Effects of different types of entrances on natural ventilation in a subway station

Ya-Nan, Liu; Hu, Yuxiang; Xiao, Yimin; Chen, Jianli; Huang, Haiyu

doi:10.1016/j.tust.2020.103578

Cited by 23 publications

(3 citation statements)

References 45 publications

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“…The design of the entrances, including their aesthetic and architectural characteristics, is key to creating a welcoming atmosphere for passengers [5]. The orientation of the entrances affects passenger flow and station accessibility, as well as lighting and ventilation [19]. The size of the portal, or entrance and exit dimensions, directly impacts congestion levels and passenger throughput [20].…”

Section: Investigating Potential Influencers On Passenger Satisfactio...mentioning

confidence: 99%

Prioritizing Subway Station Entrance Attributes to Optimize Passenger Satisfaction in Cold Climate Zones: Integrating Gradient Boosting Decision Trees with Asymmetric Impact-Performance Analysis

Ji,

Du,

2023

Buildings

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Subway station entrances serve as crucial links between urban environments and underground transit systems and are particularly vital in cities with cold climates. Specialized design strategies are essential to address user needs and promote safety and comfort, thereby encouraging sustainable travel in harsh winter conditions. This research utilizes data from Harbin and Shenyang, two winter cities in China, to explore the nonlinear influences of subway entrance attributes on passenger satisfaction through the combined use of gradient-boosting decision trees and asymmetric impact-performance analysis. The findings indicate that most key attributes of subway entrances impact passenger satisfaction asymmetrically, highlighting the significance of their hierarchical importance in generating satisfaction. These attributes are categorized into frustrators, dissatisfiers, hybrids, satisfiers, and delighters, based on their asymmetry levels. Considering the current performance of these attributes, the study identifies priority for improvement at Harbin and Shenyang’s subway entrances. This aids urban designers and city managers in making informed decisions for urban development and enhancing the overall commuter experience in winter cities.

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Section: Investigating Potential Influencers On Passenger Satisfactio...mentioning

confidence: 99%

Prioritizing Subway Station Entrance Attributes to Optimize Passenger Satisfaction in Cold Climate Zones: Integrating Gradient Boosting Decision Trees with Asymmetric Impact-Performance Analysis

Ji,

Du,

2023

Buildings

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“…Zero, one, two, three, and four equation models are contained in the eddy viscosity models. Among these models, the two-equation models, which entail k-ω and k-ε models, are the commonest models used for the application of natural ventilation [81][82][83][84]. The most well-known equation models in the applications of wind-driven natural ventilation are the standard k-ε model and the RNG k-ε model as the subgroup of the k-ε model and the standard k-ω model and the shear-stress transport (SST) k-ω as the subgroup of the k-ω model.…”

Section: Turbulence Modelsmentioning

confidence: 99%

A Review of Numerical Simulation as a Precedence Method for Prediction and Evaluation of Building Ventilation Performance

2021

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Natural ventilation has been used widely in buildings to deliver a healthy and comfortable indoor environment for occupants. It also reduces the consumption of energy in the built environment and dilutes the concentration of carbon dioxide. Various methods and techniques have been used to evaluate and predict indoor airspeed and patterns in buildings. However, few studies have been implemented to investigate the relevant methods and tools for the evaluation of ventilation performance in indoor and outdoor spaces. The current study aims to review available methods, identifying reliable ones to apply in future research. This study investigates scientific databases and compares the advantages and drawbacks of methods including analytical models, empirical models, zonal models, and CFD models. The findings indicated the computational fluid dynamics (CFD) model is the most relevant method because of cost-effectiveness, informative technique, and proficiency to predict air velocity patterns and ratios in buildings. Finally, widely used CFD codes and tools are compared considering previous studies. It is concluded the application of codes for research is subject to the complexity and characteristics of a studied model, the area and field of study, the desired turbulence model, and the user interface.

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“…Ou [13] compared the analysis method of an entrance structure in a subway station using a 2D plane model and 3D space models, and the results showed that the corners of an entrance structure should be enhanced. Liu et al [14] analyzed the pressure distribution of the horizontal entrance of a subway station, which was caused by airflow. Yang and Lin [15] introduced a prefabricated ring frame structure of an entrance and exit in a prefabricated underground metro station structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Entrance Frame on Crack Development around Prefabricated Subway Station Openings

Feng

Guan

et al. 2023

Buildings

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The openings at the sidewalls of subway station entrances generally reduce the localized load-bearing capacity of the sidewalls and lead to concentrated stress around the openings. In this study, to strengthen the sidewalls with openings in a newly-developed prefabricated subway station, a prefabricated steel-reinforced concrete (SRC) frame around the entrance was developed. To further investigate the effect of the developed entrance frame on the mechanical behavior of the sidewalls, a monotonic static test and finite element analysis were performed on a 1/2 scale station entrance substructure, including the proposed entrance frame and the adjacent top slab, bottom slab, and sidewalls. It was found that the developed entrance frame could effectively prevent stress concentration in the adjacent sidewall region. The most severe crack development was concentrated at the corner of the opening, which could be attributed to the torsional moment at the SRC beam end. The ratio of the torque shared by the beam to the total bending moment of the slab end varied from 21.2% to 26.8% in the elastic stage of all cases. In addition, both the improvement in the torsional bearing capacity of the SRC beam and the out-of-plane flexural capacity of the SRC column could positively contribute to controlling the crack development around the opening.

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Effects of different types of entrances on natural ventilation in a subway station

Cited by 23 publications

References 45 publications

Prioritizing Subway Station Entrance Attributes to Optimize Passenger Satisfaction in Cold Climate Zones: Integrating Gradient Boosting Decision Trees with Asymmetric Impact-Performance Analysis

Prioritizing Subway Station Entrance Attributes to Optimize Passenger Satisfaction in Cold Climate Zones: Integrating Gradient Boosting Decision Trees with Asymmetric Impact-Performance Analysis

A Review of Numerical Simulation as a Precedence Method for Prediction and Evaluation of Building Ventilation Performance

Effect of Entrance Frame on Crack Development around Prefabricated Subway Station Openings

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