http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
경골형 교량거더의 비틀림에 의한 말뚝연결부 응력저감기법
김재형(Kim, Jae-Heong),윤경민(Yun, Kyung-Min),윤기용(Yoon Ki-Yong),이진옥(Lee, Chin-Ok),임남형(Lim, Nam-Hyoung) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.4
조립식지그재그 형태의 단일거더시스템이 적용되는 경골형 교량은 비틀림에 취약한 구조이다.특히 거더와 PHC(PretensionedspunHighstrengthConcrete)말뚝의 고정 연결부는 비틀림 하중에 의한 과도한 응력이 집중되는 취약부 이므로 이를 저감시키기 위한 방안이 요구된다.본 연구에서는 연결부에 발생하는 과도한 응력을 저감시키기 위한 다양한 보강재 형식의 효율성을 수치해석적으로 평가하였다. A fish-bone type bridge is vulnerable to the torsional behavior due to the single girder system with planar zigzag conformation. The fixed connecting area between the girder and pier is the special weak point because the torsional load creates excessive stress concentration. Therefore, the method to reduce the stress concentration is required. In this study, the reduction efficiency of various reinforcing types to reduce the excessive stress occurring at the connecting area is evaluated by using numerical analyses.
Quantitation of Formate in Plants and Its Enhancement in Response to Environmental Stresses
Jae Kwang Kim,Myoung Rae Cho,Hyung Jin Baek,Tae Hun Ryu,Jung Bong Kim,Jun Heong Kim,Myong Jo Kim,Chang Yeon Yu,Ei Ichiro Fukusaki,Akio Kobayashi 한국응용생명화학회 2007 Journal of Applied Biological Chemistry (J. Appl. Vol.50 No.4
Extrusion of honeycomb monoliths employed with activated carbon-LDPE hybrid materials
Jae-Woo Lim,Jin-Heong Yim,Yunho Choi,Hee-Seung Yoon,Young-Kwon Park,Jong-Ki Jeon 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.1
A facile preparation method of activated carbon (AC) honeycomb monoliths is suggested in this work. A composite consisting of activated carbon, organic polymer binder (LDPE), and organic lubricant was effectively extruded above themelting temperature of the organic polymer in the shape of a honeycomb monoliths (dimensions: 256 cells in 4 cm 4 cm). Three types of AC powders are investigated to elucidate the relationships between the processibility of the honeycomb monoliths and the size of their AC particles. The surface area of activated carbon filters increases as the size of the AC particle increases. This may be due to pore blocking by organic polymer binder on the surface of the AC particle. The mechanical properties of the honeycomb monolith are enhanced drastically when extrusion molding is used as compared to the use of a conventional press-molding process.