Document Type : Article
1 Department of Civil Engineering, College of Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran.
2 Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
3 Center of Excellence for Fundamental Studies in Structural Engineering, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran
4 Structural Department, International Institute of Earthquake Engineering and Seismology, Tehran, Iran