1. Graduate Research Assistant, Dept. of Civil Engineering, Ohio Univ., Athens, OH 45701.
2. Associate Professor, Dept. of Civil Engineering, Ohio Univ., Athens, OH 45701 (corresponding author).
3. Professor, Dept. of Civil Engineering, Univ. of Akron, Akron, OH 44325.
4. Professor, School of Electrical Engineering and Computer Science, Ohio Univ., Athens, OH 45701.
5. Graduate Assistant, Dept. of Civil Engineering, Univ. of Akron, Akron, OH 44304.
6. Associate Professor, Dept. of Civil Engineering, Ohio Univ., Athens, OH 45701.