1. Graduate Student, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
2. Assistant Professor, Tohoku Univ., Miyagi Prefecture 980-8577, Japan; formerly, Assistant Professor, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
3. Graduate Research Assistant, Dept. of Civil, Architectural & Environmental Engineering, Missouri Univ. of Science and Technology, 1401 N. Pine Street, 208 Pine Box Building, Rolla, MO 65401.
4. Benavides Associate Professor, Dept. of Civil, Architectural & Environmental Engineering, Missouri Univ. of Science and Technology, 1401 N. Pine Street, 324 Butler-Carlton Hall, Rolla, MO 65401 (corresponding author).
5. Professor Emeritus, Tokyo Institute of Technology, Tokyo 152-8550, Japan.