1. Engineer, Englekirk Partners Consulting Structural Engineers Inc., Los Angeles, CA 90018; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697-2175.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697-2175 (corresponding author).
3. Professor, Dept. of Mechanical Engineering, Wayne State Univ., Detroit, MI 48202.