1. Postdoctoral Researcher, Institute of Structural Engineering, Swiss Federal Institute of Technology, Zürich, Switzerland; formerly, Ph.D. Student, Dept. of Civil Engineering, Univ. of Patras, Patras, Greece (corresponding author).
2. Professor, Dept. of Civil Engineering, Division of Structures, Univ. of Patras, GR-26500 Patras, Greece.