Research On Evacuation Mode, Escape Efficiency And Capacity Of Seismic About High-Speed Railway Long Bridge In Emergency

With the large-scale building of the high-speed railway in domestic, the train speed enhances all the ways. And the proportion of long-span bridges in the lines is also enhances all the ways. The probability of the train stop emergency increases because of the fire disaster on the trains, debris flow, landslide, and earthquake etc. And it is difficult to rescue the passengers because the bridge is closed. How to ensure the safety of passengers after the accident has become an urgent problem to be solved in the long-span railway bridge.Based on the research of railway bridge accident rescue system, four escape modes are put forward in this paper, such as flexible slide escape model, pier escape model, tower escape model and ladder escape model. Then some corresponding reference for standard design of the escape mode are put forward. And considering the accident probability and the escape efficiency, the length of the escape facilities for long-span bridges can be determined as longer than 6km.More epecially study was made on the ladder escape mode among these modes. And some seismic checking was made on the structures using MIDAS/Civil, in order to test the aseismic performance of the structures. In order to check the model's escape efficiency, ueing the escape time as criteria, the personnel evacuation time(including flexible slide escape model, tower escape model and ladder escape model)was calculated refer to calculation theory on public places (such as subway, high-rise building) accident evacuation. the escape time of ladder is the shortest,it means most efficient. Calculated by analyzing the data obtained the escape efficiency depends on set spacing, the width of escape routes,bridge height of these three factors.