Seismic Performance of Column-to-drilled-shaft Connections
In order to deeply reveal the force transmission and damage mechanism of column-to-drilled-shaft connections,detailed finite element simulation of exist experimental test was conducted,and force transmission and damage mechanism were analyzed.After verification of finite element models,the effect of shear-span ratio,embedment depth,connection diameter-to-column diameter ratio and pile transverse reinforcement ratio on seismic performance of column-to-drilled-shaft connections was studied by numerical simulation.Results indicate that proposed finite element models can adequately replicate the mechanical behavior of column-to-drilled-shaft connection.The damage of connection region is presented as pile stirrup yielding induced by horizontal compression from embedment pier segment.Additionally,the connection strength increases with the increasing of shear-span ratio,connection diameter-to-column diameter ratio,embedment depth and pile transverse reinforcement ratio.
column-shaft bridge piersocket connectionnumerical simulationdamage mechanismparametric study
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