1. Assistant Professor, Dept. of Building Engineering, Tongji Univ., A422 New Civil Engineering Building, 1239 Siping Road, Shanghai, China 200092; 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. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, Knoxville, 223 Perkins Hall, Knoxville, TN 37996-2010.
4. Professor, Dept. of Civil Engineering, Univ. of Minnesota, 122 CivE Building, 500 Pillsbury Dr. S.E., Minneapolis, MN 55455-0220.