• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 추계 학술논문 발표대회
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• pp.119-120
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• 2014

In this study, we looked into the method to establish fire growth rate by buildings use for growing fire at the beginning of a fire considering the characteristics of the combustibles in a performance-based design. Actual conditions survey and literature review were carried out for the fire load and exposed surface area of combustibles to establish design fire by domestic building use. As a results, a simplified prediction equation of fire growth rate which depends on fire load and weight of combustibles could be derived by calculating the relation between the fire load and the fire growth rate of an initial fire through investigation of combustibles by domestic building use.Also, as a result of analyzing the placement of combustibles and location of the ignition source, it was found that the influence of the materials of the combustibles and the materials of the combustibles adjacent to the ignition source is big. Though 4 different experiments were carried out for the evaluation, the result of comparing the findings with those of FGR model showed that the fire growth rate was similarly derived.

• 국제초고층학회논문집
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• 제5권3호
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• pp.213-220
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• 2016

The "China Zun" tower in Beijing will rise to 528 meters in height and will be the tallest building in Beijing once built. Inspired by an ancient Chinese vessel, the "Zun", the plan dimensions reduce gradually from the bottom of the tower to the waist and then expand again as it rises to form an aesthetically beautiful and unique geometry. To satisfy the structural requirement for seismic and wind resistance, the structure is a dual system composed of a perimeter mega structure made of composite mega columns, mega braces, and belt trusses, and a reinforced-concrete core with steel plate-embedded walls. Advanced parametric design technology is applied to find the most efficient outer-perimeter structure system. The seismic design basically follows a mixed empirical and performance-based methodology that was verified by a shaking table test and other specimen lab tests. The tower is now half-way through its construction.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.808-812
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• 2008

최근 건축물들이 100층 이상이 되는 Super Tall 추세로 증가되어가면서 자연스럽게 건축의장 부분에서도 변화의 바람이 불고 있다. 기존 건축물들을 구성하던 중량벽체를 대신하여 비내력벽 개념의 커튼월 시스템 사용으로 변화되어가고 있다. 그러나 커튼월 시스템은 건축물의 외부환경인 공기와 빛, 열 등의 요소들로 인해 부하가 많이 발생하며 특히 커튼월 외피부분에 발생되는 결로 문제가 심각해지고 있는 실정이다. 특히 국내 건설시장의 여건 상 건축물들의 밀집화로 인한 통풍량 및 일조량 부족으로 결로발생은 더욱 심각해지고 있다. 하지만 아직까지 결로발생을 검토하는 표준화된 절차가 정립하지 않은 실정으로 건설사업관리자를 위한 결로발생 검토프로세스 마련이 시급하다 할 것이다. 본 연구는 커튼월 시스템의 대표적 타입인 Unitized 시스템과 Stick 시스템 선정하여 동일한 온도에서 상대습도의 변화에 따른 결로 발생범위 및 온도분포를 비교 분석하여 커튼월 결로성능을 평가하고 향후 결로발생 검토프로세스 마련을 위한 기초자료를 제공코자 한다.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2011년도 춘계학술논문발표회 논문집
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• pp.345-350
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• 2011

본 연구에서는 건축물의 초고층화와 대형화로 접목된 커튼월을 모델로 선정하여 알루미늄과 스틸 커튼월의 성능 비교를 위한 화재실험을 실시하였다. 화재실험은 $3m{\times}3m$ 규모의 알루미늄과 스틸 재질로 제작하여, 차염성, 차열성, 방열성, 변위, 커튼월 파괴를 측정하였다. 실험결과 알루미늄커튼월의 차염성은 12분, 차열성은 6분, 방열성은 26분을 기록하였고 스틸커튼월의 차염성은 10분, 차열성은 6분, 방열성은 14분을 기록하였다.

• 국제초고층학회논문집
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• 제8권3호
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• pp.193-199
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• 2019

For better structural performance and constructability, a new composite core wall system using steel plate columns at the corners of the core section was developed. Using the proposed core wall, nonlinear section analysis and 3-dimensional structural analysis were performed for the prototype core wall section and super high-rise building, respectively. The analysis results showed that, when compared to traditional RC core wall case, the use of the corner steel plate columns provided better structural capacity, which allows less wall thickness and re-bars. Further, due to such effects, the construction cost and time can be reduced despite the use of steel plate columns.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 춘계학술논문 발표대회
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• pp.51-54
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• 2007

This study investigates the properties of paste and mortar from different types and forms of silica fume on cement binder for ultra high strength. Although most Silica Fumes distributed in the market fulfill the KS quality standard, each type showed different levels of loss of ignition. When evaluating cement binder for ultra high strength in a form of paste. Flow, viscosity and moving freely time show great difference depending on the Silica Fume's form and type of primary particle's dispersibility. The evaluation of Silica Fume's dispersibility can be possible with the paste test since there is a high correlation of flow quality between paste and mortar. The compressive strength when using Silica Fume was correlated to the SiO2 content. Synthetically, selecting Silica Fume with the most the ideal primary particle is the key to optimizing the formation for cement binder for ultra high strength.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 추계 학술논문 발표대회
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• pp.37-40
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• 2007

This study investigates the effect of the pre-mix cement to the physical properties of the concrete according to the various combinations of the binders and the silica fume types. The results are summarized as following. For the properties of the fresh, the fluidity in the case that OPC+cilica fume-blast-furnace slag is appropriate compared to OPC+cilica fume+fly ash. Expecially, it is favorable when pre-mix is used. The fluidity time of the A, B depending on silica fume types is favorable, but it is decreased on C. The air content depending on silica fume types is low when the fly ash is used. Specially, the air content in the case that pre-mix is used is low caused by the dispersion of the silica fume. For the properties of the hardened concrete, the compressive and flexible strength when the blast-furnace slag is pre-mixed are high, and they exceed OPC. The strength depending on the silica fume types is high on B, and the strength of the others is similar.

• 한국건축시공학회지
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• 제15권4호
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• pp.375-381
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• 2015

본 연구에서는 초고층 구조물 시공시, 적용되는 규격별 고성능 콘크리트의 특성을 평가하고 60MPa의 고성능 콘크리트를 대상으로 높이가 500m부터 575m인 지점까지 압송계측 결과를 근거로 하여 압송성능과 고성능 콘크리트의 유동특성의 상관관계를 분석하였다. 분석 결과, 각 규격별 굳지 않은 콘크리트의 물성과 재령 12시간의 초기강도 및 기준 재령에서의 압축강도 및 탄성계수는 모두 품질기준을 만족함이 확인되었다. 또한, 높이별 최대 압송압력은 약 5% 정도씩 증가하였으며, 시간당 토출량도 최소 $25m^3$를 만족하는 것으로 나타났다. 펌프압송 후 콘크리트의 온도증가와 압송전의 콘크리트 소성점도의 크기에 따라 슬럼프 플로우의 손실이 증가됨을 확인할 수 있었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.45-46
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• 2016

As the demand for super tall buildings is currently increased in domestic and foreign countries, some kinds of ultra-high strength concretes are being developed actively. Since the cross section of concrete becomes smaller thanks to such kinds of ultra-high strength concretes, the concrete structures can be much bigger, more gigantic and much ultra-high. And as another benefit which is generated thanks to the enhancement of the durability performance, the maintenance expenses are also saved. However, since low W/B ultra-high concrete has a high possibility that many cracks can occur in the initial period due to the self-shrinkage caused by the self-desiccation as one of the blending characteristics, the problem becomes bigger by influencing the safety of a structure. Therefore, in this study, it is intended to analyze the effects of substituting some limestone-based ultra-high strength mortar with electric arc furnace oxidizing slag fine aggregates on the self-shrinkage of mortar.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2010년도 춘계 학술대회 제22권1호
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• pp.423-424
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• 2010

본 연구에서는 초고층 건물의 시공을 위하여 유기질섬유와 폴리머분말을 혼합한 복합섬유공법을 활용하여 작업성과 내화성능을 만족시키는 고강도 내화 콘크리트를 개발하고자 하였다. 실험결과 폴리믹스의 경우 폭렬방지 및 내부온도 상승 저감에 효과적인 것으로 나타나 기존의 섬유혼입공법과 유사한 수준의 내화성능을 확보하는 것으로 나타났다.