1. Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology, Arghavan St., North Dibajee, Farmanieh, P.O. Box 19537-14453, Tehran, Iran.
2. Associate Professor, Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology, Arghavan St., North Dibajee, Farmanieh, P.O. Box 19537-14453, Tehran, Iran (corresponding author).