Abstract
The 2011 Great East Japan earthquake and 2016 Kumamoto earthquake triggered discussion about more practical concept for seismic design assuming very intense seismic action. One of such concepts is referred to as a redundancy. In this study, reliability-based seismic design methodology for bridge pile foundation is developed taking into consideration the difference of redundancy. Redundancy depends on the longitudinal or transverse number of pile foundation. In an illustrative example, partial factors to consider the difference of redundancy and to ensure the target seismic reliability for bridge under uncertainty are determined based on Monte Carlo simulation. Proposed partial factors can provide motivation to design the bridge with high redundancy.
