1. Civil Engineering Department, Kuwait University, P.O. Box-5969, 13060, Safat, Kuwait E-mail: A.Alsulaili@ku.edu.kw
2. Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, 1 University Station, C1786, Austin TX 78712, USA E-mail: speitel@mail.utexas.edu; lynnkatz@mail.utexas.edu