Calculation And Simulation On Capacity Of Stairs In Urban Rail Transit Hub Station

With the advantages of great volume, high efficiency and low pollution, urban rail transit has become the first choice of many cities to solve traffic problems. Due to high crowd density, urban rail transit hub is characterized by severe jam and security issues. It is crucial to design facilities reasonably and improve service levels and operational efficiency. Stairs are the bottleneck of the pedestrian evacuation. The planning, design, and layout of the stairs have great importance to improve the efficiency of urban rail transit passenger flow organization. For this reason, the paper makes the following specific work:Firstly, this paper researches the passengers characteristics and physical properties of the stairs deeply which affect the capacity of the stairs, and analyzes the behaviors of passengers with luggages and passengers walking together, then studies the characteristics of the individual passengers, passenger traffic parameters and passenger flow, which prepare for the data collection of Chapter â…¢ below.Secondly, this paper researches deeply the characteristics of upstairs and downstairs and different functional stairs, and analyzes the speed of passenger flow on stairs, then, through the analysis of traffic characteristic data, the individual characteristics are obtained, including gender, age, speed especially the speeds of passengers with luggages and the passengers walking together, which is the main basis for the calibration of the model parameters. Further, this paper analyzes the traffic characteristics and establishes the relationship model of flow-density, and gets the capacity of staircase based on actual survey data.Then, this paper introduces the basic principle of social force model. Anylogic simulation model is established, and the model parameters calibrated based on actual survey data, then the validity of the parameter calibration is verified through self-organization calibration and the behaviors of passengers carrying baggage and passengers walking together are realized.Finally, by comparing the capacity of stairs under different scenarios, the paper finds that small reverse flow will reduce the capacity of stairs by nearly half when passengers go upstairs. Dividing stair into two columns can effectively improve the capacity of the stairs; and the capacity increases quite slowly with the step width increases, which indicates that there is a certain influence on the capacity of the stairs from step width, but the effect is not obvious. The presence of passengers carrying luggages and passengers walking together will reduce the capacity of the stairs to some extent.