1. Ph.D. Student, Dept. of Civil Engineering, National Chung Hsing Univ., Taichung, Taiwan.
2. Associate Professor, Dept. of Civil Engineering, National Chung Hsing Univ., Taichung, Taiwan.
3. Assistant Professor, Dept. of Construction Engineering, Chaoyang Univ. of Technology, Taichung, Taiwan (corresponding author).
4. Assistant Professor, Dept. of Construction Engineering, Chaoyang Univ. of Technology, Taichung, Taiwan.
5. Professor, Dept. of Construction Engineering, Chaoyang Univ. of Technology, Taichung, Taiwan.