1. Assistant Professor, Dept. of Civil, Construction, and Environmental Engineering, and Dept. of Electrical and Computer Engineering, Iowa State Univ., 394 Town Engineering, Ames, IA 50011 (corresponding author).
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Perugia, Via G. Duranti 93, Perugia 06125, Italy.
3. Ph.D. Student, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., 394 Town Engineering, Ames, IA 50011.
4. Postdoctorate Fellow, Dept. of Civil and Environmental Engineering, Univ. of Perugia, Via G. Duranti 93, Perugia 06125, Italy.
5. Associate Professor, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., 394 Town Engineering, Ames, IA 50011.
6. Professor, Dept. of Civil and Environmental Engineering, Univ. of Perugia, Via G. Duranti 93, Perugia 06125, Italy.