1. Associate Professor, Dept. of Civil Engineering, International Univ. of VNU HCM, Ho Chi Minh +0084, Vietnam (corresponding author).
2. Lecturer, Dept. of Civil Engineering, Mien Tay Construction Univ., Ho Chi Minh +0084, Vietnam.
3. Associate Professor, Dept. of Civil Engineering, International Univ. of VNU HCM, Ho Chi Minh +0084, Vietnam.