Influence of Central Buckle on Dynamic Behavior of Long-Span Suspension Bridge

A 3-D finite element model for Runyang Yangtze Highway Nancha Suspension Bridge was established with ANSYS software,on the basis of which self-vibration behavior analysis was carried out using subspace iteration method.The multi-accuracy simulation technique of the central buckle and influence of the central buckle on dynamic behavior of the long-span suspension bridge were particularly studied.Results show that different accuracy simulation of central buckle has a little influence on dynamic behavior of the bridge;compared with short hanger cable at mid-span,the structural rigidity is raised and the natural frequencies increase by use of central buckle,but various types of vibration modes are affected in different extents;among all of these vibration modes,the cable-related modes are most obviously affected.The results obtained in this paper provide essential information and research basis for health monitoring of the bridge.