TY - JOUR
T1 - Dynamic test study of strip foundation on fabric anisotropic ground
AU - Li, Bo
AU - Wang, Yan Ru
AU - Zeng, Xiang Wu
PY - 2013/6
Y1 - 2013/6
N2 - Seismic Liquefaction is a hot topic in soil dynamics. Some past researches show that fabric anisotropy of sandy soil due to normal distribution of contact and particle shape may affect its dynamic characteristic. To explore the effects of fabric anisotropy on dynamic response of the superstructure and its ground, six centrifuge tests were performed on scaled model with different directions of sandy soil deposition to simulate its anisotropy and could reproduce the influences of fabric anisotropy on dynamic characteristics of strip foundation and ground, including accelerations and horizontal displacements of the strip foundation, accelerations, subsidence and excess pore water pressure of the ground. It was concluded that fabric anisotropy greatly influenced the dynamic characteristics of strip foundation and ground especially in the saturation case. The liquefaction resistance of model in 90°deposition direction is lower than those of other models from observation of acceleration and pore pressure evolution, which were indicated by serious subsidence and residual horizontal displacement of the ground. It is recommended that in order to precisely predict the dynamic performance of structure in earthquake area, the effect of fabric anisotropy on dynamic response of ground should be incorporated in the site investigation.
AB - Seismic Liquefaction is a hot topic in soil dynamics. Some past researches show that fabric anisotropy of sandy soil due to normal distribution of contact and particle shape may affect its dynamic characteristic. To explore the effects of fabric anisotropy on dynamic response of the superstructure and its ground, six centrifuge tests were performed on scaled model with different directions of sandy soil deposition to simulate its anisotropy and could reproduce the influences of fabric anisotropy on dynamic characteristics of strip foundation and ground, including accelerations and horizontal displacements of the strip foundation, accelerations, subsidence and excess pore water pressure of the ground. It was concluded that fabric anisotropy greatly influenced the dynamic characteristics of strip foundation and ground especially in the saturation case. The liquefaction resistance of model in 90°deposition direction is lower than those of other models from observation of acceleration and pore pressure evolution, which were indicated by serious subsidence and residual horizontal displacement of the ground. It is recommended that in order to precisely predict the dynamic performance of structure in earthquake area, the effect of fabric anisotropy on dynamic response of ground should be incorporated in the site investigation.
KW - Anisotropy ground
KW - Dynamic centrifuge test
KW - Dynamic test
KW - Strip foundation
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M3 - Article
AN - SCOPUS:84880367674
SN - 1004-4523
VL - 26
SP - 443
EP - 450
JO - Zhendong Gongcheng Xuebao/Journal of Vibration Engineering
JF - Zhendong Gongcheng Xuebao/Journal of Vibration Engineering
IS - 3
ER -