1. Professor, Dept. of Civil Engineering, National Taiwan Univ., Taipei 10617, Taiwan (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, Singapore 117576; and Board Member, Taiwan Building Technology Center (TBTC), National Taiwan Univ. of Science and Technology, Taipei 10607, Taiwan.
3. Associate Professor, Dept. of Civil Engineering, National Chi Nan Univ., No.1 University Rd., Puli, Nantou 54561, Taiwan.
4. Senior Researcher, Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Goyang, Gyeonggi 411-712, Republic of Korea; and Associate Professor, Dept. of Geotechnical and Geo-Space Engineering, Univ. of Science and Technology, Goyang, Gyeonggi 411-712, Republic of Korea.