Abstract
In recent decades, the demand for complex and economical engineering structures with great aesthetics has been on the rise and the cable stayed bridges also take their share of this interest. Besides many advantages cable-stayed bridges are quite flexible, hence susceptible mainly to dynamic actions such as impact loads, wind effects and seismic excitations. In this context, this study focused on the effect of A and H shape reinforced concrete pylons on the seismic behavior of a long span steel triple box-girder cable-stayed bridge that was presumed to be located in an earthquake-prone region in Turkey. The 3D models of the bridge were constructed using SAP2000 software and the time history analysis have been carried out considering cable sag, large displacement effects. The seismic responses of the bridges are compared in terms of axial force on cables, deflections on the pylons and the deck
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