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  • 安藤 千春
    電気設備学会誌
    2021年 41 巻 12 号 719-723
    発行日: 2021年
    公開日: 2021/12/10
    ジャーナル フリー
  • 幸 晋之介, 糸井川 栄一, 梅本 通孝
    日本建築学会環境系論文集
    2014年 79 巻 695 号 1-10
    発行日: 2014/01/30
    公開日: 2014/07/10
    ジャーナル フリー
    In this study, we focused on human error in self-defense fire-fighting activities as fire safety measures in large-scale buildings. And we clarified human error factors by statistical analysisofreal110 cases of self-defense fire-fighting activities in recent years.
    Consequently,thehuman error in self-defense fire-fighting activities as fire safety measures in large-scale buildings are caused by building characteristics, usage pattern, self-defense activity system and so on as well as disaster environment. Therefore, we showed a human error reduction measures in self-defense fire-fighting activities are necessary to propose for each actors attribute and each activity type.In addition, we have proposed a human error reduction measures in self-defense fire-fighting activities by applying the knowledge of human error measures in aviation, ships, nuclear power and other fields. Furthermore, and we showed a new direction for study of measures to improve the fire safety in large-scale buildings.
  • 山口 頼央
    電気設備学会誌
    2013年 33 巻 2 号 143-144
    発行日: 2013/02/10
    公開日: 2014/09/01
    ジャーナル フリー
  • 市川 誠
    計測と制御
    2005年 44 巻 3 号 216-219
    発行日: 2005/03/10
    公開日: 2009/11/26
    ジャーナル フリー
  • 新宿駅西口地域を対象としたアンケート調査より
    新藤 淳, 平本 達也, 村上 正浩, 久田 嘉章
    日本地震工学会論文集
    2012年 12 巻 4 号 4_288-4_307
    発行日: 2012年
    公開日: 2012/09/28
    ジャーナル フリー
    本稿では、アンケート調査に基づき、東日本大震災発生時に新宿駅西口地域において発生した高層ビル特有の被害や、地域の事業者がとった初動行動、帰宅困難者対応等の実態が把握できた。また、実態に基づき今後の課題を明らかにするとともに、大規模地震発生時の地域の混乱を最小限に留めるための、地域連携による防災力の向上に向けた取組みを提案した。
  • 峯岸 良和
    日本建築学会環境系論文集
    2020年 85 巻 772 号 425-434
    発行日: 2020年
    公開日: 2020/06/30
    ジャーナル フリー

     Fire evacuation in high-rise buildings have difficulties in not only long-distance descent with few staircase and long evacuation time, but also the congestion management of evacuees. In addition, number of elderlies and mobility impairments acting in urban architectures have been rapidly increasing, however they have difficulty in evacuation in fire. For those problems, evacuation using elevators (EVs) is expected to be a promising solution. For example, the guideline of guided evacuation for mobility impairments using fire-fighter’s elevators (EVs) have been established and there are some example of evacuation strategy using shuttle EVs and intermediate refuge outside Japan. However, these examples still have many limitations that former one is only limited for a small number of mobility impairments and latter one requires a lot of staff to guide and control the evacuees using EVs. To solve those problems, the author proposed the evacuation strategy using ordinary-use EVs without discrimination of able-bodied people and mobility impairments with taking advantage of the large capacity and design characteristics of EVs which are planned for dairy transportation demands.

     Two types of high-rise buildings are examined; one is large floor area tenant office buildings which is almost the floor are tenant office. The other one is complex usage buildings such as consisted of retail, tenant office, and hotel. For office floors of both type of buildings, by using all the EV cars which servers the fire floor, EV cars can arrive at the fire floor about every 30 to 45 seconds. This can relief anxiety feeing and contribute to sober-minded entering EVs car or stay the floors without direction by staff. For evacuation of the occupants staying at the floors around the fire floor, EVs are insufficient to transport all of evacuees there. For those floors, guidance by signage to prioritize the mobility impairments to use EVs and to introduce staircases for able-bodied people is necessary. Staircases have large transportation capacity, however, it will tend to be crowded in simultaneous evacuation. To avoid this congestion, occupants at other zones where EV banks of the fire floor does not server are encouraged not to use staircases but to use EVs or stay their floors.

     Mixed usage high-rise buildings are usually planned with EV lobby floor and shuttle EVs from the ground floor. Besides, the floors where switch the usage of lower floors and upper floors tend to be amenity space, common space or roof garden. Those spaces can be used as temporary rest space or transferring floor with EVs and stairs. Especially when occupants are directed to use certain evacuation measure such as EVs or stairs depending on the allocation of fire floor, those evacuation spaces are effectively used because certain evacuation measures lead the evacuees to different evacuation spaces naturally. On the other hand, at EV lobby floor, maximum transportation capacity of shuttle EVs are usually smaller than that of local EVs which serve upper floors, therefore evacuees may excessively accumulate at the EV lobby floor. For EV evacuation planning, preliminary increment of EV capacity is necessary and the intensive allocation of staff from disaster control center is required.

  • 長谷川 晃一
    電気設備学会誌
    2007年 27 巻 4 号 302-306
    発行日: 2007年
    公開日: 2015/04/14
    ジャーナル フリー
  • 峯岸 良和, 竹市 尚広, 尾崎 直哉
    日本建築学会技術報告集
    2023年 29 巻 72 号 834-839
    発行日: 2023/06/20
    公開日: 2023/06/20
    ジャーナル フリー

    In recent years, the need for accessibility for people with impairments has been growing. This trend requires event halls, such as arenas and multi-purpose venues, to install an increased number of wheelchair-user seats at various places. However, evacuation of wheelchair users is a difficult problem, especially while the crowd of healthy people also evacuate simultaneously. This paper presents the essence of a fire evacuation design and guidance program for wheelchair users in event halls by analyzing the decision process of an actual design example of a multi-purpose venue.

  • -高層共同住宅における地震後火災に対する安全性評価手法の構築 その1-
    花井 英枝, 河野 守, 髙橋 済, 北後 明彦, 村田 明子
    日本建築学会環境系論文集
    2016年 81 巻 722 号 345-355
    発行日: 2016年
    公開日: 2016/04/30
    ジャーナル フリー
     In metropolitan areas where an enormous number of evacuees are expected, residents of high-rise buildings will be requested to stay in their home even after an earthquake as much as possible. The residents are not familiar with such fire protection systems and are not likely to notice damage on them. It is expected that the residents would decide to stay home in the aftermath of the earthquake if the building has no structural problem even if the fire protection systems are damaged.
     If the residents continue to live in a high-rise building, it is necessary to check fire safety to avoid a disaster in case of a fire after checking that the building has no structural problem. However, there will be no easily accessible method of assessing fire protection feature of the damaged buildings by checking damage conditions after an earthquake. It is socially significant to construct simple methods for residents, management company and specialists to inspect fire protection features of a damaged building and judge if the building can be safely used against a fire after an earthquake. The purpose of this research is to develop a method of assessing fire safety of the buildings damaged by an earthquake. In this paper a survey was conducted on the action taken by residents and management company and the damage, inspection and restoration of fire protection systems after the great earthquake.
     The following three issues are studied based on the survey results; (1)who will be able to conduct the inspection, (2)time phases after an earthquake and (3)necessary conditions to continue living in a high-rise building.
     The study results are as follows;
     - People who inspect the buildings and fire prevention systems vary with the lapse of time. The residents need to conduct the inspection for a certain period of time after the earthquake.
     - Fire prevention features get lower immediately after the earthquake and gradually recover to normal as the surrounding situation improves (people returning home, lifeline restoration (electricity and water supply), and reunited fire brigade) and the fire prevention features are restored by inspection and repairs.
     - It may be difficult to encourage the residents to evacuate from the high-rise building after the earthquake even if the fire prevention features have some failures. Keeping safety against a fire by lowering a fire risk with fire usage restriction will be a practical method if the residents continue to live in the building with lower fire prevention features.
     It can be concluded the following is important to make the assessment method more efficient, considering the above.
     - Divide the period after the earthquake into several time phases based on the time elapsed (hereafter referred to as “phase”) and clarify the minimum fire prevention features required for each phase in order to assess safety of high-rise building against a fire after an earthquake in a viewpoint of “whether the residents can continue to live in the building.”
     - Check whether the building maintains required features by inspection of the fire prevention features and lower a fire risk properly. Impose more stringent limits or encourage evacuation if no features are maintained.
     This study divides the period from the earthquake occurrence to the normal condition (fire protection features) into four time phases and shows which restoration stage each phase indicates, approximate period of each phase, fire protection features required and a reduction of fire risk imposed per each phase.
  • 樋本 圭佑, 鈴木 圭一
    日本建築学会環境系論文集
    2016年 81 巻 728 号 855-863
    発行日: 2016年
    公開日: 2016/10/30
    ジャーナル フリー
     A model for fire risk assessment of a mid-rise or high-rise buildings is developed considering seismic damage of six fire safety equipment systems including sprinkler system, mechanical smoke exhaust system, fire door, fire detector, fire extinguisher, and indoor fire hydrant. The model consists of three sub-models, namely, (a) the two-zone smoke transport model, (b) the model for fire-fighting activity of occupants, and (c) the network-based model for evacuation of occupants. The two-zone smoke transport model predicts smoke transport inside of a building until the fire ends either by extinguishment by fire-fighting activity of occupants or by burn out of entire fire load. Activation time of a sprinkler system and a fire detector is predicted based on the RTI model considering the effect of ceiling jet in the two-zone environment. The fire-fighting model determines success and failure of fire-fighting activity by comparing the maximum size of fire extinguishable by an equipment, Zcr, with the size of fire at the time fire-fighting starts, Z(tFF). Start time of fire-fighting activity by occupants, tFF, depends upon the activation time of fire detector. The evacuation model predicts movement of individual occupants on a route network with the room as a node and the door as a link. Failure of evacuation of an occupant is determined by comparing the smoke layer height, HS, with the critical smoke layer height. Damage of a fire door not only allows the leakage of smoke from a fire room to adjacent rooms, but may also block a passage of occupants. Availability of each fire safety equipment systems is analyzed by the fault trees and their probabilistic parameters such as damage ratio of the systems and occurrence probability of power outage under a certain seismic condition is modeled based on the records of past earthquakes.
     As a case study, the model is applied to a hypothetical nine-story building with building area of 1,144m2 and its post-earthquake fire risk is assessed by the Monte Carlo simulation. Among the six fire safety equipment systems considered in the present model, availability of sprinkler system, mechanical exhaust system, and indoor fire hydrant were more sensitive to seismic shaking compared to the others. This is attributed not only to the damage of the system itself, but also to availability of power, water for fire-fighting, and probability of occupants engaging in fire-fighting activity. Exceedance frequency of the fire damage represented by the smoke vitiated area and the number of evacuation-failed occupants showed that the fire damage remains minor in most of the cases even if occurred. However, the proportion of major damage increases with the increase of seismic intensity. While the maximum smoke vitiated areas for each seismic intensity converged into a same degree, the maximum number of evacuation-failed occupants varied. This indicates that the range of human loss expands as the unavailability of fire safety equipment systems increases.
  • 中濱 慎司, 関澤 愛, 池畠 由華, 野竹 宏彰
    日本建築学会計画系論文集
    2013年 78 巻 693 号 2273-2280
    発行日: 2013/11/30
    公開日: 2014/07/10
    ジャーナル フリー
    In many past fires, not a few people used elevators for their evacuation, although they were often told not to use elevators for fire evacuation. On the other hand, the number of people, who have difficulty to use stairs, has been larger year by year not only in usual buildings but also in high-rise buildings as well, since the aged people have been rapidly increasing along with improved accessibility for disabled people. Also, the potential demand of elevator use in evacuation from a high-rise building has been growing recently especially after the collapse of WTC towers on September 11th, 2001. The evacuation using elevators in case of a fire is still a controversial issue, because the safe operation of elevators is not always secured during evacuation in a fire. In the context of this situation, we developed a simplified model to simulate the operation of multiple elevators for calculating evacuation time by elevators. And, we conducted some case studies with this elevator operation model to examine the feasibility and issues of elevator use for evacuation mainly from the viewpoint of its transportation efficiency of occupants rather than fire safety aspects during the operation.
  • 峯岸 良和, 高橋 済, 池畠 由華
    日本建築学会環境系論文集
    2024年 89 巻 817 号 89-100
    発行日: 2024/03/01
    公開日: 2024/03/01
    ジャーナル フリー

    We examined how guests sleeping in a small-scale hostel, such as a vacation rental (minpaku), for which there has been increasing demand in recent years, perceive the voice alarm of wireless, interconnected smoke alarm detectors using three different alarm-sounding patterns. All participants were awakened by the alarm sounding in other rooms or their own rooms. However, two participants could not grasp the intention of the voice alarm clearly. Visitors’ comprehension of the alarm system is necessary in order for them to understand the intention of the alarm correctly and make the proper decisions regarding evacuation.

  • 峯岸 良和, 高橋 済, 池畠 由華
    日本建築学会環境系論文集
    2022年 87 巻 800 号 607-618
    発行日: 2022/10/01
    公開日: 2022/10/01
    ジャーナル フリー

    For fire evacuation safety in office buildings that include small rooms and where many occupants cannot directly see fire or smoke, fire alarms play a significant role in situational awareness and decision-making pertaining to evacuation. We conducted experiments to examine how individuals feel sound of fire alarms at different size of rooms using a mobile VR head-mounted display. We revealed the effect of early warning and evacuation-directive voice alarms installed at different places, e.g., a large office room and a small meeting room. In addition, we discussed the awareness process of occupants considering the configuration of smoke detection system.

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