TY - JOUR
T1 - Dynamic Shear Modulus and Damping Ratio of Compacted Silty Clay Subjected to Freeze-Thaw Cycles
AU - Jing, Ruxin
AU - Zhang, Feng
AU - Feng, Decheng
AU - Liu, Xueyan
AU - Scarpas, Athanasios
PY - 2019
Y1 - 2019
N2 - Subgrade and foundation soils undergo freeze and thaw cycles in seasonally frozen regions that leads to changes in its mechanical properties, causing the degradation of its service performance. This study aims to investigate the effects of freeze-thaw cycles on the dynamic mechanical properties of compacted silty clay. Specifically, the effects of number of freeze-thaw cycle, confining pressure, initial compaction degree, and initial water content on the dynamic shear modulus and damping ratio were studied by using resonant column tests. The test results showed that both maximum dynamic shear modulus and maximum damping ratio of the compacted silty clay sample had a decreasing trend with the increasing number of freeze-thaw cycles. In addition, the maximum dynamic shear modulus was significantly increased with the initial compaction degree and it was decreased with the initial water content, while the maximum damping ratio was decreased with the initial compaction degree and it was increased with the initial water content. Finally, the empirical models of maximum dynamic shear modulus and maximum damping ratio were proposed to consider the varied parameters.
AB - Subgrade and foundation soils undergo freeze and thaw cycles in seasonally frozen regions that leads to changes in its mechanical properties, causing the degradation of its service performance. This study aims to investigate the effects of freeze-thaw cycles on the dynamic mechanical properties of compacted silty clay. Specifically, the effects of number of freeze-thaw cycle, confining pressure, initial compaction degree, and initial water content on the dynamic shear modulus and damping ratio were studied by using resonant column tests. The test results showed that both maximum dynamic shear modulus and maximum damping ratio of the compacted silty clay sample had a decreasing trend with the increasing number of freeze-thaw cycles. In addition, the maximum dynamic shear modulus was significantly increased with the initial compaction degree and it was decreased with the initial water content, while the maximum damping ratio was decreased with the initial compaction degree and it was increased with the initial water content. Finally, the empirical models of maximum dynamic shear modulus and maximum damping ratio were proposed to consider the varied parameters.
KW - Compacted silty clay
KW - Dynamic mechanical parameter
KW - Empirical predicted formula
KW - Freeze-thaw cycle
KW - Resonant column test
UR - http://www.scopus.com/inward/record.url?scp=85070255387&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)MT.1943-5533.0002893
DO - 10.1061/(ASCE)MT.1943-5533.0002893
M3 - Article
AN - SCOPUS:85070255387
SN - 0899-1561
VL - 31
JO - Journal of Materials in Civil Engineering
JF - Journal of Materials in Civil Engineering
IS - 10
M1 - 04019244
ER -