1. Ph.D. Student, Charles E. Via, Jr., Dept. of Civil and Environmental Engineering, Patton Hall, Virginia Tech, Blacksburg, Virginia, USA, 24061.
2. Vecellio Professor, Charles E. Via, Jr., Dept. of Civil and Environmental Engineering, Patton Hall, Virginia Tech, Blacksburg, Virginia, USA, 24061.
3. Assistant Professor, Charles E. Via, Jr., Dept. of Civil and Environmental Engineering, Patton Hall, Virginia Tech, Blacksburg, Virginia, USA, 24061.