1. Professor, Department of Civil Engineering, National Cheng Kung Univ., Tainan 701, TW.
2. Ph.D. Student, Department of Civil Engineering, National Cheng Kung Univ., Tainan 701, TW.
3. Associate Professor, Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, Taipei 106, TW.
4. Graduate Student, Department of Civil Engineering, National Cheng Kung Univ., Tainan 701, TW.