1. Assistant Professor, Dept. of Civil, Environmental, and Architectural Engineering, The Univ. of Kansas, 1530 W. 15th St., 2150 Learned Hall, Lawrence, KS 66045 (corresponding author). E-mail: ybai@ku.edu
2. Professor, Dept. of Engineering Technology and Civil Engineering, Texas Tech Univ., Lubbock, TX 79409. E-mail: randy.burkett@coe.ttu.edu