1. Researcher, Faculty of Civil Engineering and Geosciences, Section of Structural Mechanics, Delft Univ. of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands (corresponding author).
2. Associate Professor, Faculty of Civil Engineering and Geosciences, Section of Structural Mechanics, Delft Univ. of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands.
3. Researcher, Faculty of Civil Engineering and Geosciences, Section of Structural Mechanics, Delft Univ. of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands.
4. Emeritus Professor, Faculty of Civil Engineering and Geosciences, Section of Structural Mechanics, Delft Univ. of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands.