1. Assistant Professor, School of Architecture, Soongsil Univ., Sangdo-dong, Dongjak-gu, Seoul 156-743, South Korea.
2. Associate Professor and Regents’ Lecturer, Dept. of Civil Engineering, Centennial Engineering Center, Univ. of New Mexico, MSC01 1070, Albuquerque, NM 87131 (corresponding author).
3. Senior Lecturer, Centre for Infrastructure Performance and Reliability, School of Engineering, Univ. of Newcastle, University Dr., Callaghan, NSW 2308, Australia.
4. Structural Engineer, HalcrowYolles, Calgary, AB, Canada.
5. Killam Memorial Research Chair, Dept. of Civil Engineering, Univ. of Calgary, Calgary, AB, Canada T2N 1N4.