Abstract
In this study, a dynamic response analysis procedure is proposed and applied to investigate the dynamic responses of a straddle-type concrete-filled steel tube tied arch bridge under train and truck loadings. A numerical model of the coupled monorail train–bridge system is established to investigate the dynamic behaviors of the bridge under moving trains. A refined three-dimensional finite element model is built for the bridge and a 15 degrees-of-freedom vehicle model is presented for the train. The numerical model is validated using in-situ test results and then used to analyze the dynamic displacement and acceleration of the bridge and the trains on the bridge. Based on the simulation results, the impact factor of the bridge is investigated and the riding comfort of the trains is evaluated. The investigation results show that the impact factor of vehicle loads reaches the maximum value when the resonance of the bridge is induced by the moving vehicles. The effect of train braking predominates the longitudinal vibration of the bridge but is negligible in the transverse and vertical directions. The vehicle speed is the dominating factor for the riding comfort of the train.
Highlights
In the last two decades, traffic problems in major cities worldwide presented demands of new transportation systems
The numerical model was used to analyze the vertical displacement, transverse displacement, vertical acceleration, and transverse acceleration of the mid-span section of the bridge, as well as the accelerations of the train in the two loading cases: (1) single line loading: one train running on the track, and (2) double line loading: two trains running on the track
Km/h in Overall, both the single line and double line loading due to in to resonance induced by thespeed moving a slightly greater impact factorcases is achieved single line case, both achieved by the arch rib
Summary
In the last two decades, traffic problems in major cities worldwide presented demands of new transportation systems. Established a model of the vehicle, bridge, and wheel-rail interaction to analyze the dynamic response of a 24-m pre-stressed concrete high-speed railway bridge. Wang et al [26] proposed an analytical procedure of dynamic interaction analysis of the straddle monorail bridge-vehicle coupling system based on the finite element method and energy method. There is a lack of studies on the dynamic responses of this kind of combined bridge subjected to a monorail vehicle load and the riding comfort of the monorail trains. A dynamic response analysis procedure is proposed and applied to investigate the dynamic responses of a straddle-type concrete-filled steel tube tied arch bridge under the train and truck loadings through numerical simulations. The riding comfort of monorail trains is evaluated using the Sperling index based on GB5599-85 [29]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
