1. Assoc. Prof., Faculty of Engrg., Hokkaigakuen Univ., W-11, S-26, Chunouku, Sapporo, Japan; Formerly Research Asst., School of Civ. Engrg., Purdue Univ., West Lafayette, Ind. 47907
2. Prof. and Head of Struct. Engrg., School of Civ. Engrg., Purdue Univ., West Lafayette, Ind. 47907