1. Professor, Dept. of Structural Engineering, Univ. of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0085.
2. Engineer, KPFF Consulting Engineers, 180 Pacific Ave., San Francisco, CA 94111; formerly, Graduate Student Researcher, Dept. of Structural Engineering, Univ. of California, San Diego, CA.
3. Visiting Associate Professor, Dept. of Structural Engineering, Univ. of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0085.