1. Ph.D. student, Civil Engineering Dept., Iran Univ. of Science and Technology, Tehran, Iran.
2. Associate Professor, Civil Engineering Dept., Amirkabir Univ. of Technology (Tehran Polytechnic), Tehran, Iran (corresponding author).
3. Professor, Civil Engineering Dept., Center of Excellence for Fundamental Studies on Structural Mechanics, Iran Univ. of Science and Technology, Tehran, Iran.