1. Assistant Professor, Dept. of Civil Engineering, King Mongkut’s Univ. of Technology Thonburi, Trungkru, Bangkok 10140, Thailand (corresponding author).
2. Former Graduate Student, Dept. of Civil Engineering, King Mongkut’s Univ. of Technology Thonburi, Trungkru, Bangkok 10140, Thailand.
3. Assistant Professor, Dept. of Civil Engineering, King Mongkut’s Univ. of Technology Thonburi, Trungkru, Bangkok 10140, Thailand.
4. Professor, Dept. of Civil Engineering, King Mongkut’s Univ. of Technology Thonburi, Trungkru District, Bangkok 10140, Thailand.