1. Assistant Professor, Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea (corresponding author).
2. Senior Researcher, Construction Technology Research Team, Research and Engineering Division, POSCO Engineering and Construction Co. Ltd., Hwaseong, Kyeonggi-do 445-810, Korea.
3. Senior Researcher, Ocean Development System Research Division, Korea Research Institute of Ships and Ocean Engineering, P.O. Box 23, Yuseong-gu, Daejeon 305-600, Korea.
4. Professor Emeritus, Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea.