Abstract:
The earthquake effects on cable-stayed bridges isolated by single concave friction
pendulum (SCFP) are investigated in this study. Reducing ways of the destructive earthquake
effects are getting vital important for researchers and engineers. One of the most accepted ways
for reducing the effects of earthquake is using seismic isolation systems. The result obtained
from an analytical study on the seismic responses of Manavgat Cable-Stayed Bridge with and
without seismic isolation system are compared each other. The selected bridge is the first
cable-stayed bridge of Turkey and has 202m length between its side supports. In order to
determine the contributions of isolation systems to the bridge dynamic behavior, 3D finite
element model (FEM) of the bridge is created in Sap2000 [1]. Time history analysis is
performed for 3D FEM. Three different earthquake ground motions having transverse and
longitudinal directions are used in analyses. Comparison of dynamic behavior of the bridge
with and without the SCFP systems under three different earthquake motions has been
conducted. The results obtained from analyses of the bridge are presented by graphics and
tables in detail. It is seen that using of isolation system reduces the destructive effects of
earthquakes on the bridge.
