Seismic reliability assessment of base-isolated bridges in Quebec

The aim of this work is to estimate the seismic reliability a simple typical two-span lifeline base-isolated bridge designed behave essentially elastic or as per Canadian Highway Bridge Design Code, for seven localities in Quebec. Two limit states are considered possible failure due unacceptable damage: flexure at pier-base and displacement within isolation systems (SIS). main problem random variables modeled hazard, temperature, pier base dimensions, material mechanical properties. Monte Carlo method was used evaluate probability each state. Preliminary results reveal that notwithstanding large temperature hazard variabilities between sites Quebec, global indices almost uniform, approximately 3.45 ± 0.02. Furthermore, security factor (i.e., 1.25) on SIS capacity not levelled with flexural requires further examination consideration.