1. Research Engineer, Faculty of Civil Engineering and Geosciences, Delft Univ. of Technology, 2600 GA Delft, The Netherlands.
2. Associate Professor, Dept. of Civil Engineering, National Univ. of Singapore, Singapore 119260.
3. Research Scholar, Dept. of Civil Engineering, National Univ. of Singapore, Singapore 119260.
4. Structural Engineering Advisor, ExxonMobil Upstream Research Company, Houston, TX 77002.