1. Associate Member, ASCE
2. Prof., Dept. of Civ. Engrg., Colorado State Univ., Fort Collins, CO 80523.
3. Grad. Student, Dept. of Civ. Engrg., Colorado State Univ., Fort Collins, CO 80523.
4. Sr. Res. Sci., Mat. Sci. and Engrg. Lab., Nat. Inst. of Standards and Technol., Boulder, CO 80303.