Optimum Location of Seismic Isolation for Manavgat Cable-Stayed Bridge

Abstract

Seismic isolation strategies have been extensively implemented to mitigate the risk of damage in cable-stayed bridges (CSBs). The effectiveness of seismic isolation has received a great deal of attention from a number of researchers. This paper focuses on studying the seismic performance of a single pylon cable-stayed bridge with a single concave friction pendulum (SCFP) at various locations under bi-directional seismic excitations. A 3D numerical model was created using the prototype of a single pylon cable-stayed bridge located in Antalya, Turkey in order to study its seismic response. SCFP was installed at the bridge’s deck-abutment, deck-pylon and pylon-foundation connection to study the reduction of the dynamic response when subjected to various seismic excitations. The efficiency of SCFP is evaluated by monitoring and controlling the displacement of the deck, acceleration, and the base of the pylon. The analytical results indicate that SCFP can effectively diminish both the base shear and the displacement of the pylon. However, the effectiveness of SCFP is significantly influenced by its location and ground motion.