ratio is, the larger the damping ratio is; and when strain exceeds 0.004, the consolidation ratio increases, meanwhile the damping ratio decreases as the strain value increases. The conclusions can provide a useful guidance for the engineering application.关键词
结构性软土/动三轴试验/本构关系/交通荷载/动模量/阻尼比Key words
structural soft soil/ dynamic triaxial test/ constitutive relation/ traffic loading/ dynamic elastic modulus/ damping ratio分类
建筑与水利引用本文复制引用
雷华阳,姜岩,陆培毅,马占强,司敬成..交通荷载作用下结构性软土动本构关系的试验研究[J].岩土力学,2009,30(12):3788-3792,5.基金项目
国家自然科学基金资助项目(No. 50508021)、天津市科技创新专项资金项目(No. 07FDZDSF02100-02). （No. 50508021）
