1. PhD, Lecturer, Dept. of Civil and Building Engineering, Loughborough Univ., Leicestershire, LE11 3TU, U.K. (corresponding author).
2. PhD, Research Associate, Dept. of Civil and Building Engineering, Loughborough Univ., Leicestershire LE11 3TU, U.K.
3. PhD, Lecturer, Scott Sutherland School, The Robert Gordon Univ., Garthdee Rd., Aberdeen AB10 7QB, U.K.