1. Department of Civil Engineering, University of Santo Tomas, España Blvd, Sampaloc, Manila 1008, Metro Manila, Philippines
2. Department of Civil and Environmental Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
3. Woodfields Consultants, Inc., 153 Kamias Road Extension, Kamias 1102, Kamias Rd, Diliman, Quezon City 1102, Metro Manila, Philippines