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