1. Associate Professor, Dept. of Civil Engineering, Faculty of Engineering, Kasetsart Univ., 50 Ngamwongwan Rd., Lad Yao, Chatuchak, Bangkok 10900, Thailand.
2. Assistant Professor, Faculty of Architecture, Kasetsart Univ., 50 Ngamwongwan Rd., Lad Yao, Chatuchak, Bangkok 10900, Thailand.
3. Researcher, Dept. of Civil Engineering, Faculty of Engineering, Kasetsart Univ., 50 Ngamwongwan Rd., Lad Yao, Chatuchak, Bangkok 10900, Thailand.
4. Associate Professor, Dept. of Civil Engineering, Faculty of Engineering, Kasetsart Univ., 50 Ngamwongwam Rd., Lad Yao, Chatuchak, Bangkok 10900, Thailand (corresponding author).