1. School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia
2. Department of Engineering Sciences and Applied Arts, University College of Science and Technology, Khan Younis P.O. Box 8, Palestine
3. School of Civil and Architectural Engineering, Yangtze Normal University, Chongqing 408100, China
4. School of Civil Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia