철물접합재에 의한 목구조 접합부의 수평변위 감소방안

정병주(Jeong Byung-Joo),홍갑표(Hong Kap-Pyo),정한(Jeong Han) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.5

Mechanical connections are defined as those where fasteners penetrate the wood; adhesive connections are not included. Mechanical connections are constructed using two general fastener types dowel and bearing. Dowel type fasteners, such as nails, screws, and bolts, biscuits, transmit either lateral or withdrawal loads. Lateral loads are transmitted by bearing stresses developed between the fastener and the members of the connection. The hanger-type connections are combination of dowel and bearing-type fasteners. Connection design is affected by many of the same factors that influence the strength properties of wood. In addition to the type, number, and size of fasteners, connections strength also depends on such factors as the wood species, direction and duration of load, and conditions of use. In this study wood tendon, steel tendon, steel biscuit connections are compared with each others through the experiment. Shear capacity and cyclic load resisting ability are examined in all connection types. For good fabrication metal connector should be used extensively in wood structure. Comer spring are made of thin angle plate and two torsion spring. They are available in reducing of lateral displacement. Comer springs will be also used in low-strength or nonstructural connections and resist lateral and withdrawal forces.

프리캐스트 경량콘크리트 거푸집을 이용한 콘크리트 보의 휨 거동

정병주(Jeong Byung-Joo),홍갑표(Hong Kap-Pyo),하상운(Ha Sang-Woon) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.5

Light weight concrete is about one half the weight of hard structural concrete. It can be mixed from a variety of light weight aggregates including vermiculite, perlite, scoria, and pumice. Structural lightweight concrete has strengths comparable to normal weight concrete, yet is typically 25% to 35% lighter. This study explores reinforced concrete beams with lightweight includes two general topics. The first is a summary of pertinent literature on application of lightweight concrete in form applications. The results indicate a number of successful applications as well as a few cautions. The second topic outlines in detail the development of 20N㎣ and mixes using locally available materials and mixing practices suitable for local precasting plants. The use of three type lightweight aggregate in concrete as a partial replacement of granite aggregate has been examined and compared. The lightweight concrete specimen so produced is light in nature (up to 14% reduction in unit weight) and the development of such concrete with sintered aggregate minimises the consumption of granite rock. The Investigation was conducted to determine the bond characteristic of deformed bar embedded in light-weight concrete with thin concrete coverage.

지속가능발전 도시를 위한 유비쿼터스 IT의 적용

정병주(Jeong Byung Joo),이영로(Lee Young Ro) 한국통신학회 2008 한국통신학회 학술대회논문집 Vol.2008 No.7

開口部가 있는 코아의 橫剛性에 관한 연구

鄭炳柱 관동대학교 1995 關大論文集 Vol.23 No.1

In many high-rise buildings, the lateral resistance of the structure is provided entirely or partially by the central core which houses the elevatiors and the service ducts of the building. In most cases, the core structure consist of two concrete walls of channel section by lintel beams at floor levels. Due to the symmetrical nature of the structure, the lateral loadings in the X and Y directions, and the torque about the Z-axis can be studied separately. The lateral deformation in the Y dierction can be obtained treating the core as a cantilever beam. The lateral deforamation in the X direction can be obtained treating the structure as a coupled shear wall system. Recently, studies have been carried out to study the torsional behaviour of such structures. Shear core are laced with openings over their height for doors and utilities. The effect of wall openings on the shear core stiffness and in addition, the influence of realtive stiffness of intersecting shear walls on the over all rigidity of shear wall group are difficult to predict. A three dimensional shear wall analytical model which accounts for the effect of wall openings and the relative stiffness of intersecting walls is a necessary addition to existing three-dimensional frame models for multistory buildings.

중소기업 정보화정책과 정보기술 서비스의 성과에 관한 실증연구

정병주,전성현 한국정보사회진흥원 2006 정보화정책 Vol.13 No.1

본 연구는 정부의 중소기업 정보화 지원정책이 정보기술 서비스와 정보기술 운영성과에 미치는 영향, 정보기술 서비스가 정보기술 운영성과에 미치는 영향, 정보기술 운영성과가 조직성과에 미치는 영향을 분석하였다. 분석결과 첫째, 정부정책이 정보기술 서비스에 직접적으로 긍정적인 영향을 미치는 반면, 중소기업의 성과에는 정보기술 서비스를 거쳐 간접적으로 긍정적인 영향을 미치는 것으로 나타났다. 이와 같은 결과는 간접지원방식을 취하고 있는 정부의 정책이 선순환구조의 형성, 즉 정보기술 수요창출에 따른 시장의 활성화로 연결하는데 역할을 하고 있다고 할 수 있다. 이렇듯, 정보기술 서비스 사업자와 중소기업이 상생하기 위해서는 중소기업의 니즈(needs)를 정확하게 파악한 정책과 서비스가 이루어져야 할 것이다. 둘째, 공급자의 정보기술 서비스는 관련 유사연구 결과처럼 중소기업의 정보기술 운영성과에, 운영성과는 조직성과에 직접적으로 긍정적인 영향을 미치는 것으로 나타났다. 따라서 정부는 공급자의 다양한 서비스의 품질을 평가하는 등 중소기업의 상황과 수준에 맞는 서비스가 가능하도록 제도적 장치를 마련하여야 할 것이다.

프리캐스트 콘크리트거푸집을 이용한 콘크리트기둥의 압축거동에 관한 연구

정병주,홍갑표 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.1

In the past, plywood formwork needed Various equipments, accessories, special labor, and complicate processes To use precast form, however, cuts down the process of formwork, the period of construction, the labor cost so It promotes productivity and economical efficiency Therefore, this paper aims for making clear the mechanical and structural rationality of using PC form m order to consult constructional convenience and economical efficiency To determine the compressional behavior and capability of PC form column, this paper compared and analyzed the experiment and analysis results The specimens are assorted the columns using box type PC form, the columns using channel type PC form, general block column, general brick columns, and general reinforced concrete columns The variable of the columns using the PC form are the thickness and space of wiremesh, the strength of filling concrete, the type of PC form The height of specimens is 60cm, the section is 30cm×30cm, the thickness of the PC form is 25cm, the main bar in filling concrete is D16, the tie bar is D10

끼움板과 骨組間의 構造的 接觸面에 관한 硏究

鄭炳柱 관동대학교 1987 關大論文集 Vol.15 No.2

A new method is described which makes use of the concept of a finite element and is thereby able to fined the points of seperation between the frame and the infill, as well as the stress distribution in the contact intervals, as an integral part of the solution. Slip between the frame and the infill is also taken into account by using modified friction elements. Infilled frame structures may, for a variety of these gaps on the behaviour of this structural from an investigation into the infilled frames with or without connectors are analysed by a finite element approach which takes into account nonlinearities of the materials and the structural interface. In order to predict failure and study the entire range of load-deflexion behaviour, cracking, crushing and nonlinearity of infill and yielding of frame are taken into account. The theoretical predictions have been compared with experimental results to demonstrate the varsatioity and accuracy of each analysis.

프리캐스트 콘크리트거푸집을 이용한 보강 콘크리트 보의 휨 거동

하상운,정병주 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.1

The primary objective of this investigation is to study the behavior and determine the ultimate load of laterally and vertically reinforced concrete beams using precast concrete form work subjected to vertical load The authors also propose to derive an empirical formula that can be applied to the design of precast form beam structures at ultimate load Precast form beams can be used as separate elements or In association with other load-bearing elements such as masonry walls The provision of precast form beams In masonry walls increases the wall stiffness, and, reduce the length of process The use of precast form system offers the advantage of utilizing reinforced concrete-filled elements without eliminating the need for formwork Reinforcement increases the bending and shear strength of the elements and also enables the design of cross sections that are smaller than equivalent unreinforced elements The variable of the beams using the PC form are the space of wiremesh The length of specimens is 150cm, the 'Section is 25㎝ × 40cm, the thickness of the PC form is 2.5cm, the main bar In filing concrete is 2-D16 and the tie bar is D10

A Survey of Enterobiasis in 858 Church Summer School Children and Infants in Chungpook Province, Korea

Park, Jeong Yeol,Chung, Byung Joo,Chung, Hae Kun,Choi, Dong Wik 慶北大學校 醫科大學 1974 慶北醫大誌 Vol.15 No.1

충청북도 하계 유년주일학교 아동들에 대한 요충 감염상을 추정하기 위해 Graham씨 scotch tape-swab 변법으로 1회 검사하였다. 아동 858명중 유병률은 41.7%였고 이 가운데서 농촌아동 389명의 유병률은 44.5%였는데 비해 도시아동 268명에서는 39.9%로써 양자간에 유의적 차를 인정할 수 있었다. 남아와 여아에서의 요충 감염률의 차는 인정할 수 없었으나 1970년의 감염률에 비해 1974년도에서는 증가되어 있었다. Eight hundred and fifty-eight children were examined for Enterobius vermicularis. A modified Graham's scotch tape method was employed. All were examined once. The Prevalence among 858 children was 41.7 per cent. The prevalence rate for the worm among 389 rural children was 44.5 per cent; that of 268 urban children was 39.9 per cent. This difference was statistically significant. There was no difference in infection rate with regard to sex. A little increase in the infeciton rate occurred between 1970 and 1974.

A Survey of Enterobiasis in 858 Church Summer School Children and Infants in Chungpook Province, Korea

Park, Jeong Yeol,Chung, Byung Joo,Chung, Hae Kun,Choi, Dong Wik 慶北大學校 醫科大學 1974 慶北醫大雜誌 Vol.15 No.1