TY - JOUR
T1 - Significance of small strain damping and dilation parameters in numerical modeling of free-field lateral spreading centrifuge tests
AU - Phillips, Camilo
AU - Hashash, Youssef M.A.
AU - Olson, Scott M.
AU - Muszynski, Mark R.
N1 - Funding Information:
The research presented in this paper was sponsored by the National Science Foundation through the Network for Earthquake Engineering Simulation (NEES) Award NSF number: 0723697 NEESR-SG . Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the sponsoring agencies.
PY - 2012/11
Y1 - 2012/11
N2 - Lateral spreads are complex dynamic phenomena that are challenging to represent numerically. In this paper numerical models are developed and calibrated using the displacement, acceleration, and pore water pressure time histories recorded in a free-field lateral spreading centrifuge test. The calibrated numerical model then is used to predict another free-field lateral spreading centrifuge test using the same soil profile but different input acceleration time history. The computed response shows good agreement with the centrifuge test measurements. This paper demonstrates that even in a large strain problem, such as lateral spreading, small strain damping plays an important role in numerical simulation results; it also shows the need to have pressure dependent dilation parameters in the employed soil constitutive model implemented in order to simultaneously reproduce measurements of pore water pressure, acceleration and lateral displacement.
AB - Lateral spreads are complex dynamic phenomena that are challenging to represent numerically. In this paper numerical models are developed and calibrated using the displacement, acceleration, and pore water pressure time histories recorded in a free-field lateral spreading centrifuge test. The calibrated numerical model then is used to predict another free-field lateral spreading centrifuge test using the same soil profile but different input acceleration time history. The computed response shows good agreement with the centrifuge test measurements. This paper demonstrates that even in a large strain problem, such as lateral spreading, small strain damping plays an important role in numerical simulation results; it also shows the need to have pressure dependent dilation parameters in the employed soil constitutive model implemented in order to simultaneously reproduce measurements of pore water pressure, acceleration and lateral displacement.
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U2 - 10.1016/j.soildyn.2012.06.001
DO - 10.1016/j.soildyn.2012.06.001
M3 - Article
AN - SCOPUS:84863472760
SN - 0267-7261
VL - 42
SP - 161
EP - 176
JO - Soil Dynamics and Earthquake Engineering
JF - Soil Dynamics and Earthquake Engineering
ER -