• Fire Science and Engineering
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• v.25 no.6
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• pp.51-57
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• 2011

The domestic wooden cultural properties applied to the sprinkler extinguishing system was confirmed extinguishing performance through fire experiments. Consists of wooden cultural properties of a fire, a flammable material is vulnerable in terms of. The scale of fire will occur to vary appearance of the initial fire in case of arson. Sprinkler nozzles of the characteristics, the discharging pressure is 1 bar and the flow rate is 80 lpm, applied in this experiment. Fire performance experiments were tested in two separated in each of the scale of the fire and cultural properties. Fire extinguishing performance test results was low in high ceilings and two or more units of the fire scale. Fire growth environment of the actual wooden cultural properties to experimental models when you consider that it is more vulnerable, sprinkler extinguishing system is required sufficient verification in order to apply fire protection of the wooden cultural properties.

• Journal of the Architectural Institute of Korea Structure & Construction
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• v.33 no.12
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• pp.37-44
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• 2017

Due to structural characteristics, construction costs and duration of a modular system would be saved by minimizing the schedule on the job site. As such, it is crucial to develop a connection that can guarantee stiffness while allowing for simple assembling. Particularly, the mid- to high-rise construction of the modular system necessitates the securing of the structural stability and seismic performance of multi-unit frames and connections, and thus, the stiffness of unit-assembled structures needs to be re-evaluated and designed. However, evaluating a frame consisting of slender members and reinforcing materials is a complicated process. Therefore, the present study aims to examine the structural characteristics of a modular unit connection based a method for reinforcing connection brackets and hinges while minimizing the loss of the cross section. Toward this end, the study modeled the beam-to-column connection of a modular system with the proposed connection, and produced a specimen which was used to perform a cycling loading test. The study compared the initial stiffness, the attributes of the hysteretic behavior, and the maximum flexural moment, and observed whether the model acquired the seismic performance, compared to the flexural strength of the steel moment frame connection that is required by the Korean Building Code. The test results showed that the proposed connection produced a similar initial stiffness value to that of the theoretical equation, and its maximum strength exceeded the theoretical strength. Furthermore, the model with a larger ceiling bracket showed higher seismic performance, which was further increased by the reinforcement of the plate.

• Journal of the Architectural Institute of Korea Structure & Construction
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• v.34 no.4
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• pp.25-33
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• 2018

In regard to modular systems, new methods, as well as middle and high-story unit design ideas, are currently being studied. These studies need to focus on the enhanced stiffness and seismic performance of these connections, and see that the development of fully restrained moment connections can improve the seismic performance. For this reason, this study evaluates the performance of the connections of the ceiling bracket-typed modular system through repeated loading tests and analyses. In order to compare them with these modular units, new unit specimens with the bracket connection being different from that of the traditional modular unit specimens were designed, and the results of repeated loading tests were analyzed. In the traditional units, the structural performances of both welding connection and bolt connection were evaluated. In regard to the testing results, the initial stiffness of the hysteresis curve was compared with the theoretical initial stiffness, and the features of all specimens were also analyzed with regard to the maximum moment. In addition, the test results were examined with regard to the connection flexural strength of the steel special moment frame specified under the construction criteria KBC2016. The connections, which were proposed in the test results, were found to be fully restrained moment connections for designing strong column-weak beams and meeting the requirements of seismic performance of special moment frames.

• Fire Science and Engineering
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• v.25 no.5
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• pp.1-7
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• 2011

In this study, standards and test methods for building materials of domestic and foreign countries were compared and analyzed to propose evaluation methods for the fire-retardant performance of HANOK components (Traditional house). IBC and NFPA codes recently have been adopted in the US, and the properties such as critical heat flux, fire spread index and smoke density are being used as an evaluation reference. In Europe, the unified Euroclass has been adopted and the surface flammability, prototype fire test or cone calorimeter test are conducted for the performance test. Japan has the similar system as Korea where the class is classified into 3 grades. We tried to study a quantitative evaluation method of fire retardant performance for the HANOK components based on the analysis results of the several countries' standards and test methods for building materials.

• Fire Science and Engineering
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• v.33 no.4
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• pp.1-8
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• 2019

Reaction-to-fire performance of pipe insulation materials should be approved in accordance with KS standards prior to installing water-based suppression systems because several fire accidents are initiated from insulation materials around ceilings or concealed space. A small room test to evaluate the reaction-to-fire performance of the polyethylene foam and elastomeric pipe insulation materials was conducted according to ISO 20632. Different fire growth rate and heat release rate are observed depending on the materials and construction methods. In order to improve a fire safety, the reaction-to-fire performance of pipe insulation material needs to be subdivided with regard to the heat release rate and smoke generation. Furthermore, the characteristics of the applying space are also required to be considered. Subsidiary materials for installation process such as tape and adhesive are found to provide an adverse effect to maintain a fire safety.

• Journal of Korean Medical classics
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• v.19 no.3
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• pp.260-273
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• 2006

본과제종림상실천각도탐토료장우화자혈법대후세의학적영향(本課題從臨床實踐角度探討了張于和刺血法對後世醫學的影響). 문중나열종원(文中羅列從元), 명(明), 청지현대적19위의가용자혈법치료질병적경험, 무론종병종(無論從病種), 병위(病位), 용혈화침자공구방면(用穴和針刺工具方面), 재장자화기초상도유료흔대발전. 특별시재외과화후과방면(特別是在外科和喉科方面), 경시풍부다채, 현시료차료법적생명력(顯示了此療法的生命力). 통과본과제적연구득출여하결론(通過本科題的硏究得出如下結論). 장자화재외과천장취환부방혈(張子和在外科擅長取患部放血), 경원(經元), 명(明), 청(淸), 연용도금천(沿用到今天), 시장씨영향력적최대증명(是張氏影響力的最大證明). 기차(其次), 장자화지후적명대(張子和之後的明代), 외과운용자혈법적병종대증(外科運用刺血法的病種大增), 포괄정창, 시독(時毒), 발배(發背), 뇌저(腦疽), 투침지, 오양, 연진창(緣唇瘡), 역양등, 발전료장씨지학(發展了張氏之學). 우기재후과(尤其在喉科), 출현계승여발전적명현궤적(出現繼承與發展的明顯軌跡), 장자화용소상(張子和用少商), 환부치후비(患部治喉痺), 지명대증가십의(至明代增加十宜), 삼상(三商), 청대증가곡지, 위중(委中), 양교(陽交), 간사(間使), 대릉(大陵), 도현대칙재증가이혈(到現代則再增加耳穴), 대추(大椎), 천계등(天桂等).

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.32 no.10
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• pp.17-21
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• 2003

국내 화장실 양변기의 배수 및 세정소음에 관한 실험실 측정결과를 소개하고자 한다. 1989년 대한주택공사에서 조사한 설문조사에 의하면 공동주택에서 외부로부터 들리는 소음에 대한 불만을 조사한 결과, 바닥충격음, 급배수설비 소음, 그리고, 공기전달음의 순으로 나타났다. 이와 같이 급배수시 발생소음은 공동주택 입주자의 주요한 민원중의 하나이다. 급배수설비 소음은 유체의 유동에 의하여 발생하며, 직접 공기중을 전파하여 가는 “공기전달음”과 배관지지 재료 및 구조체 등을 통해 재차 공기중을 전파하여가는 “고체전달음” 으로 구분된다. 여기서 “공기전달음”이란 실내에서 발생한 소리가 구조체를 진동하고 구조체는 인접실의 구조체 주변의 공기를 진동하여 소리가 방사되거나 또는 인접실간에 열려 있는 통로를 거쳐 전달되는 소음을 말하고 “고체전달음”이란 음원이 접하고 있는 건물구조체를 통하여 진동의 형태로 전달되는 소음을 일컫는다. 공동주택에서 배수관은 아래층 천장배관에 해당되므로 배수관에서 발생하는 소음은 아래층으로 직접 전달된다. 이러한 배수설비 소음은 배관재의 종류, 배관스페이스의 구조 및 위치 등에 따라 소음레벨이 달라지게 된다.(중략)

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.10a
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• pp.121-124
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• 2008

본 연구는 거주자를 고려한 색채계획에 기초자료로 활용되고자 주거공간의 색채계획 실태와 선호하는 색채를 파악하고, 이를 사용자 측면에서 평가하였다. 연구결과는 다음과 같다. 첫째, 거주자들은 마감재를 선택하는데 있어서 특정한 한 가지 요인보다는 여러 가지 요인을 동시에 고려한다. 둘째, 주거공간에서 색채는 실내분위기를 결정하는데 중요한 요소라고 평가하고 있음을 알 수 있다. 셋째, 현재 거실공간과 부부침실의 경우 천장과 벽의 색상(Hue)은 N(흰색)계열이었고, 색조(Tone)는 밝은 톤으로 마감되어 있음을 알 수 있다. 이러한 색채계획에 관한 만족도는 보통인 것으로 나타났다. 넷째, 거실공간과 부부침실에서 가장 선호되는 마감색채는 현재의 것과 동일하게 나타났지만, 현재 마감된 색채보다는 색채종류가 더 다양함을 알 수 있었다.

• KIEAE Journal
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• v.2 no.1
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• pp.41-48
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• 2002

This study aims to investigate and evaluate the room acoustic designs of a multi purpose gymnasiums which do not use adjustable treatments in order to change the acoustical characteristics. Considering the main uses of gymnasium and auditorium, experiments were carried out using both nondirectional speakers on the stage and loudspeaker installed on the ceiling. The result from the study are as follows; Measured RT under unoccupied condition was a little longer than the expected value, therefore, in the case of occupied condition RT would be close to the optimum value. However, parameters that evaluate intelligibility and speech transmission property appeared to be low and have large differences depending on the measuring points, therefore, more effective sound reflecting surfaces and sound reinforcement systems should be considered.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2008.04a
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• pp.117-119
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• 2008

It is very important to protect life, property at sea from any fire. Recommendation on improved fire test procedures for surface flammability of bulkhead, ceiling and deck finish materials specifies a procedure for measuring fire characterizing their flammability and thus their suitability for use in marine construction. In this paper, we investigated the positive expected by fire test procedures for flammability of bulkhead, ceiling and deck finish materials. Also, unusual materials were analyzed. Finally, we suggest methods to solve several problems related to unusual materials.