1. Professor, Division of Civil Engineering, Univ. of Dundee, Nethergate, Dundee DD1 4HN, Scotland; formerly, Assistant Professor, School of Civil Engineering, National Technical Univ. of Athens, Athens 10682, Greece (corresponding author).
2. Postdoctoral Researcher, School of Civil Engineering, National Technical Univ. of Athens, Athens 10682, Greece.
3. Graduate Student, Columbia Univ., New York, NY 10027; formerly, Student, National Technical Univ. of Athens, Athens 10682, Greece.
4. Professor, School of Civil Engineering, National Technical Univ. of Athens, Athens 10682, Greece.