1. Postdoctoral Scholar, Department of Civil and Environmental Engineering, Pennsylvania State University, Sackett Building, University Park, PA, USA
2. Research Assistant Professor, Department of Civil and Environmental Engineering, University of South Carolina, 300 Main St, Columbia, SC 29208, USA
3. Postdoctoral Research Associate, Environmental and Energy Institute, University of Hull, Cottingham Rd, Hull HU6 7RX, UK
4. Mr and Mrs Irwin B. Kahn Professor, Department of Civil and Environmental Engineering, University of South Carolina, 300 Main St, Columbia, SC 29208, USA
5. Professor, Department of Civil and Environmental Engineering, University of South Carolina, 300 Main St, Columbia, SC 29208, USA(author for correspondence)