1. Associate Professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Dr., N.W., Atlanta, GA 30332-0355 (corresponding author). E-mail: sburns@gatech.edu
2. Assistant Professor, Dept. of Civil Engineering, 204C Peter Kiewit Institute, Univ. of Nebraska-Lincoln, Omaha Campus, 1110 South 67th St., Omaha, NE 68182-0178. E-mail: slbartelt@unomaha.edu
3. Professor, Dept. of Civil Engineering, Univ. of Virginia, Charlottesville, VA 22904-4742. E-mail: jsmith@virginia.edu
4. Engineer II, Hull & Associates, Inc., 4900 Parkway Dr., Suite 100, Mason, OH 45040. E-mail: andriazoe@alumni.virginia.edu