STUDY ON INFLUENCE OF CONNECTION STATUS OF WATERWAY AND PIERS ON SEISMIC RESPONSE OF AQUEDUCT BRIDGE

Abstract

 Seismic responses of aqueduct bridge were investigated by three dimensional dynamic analysis for the purpose of improving accuracy and reliability of seismic performance verification of aqueduct bridge. In this study, two models, or a continuous model and a discontinuous model were set, and comparative analyses were made. As the results, in the continuous model, seismic stresses increased in the waterway. In the discontinuous model, the seismic stresses increased at the base of piers, but decreased in the waterway due to the stress relief by the opening and sliding of connecting surfaces. In addition, large opening displacement occurred at the connecting surfaces between waterways. In order to accurately evaluate the seismic performance of aqueduct bridge, it is necessary to quantitatively evaluate the possibility of falling of aqueducts and collapse of piers. For this purpose, an analytical evaluation based on three dimensional dynamic analysis taking the influence of discontinuous behaviors of connecting surfaces into account is necessary.