1. Associate Professor, Dept. of Architectural Engineering, Kwangju Univ., 593 Jinwol, Namgu, Kwangju, South Korea.
2. Engineer, KPFF Consulting Engineers, 1601 Fifth Ave., Suite 1600, Seattle, WA 98101.
3. Research Engineer, Dept. of Civil Engineering and Applied Mechanics, McGill Univ., 817 Sherbrooke St. W., Montreal PQ, Canada H3A 2K6.
4. Professor, Dept. of Civil Engineering and Applied Mechanics, McGill Univ., 817 Sherbrooke St. W., Montreal PQ, Canada H3A 2K6.