岩土工程学报2013，Vol.35Issue(z1)：322-327,6.
循环荷载作用下饱和压实黄土动力特性研究
Dynamic characteristics of saturated compacted loess under cyclic loads
摘要
Abstract
Based on a series of dynamic triaxial tests on saturated compacted loess,the relationships among the excess pore water pressures,axial strains,effective stress paths,hysteresis loops and number of loading cycles are studied.Then,the effects of dynamic characteristics under different excitation amplitudes and dry densities are investigated.The results show that the excess pore water pressures and axial strains increase significantly at the beginning of triaxial tests.However,the effects of loading cycles on the excess pore water pressures and axial strains decrease gradually with the increase of loading cycles and become negligible when the loading cycles exceed a certain value.The effective stress paths move to left gradually with the increase of loading cycles,but the degrees of movement decrease gradually.The effective stress paths at the loading phase are essentially coincident with those at the unloading phase when the load cycles exceed a certain value.The hysteresis loops move to right gradually with the increase of loading cycles.With the increase of excitation amplitude,the excess pore water pressures and axial strains increase gradually.With the increase of dry density,the excess pore water pressures and axial strains decrease gradually.关键词
饱和压实黄土/动力特性/循环荷载/动三轴试验/轴向应变/超孔隙水压力Key words
saturated compacted loess/ dynamic characteristic/ cyclic load/ dynamic triaxial test/ axial strain/ excess pore water pressure分类
建筑与水利引用本文复制引用
张军,郑俊杰,曹文昭,赖汉江..循环荷载作用下饱和压实黄土动力特性研究[J].岩土工程学报,2013,35(z1):322-327,6.基金项目
山西省交通建设科技项目(10-2-05) （10-2-05）
