A kind of vehicle-flexible bridge vertical interaction model based on deformed configuration
XIAO Xiang1,2, REN Wei-xin1,2
1. School of Civil Engineering and Architecture, Central South University, Changsha Hunan 410075, China;2. High-speed Railway Construction Technology National Engineering Laboratory, Changsha Hunan 410075, China
Abstract：Based on the deformed configuration of bridge with vehicle-bridge vibration, a vehicle-bridge interacted model which considers the deformation of bridge is established. Movement of vehicle is decomposed to rigid motion along the bridge deck and the vibration in local vehicle system, just like the seismic analysis of bridges. Taking simply supported bridge subjected to a one-axle vehicle for example, the vertical motion equation of vehicle-bridge system is established, which can better reflect the operation characteristics of vehicles running on the bridge. The numerical example about the effect of bridge deformation was give out, and analysis of the effect of deflection-span ratio and vehicle speed has been studied.
2013, Vol. 32 
