1. Professor, Dept. of Civil and Ecological Engineering, I-shou Univ., No. 1, Sec. 1, Syuecheng Rd., Dashu Township, Kaohsiung County 84008, Taiwan (corresponding author). E-mail: dflin@isu.edu.tw
2. Professor, Dept. of Civil and Ecological Engineering, I-shou Univ., No. 1, Sec. 1, Syuecheng Rd., Dashu Township, Kaohsiung County 84008, Taiwan.
3. Master, Dept. of Civil and Ecological Engineering, I-shou Univ., No. 1, Sec. 1, Syuecheng Rd., Dashu Township, Kaohsiung County 84008, Taiwan.