1. Assistant Professor, Yildiz Technical Univ., Maslak Campus, 309 34396 Maslak, Istanbul, Turkey.
2. Assistant Civil/Structural Engineer, Black and Veatch Corporation, 11401 Lamar Ave., Overland Park, KS 66211.
3. Professor, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045 (corresponding author).
4. Associate Professor, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045.
5. A.P. Learned Professor, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045.