1. Engineer, Goldstein Associates, 31 W. 27th St., New York, NY 10001. E-mail: Mali-ahma@gace.net
2. Associate Professor, Dept. of Civil Engineering, The City College of the City Univ. of New York, Steinman Hall, New York, N.Y. 10031 (corresponding author).
3. Professor, Dept. of Civil Engineering, The City College of the City Univ. of New York, Steinman Hall, New York, N.Y. 10031. E-mail: ghosn@ce.ccny.cuny.edu