1. Professor, Dept. of Civil and Construction Engineering, National Taiwan Univ. of Science and Technology, Taipei 10607, Taiwan, R.O.C.
2. Doctoral Program Student, Dept. of Civil and Construction Engineering, National Taiwan Univ. of Science and Technology, Taipei 10607, Taiwan, R.O.C. (corresponding author).
3. Master Student, Dept. of Civil and Construction Engineering, National Taiwan Univ. of Science and Technology, Taipei 10607, Taiwan, R.O.C.