Time-dependent seismic reliability of isolated bridges considering ageing deterioration of lead rubber bearings

Energy Response and Parameter Optimization of Continuous Girder Bridge with Friction Pendulum Bearing

“…The seismic energy response can comprehensively reflect the damage degree of bridge structure induced by seismic excitation. Therefore, the energy response analysis is widely used in the bridge aseismic designs [1] . Seismic isolation design is to set a specific seismic isolation device between the upper and lower structures of the bridge.…”

“…The results shown that the hyperbolic friction pendulum support has the optimal isolation capability. Zhang Changyong [1] et al used MIDAS/CIVIL to analyze the energy response of a three-span concrete continuous beam bridge under different isolation design conditions. The results shown that the increase of sliding radius and friction coefficient within a certain range can improve the damping effect.…”

“…The research can provide a technical support for the isolation design of friction pendulum bearings in high-speed railway bridges. The energy response equation of the isolation bridge system under seismic excitation is shown in formula (1) [1,11] . EK(t) is the kinetic energy of the bridge system, ED(t) is the self-damping energy dissipation of the bridge system, EF(t) is the energy consumption of the isolation device, EP(t) is the potential energy of the bridge system, and EO(t) is the seismic input energy.…”