1. Assoc. Prof., Dept. of Mech. Engrg., Texas A&M Univ., College Station, TX 77843 (corresponding author). E-mail: a-parlos@tamu.edu
2. Prin. Engr., McDermott Engineering, Houston, TX 77077.
3. Assoc. Prof., Dept. of Civ. Engrg., Texas A&M Univ., College Station, TX 77843.