1. Graduate Student, Dept. of Civil Engineering, Univ. of Akron, Akron, OH 44325.
2. Professor, Dept. of Mechanical Engineering, Univ. of Akron, Akron, OH 44325.
3. Associate Professor, Dept. of Civil Engineering, Univ. of Akron, Akron, OH 44325 (corresponding author).
4. Associate Dean of Graduate Study, College of Engineering; and Professor, Dept. of Civil Engineering, Univ. of Akron, Akron, OH 44325.