1. Associate Professor, Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China (corresponding author).
2. Master Student, Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China.
3. Senior Engineer, China Communications Construction Company First Highway Consultants Co., Ltd., No. 4 South University Rd., Beilin District, Xi’an 710064, China.
4. Research Assistant, Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China.