1. Professor, College of Civil Engineering and Architecture, Zhejiang Univ., 866 Yuhangtang Rd., An-zhong Bldg., Hangzhou, Zhejiang 310058, China (corresponding author).
2. Ph.D. Candidate, College of Civil Engineering and Architecture, Zhejiang Univ., 866 Yuhangtang Rd., An-zhong Bldg., Hangzhou, Zhejiang 310058, China.
3. Ph.D. Candidate, Zachry Dept. of Civil Engineering, Texas A&M Univ., 3136 TAMU, CE/TTI Bldg. 508K, College Station, TX 77843.
4. Senior Lecturer, Aston Institute of Materials Research, Aston Univ., Aston Triangle, Birmingham B4 7ET, UK.