Abstract
Secondary systems of the highway bridges such as lighting poles and information poles should resist the level-1 earthquake to acquire the serviceability of the traffic lifeline. This paper studied the bridge-lighting pole interaction during the level-1 earthquake using a precise FEM model. First, the modal analysis showed that the opening at the middle of the pole to house the electric device inside the pole reduced the twisting stiffness of the pole. Then, the earthquake response analysis showed that the precise FEM model verified the stress concentration at the opening corner. The response of the lighting pole was amplified more than 10 times because of the resonance with the bridge. Further, the effect of the mass ratio of the lighting pole and the bridge was evaluated using a two-degree-of-freedom system.
