Parametric Study of Longitudinal Seismic Pounding Response for Long-span Multi-tower Suspension Bridges
Deng Yu-lin1; Peng Tian-bo2; Li Jian-zhong2
1. School of Transportation, Wuhan University of Technology, Wuhan 430063, China; 2. Department of Bridge Engineering, Tongji University, Shanghai 200092, China
Abstract：Abstract: Based on the pounding phenomenon at expansion joints of long-span subjected to longitudinal earthquake and in combination with a realistic engineering project of a long-span multi-tower suspension bridge, the complex nonlinear model that considered the elasto-plastic behaviors of piers and the pound responses between the main span and the approach span was developed. The effects of some pounding parameters such as pounding-stiffness, initial gap at expansion joint were studied. The results indicate that the pounding stiffness is not essential parameter and its effect on pound responses is not obviously. But the initial gap at expansion joint has important effects on pounding effect such as the relative displacement between main span and approach span and the displacement of main girder.
2011, Vol. 30 
