1. Dept. of Civil, Architectural, Environmental, Land Planning, and Mathematic Engineering, Univ. of Brescia, Via Branze 43, 25100 Brescia, Italy (corresponding author).
2. Associate Professor of Structural Engineering, Dept. of Planning and Design in Complex Environment, IUAV Univ. of Venice, Dorsoduro 2206, 30123 Venezia, Italy.