Numerical studies on fire hazards of elevator evacuation in supertall buildings

Cai, Ning; Chow, Wan Ki

doi:10.1177/1420326x17751593

Cited by 18 publications

(6 citation statements)

References 16 publications

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“…Ding et al 21 used a simulation-based optimization method to optimize the evacuation strategy of using stairs considering several typical pedestrians’ walk preferences and elevators on the genetic algorithm in high-rise buildings. Cai and Chow 22 studied numerically a fire safe elevator system for supertall buildings by providing an elevator accessible on each floor level and passing through the refuge place. Aleksandrov et al 10 proposed a method for finding an optimal evacuation strategy for tall buildings enabling people to use the available egress components in an optimal way; considering the stochastic nature of people’s behaviour, modelling the randomness in decision-making of people and the capacities of egress components.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis and validation on the phased evacuation time in high-rise buildings

Wu,

Mizuno,

Park

2023

Indoor and Built Environment

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The main aim of this study is to investigate the numerical analysis of phased evacuation and validate the feasibility of high-rise buildings using the control volume model. Based on the same spatial configuration, the number of participants on each floor, and four-phased evacuations of an actual fire drill conducted by a Japanese academic group in 2018, the numerical analysis results for these phased evacuations of this high-rise building have been investigated. The numerical results are in good agreement with the fire drill data in the aspects of the total number of people reaching the ground floor, the space-time feature curve and the first participant on each floor descending to the ground floor. The changes in the number of waiting participants versus time on each floor were obtained and compared in this study with the fire drill data to comprehend the transient situations of the internal participants in this high-rise building during the phased evacuation. Furthermore, the results of the first-order approximation method of NFPA, the Melinek and Booth method and the Route B calculation of the Japanese Building Center Verification Method for the total building evacuation are presented to discuss the differences between the phased evacuation and the total building evacuation.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis and validation on the phased evacuation time in high-rise buildings

Wu,

Mizuno,

Park

2023

Indoor and Built Environment

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“…Nevertheless, before allowing elevator groups to respond to calls from occupants and help a wide range of elderly residents in high-rise apartment buildings for the elderly, two major difficulties need to be carefully considered--elevator operation safety and evacuation efficiency. Elevators have long been considered unsafe for fire evacuation [6,7]. Possible reasons include the afraid of smoke entering, malfunction of the elevator call buttons, power failure, etc.…”

Section: Introductionmentioning

confidence: 99%

Towards a Smart Elevator-Aided Fire Evacuation Scheme in High-Rise Apartment Buildings for Elderly

et al. 2022

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Staircase evacuation is the major means of fire evacuation for current high-rise residential buildings. However, its feasibility may be questioned as more and more senior citizens live there in the future. The weakness in physical strength and mobility impairment of elderly people may impede the successful implementation of staircase evacuation. It is therefore reasonable to consider using elevators for overall evacuation in high-rise residential buildings. However, enhancing the fire protection of elevators and efficiently controlling the elevator-aided evacuation operations are two major difficulties for applying elevators in building fire evacuation. Recently, the use of smart control for building facility management has become a hot issue in built environment studies. An enabling solution for smart elevator-aided building fire evacuation (SEABFE) is proposed in this article. The solution supports the SEABFE by determining the safer and more efficient elevator-aided evacuation strategy based on real-time fire ground and evacuation progress on the scene. A simulated case study of fire evacuation in a typical high-rise residential building shows that the proposed SEABFE can be successfully performed. Apart from keeping the elevator operation safe, the planned elevator-aided evacuation strategy may save 38.0% of the time compared with the strategy using only staircases in the scene.

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“…Nowadays, elevators are used more and more frequently in daily life and production. Therefore, the number of elevators shows a trend of continuous growth [ 1 ], and the accompanying elevator failure and maintenance problems are becoming more and more prominent [ 2 , 3 ]. As the power device of the elevator, the traction machine determines whether the elevator can operate normally.…”

Section: Introductionmentioning

confidence: 99%

Research on State Recognition Technology of Elevator Traction Machine Based on Modulation Feature Extraction

Yang

Liu

2022

Sensors

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Vibration signal analysis of the traction machine is an important part of the current rotating machinery state recognition technology, and its feature extraction is the most critical step. In this study, the time-frequency characteristics of the vibration of the traction machine under different elevator running directions, running speeds and load weights are analyzed. The novel demodulation method based on time-frequency analysis and principal component analysis (DPCA) is used to extract the periodic modulated wave signal. In order to compare different influence of background noise and unknown frequency influence, the Fast Fourier Transform (FFT) and Short Time Fourier Transform (STFT) methods are used to extract the characteristics of the traction machine vibration signal, respectively. Under different load conditions, it is difficult to observe the obvious differences and similarities of the vibration signals of the traction machine by time-frequency method. However, the DPCA demodulation method provides a guarantee for the reliability and accuracy of the state identification of the traction machine.

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Numerical studies on fire hazards of elevator evacuation in supertall buildings

Cited by 18 publications

References 16 publications

Numerical analysis and validation on the phased evacuation time in high-rise buildings

Numerical analysis and validation on the phased evacuation time in high-rise buildings

Towards a Smart Elevator-Aided Fire Evacuation Scheme in High-Rise Apartment Buildings for Elderly

Research on State Recognition Technology of Elevator Traction Machine Based on Modulation Feature Extraction

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