1. Reader in Computational Structural Mechanics, Dept. of Civil and Environmental Engineering, Imperial College, London SW7 2AZ, U.K.
2. Postdoctoral Research Associate, Dept. of Civil and Environmental Engineering, Imperial College, London SW7 2AZ, U.K.
3. Reader in Engineering Structures, Dept. of Civil and Environmental Engineering, Imperial College, London SW7 2AZ, U.K.