1. Research Associate, Dept. of Civil Engineering, Univ. of Texas at Arlington, Box 19308, Arlington, TX 76019.
2. Distinguished Scholar Professor, Dept. of Civil Engineering, Univ. of Texas at Arlington, Box 19308, Arlington, TX 76019 (corresponding author).
3. Professor, Dept. of Civil Engineering, Univ. of Texas at Arlington, Box 19308, Arlington, TX 76019.
4. Assistant Professor, Dept. of Civil Engineering, Boise State Univ., Boise, ID 83725.