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구획화재 시 배연창 및 배연구가 화재확산지연에 미치는 영향
윤상천(Sang Chun Yoon),지남용(NamYong Jee),이충선(Chung Seon Lee) 한국생활환경학회 2014 한국생활환경학회지 Vol.21 No.3
On occurring fire of high-rise building, smoke vent window may not operate effectively depending on structural characteristics of buildings and outdoor air conditions, as noted in some literature. Therefore, in this study it reviewed the exhaust effect of ventilation system considering outdoor air conditions. Also, reviewed the influence related to the temperature changes inside compartments of ventilation system with the effective area of smoke vent window and the exhaust capacity of ventilator as variables. The fire analysis using Fire Dynamics Simulator (FDS) was conducted for this study. The result showed that the temperature rise of fire compartments can be delayed by the inflow of outdoor air and the delayed effect seems to be affected by total exhaust quantity of ventilation system.
스틸 스터드와 석고보드로 구성된 내력벽체의 내화성능평가 연구
권인규(Kwon In-Kyu),지남용(Jee NamYong) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.8
Steel framed house consisted of load-bearing walls using steel stud 1.0 to 1.2 ㎜ in thickness and finishing materials such as gypsum board or plywood and floor members made of concrete, steel joist and roof members made of steel studs, plywoods and gypsum board was mainly introduced in Korea since 1996 by POSCO. The aim of paper is to evaluate the fire resistant performance of load-bearing wall through loaded-fire tests and unloaded-fire tests according to KS F 2257(1993) and to suggest the new types which meet the minimun requirement of 1 hour fire resistant rating defined at the fire regulation. The newly designed fire testing process for the load bearing-walls designed to experiment firstly in Korea was suggested and adopted by the fire authorities. In 1999, the newly changed fire test method or KS F 2257-1,4,5,6,7 contained the same ways of the applied load for the loaded-fire test. After lots of loaded and unloaded fire test, we could find out that there were a quite different fire resistant characteristics according to the sorts of finishing materials and thickness and whether the application of insulation materials or not. To obtain 1 hour fire rating for the load-bearing wall system with steel studs and gypsum boards, 2 plies of type X were essentially needed.
조홍범(Cho Hongbum),윤상천(Yoon Sangchun),지남용(Jee NamYong) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.4
There are only a few tests to ensure concrete quality before placing in domestic construction site; One is the slump test for workability, the others are the air content test and the chloride content test for durability. The concrete compressive strength which is the one of important factors to influence on concrete quality was tested after 28 days when placed. Methods for early estimation of concrete strength have been introduced for concrete quality control, but such methods are expensive, and required experienced skill and time. Therefore, these have difficulties in situ application for concrete quality control. The subject of this study is the result of 1442 compressive strength tests on 59 different kinds of mix design with specified compressive strength of 180∼270kgf/㎠, water-cement ratio of 0.39∼0.62, Gmax 25㎜, and slump of 12∼15㎝. This study aimed at reviewing application of prediction equation of compressive strength as a means of strength control of ready-mixed concrete, making an regression equation which enables to estimate compressive strength at 28 days by multiple linear regression analysis on the basis of mix proportion of ready-mixed concrete and compressive strength testresults of construction site.
권인규,지남용 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
Steel structures have been used as a good construction method in high-rise building since the early 1970s in Korea. The main merits of the steel structures seem to have much better robust structural entities and more speedy construction period and a more cost competative than the conventional concrete ways. But the steel has property of a decreasing loadbearing capacity when it happens to expose to an unexpected fire condition. For a sustaining of structural stability in fire, structural elements such as beams, columns and structural floor-ceiling assemblies should protect from fire. Traditionally, the floor-ceiling assemblies have already been used in several construction types consisted of steel, concrete and brick. Especially, where the floor-ceiling assemblies apply the steel structure, the fire protection material for beam element should be sprayed so as to meet the requirement of building regulation on fire. Contrary to Korea, the U.S.A. and the other countries, the U.K. Canada, can apply the floor-ceiling assembly without additional fire protection materials to beam element any more provided the authorized design was applied. In order to evaluate the performance of fire resistance for T-Bar type of the floor-ceiling assembly, we conducted 3 fire tests with specimens consisted of the acoustic-tile membrane as a finishing and concrete floor with cellular steel deck and steel beam. From the fire tests we found out that the bare steel beam endured 2 hours and 3 hours for the assembly with 20㎜ thickness of fire protective material to structural beam.
공동주택 바닥의 구법 변화에 따른 단열성능에 관한 연구
김순만,지남용 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
There are little data on floor thermal insulation performance because Korean apartment building floor is an ON-DOL heating system which is made of several elements. In this study, thermal insulation performance according to the element of floor structures were investigated. Through these investigated process, the results can be used to supply constructor and comsumer basis data to estimate thermal insulation performance of apartment building floor.