1. Prof., Dept. of Civ. Engrg., Politecnico, Milan, Italy;formerly Visiting Prof., Dept. of Civ. Engrg., Univ. of Illinois, Urbana, Ill.
2. Assoc. Prof., Dept. of Struct. Engrg., Politecnico, Milan, Italy
3. Research Asst., Dept. of Civ. Engrg., Univ. of Illinois, Urbana, Ill.