1. Structures Department; LNEC; Av. Brasil 101 1700-066 Lisboa Portugal
2. Bouygues Travaux Publics, Technical Division; 1 Avenue Eugène Freyssinet 78061 Saint-Quentin en Yvelines France
3. Department of Civil Engineering, Architecture and Geo-resources; University of Lisbon, IST; Av. Rovisco Pais 1049-001 Lisboa Portugal
4. Materials and Structures Department; University Paris-Est, IFSTTAR; 14-20 Boulevard Newton, Champs sur Marne, F-77447 Marne la Vallée Cedex 2 Paris France