Open AccessExperimental investigation of dynamic shear behavior of typical silt sand in Rudong Offshore Wind Farm
Author(s) -
Xianbo Xiao,
Haiyan Xu,
Xiaonan Yang,
Xue-yong Xu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/768/1/012031
Subject(s) - silt , liquefaction , geotechnical engineering , pore water pressure , damping ratio , shear modulus , offshore wind power , dynamic modulus , overburden pressure , submarine pipeline , geology , shear (geology) , materials science , dynamic mechanical analysis , composite material , engineering , vibration , geomorphology , mechanical engineering , physics , turbine , quantum mechanics , polymer
The dynamic properties of typical silt sand in offshore wind farm are closely related to the stability of offshore wind farm foundations. This study investigates the dynamic behavior of typical silt sand in Rudong offshore wind farm of Jiangsu province based on dynamic triaxial testing and resonant column testing. Specifically, the dynamic properties including dynamic modulus, damping ratio, dynamic strength, dynamic strain, dynamic pore water pressures and stress-strain relationship of the silt sand are studied. It is found that the accumulated strain and pore pressure continuously increase with the increased cyclic number, which eventually leads to liquefaction failure. Soil specimen with a higher confining pressure is more likely to reach liquefaction with a lower number of loading cycles. It is also found that the Hardin-Drnevich model can be used to reflect the mechanism of the effect of confining pressure on the dynamic behavior of the silt sand. The dynamic shear modulus and damping ratio decrease and increase exponentially with the increase of shear strain, respectively.