Research on the aseismic behavior of long-span cable-stayed bridge with damping effect

longitudinal displacement subject to earthquake effect. Thus, seismic control and isolation are
crucial to bridge safety. This paper takes Huai’an Bridge, which has elastic coupling devices and
viscous dampers set at the joint of the tower and the beam, as the research background. Its finite
element model is established, and the elastic stiffness of elastic coupling devices and damper
parameters are analyzed. Viscous damper and elastic coupling devices are simulated using
Maxwell model and spring elements, and their damping effects are analyzed and compared
through structural dynamic time-history analysis. Results show that viscous damper and elastic
coupling device furnished at the joint of tower and beam of a cable-stayed bridge tower beam can
effectively reduce the longitudinal displacement of the key part of the construction subject to
earthquake effect, perfect the internal force distribution, and improve the aseismic performance.
Between the two, viscous damper has better damping effects.