1. Associate Professor and Vice Chair, Dept. of Civil and Environmental Engineering, 5731 Boelter Hall, Univ. of California, Los Angeles, CA 90095-1593 (corresponding author).
2. Professor and Chair in Geotechnics and Soil–Structure Interaction, Dept. of Civil Engineering, University Walk, Clifton BS8, Univ. of Bristol, U.K.; Professor, Univ. of Patras, Greece; Adjunct Professor, Dept. of Civil and Environmental Engineering, 5731 Boelter Hall, Univ. of California, Los Angeles, CA 90095-1593.
3. Professor and Chair, Dept. of Civil and Environmental Engineering, 5731 Boelter Hall, Univ. of California, Los Angeles, CA 90095-1593.