Evaluation on influences of inertial mass on seismic responses and structure-soil interactions of pile-soil-piers

This research is to assess the influences of inertial mass from girder on dynamic characteristic, response, and structure-soil interaction a pile-soil-pier subsystem in scale-model cable-stayed bridge. Therefore, both connection configurations between girder, including sliding fixed connections, were designed present various superstructure delivered pile-soil-pier. The supported by 3 × pile-group mixed soil placed shear box was tested using shaking tables. characteristics, seismic responses, interactions, pile group effects connections analyzed under three input motions with different amplitudes. These results showed that more significantly increased reinforcement strain bending moment at column bottom top, displacement effects, due changing connection. increment noticeably decreased peak accelerations when subjected However, insignificantly affected free-soil. corresponding kinematic almost unaffected mass. Additionally, evident observed girder. numerical model could approximately reproduce macroscopic responses pile-soil-piers capture typical response variations induced configuration change.