Interaction of cable-stayed bridge and foundation under earthquake

The design and analysis of cable-stayed bridges requires complex modeling and overview. Cable bridges actually have their own unique load transfer mechanism and must be accurately modeled by the finite element model. In the following paper, a cable bridge in sap2000 is first examined and then a finite element model in Abacus 2020 is prepared from it. The cable-stayed bridge is made of concrete and has steel cables. This bridge has three spans with lengths of 37.1, 31.7 and 74.2 meters. In this model, a pylon with dimensions of 3 meters by 3 meters is used and there is also a concrete deck with a width of 30 meters. This paper attempts to apply the El Centro earthquake, which occurred in the United States in 1940, to the model. To apply this earthquake, the acceleration of El Centro earthquake was applied under the foundation and the interaction of the foundation and the bridge under this earthquake has been investigated. This type of analysis was based on time history and we applied the first 14 seconds of this earthquake under the foundation. The results show that the acceleration changes, of course, due to the dynamic loading, which is significant from 5.6 seconds onwards