1. Englekirk Partners Consulting Structural Engineers, Inc., Los Angeles, CA 90018; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of California at Irvine, Irvine, CA 92697-2175.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, at Irvine, Irvine, CA 92697-2175.