1. Dept. of Civil Engineering, Chittagong Univ. of Engineering and Technology, Chittagong 4349, Bangladesh; and School of the Built Environment, Heriot-Watt Univ., Edinburgh EH14 4AS, UK (corresponding author).
2. Institute for Infrastructure and Environment, Heriot-Watt Univ., Edinburgh EH14 4AS, UK.
3. School of Engineering, Univ. of Edinburgh, Edinburgh EH9 3JL, UK.