1. Professor, Dept. of Civil, Environmental and Construction Engineering, Univ. of Central Florida, P.O. Box 162450, Orlando, FL 32816-2450; and Dept. of Civil Engineering, Univ. of Patras, GR-26500, Greece (corresponding author).
2. Postdoctoral Researcher, Institute of Structural Engineering IBK, Wolfgang-Pauli-Strasse 15, Swiss Federal Institute of Technology ETH Zürich, CH-8093 Zürich, Switzerland; formerly, Ph.D. Student, Dept. of Civil Engineering, Univ. of Patras, GR-26500, Greece.