1. Graduate Research Assistant, School of Civil and Construction Engineering, Chongqing Jiaotong Univ., Chongqing 400074, China.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Rutgers, State Univ. of New Jersey, Piscataway, NJ 08854.
3. Professor, School of Civil and Construction Engineering, Chongqing Jiaotong Univ., Chongqing 400074, China (corresponding author).
4. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Rutgers, State Univ. of New Jersey, Piscataway, NJ 08854.