• Fire Science and Engineering
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• v.27 no.3
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• pp.72-79
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• 2013

Recently, building constructions have been developed toward high-rise, long span, and multi-complexed using the high strength materials, optimized section. But the structural behavior of steel structural members built with a high strength steel at fire condition is not clarified because of lacking of information of related references such as mechanical and thermal properties at high temperature situation. In this paper, to evaluate the structural stability of member or frame of steel framed building at fire situation through the engineering method, the mechanical and thermal experimental coupon tests have conducted at various high temperatures and the comparison to those of ordinary strength steels were done.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2013.04a
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• pp.62-63
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• 2013

최근 전 세계적으로 여러 가지 목적으로 초고층 및 대형건축물이 급속도로 건설되고 있다. 건축물이 대형화, 고층화 될수록 피난 동선 및 피난 소요시간은 길어지게 된다. 이에 많은 국내 외 연구에서 대규모 건축물에서의 피난안전성평가를 진행하고 있다. 일반적으로 건축물에서의 피난안정성을 평가하기 위해서는 실제 실험의 어려움 등으로 인해 외산 시뮬레이션을 사용한다. 이러한 외산 프로그램들은 국내의 법규 및 특성을 반영하지 못하는 한계가 있다. 따라서 본 연구에서는 대규모 복합건축물의 한국형 피난시뮬레이션 개발을 위한 연구 및 방향을 제시하고자 한다.

• Journal of the Korea Institute of Building Construction
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• v.16 no.6
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• pp.545-551
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• 2016

Membrane structures which can be used large spatial structure are being expanded because of various advantages. However, despite the diverse membrane structure buildings and materials, the standard for membrane material performance that considering fire safety is still inadequate. Therefore, this study applied basalt or glass woven fabric with flame resistance on architectural membrane, and report the fire safety for architectural membrane using the strength properties, flammability and incombustibility. From the test result, the architectural membrane using basalt or glass woven fabric showed a low heat release rate and total heat release. Therefore, it was confirmed that the fire safety is relatively high.

• Journal of the Korea institute for structural maintenance and inspection
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• v.13 no.6 s.58
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• pp.75-87
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• 2009

In this study, FEM analysis has been performed based on the results from domestic experimental researches regarding to material and member characteristics of masonry. After validation of reliability for the used FEM analysis method, this study is progressed the evaluation of seismic capacity for existing prototype masonry building in Korea. According to the evaluation for the prototype masonry building, the horizontal shear force and the average shear stress are similar to those of previous studies.

• Fire Science and Engineering
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• v.27 no.4
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• pp.7-12
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• 2013

Recently, the risk of fire outbreak is going up because of newly developed combustible materials are intended to apply more. Especially the steel framed structure can lose its load-bearing capacity when it is exposed to higher temperature condition such as a fire. So the pre-evaluation of fire resistance of the structure is very essential that the mechanical properties of yield strength and elastic modulus and thermal properties such as conductivity and linear expansion be required. To get the databases for SM 400 or welding structural steels at high temperature, various temperature conditions were used for deriving the yield strength, elastic modulus, linear expansion, and conductivity and the results were compared to those of SS 400, ordinary structural steel, respectively.

• Journal of the Korea Institute of Building Construction
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• v.19 no.4
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• pp.331-339
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• 2019

Recently, expansion of urban and social infrastructures is planned to go through the transfer of military facilities or crossing the infrastructures via underground tunnels. However, when crossing facilities such as ammunition and explosive storages, a high level of safety assessment is required to prevent an accidental explosion of ground ammunition. In this study, a case study was conducted to evaluate the effect of blasting for the construction of tunnel on the ground ammunition facilities. The design section of Sinansan train operated by the Korea Railroad Authority with agreement of the Ministry of National Defense was selected. For the purpose of this study, the vibration velocity due to explosion was predicted by using GTS-NX, a numerical analysis program. Through literature review, it was confirmed that the vibration velocity of 0.2cm/sec can be a safety evaluation standard. These safety evaluation indicators and procedures used in this study can be utilized as an index of safety evaluation in the planning of social infrastructures that cross the ammunition facilities in the future.

• Journal of the Korea institute for structural maintenance and inspection
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• v.25 no.3
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• pp.92-99
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• 2021

In the case of precise safety inspection and precise safety diagnosis of a building, a condition evaluation must be conducted to determine the safety grade. Since 2004, an evaluation method using fuzzy theory has been introduced for quantitative condition evaluation,and the relationship and importance of reinforced concrete members using fuzzy theory have been applied. Generally, fuzzy theory is a method used to deal with ambiguous expressions with unclear correlations, but at the time of development, it seems that it was developed by applying fuzzy theory as an alternative in a situation where inspection and diagnosis result data were insufficient. Therefore, it is necessary to verify the relationship and importance of evaluation items derived based on the current fuzzy theory using actual inspection and diagnosis result data.In this study, the correlation between the evaluation items was derived by using the results of 19 precision safety inspections and 9 precision safety inspections and the performance score function formula, and using this, a reasonable durability score calculation formula of the member was presented.

• Magazine of the Korea Concrete Institute
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• v.14 no.5
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• pp.40-46
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• 2002

산업화 도시화에 따른 건축물의 밀집과 고층화의 환경에서 화재 재해 발생은 인명피해 및 재산피해에 치명적인 결과를 가져올 수 있으며 화재로 인한 인명 및 재산 피해는 두말할 것도 없이 막대한 국가적 손실을 초래한다고 할 수 있다. 따라서 화재발생을 사전에 억제하는 구조물의 방화ㆍ내화구조 및 피난계획, 소화설비 소화활동설비 등에 대한 방재 연구와 더불어 화재발생후 화재의 원인조사와 구조물의 재사용 여부 또는 보강 필요성, 자산의 평가의 과학적인 근거를 위해 신뢰성 있는 안전성 평가에 대한 연구가 필요한 실정이다.(중략)

• Fire Science and Engineering
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• v.31 no.1
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• pp.98-107
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• 2017

This study examined an effective way of measuring the evacuation performance in buildings, which are applied to a double skin facade through an evaluation of the escape safety. Buildings with a double skin facade appeared to have a faster combustion expansion speed for the upper floor if a fire occurs. Moreover, a double skin facade is more difficult to escape safely than a general building construction because of the limited design standards. Accordingly, this study suggested virtual modeling including single emergency stairs and alarm systems considering the risk in each structure of buildings. These results showed that box-type double skin, corridor access type, shaft-box type, and multistory facade systems showed a 26.4%, 29.1%, 23.4%, and 26.3% increase in evacuation performance, respectively, as well as securing the safety of occupants.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.485-486
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• 2010

In this research, a new analysis method which is able to examine the safety and to assess the serviceability of high-rise buildings from construction period to service life has been developed. The effect of both construction sequence and inelastic behavior of concrete has been considered in the developed analysis method in three dimensions. The more efficient analysis technique and modeling method for practical use were also suggested. For verification of the developed analysis method, the data measured in a high-rise building under construction was compared with the analysis results. Through comparison of the analysis results with the measured data, it was found that the analysis results generally simulated the trend of the measured data well in all cases.