1. Graduate Assistant, Dept. of Civil Engineering, Case Western Reserve Univ., 2104 Adelbert Rd., Bingham 256, Cleveland, OH 44106-7201.
2. Associate Professor, Dept. of Civil Engineering, Case Western Reserve Univ., 2104 Adelbert Rd., Bingham 206, Cleveland, OH 44106-7201 (corresponding author).
3. Graduate Assistant, Dept. of Electrical Engineering and Computer Science, Case Western Reserve Univ., 2104 Adelbert Rd., Bingham 203C, Cleveland, OH 44106-7201.
4. Civil Associate II, Michael Baker Inc., Centre City Tower, Suite 2010, 650 Smithfield St., Pittsburgh, PA 15222.