1. Graduate Student, Dept. of Civil, Architectural, and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Curtis 251, Philadelphia, PA 19104 (corresponding author).
2. Professor, Dept. of Civil, Architectural, and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Curtis 251, Philadelphia, PA 19104.
3. Professor, Dept. of Special Structures, International Institute of Earthquake Engineering and Seismology, No. 21, Arghavan St., North Dibajee, Farmanieh, 1953714453 Tehran, Iran.