건물의 개구부 크기에 따른 외벽 수열온도분포에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2020 한국건축시공학회지 Vol.20 No.3

본 연구는 공동주택의 화재 및 화재확산에 의한 피해의 예방과 대응마련을 위해 실내화재 조건에 대한 정확한 데이터 확보를 목적으로 실물화재실험을 재현하였다. 실험조건으로 개구부 크기를 다르게 하여 외벽 수열온도를 측정 및 분석하였으며, 다음과 같은 결과를 도출하였다. 개구부 크기를 2,000㎜, 1,600㎜, 1,400㎜로 실험하였을 때, 플래시오버는 각각 630초, 505초, 510초에서 일어났으며, 총 가열시간은 개구부 크기에 따라 815초, 713초, 721초로 나타났다. 개구부 크기에 의한 외벽 최고 수열온도는 2,000㎜에서 282.4℃, 1,600㎜에서 382.9℃, 1,400㎜에서 423.8℃로 나타나 개구부의 크기가 작아질수록 화재확산에 의한 외벽의 수열온도는 높아지는 것으로 나타났다. This study used a real-scale model experiment to reproduce internal fires in residential buildings such as a multi-dwelling unit, in order to prevent damage caused by tens of thousands of fires witnessed each year and to take measures to cope with them. For experimental conditions, different opening sizes were applied to measure and analyze the heating temperature of the exterior wall. Results drawn are as following: when the experiment was conducted with opening sizes(horizontal length) each at 2,000㎜, 1,600㎜, and 1,400㎜, the flashover occurred at 630 seconds, 505 seconds and 510 seconds, respectively. Also, the total heating time, in proportion to this, came to 815 seconds, 713 seconds and 721 seconds. The maximum heating temperature of the exterior wall by the opening size reached 282.4℃ at 2,000mm, 382.9℃ at 1,600㎜, and 423.8℃ at 1,400㎜. This represented that as the opening size gets smaller, the heating temperature of the exterior wall by fire spread becomes higher.

굴 패각을 채움재로 사용한 모르타르의 내화성능에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1

Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. So we produced mortar test piece using grounded oyster shell powder according to Filler and reviewed Fireproof Performance.

굴 패각의 조립률 및 양생방법에 따른 강도특성에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),유남규 ( You Nam-gyu ),송승리 ( Song Seung-li ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.1

Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. So we produced mortar test piece using grounded oyster shell according to aggregate and reviewed strength characteristic. Therefore, in this study, the strength characteristics of the test specimen are evaluated by artificially altering fineness modulus and curing method by processing oyster shells.

개구부 상부 차양설치 및 길이에 따른 외벽 수열온도분포에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2020 한국건축시공학회지 Vol.20 No.4

본 연구는 매년 수만 건 발생되는 화재에서 화재확산에 의한 피해 예방과 대응 마련을 위해 공동주택 및 일반건물의 내부화재를 실물화재실험을 통해 재현하였다. 또한, 개구부 크기와 차양길이 조건을 달리하고 이에 따른 외벽온도 분포를 분석하여 화재확산방지 기초자료를 제공하고자 하였다. 실험결과, 차양을 설치하지 않았을 때 최고온도는 약 380℃ 이상으로 나타났다. 차양을 설치하지 않은 최고온도를 기준으로 차양길이가 150mm 일 때, 동일한 측정점에서 약 90℃가량 낮아졌으며, 300mm에서 약 150℃ 이상, 450mm에서 175℃ 이상 온도가 낮아졌으며, 차양길이 600mm 일 때, 최고온도 차는 약 180℃ 이상 낮아지는 것으로 나타나 개구부 상부의 차양 설치가 외벽의 수직화재 확산에 의한 화염온도를 낮추는데 효과가 있는 것으로 판단된다. This study used a real-scale model experiment to reproduce internal fires in residential buildings such as a multi-dwelling unit, in order to prevent damage caused by tens of thousands of fires witnessed each year and to take measures to cope with them. For experimental conditions, different opening sizes were applied to measure and analyze the heating temperature of the exterior wall. Results drawn are as follow : On top of this, the experimental conditions had whether to install shading and put a shading length differently, before measuring and analyzing the heating temperature of the exterior wall. Subsequent results were drawn as shown below. Based on the maximum temperature, the temperature was lowered as much as around 90℃ at 150mm, around 150℃ or over at 300mm and over 175℃ at 450mm. It also turned out that the difference in maximum temperature dropped by around 180℃ or over. This indicated that the shading installation works well in lowering flame temperature generated by fire spread of the exterior wall.

굴 패각과 건식공정 바텀애시를 사용한 내화보드의 가열실험

정의인 ( Ui-in Jung ),김봉주 ( Bong-joo Kim ),김진만 ( Jin-man Kim ) 한국건축시공학회 2016 한국건축시공학회지 Vol.16 No.3

본 연구는 산업폐기물로 발생되는 굴 패각과 건식공정바텀애시를 골재로 활용하여 제작된 내화보드의 가열실험을 통한 성능에 관한 연구이며 다음과 같은 결론을 도출하였다. 전기로 가열실험을 통해 나타난 시험편의 이면온도는 300℃ 가열상황에서 103.1℃∼125.1℃로, 600℃의 가열상황에서 201.1℃∼210.1℃로, 900℃의 가열상황에서 249.2℃∼276.9℃의 범위로 나타났다. 내화보드 시험편의 경우 일정온도상승 이후 유지되는 것으로 나타나 사용재료들의 경우 내화성능이 발휘되는 것으로 판단된다. 실험의 결과로 유추할 때, 입자의 크기가 작을 경우 600℃까지는 내화성능이 상대적으로 우수하지만, 그 이상의 온도에서는 입자의 크기가 큰 경우 많은 공극을 포함하여 열전달이 지연되는 것으로 판단된다. This study is a research about performance of fireproof board using industrial waste such as oyster shell and dry process bottom ash through the heating test and conclusions were obtained as follows. Test samples show back side temperatures as follows : in 300℃, 103.1∼125.1℃, in 600℃, 201.1∼210.1℃, in 900℃, 249.2∼276.9℃. In the test, temperature increases of specimens of fireproof board are kept at certain temperatures hence it could be concluded that the specimens withstand high temperatures. According to the test, it could be concluded that fireproof board made by smaller particles shows better performance up to 600℃ while at higher temperatures, fireproof board made by bigger particles shows better performance. It is estimated that fireproof board made by particles of bigger size has more pore structure and it delays heat conduction.

굴 패각을 잔골재로 사용한 모르타르의 질량비 변화에 따른 강도특성에 관한 연구

정의인 ( Jung Ui-in ),유남규 ( Yu Nam-gyu ),홍상훈 ( Hong Sang-hun ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),최호림 ( Choi Ho-rim ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2

Oyster shell is produced by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to sand. So we produced mortar test using different law of multiple proportions of grounded oyster shell powder of its particle size according to fine aggregate standard and reviewed strength Properties.

굴 패각을 잔골재로 활용한 내화모르타르의 잔존강도 특성

정의인,김봉주,Jung, Ui-In,Kim, Bong-Joo 한국건축시공학회 2017 한국건축시공학회지 Vol.17 No.5

본 연구는 산업폐기물로 발생되는 굴 패각을 세척, 건조 및 가공하여 3개의 입도범위로 분급하였다. 이를 이용해 일정한 비율로 잔골재를 대체한 모르타르 실험체를 제작하였으며, 28일 재령을 기준으로 $300^{\circ}C$, $600^{\circ}C$, $900^{\circ}C$의 가열조건에 의해 실험체를 가열하였다. 재령 28일에서 Plain 휨 강도는 9.2MPa로 나타났으며, O 0.15에서는 대체율에 따라 7.9~4.4MPa로 나타났다. O 1.2~2.5에서는 대체율에 따라 7.7~4.4MPa으로 나타났으며, 마지막으로 O 2.5~5.0의 경우에는 대체율에 따라 8.8MPa,~6.1MPa로 나타났다. 재령 28일 압축강도의 경우, O 0.15에서는 대체율에 따라 23.6~43.2MPa의 차이를 나타냈으며, O 1.2~2.5에서는 대체율에 따라 20.4~45.1MPa의 차이로 나타났고, 마지막으로 O 2.5~5.0의 경우 17.1~40.4MPa의 차이가 나타났다. 가열을 통해 잔존강도를 측정한 결과 굴 패각 잔골재 O 0.15 이하를 100% 대체한 경우 강도감소율이 가장 낮은 것으로 나타났으며, 이러한 결과를 통해 굴 패각의 가공 및 적정 배합을 통한 내열성능 발휘가 가능할 것으로 예상된다. This study classified oyster shells that produced as a industrial waste into 3 distribution by washing, drying and processing them. Mortar specimens with a constant ratio by using this to substitute fine aggregates were made, and the specimens were heated under the heating conditions of $300^{\circ}C$, $600^{\circ}C$ and $900^{\circ}C$ based on the 28-day age. On the age of 28 days, the plain flexural strength was found to be 9.2MPa, and in O 0.15, it was shown to be 4.4~7.9MPa depending on the substitution rate. It was found to be 4.4~7.7MPa in O 1.2~2.5 depending on the substitution rate, and last but not least, it was shown to be 6.1~8.8MPa in case of O 2.5~5.0 depending on the substitution rate. In case of the compressive strength of the 28-day age, it showed the difference of 23.6~43.2MPa in O 0.15 depending on the substitution rate, and 20.4~45.1MPa in O 1.2~2.5 depending on the substitution rate, and last but not least, 17.1~40.4MPa in case of O 2.5~5.0. As a result of measuring the residual strength through heating, in case of substituting fine aggregates less than O 0.15 by 100%, it showed the lowest strength reduction ratio, and it is expected that the heat-resisting property could be achieved through processing and proper mixing of oyster shells through these results.

HILS 시계열 데이터 이미지 변환을 이용한 CNN 기반 자동화 검증에 대한 연구

정의인(Ui-in Jung),김두기(Doogie Kim),백승빈(Seungbin Baek),황지은(Jieun Hwang),김범섭(Beomseop Kim) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11

In this paper, we propose a framework of automated validation for HILS test data that is time dependent based on CNN using image encoding. Recently, electric vehicles and automated driving technologies have developed and ECU in vehicles is more complex. As a result, validation of ECU in vehicles is becoming important. HILS can reduce time and resources for test and validation of ECU. But amount of test is increased rapidly. To solve these problem, automated validation for HILS test data is studying. But it is difficult to find that consider the time dependent characteristics of time series data. In the study, image encoding used on other engineering field is applied to convert multivariate HILS data to image and introduce framework of automated validation for HILS test data based on CNN through validation performance about MDPS HILS data.

커터 밀 인버터의 속도변화에 따른 굴 패각의 입도분포에 관한 연구

정의인 ( Jung Ui-in ),허민회 ( Heo Min-hoe ),유남규 ( Yu Nam-gyu ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),박정훈 ( Park Jung-hun ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2

Oyster shell is light weighted and its strength characteristic is similar to sand so we have reviewed to find its suitability of aggregate. Therefore we found fineness modulus and size distribution of oyster shell by grinding it with inverter cutter mill varying inverter speed and screening size. In our test, the fineness modulus has tendency of decrease in higher speed and tendency of increase in bigger diameter of screening size. 5∼2.5㎜, 2.5∼1.2㎜, 1.2∼0.6㎜, and below 0.6㎜ of oyster shell particle size could be used in further test for suitability of aggregate.

분급된 굴 패각을 잔골재로 사용한 모르타르의 강도특성에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),최인권 ( Choi In-kwon ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),박정훈 ( Park Jung-hun ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2

Oyster shell is produced by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and its strength characteristic is similar to sand. So we produced mortar test piece using grounded oyster shell powder under 0.6mm, 0.6~1.2mm, 1.2~2.5mm, 2.5~5.0mm of its particle size according to fine aggregate standard and reviewed strength Properties.