Virtual reality-based evaluation of indoor earthquake safety actions for occupants

Zhang, Furong; Xu, Zhen; Yang, Yajun; Qi, Mingzhu; Zhang, Huazhen

doi:10.1016/j.aei.2021.101351

Cited by 15 publications

(13 citation statements)

References 33 publications

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“…This study performed the THAs of the building structures according to the reference 47 and used the EDPs outputted by the THAs to calculate the seismic damage of nonstructural components according to FEMA P-58. Seismic motion model of suspended ceiling: To calculate the seismic damage to the suspended ceiling, this study adopted the seismic motion model proposed by Xu et al 37 , 38 . This model can accurately predict the falling-out state of suspended ceilings by the probability value of the FEMA P-58 vulnerability curve corresponding to the peak floor acceleration obtained through the THA.…”

Section: Methodsmentioning

confidence: 99%

“…However, these methods failed to show the damage of nonstructural components based on physical simulations. Xu et al 37 , 38 proposed a method to simulate and visualize the seismic damage of ceiling and movable furniture based on time-history analysis (THA), FEMA P-58 (i.e., a code for assessing the damage of components), and a physical engine. However, their seismic damage model for movable furniture did not analyze cases such as overturning.…”

Section: Introductionmentioning

confidence: 99%

“…However, their seismic damage model for movable furniture did not analyze cases such as overturning. Therefore, based on the method of Xu et al 37 , 38 , this study improved the seismic damage model of movable furniture so as to simulate and visualize the seismic damage of indoor ceilings and movable furniture.…”

Section: Introductionmentioning

confidence: 99%

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Mixed reality drills of indoor earthquake safety considering seismic damage of nonstructural components

Xu,

Yang,

Zhu

et al. 2023

Sci Rep

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The damaged indoor nonstructural components in the earthquake often cause casualties. To improve the indoor earthquake safety capacity of occupants, a mixed reality (MR) drill method for indoor earthquake safety considering seismic damage of nonstructural components is proposed. First, an MR device, HoloLens, is used to capture indoor point clouds, and the indoor three-dimensional scene is reconstructed using point clouds. Subsequently, the seismic motion models of indoor components are established, so that the indoor nonstructural seismic damage scene is constructed using the physics engine and displayed using HoloLens. Finally, a guidance algorithm for a safe zone was designed for the drills. Taking a typical office as an example, an indoor earthquake safety drill was performed. The drill results show that the proposed MR method can increase the average efficiency of moving to a safe zone by 43.1%. Therefore, the outcome of this study can effectively improve the earthquake safety ability of occupants, thereby reducing casualties.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mixed reality drills of indoor earthquake safety considering seismic damage of nonstructural components

Xu,

Yang,

Zhu

et al. 2023

Sci Rep

Self Cite

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“…The large rocking responses of the 3DBI also cause significant displacement and velocity responses of the superstructure, which can become a threat to the human safety 33 . Figure 13 shows the displacement and velocity responses at the roof of 3DBI and S3DI when the vertical isolation period is 1 s under the Imperial Valley‐06 ground motion (No.…”

Section: Numerical Simulation Of Seismic Performance Of Separated 3d ...mentioning

confidence: 99%

Seismic performance analysis of steel frame structures with separated three‐dimensional isolation

Shi

Wang

Zhang

et al. 2023

Earthquake Engineering and Resilience

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base isolation can significantly improve the seismic performance of structures. However, significant 3D movement coupling and rocking behavior of the superstructure due to the high gravity center of the structure can be observed, which will lead to a complex design of the isolation system and the isolators. In addition, as the 3D isolators are installed beneath the structures, they need to support the heavy weight of the superstructure with low vertical stiffness. It is difficult to meet both the vertical load and stiffness design demands of the isolators using traditional isolation materials and mechanisms, especially for large-size structures. A separated 3D isolation scheme is proposed by installing the horizontal isolation at the base of the superstructure and the vertical isolation under the floor slabs. Simulations are carried out to examine the dynamic responses including the acceleration, inter-storey drift, and stress of structural members of a typical steel frame structure with the separated 3D isolation scheme. The isolation effect was also studied by shaking table tests of a two-storey steel frame structure.

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“…The effects of collapsing large objects and falling ceilings are simulated using physics engines such as Bullet to conduct earthquake evacuation training in hospital 20 scenario. Zhang et al 21 studied the movement of ceilings in detail and built physical models of ceilings to assess the effectiveness of various pedestrian actions more accurately. Therefore, 3D scenario can represent the dynamic changes in the indoor environment more accurately.…”

Section: Simulation Scenario Constructionmentioning

confidence: 99%

Seismic evacuation simulation in a dynamic indoor environment

Chu

Liu

et al. 2022

Computer Animation & Virtual

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During an earthquake, interior nonstructural components of a building will be damaged. The damaged objects will obstruct pedestrians' evacuation routes and increase casualties. But this issue has received scant attention in evacuation simulation research. This paper focuses on this issue and proposes an indoor seismic evacuation model to simulate crowd evacuation in a dynamic environment.A physical model of nonstructural components is presented to simulate the dynamics of the indoor scenario. The flow field algorithm is constructed to guide pedestrian's avoidance behaviors globally to reflect the impact of environmental changes on indoor crowd path selection, and a modified social force model is built to simulate the joint influence of seismic forces and the environment on pedestrian motion states. The results of the experiments shows that the proposed model can generate realistic evacuation scene and rational evacuation routes in the earthquake.

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Virtual reality-based evaluation of indoor earthquake safety actions for occupants

Cited by 15 publications

References 33 publications

Mixed reality drills of indoor earthquake safety considering seismic damage of nonstructural components

Mixed reality drills of indoor earthquake safety considering seismic damage of nonstructural components

Seismic performance analysis of steel frame structures with separated three‐dimensional isolation

Seismic evacuation simulation in a dynamic indoor environment

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