1. Professor, Department of Civil Engineering, National Cheng Kung University, No. 1, University Road, Tainan, Taiwan 70101, Telephone: +886 6 2757575 ext. 63160, Telefax: +886 6 2358542, E-mail: samhcc@mail.ncku.edu.tw
2. Graduate student, Department of Civil Engineering, National Cheng Kung University, No. 1, University Road, Tainan, Taiwan 70101, Telephone: +886 6 2757575 ext. 63160, Telefax: +886 6 2358542, E-mail: jaykimoj@hotmail.com