1. Dept. of Civil and Environmental Engineering, Faculty of Engineering, Mahidol Univ., 999 Phuttamonthon 4 Rd., Phutthamonthon, Nakhon Pathom 73170, Thailand (corresponding author).
2. Dept. of Civil and Environmental Engineering, Faculty of Engineering, Mahidol Univ., 999 Phuttamonthon 4 Rd., Phutthamonthon, Nakhon Pathom 73170, Thailand.
3. Dept. of Civil Engineering, Faculty of Engineering, Chulalongkorn Univ., 254 Phayathai Rd., Wang Mai, Pathum Wan, Bangkok 10330, Thailand.