1. Lecturer, Dept. of Civil Engineering, Rajamagala Univ. of Technology Isan, 744 Suranarai Rd., Muang District, Nakhon Ratchasima 30000, Thailand.
2. Professor and Chair, School of Civil Engineering, Suranaree Univ. of Technology, 111 University Ave., Muang District, Nakhon Ratchasima 30000, Thailand.
3. Postgraduate Researcher, School of Civil Engineering, Suranaree Univ. of Technology, 111 University Ave., Muang District, Nakhon Ratchasima 30000, Thailand.
4. Associate Professor, School of Civil Engineering, Suranaree Univ. of Technology, 111 University Ave., Muang District, Nakhon Ratchasima 30000, Thailand (corresponding author).