1. Senior Engineer, Arup Singapore Pte Ltd., 371 Beach Rd. #03-01 Keypoint Singapore, 199597. E-mail: zhang.jing@arup.com
2. Associate Professor, Dept. of Civil Engineering, P.O. Box 27272, College of Engineering, Univ. of Sharjah, Sharjah-UAE. E-mail: cvemm@yahoo.com
3. Professor, Deputy Head, Dept. of Civil Engineering, National Univ. of Singapore, 117576. E-mail: cveqst@nus.edu.sg