Seismic performance of multi-span continuous reinforced concrete bridges considering flood-induced scour effects

Abstract Flood-induced scours near the pier foundation are an adverse phenomenon that may cause collapse of bridges. However, in seismic design bridges, scour impact is commonly ignored when evaluating response. This study aims to quantify effect flood-induced on nonlinear static and dynamic behaviors typical reinforced concrete For this regard, three-dimensional finite element models two- three-span bridges with a multi-cell box girder, circular column bent, extended pile-shaft first developed, where bent modeled considering material geometry nonlinearity. The interaction between soil structure also accounted for by using spring models. By different depths, modal, pushover, time-history analyses both directions investigated. It observed from modal analysis fundamental periods increase depth. In addition, results terms drift ratio show damage which transfers foundation. findings exhibit significant bridges; therefore, it recommended should be considered bridge design.