Department of Civil Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, UK. christopher.quince@glasgow.ac.uk|Department of Civil Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, UK. christopher.quince@glasgow.ac.uk|Department of Civil Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, UK. christopher.quince@glasgow.ac.uk|Department of Civil Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, UK. christopher.quince@glasgow.ac.uk