• 제목/요약/키워드: Risk assessment method for high-rise buildings

검색결과 5건 처리시간 0.021초

A Study on a Risk Assessment Method and Building Simulation for the Development of a Korean Integrated Disaster Evaluation Simulator (K-IDES) for High-rise Buildings

  • Kim, Tae-Young;Han, Gi-Sung;Kang, Boo-Seong;Lee, Kyung-Hoon
    • Architectural research
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    • 제22권4호
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    • pp.105-112
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    • 2020
  • The purpose of this study is to establish a method for assessing a building's risk against disaster, tentatively named the Korean integrated disaster evaluation simulator (K-IDES). Based on previous studies, FEMA's risk management series and FEMA IRVS are selected as case studies for developing a frame work of K-IDES, through the comparative analysis of domestic building design guides, codes, and special acts related to disasters, in order to develop a risk assessment methodology for quantitative results. The assessment method consists of a classification system and calculating risk, and a simulation applying the developed checklist in K-IDES to similar types of high-rise buildings will be conducted to validate its accuracy. The final goal is to systemize an integrated risk management in a high-rise building against disasters for the purpose of recognizing vulnerable areas from the beginning of the design process and reinforcing it from potential threats after construction.

Seismic Risk Assessment of Existing Low-rise Reinforced Concrete Buildings in Korea

  • LEE, Kang Seok;Jung, Ju-Seong;Choi, Yun-Chul
    • Architectural research
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    • 제20권1호
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    • pp.17-25
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    • 2018
  • Countermeasures against earthquake disasters such as the seismic capacity evaluation and/or retrofit schemes of buildings, especially existing low-rise reinforced concrete buildings, have not been fully performed since Korea had not experienced many destructive earthquakes in the past. However, due to more than 1200 earthquakes with low or moderate intensity in the off-coastal and inland of Korea during the past 20 years, and due to the recent moderate earthquakes in Korea, such as the 2016 Gyeongju Earthquake with M=5.8 and the 2017 Pohang Earthquake with M=5.4, the importance of the future earthquake preparedness measures is highly recognized in Korea. The main objective of this study is to provide the basic information regarding seismic capacities of existing low-rise reinforced concrete buildings in Korea. In this paper, seismic capacities of 14 existing low-rise reinforced concrete public buildings in Korea are evaluated based on the Japanese Standard for Evaluation of Seismic Capacity of Existing Reinforced Concrete Buildings. Seismic capacities between existing buildings in Korea and those in Japan is compared, and the relationship of seismic vulnerability of Korean buildings and Japanese buildings damaged due to severe earthquakes are also discussed. Results indicated that Korean existing low-rise reinforced concrete buildings have a narrow distribution of seismic capacities and they are relatively lower than Japanese buildings, and are also expected to have severe damage under the earthquake intensity level experienced in Japan. It should be noted from the research results that the high ductility in Korean existing low-rise buildings obtained from the Japanese Standard may be overestimated, because most buildings investigated herein have the hoop spacing wider than 30 cm. In the future, the modification of strength and ductility indices in the Japanese Standard to propose the seismic capacity evaluation method of Korean buildings is most needed.

Nonlinear incremental dynamic analysis and fragility curves of tall steel buildings with buckling restrained braces and tuned mass dampers

  • Verki, Amir Masoumi;Preciado, Adolfo
    • Earthquakes and Structures
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    • 제22권2호
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    • pp.169-184
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    • 2022
  • The importance of seismicity in developing countries and the strengthening of buildings is a topic of major importance. Therefore, the study of several solutions with the development of new technologies is of great importance to investigate the damage on retrofitted structures by using probabilistic methods. The Federal Emergency Management Agency considers three types of performance levels by considering different scenarios, intensity and duration. The selection and scaling of ground motions mainly depends on the aim of the study. Intensity-based assessments are the most common and compute the response of buildings for a specified seismic intensity. Assessments based on scenarios estimate the response of buildings to different earthquake scenarios. A risk-based assessment is considered as one of the most effective. This research represents a practical method for developing countries where exists many active faults, tall buildings and lack of good implementable approaches. Therefore, to achieve the main goal, two high-rise steel buildings have been modeled and assessed. The contribution of buckling-restrained braces in the elastic design of both buildings is firstly verified. In the nonlinear static range, both buildings presented repairable damage at the central top part and some life safety hinges at the bottom. The nonlinear incremental dynamic analysis was applied by 15 representative/scaled accelerograms to obtain levels of performance and fragility curves. The results shown that by using probabilistic methods, it is possible to estimate the probability of collapse of retrofitted buildings by buckling-restrained braces and tuned mass dampers, which are practical retrofitting options to protect existing structures against earthquakes.

국·내외 기준개선을 통한 국내 초고층 건축물의 화재피해경감 대책에 관한 연구 (A study on measures for the mitigation of fire damage in Korea super high-rise building through the improvement of domestic·foreign standards)

  • Ko, Jaesun
    • 한국재난정보학회 논문집
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    • 제13권2호
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    • pp.233-248
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    • 2017
  • 초고층 건축물의 발생 가능한 화재를 방지하기 위해서는 통일된 법 규정과 합리적인 설계가 필요하다. 이를 위해 본 연구는 초고층 및 대형 건축물관련 건축심의 성능위주설계(PBD)평가 재해영향평가(DIA)를 중심으로 이 제도의 대상이 되는 건축물과 그 내용상의 문제를 분석하여 성능위주 설계를 기반으로 하는 화재 공학적 화재예방 개선방안을 도출하였다. 먼저 법 기준개선측면에서는 첫째 성능위주설계(PBD)평가와 재해영향평가 등에 있어서 상당부분이 동일한 내용임에도 불구하고 두 개의 법령으로 이원화된 부분은 일치 시키고 통폐합해서 운영하는 것이 필요하다. 둘째, 성능위주설계(PBD)평가와 재해영향평가(DIA)의 통폐합이 불가능하다면, 성능위주설계(PBD)평가와 재해영향평가(DIA)의 내용의 영역이 명확히 구분되어 정립되어야 한다. 다음 초고층 건축물의 공학적 화재위험성에 대한 개선방안으로는 NFPA 규정대로 첫째 특별 피난 계단에서 직통계단의 규정을 개정할 필요가 있으며, 배연창 대신 기계식 배연설비를 설치하는 경우, 미국에서 사용하는 샌드위치 가압방식(Sandwich Pressurization) 허용하고, 둘째 특별 피난계단용 제연설비는 화재시 구간별로 급기 할 수 있도록 기준의 개정 및 설계초기 단계부터 준공까지 성능위주설계 진행 등이 필요한 것으로 나타났다. 향후 이상의 연구에서 도출한 개선책 반영과 함께 초고층 건축물의 대한 또 다른 고려사항들에 대해 추가적인 연구가 진행되고, 또한 유지관리에 대한 연구가 진행되어 그 결과를 반영할 수 있는 초고층 건축물이라면 화재로 인한 인명피해 및 재산손실을 줄이는데 획기적인 기여를 할 것으로 예상된다.

성능위주설계자들의 화재실 범위 설정 방식에 따른 소요피난안전시간(RSET) 비교 및 오차산정에 관한 연구 (A Study on Required Safe Egress Time (RSET) Comparison and Error Calculation in Relation to Fire Room Range Set Conditions of Performance Based Fire Safety Designers)

  • 백소나;최준호;홍원화;정종진
    • 한국화재소방학회논문지
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    • 제30권3호
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    • pp.73-78
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    • 2016
  • '화재예방, 소방시설 설치유지 및 안전관리에 관한 법률'에 의하면 지하층 포함 30층 이상 고층 건축물에 대해 화재발생에 따른 위험성을 사전에 과학적으로 평가하여 재난발생 시 인명피해 및 재산피해를 최소화시킬 수 있도록 성능위주 설계를 실시해야 한다. 이에 따라 설계자는 컴퓨터 시뮬레이션 모델링 등 과학적인 분석 기법을 활용하여 거주자의 화재 및 피난 안전성을 평가하고 있다. 이 때, 인명안전성 평가를 위해 가용피난안전시간(ASET)과 소요피난안전시간(RSET) 을 산정하게 되는데 RSET 중에서도 가장 중요한 '반응시간(Response Time)'을 산정함에 있어 우리나라 사람들에 대한 실측 데이터에 기반한 명확한 법적 기준이 제시되지 못하고 있는 것이 현실이다. 이에 '소방시설 등의 성능위주설계 방 법 및 기준, 별표1'을 토대로 설계자별로 각각 상이한 값을 선택, 입력하거나 일본건축센터의 '건축방재계획지침'에 따라 계산하고 있는 경향을 보이고 있다. 따라서 본 연구에서는 최근 5년간 부산지역에서 성능위주 설계대상으로 지정된 고층 특정소방대상물을 대상으로 총 6명의 설계자가 실시한 성능위주 설계안 13건을 중심으로 RSET의 계산방법에 대해 비교 분석하였고, 특히 RSET 계산 시 결과값에 가장 큰 영향을 미치는 반응시간의 계산방법에 대한 결과를 비교하여 오차값을 산정하였다.