1. Head of Department, Dept. of Civil Engineering, CIIT Abbottabad Campus, University Rd., Tobe Camp, Abbottabad 22060, Pakistan (corresponding author).
2. Assistant Professor, Faculty of Civil Engineering and Geosciences, Delft Univ. of Technology, Stevinweg 1, Delft 2628CN, Netherlands.
3. Associate Professor, Dept. of Civil Engineering, CIIT Abbottabad Campus, University Rd., Tobe Camp, Abbottabad 22060, Pakistan.