1. Assistant Professor, Dept. of Civil Engineering, Univ. of New Hampshire, Durham, NH 03824. E-mail: jo.daniel@unh.edu
2. Assistant Professor, Dept. of Civil and Environmental Engineering, The Pennsylvania State Univ., State College, PA.
3. Professor, Dept. of Civil Engineering, North Carolina State Univ., Raleigh, NC. E-mail: kim@eos.ncsu.edu