1. EBP Switzerland, Division of Infrastructure and Transportation, Mühlebachstrasse 11, Zurich 8038, Switzerland.
2. Dept. of Civil Engineering, and Research Center for Hazard Mitigation and Prevention, National Central Univ., Zhongli 32001, Taiwan (corresponding author).
3. Dept. of Civil Engineering & Engineering Mechanics, Columbia Univ., 500 West 120th St., New York, NY 10027.