1. Lecturer, The Univ. of Sheffield, Dept. of Civil and Structural Engineering, Sir Frederick Mappin Building, Sheffield, S1 3JD, U.K. E-mail: g.zanardo@sheffield.ac.uk
2. Prof. of Structural Dynamics, School of Civil and Resource Engineering, Univ. of Western Australia, 35 Stirling Highway, Crawley, WA 6009. E-mail: hao@civil.uwa.edu.au
3. School of Civil and Resource Engineering, Univ. of Western Australia, 35 Stirling Highway, Crawley, WA 6009. E-mail: xia@civil.uwa.edu.au
4. Prof. and Head, School of Civil and Resource Engineering, Univ. of Western Australia, 35 Stirling Highway, Crawley, WA 6009. E-mail: deeks@civil.uwa.edu.au