Comparative Performance of Isolation Systems for Benchmark Cable-stayed Bridge

摘要: Earthquake response of benchmark cable-stayed bridge with different isolation sys- tems is investigated. The selected system consists high damping rubber bearing (HDRB), lead-rubber (LRB), friction pendulum (FPS) and resilient-friction base isolator (R-FBI). Considering the phase-I problem, ground acceleration only applied in longitudinal direction acting simultaneously at all supports. seismic obtained by solving governing equations motion Newmark's step-by-step integration method. A comparative performance study among se- lected isolators for control carried out. parametric in- vestigating effectiveness also performed variation important parameters. Varying parameters isolators, evaluation criteria cable stayed problem are found Significant reduction shear, overturning moment other responses observed using systems isolator. Comparing it that LRB R-FBI better than HDRB FPS. Further, increase ratio reduces both device displacement shear LRB. effects iso- lation period on structure depend as well type input earthquake motion.