TY - JOUR
T1 - A p-y curve-based approach to analyze pile behavior in liquefied sand under different stress states
AU - Ni, Sheng-Huoo
AU - Xiao, Xiong
AU - Yang, Yu Zhang
PY - 2014/1/1
Y1 - 2014/1/1
N2 - In general, p-y curves that represent the soil resisting force per unit length of pile as a function of soil displacement are used to model the interaction behavior of soil and pile. However, there are significant uncertainties about how to model soil-pile behavior in liquefied sand, especially for the different softening effect of liquefied soil under different states of soil-pile interaction. A new p-y model, which is capable of reflecting the dilative behavior of soil and the gap effect under different soil stress states, is presented in an attempt to develop a practical approach for soil-pile interaction behavior. This p-y model incorporates an upperbound p-y curve calculated from the improved p-multiplier and y-multiplier and a lower-bound p-y curve regarding the residual state of the soil-pile reaction in liquefied sand. Also, for the stress state between the two boundaries, the p-y curve can be approximately obtained from linear interpolation. The comparison between calculated results and the results of pile lateral-load test, which was taken in medium dense sand liquefied by blast load, indicate that the proposed p-y model provides reasonable estimates of response for piles in liquefied medium dense sand while pile-head displacements were less than 150 mm.
AB - In general, p-y curves that represent the soil resisting force per unit length of pile as a function of soil displacement are used to model the interaction behavior of soil and pile. However, there are significant uncertainties about how to model soil-pile behavior in liquefied sand, especially for the different softening effect of liquefied soil under different states of soil-pile interaction. A new p-y model, which is capable of reflecting the dilative behavior of soil and the gap effect under different soil stress states, is presented in an attempt to develop a practical approach for soil-pile interaction behavior. This p-y model incorporates an upperbound p-y curve calculated from the improved p-multiplier and y-multiplier and a lower-bound p-y curve regarding the residual state of the soil-pile reaction in liquefied sand. Also, for the stress state between the two boundaries, the p-y curve can be approximately obtained from linear interpolation. The comparison between calculated results and the results of pile lateral-load test, which was taken in medium dense sand liquefied by blast load, indicate that the proposed p-y model provides reasonable estimates of response for piles in liquefied medium dense sand while pile-head displacements were less than 150 mm.
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U2 - 10.6310/jog.2014.9(3).1
DO - 10.6310/jog.2014.9(3).1
M3 - Article
AN - SCOPUS:84920555497
SN - 1990-8326
VL - 9
SP - 85
EP - 93
JO - Journal of GeoEngineering
JF - Journal of GeoEngineering
IS - 3
ER -