RISK MITIGATION EFFECT OF FUNCTION SEPARATED BRIDGES UNDER DESIGN LIMITATION EXCEEDED EARTHQUAKES

Abstract

 In resent years, Earthquakes and according disasters are considered as wakeup call to earthquake engineers to consider the probability of the earthquakes exceeding design limitation and the corresponding structural damage. Anti-Catastrophe have been discussed and Function Separated Bridge, using multiple energy dissipation and isolation devices, is proposed to separate the risk from damage of critical member. In this study, Incremental Dynamic Analysis and earthquake risk assessment are conducted for Function Separated Bridge. It is found that broken of SPD first and then HDR is the most probable fail scenario for the Function Separated Bridges due to all kinds of earthquakes. According to the earthquake risk assessment, the risk of Function Separated Bridges is about half of the convenient isolated bridge.