http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
표준화재 재하조건에서 법정슬래브의 내화성능에 관한 실험적 연구
조범연(Cho, Bum-Yean),여인환(Yeo, In-Hwan),김흥열(Kim, Heung-Youl),민병렬(Min, Byung-Yeol),김형준(Kim, Hyung-Jun) 한국화재소방학회 2011 한국화재소방학회 학술대회 논문집 Vol.2011 No.추계
본 연구에서는 현재 법정내화구조로 규정되어 있는 철근콘크리트(RC: Reinforced concrete)조 및 철골철망모르타르(SWM: Steel & Wire Mortar)조 슬래브에 대하여 재하조건에서 구조별 내화성능을 검토하고, 철골철망모르타르조 슬래브에 대해서는 피복두께별 내화성능을 검토하고자 표준화재조건에서 내화실험을 실시하였다. 실험결과 동일피복 두께일 경우 철근콘크리트조 슬래브가 내화성능이 우수한 것으로 나타났으며, 철골철망 모르타르조 슬래브의 경우 피복두께가 10mm 증가 시 7%의 내화성능이 향상되는 것으로 나타났다. 가열 이면온도는 슬래브의 두께가 늘어날수록 낮은 것으로 나타났다.
프리스트레스 파형웨브 합성보의내화성능에 관한 실험적 연구
조범연,김흥열,김형준,강현,김강수,Cho. Bum-Yean,Kim. Heung-Youl,Kim. Hyung-Jun,Kang. Hyun,Kim. Kang-Su 한국방재학회 2014 한국방재학회논문집 Vol.14 No.1
이 연구에서는 장경간을 실현하면서 층고절감의 목적을 동시에 달성하기 위하여 개발된 파형웨브가 적용된 프리스트레스트 매립형 합성보와 일반적인 슬림플로어 보의 내화성능평가를 수행하였다. 내화성능 평가실험에서는 ISO 834 표준화재곡선을 적용하였으며, 주요실험 변수는 프리스트레스의 도입여부, 파형 웹의 형상, 그리고 내화피복의 두께였다. 모든 실험체들은 목적한 화재저항시간보다 더욱 향상된 화재성능을 보여주었으며, 프리스트레스가 도입된 파형웹 합성보는 일반적인 슬림플로어 합성보에 비하여 얇은 내화피복을 적용하였음을 감안하면 매우 우수한 화재저항성능을 보여주었다. In this study, the fire resistance tests were performed on the conventional slim floor beam and the prestressed composite beams with corrugated webs, which is suitable for the long-span structure with a reduction in story height by utilizing the prestress and accordion effect. In the fire test program, the ISO 834 standard fire curve was adopted, and key test variables were effect of prestress, shape of corrugated webs, and thickness of sprayed fire proofing material. All of test specimens showed enhanced fire resistance performances exceeding the expected performance level, and the prestressed composite beams with corrugated webs especially showed the excellent fire performances considering that these specimens had thin fire proofing thickness compared to conventional slim floor specimen.
공동주택에서의 가변성을 고려한 Infill 및 Interface의 성능기준에 관한 연구
조범연(Cho Bum-Yean),이충선(Lee Chung-Seon),지남용(Jee Nam-Yong),박기봉(Park Ki-Bong) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
On SI houses in Japan, infill system is used for curtain wall, service system and interior except structure taking charge internal stress. And, it means that part can be changed by residents. Also, for correspond to variety of lifestyle of resident, infill should be easy to set up, dismantle, and move. It is called Interface that is an concept including condition of junctions, regulations. Because of interface, there must be gaps and its may cause deterioration of properties. To reduce the deterioration of properties, the design for Interface should be planned more than that properties of two materials used at junctions. The survey for regulations and standards has conducted and required performance item and performance evaluation method which can be a basic material of performance-standard of infill are reorganized. With this, common features of required performance item of two parts consisting Interface are fixed for required performance item of Interface. As well as, required performance item of Interface has been acquired with containing necessary items which are not included required performance item of Infill. Next, classes of required performance of Interface are summarized according to KS. Therefore, the object of this research is to give the basic information about performance-standard of infill and interface.
용접한 건축구조용 강재의 고온 시 기계적 특성에 관한 연구
조범연(Cho Bum-Yean),지남용(Jee Nam-Yong) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.12
This research is to show the mechanical properties of structural steels by welding at high temperature. Welding parts are divided with weld metal and HAZ(Heat Affected Zone). HAZ is formed by interval from welding heat source and heating and cooling rates. Then, the change of both microstructure and mechanical properties occurs. Discontinuity of mechanical and chemical property at HAZ is the cause of safety decrease of structure. At this point, in this research, tensile tests at high temperature with test pieces of base metal and weld metal of SS400 and SM490 are accomplished. Furthermore, the effect on steel by welding throughout the microstructure's observation at welding parts and fractural parts. From the results, the mechanical properties of both SS400 and SM490 are standardized without welding or non-welding. Moreover, after tensile tests, The volume fraction of ferrite and pearlite is analyzed with microstructure of fractural parts of test pieces of weld metal. As a result, it is verified that the fragility parts of test pieces of weld metal are base metal.
용접한 건축구조용 강재의 고온 시 기계적 특성에 관한 연구
조범연 ( Bum Yean Cho ),지남용 ( Namyong Jee ) 한국건축시공학회 2009 한국건축시공학회 학술발표대회 논문집 Vol.9 No.2
This research is to show the mechanical properties of structural steels by welding at high temperature. Welding parts are divided with weld metal and HAZ (Heat Affected Zone). HAZ is formed by interval from welding heat source and heating and cooling rates. Then, the change of both microstructure and mechanical properties occurs. Discontinuity of mechanical and chemical property at HAZ is the cause of safety decrease of structure. At this point, in this research, tensile tests at high temperature with test pieces of base metal and weld metal of SS400 and SM490 are accomplished. From the results, the mechanical properties of both SS400 and SM490 are standardized without welding or non-welding.
피복두께에 따른 철골철망 모르타르조 슬래브의 내화성능에 관한 연구
조범연(Cho Bum-Yean),김흥열(Kim Heung-Youl),민병렬(Min Byung-Yeol),김형준(Kim Hyung-Jun),여인환(Yeo In-Hwan) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
Besides Korea, some foreign countries such as Japan, the United States and Germany describe in their building codes the legal fire resistance structure as a commonly used member at the construction sites, which doesn’t need a investigation of the fire resistance performance. On this, it is required an economic and efficient system improvement based on the evaluation results of the Steel Wire Mortar Structure. This study suggests some ways to improve the domestic legal fire resistance construction, analyzing the national and international criteria related.