1. Professor, Dept. of Civil Engineering, National Chung-Hsing of Univ.
2. Assistant Professor, Dept. of Civil Engineering, Dahan Institute of Technology, 1 Shuren St., Dahan, Shincheng, Hualien 97145, Taiwan, Republic of China (corresponding author).
3. Associate Professor, Dept. of Civil Engineering and Engineering Informatics, Cheng-Shiu Univ.