1. Assistant Professor, Highway and Pavement Engineering, Civil Engineering Dept., Democretus Univ. of Thrace, 67100 Xanthi, Greece.
2. Professor, Highway Engineering Laboratory, Civil Engineering Dept., Aristotle Univ. of Thessaloniki, 54006 Thessaloniki, Greece.
3. Postdoctoral Researcher, Institute of Steel Structures, Civil Engineering Dept., Aristotle Univ. of Thessaloniki, 54006 Thessaloniki, Greece.