1. Senior Engineer, Integrated Design Services, 1 Peters Canyon Rd., Suite 140, Irvine, CA 92606 (corresponding author). E-mail: felipe.perez@idsse.com
2. Joseph T. Stuart Professor of Structural Engineering and Director, ATLSS Center, Dept. of Civil and Environmental Engineering, Lehigh Univ., Bethlehem, PA 18015.
3. Rossin Professor of Structural Engineering and Chair, Dept. of Civil and Environmental Engineering, Lehigh Univ., Bethlehem, PA 18015.