1. Ph.D. Candidate, Dept. of Civil, Structural, and Environmental Engineering, Univ. at Buffalo, 206 Ketter Hall, Buffalo, NY 14260 (corresponding author).
2. Director, MCEER and Professor, Dept. of Civil, Structural, and Environmental Engineering, Univ. at Buffalo, Buffalo, NY 14260.
3. Profesor Auxiliar, Dept. de Ingenieria Estructural y Geotecnica, Macul, Pontificia Univ. Catolica de Chile, Santiago 782-0436, Chile.