Ride quality of trains moving on Shanghai Yangtze River Bridge considering effect of multiple loads(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2019年03期
- Page:
- 65-73
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Ride quality of trains moving on Shanghai Yangtze River Bridge considering effect of multiple loads
- Author(s):
- WU Dingjun; CHEN Rui; LI Qi
- (Department of Bridge Engineering, Tongji University, Shanghai 200092, China)
- Keywords:
- bridge engineering; windvehiclebridge system; coupled vibration; ride quality; cablestayed bridge; mode superposition method; random traffic flow
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to investigate the ride quality of trains moving on the Shanghai Yangtze River Bridge subjected to multiple environmental loads, the wind, road irregularity, temperature, highway and railway loads were taken into account in the windvehiclebridge coupled system. Finite element models of the bridge, railway vehicles, and the different types of highway vehicles were developed and their modal results were then extracted for the vehiclebridge dynamic interaction analysis using the mode superposition method. A random traffic flow model was applied to simulate the highway traffic flow, the test aerodynamic parameters of the train and bridge reported in other literature were used. The deformation of the bridge induced by annual temperature variation was added to the random irregularities of the rail and road. The selfcomplied vehiclebridge coupling software VBC was used to calculate the responses of the windvehiclebridge dynamic interaction system. The effect of temperature load, highway vehicle types, train operation mode, with wind load or not, and train operation modes with respect to the wind direction were considered. The effects of extreme load combinations were investigated by considering the situations of trains with empty, capacity, and full passenger loads. Based on calculations at different train speeds and wind speeds, it was found that the lateral forces of the wheelsets control the ride quality of train. The guidelines for the safe and comfortable operation of the train were proposed. The results show that the annual temperature variation load and highway traffic flows have negligible effect on the ride quality of the trains. The dynamic responses of the trains increase with an increase in the train and wind speeds. The mode of operation relative to the direction of wind of the trains also has a significant effect on the ride quality of the trains. At high wind speeds, a single train traversing on the windward side is the most unfavorable operation mode, when the wind speed is less than 20 m/s, the maximum allowable operation speed can reach 90 km/h. When the wind speed is more than 20 m/s, the operation speed should be less than 70 km/h. And when the wind speed exceeds 25 m/s, the rail traffic should be closed. 5 tabs, 19 figs, 35 refs.
Last Update: 2019-05-23