1. Professor, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Kansas, 1530 W. 15th St., Learned Hall, Lawrence, KS 66045-7609; Chair Professor, Shanghai Jiao Tong Univ., Dong Chuan Rd., Shanghai 200240, China (corresponding author).
2. Graduate Research Assistant, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Kansas, 1530 W. 15th St., Learned Hall, Lawrence, KS 66045-7609.