1. Assistant Professor, Dept. of Building Engineering, Tongji Univ., 1239 Siping Rd., Shanghai, China; formerly, Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Tennessee Knoxville, 223 Perkins Hall, Knoxville, TN 37996-2010.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee Knoxville, 223 Perkins Hall, Knoxville, TN 37996-2010 (corresponding author).
3. Dept. of Civil Engineering, Univ. of Minnesota, 122 CivE Building, 500 Pillsbury Dr. S.E., Minneapolis, MN 55455-0220.