1. Associate Professor, Dept. of Civil Engineering and Engineering Informatics, Cheng-Shiu Univ., No. 840, Chengcing Rd., Niaosong Township, Kaohsiung County 83305, Taiwan (corresponding author).
2. Professor, Dept. of Construction Engineering, Chaoyang Univ. of Technology, 168 Jifong E. Rd., Wufong Township Taichung County 41349, Taiwan.
3. Professor, Dept. of Civil Engineering, National Chung-Hsing Univ., No. 250, Kuo Kuang Rd., Taichung 402, Taiwan.