1. Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011, USA
2. Department of Electrical and Computer Engineering, Iowa State University, Ames, IA 50011, USA
3. Institute of Structural Engineering, Department of Civil, Environmental & Geomatic Engineering, ETH Zürich, 8093 Zürich, Switzerland
4. Department of Civil and Environmental Engineering, University of Perugia, 06125 Perugia, Italy