1. Ph.D. Candidate, Structures Laboratory, Dept. of Civil Engineering, Univ. of Patras, 26504 Patras, Greece.
2. Professor, Structures Laboratory, Dept. of Civil Engineering, Univ. of Patras, 26504 Patras, Greece (corresponding author).
3. Postdoctoral Researcher, Structures Laboratory, Dept. of Civil Engineering, Univ. of Patras, 26504 Patras, Greece.
4. Professor Emeritus, Structures Laboratory, Dept. of Civil Engineering, Univ. of Patras, 26504 Patras, Greece.