1. Xi'an Jiaotong University Department of Civil Engineering, School of Human Settlements and Civil Engineering No.28, West Xianning Road Xi'an, Shaanxi 710049 P.R. China
2. Delft University of Technology Faculty of Civil Engineering and Geosciences Building 23, Stevinweg 1 / PO box 5048 2628 CN Delft Netherlands
3. Tongji University Department of Bridge Engineering 1239 Siping Road Shanghai 200092 P.R. China