1. Assistant Professor, School of Architecture, Univ. of Southern California, Watt Hall 316, Los Angeles, CA 90089-0291 (corresponding author).
2. Graduate Student, Sonny Astani Dept. of Civil and Environmental Engineering, Viterbi School of Engineering, Univ. of Southern California, 3620 S. Vermont Ave., Los Angeles, CA 90089-2531.
3. Professor, Applied Computing and Mechanics Laboratory (IMAC), Civil Engineering Institute, School of Architecture, Civil and Environmental Engineering (ENAC), Station 18, Swiss Federal Institute of Technology (EPFL), Lausanne 1015, Switzerland.