1. Associate Professor, Laboratoire de Génie Civil et Génie Mécanique (LGCGM), Université Européenne de Bretagne, INSA de Rennes, 20, avenue des Buttes de Coësmes, Rennes cedex 35043, France (corresponding author).
2. Assistant, Dept. of Civil Engineering, INESC Coimbra, Univ. of Coimbra, Coimbra 3030-788, Portugal.
3. Professor, Dept. of Civil Engineering and Architecture, ICIST/IST, Technical Univ. of Lisbon, Lisbon 1049-001, Portugal.
4. Professor, Advanced Engineering School, Skolska 1, P.O. Box 318, Novi Sad 21101, Serbia.