TY - CHAP
T1 - Modelling of Liquefaction-Induced Instability in Pile Groups
AU - Knappett, Jonathan A.
AU - Gopal Madabhushi, S. P.
N1 - Published online April 26, 2012
PY - 2006
Y1 - 2006
N2 - Centrifuge testing has been undertaken to investigate instability failure of pile groups during seismic liquefaction, with specific reference to the 'top-down' propagation of liquefaction during the earthquake and to account for initial imperfections in pile geometry. The results of these tests were used to validate numerical models within the finite element program ABAQUS, based on the popular p-y analysis method. Pseudostatic classical and post-buckling analyses were conducted to examine the collapse behaviour of the pile groups and were found to give reasonable predictions of collapse load and conservative predictions of the associated deflection conditions. This numerical model was compared to currently published methods which were found to over-predict collapse loads. The resulting insights into the collapse of axially loaded pile groups revealed that the failure load is strongly dependent on both the depth of liquefaction propagation and initial imperfections, which reduce the collapse load.
AB - Centrifuge testing has been undertaken to investigate instability failure of pile groups during seismic liquefaction, with specific reference to the 'top-down' propagation of liquefaction during the earthquake and to account for initial imperfections in pile geometry. The results of these tests were used to validate numerical models within the finite element program ABAQUS, based on the popular p-y analysis method. Pseudostatic classical and post-buckling analyses were conducted to examine the collapse behaviour of the pile groups and were found to give reasonable predictions of collapse load and conservative predictions of the associated deflection conditions. This numerical model was compared to currently published methods which were found to over-predict collapse loads. The resulting insights into the collapse of axially loaded pile groups revealed that the failure load is strongly dependent on both the depth of liquefaction propagation and initial imperfections, which reduce the collapse load.
UR - http://www.scopus.com/inward/record.url?scp=29244455302&partnerID=8YFLogxK
U2 - 10.1061/40822(184)21
DO - 10.1061/40822(184)21
M3 - Chapter (peer-reviewed)
AN - SCOPUS:29244455302
SN - 9780784408223
VL - GSP 145
T3 - Geotechnical Special Publications (GSP)
SP - 255
EP - 267
BT - Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground
A2 - Boulanger, Ross W.
A2 - Tokimatsu, Kohji
PB - American Society of Civil Engineers (ASCE)
T2 - Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground
Y2 - 16 March 2005 through 18 March 2015
ER -