The microscopic characteristics of escape behaviours from a three-dimensional lecture theatre under conditions of good and zero visibility

Zhao, Yongxiang; Lu, Tuantuan; Li, Meifang; Wu, Peng

doi:10.1016/j.ssci.2019.05.054

Cited by 13 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No casualties, the cause of the fire was that the high temperature produced by the light source ignited the curtain Benisuviv Theatre, Egyptdimensional lecture hall under conditions of good visibility as well as zero visibility [43], revealing the difference between evacuation behavior under zero visibility and normal lighting conditions. On this basis, a three-dimensional social force model is proposed.…”

Section: Yearmentioning

confidence: 99%

Numerical Study on Evacuation Evaluation and Strategy of Theater with Rotating Auditorium

et al. 2022

View full text Add to dashboard Cite

In recent years, more and more theaters with rotating mechanisms have been built and used, such as theaters with rotating auditoriums. The rotation mechanism in this type of building may lead to the uncertainty of evacuation distances and routes, which undoubtedly poses a higher challenge to performance-based fire protection design. Taking the revolving auditorium theater as an example, this paper proposes a systematic method to solve the problem of randomness in evacuation scenarios. The numerical simulations based on FDS and Pathfinder were carried out, and two improved evacuation strategies for theaters with rotating auditorium were proposed. The results show that the blockage of evacuation exits is an important factor affecting the success of evacuation and the evacuation time. In addition, the establishment of emergency evacuation stairs and rotating auditoriums can effectively reduce the evacuation time.

show abstract

Section: Yearmentioning

confidence: 99%

Numerical Study on Evacuation Evaluation and Strategy of Theater with Rotating Auditorium

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The black dots in figure 4 show the trajectories of the head of a pedestrian in real space of measurement area, which are transformed by the DLT method. We can see that the trajectories of the pedestrian are actually not straight lines but a succession of fluctuating curves that are caused by the biomechanical features of human [40,41]. However, it can be found that the original trajectories include some noise that is related with indefinite head movement, therefore, the original trajectories need to be smoothed.…”

Section: Experimental Trajectories Extractionmentioning

confidence: 99%

Dynamic analysis of single-file pedestrian movement with maintaining social distancing in times of pandemic

Lu¹,

Zhao²,

Wu³

et al. 2021

J. Stat. Mech.

Self Cite

View full text Add to dashboard Cite

In order to uncover the characteristics of pedestrian movement under different social distancing measures, we performed a series of single-file experiments considering two types of social distancing measures, namely 1 m and 2 m, and compared them with normal experiments conducted before Covid-19. Firstly, the findings indicate that social distancing measures do make pedestrians keep a greater distance, but there are social distance violations. When the density is greater than 0.23 m−1, pedestrians have more violations under the measure of 2 m than that of 1 m at the same density. Although the typical stop-and-go wave is still observed in social distancing experiments, the increase in social distancing causes pedestrian stopping behavior to occur at lower density, and shortens the density range of the transition from free flow to jammed flow. Moreover, the headway-speed relation under social distancing measures is not a simple horizontal displacement of that under normal conditions. Although their free speeds are similar, the increase in social distancing makes pedestrians need longer adaption time and more space to transform the motion state. Finally, fundamental diagrams are obtained, and the maximum specific flows for social distancing of 1 m and 2 m is 0.62 s−1 and 0.53 s−1, respectively. Apart from the comparison with normal conditions, the comparison with the two-dimensional social distancing experiments shows that pedestrians are more able to comply with the prescribed social distance and stop less in single-file movement. These enrichments offer empirical data of pedestrian movement under different social distancing measures and benefit pedestrian modeling during pandemics.

show abstract

“…Hu et al [3] proposed a three-dimensional cellular automata evacuation model taking into account the movements of pedestrians on stairs and studied the effect of paired behavior on evacuation efficiency. Zhao et al [4] investigated the microscopic characteristics of pedestrian evacuation in a threedimensional lecture theater under conditions of good and zero visibility, including lateral and vertical oscillations, route choice, evacuation direction, and following behavior. They proposed a three-dimensional social force model introducing two lateral and vertical oscillation forces.…”

Section: Related Workmentioning

confidence: 99%

“…Thus, understanding the movement of pedestrians on outdoor seatless terraced stands is greatly significant for building safety and event management. Existing studies on crowd evacuation in three-dimensional environments have mostly focused on stairs and terrace classrooms [1][2][3][4]. In these scenarios, however, evacuation route are relatively fixed.…”

Section: Introductionmentioning

confidence: 99%

Potential-based three-dimensional route choice model for pedestrian evacuation on terraced stands

Liu¹,

Du²,

Sun³

2021

J. Stat. Mech.

View full text Add to dashboard Cite

This study proposes a potential-based three-dimensional cellular automata model to describe the route choice behavior of pedestrians while evacuating terraced stands. The model takes into account the pedestrians’ states of sitting, standing, and moving, and the possible transitions on terraced stands. The proposed potential field algorithm reflects the influence on route choice behavior of heterogeneous heights, route distance, pedestrian congestion, and route capacity. Three parameters related to the pedestrians’ behaviors in the spaces with heterogeneous heights are then analyzed to demonstrate the ability of the model to reproduce pedestrian route choice behaviors on terraced stands. Finally, empirical data observed in a terraced stand of a stadium are applied for further validation. The results show that the proposed model performs consistently well with the observed data.

show abstract

The microscopic characteristics of escape behaviours from a three-dimensional lecture theatre under conditions of good and zero visibility

Cited by 13 publications

References 50 publications

Numerical Study on Evacuation Evaluation and Strategy of Theater with Rotating Auditorium

Numerical Study on Evacuation Evaluation and Strategy of Theater with Rotating Auditorium

Dynamic analysis of single-file pedestrian movement with maintaining social distancing in times of pandemic

Potential-based three-dimensional route choice model for pedestrian evacuation on terraced stands

Contact Info

Product

Resources

About