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벨트트러스를 사용한 철골 모멘트골조의 하중지지능력 평가
김정환 ( Jung Hwan Kim ),정시정 ( Jung Si Jung ),최재혁 ( Jae Hyouk Choi ) 조선대학교 공학기술연구원 2011 공학기술논문지 Vol.4 No.1
Recently, some building structure have been collapsed because of losses of vertical load carrying capacities occured from accidental events. Even, if buildings are partially damaged by accidental event that have not been foreseen, a specific design technique, by which the damage does not cause fatal gravitational collapse or progressive collapse. however, technique to improve load carrying capacities efficiently are required. Consequently, in this study limit analysis is an example of collapse case resulting from a vertical load. Also we considered a change progress of load carrying capacity according to circumstances about installation of belt truss It was widely used in horizontal displacement control of building. Then, to analyze an effect from loss of number generated by accidentally externel force which has an effect on load carrying capacity of building.
기상이변에 대응하는 차세대 장경간 비닐하우스 구조시스템 제안
정시정(Jeong, Si-Jeong),정슬기(Jung, Seul-Ki),김현진(Kim, Hyun-Jin),최재혁(Choi, Jae-Hyouk) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.2
Weather disaster-triggering damage to agricultural facilities in Korea is repeated year after year. Accordingly, anti-disaster technologies must be urgently developed for the secure and safe operation of farm household facilities. Recently, agricultural facilities have been requiring large-scale facilities for expanded productivity. In proposing new facilities, reviews should be carried out regarding their level of technology and the possibility of material supply by manufacturers in existing regions. In this paper, to propose a structural system for a low-cost future-generation pipe house with a long span, which will secure structural safety and large spaces in the existing construction environment.
기상이변에 대응하는 차세대 장경간 비닐하우스 구조시스템 제안
정시정 ( Jeong Si-jeong ),정슬기 ( Jung Seul-ki ),김현진 ( Kim Hyun-jin ),최재혁 ( Choi Jae-hyouk ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.2
Weather disaster-triggering damage to agricultural facilities in Korea is repeated year after year. Accordingly, anti-disaster technologies must be urgently developed for the secure and safe operation of farm household facilities. Recently, agricultural facilities have been requiring large-scale facilities for expanded productivity. In proposing new facilities, reviews should be carried out regarding their level of technology and the possibility of material supply by manufacturers in existing regions. In this paper, to propose a structural system for a low-cost future-generation pipe house with a long span, which will secure structural safety and large spaces in the existing construction environment.
이세준 ( Lee Se-jun ),정시정 ( Jung Si-jung ),김현수 ( Kim Hyun-soo ),장호주 ( Jang Ho-ju ),최재혁 ( Choi Jae-hyouk ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.2
In This paper, it is analyzed how to strengthen the green house effectively to against heavy snow. In order to repair of green house, several strengthen method was proposed and also analyzed a repair strengthen effect by using CPM.
류장진,장재길,이병규,정시정,김성진,김광종 한국산업위생학회 2003 한국산업보건학회지 Vol.13 No.2
In tunnel construction work. major dust-generating activities are blasting rock, rock drilling and transport operations. The aim of this study was to find the characterisitic of particle size of dusts which were generated during road tunnel construction work using the New Austrian Tunneling Method(NATM). An 8-stage personal cascade impactor was used for particle size-selective sampling by area sampilng method. Paired samples for total(closed-face 37-mm cassette holder)and respirable(10 mm nylon cyclone) dust were taken to compare with the results of cascade impactor at the same location where cascade impactor samples were taken, The geometric mean of mass median aerodynamic diameter(MMAD) of dust is 3.9(GSD=4.3). This is quite similar to 50% cut size(4.0 ) for respirable mass fraction defined in the ACGIH TLV. The mass fraction of inhalable, thoracic, and respirable particulate defined at ACGIH TLV are 84.0%, 67.2% and 43.1%, respectively. The arithmetic mean ratio of inhalable particulate mass to respirable particulate mass is 2.04 for paired sample, 1.95 for cascade impamtor sample, which showed much lower than those of other construction tasks. We conclude that the dust generated during road tunnel excavation has about 50% respirable fraction in inhalable particulate mass.