1. Senior Researcher, Facilities and Assets Management Center for Infrastructures, National Taiwan Univ. of Science and Technology, Taipei, Taiwan 10607 (corresponding author).
2. Professor, Dept. of Construction Engineering, National Taiwan Univ. of Science and Technology, Taipei, Taiwan 10607.
3. Graduate Student, Dept. of Civil Engineering, National Cheng Kung Univ., Tainan, Taiwan 70101.
4. Graduate Student, Dept. of Construction Engineering, National Taiwan Univ. of Science and Technology, Taipei, Taiwan 10607.
5. Managing Director, Geotechnical Engineering Research Center, Sinotech Engineering Consultants Inc., 171 Nanking E. Rd., Taipei, Taiwan 10507.
6. Research Fellow, Geotechnical Engineering Research Center, Sinotech Engineering Consultants Inc., 171 Nanking E. Rd., Taipei, Taiwan 10507.