1. Research Engineer, Road & Railway Research Laboratory, Faculty of Civil Engineering and GeoSciences, Delft University of Technology, P.O. Box 5048, 2628 CN Delft, The Netherlands
2. Research Engineer, Section of Structural Mechanics, Faculty of Civil Engineering and GeoSciences, Delft University of Technology, P.O. Box 5048, 2628 CN Delft, The Netherlands
3. Associate Professor, Section of Structural Mechanics, Faculty of Civil Engineering and GeoSciences, Delft University of Technology, P.O. Box 5048, 2628 CN Delft, The Netherlands