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鐵骨桂脚部의 베이스플레이트 두께 변화에 다른 支壓强度에 관한 實驗的 硏究
최문식,민병렬 단국대학교 1998 論文集 Vol.32 No.-
Steel structure, steel reinforced concrete and composite structure has been increasingly used to cover the increased structural load due to the construction of high-rise buildings. Thus when designing the steel structure, it is generally considered difficult to evaluate the appropriate bearing strength of the steel base, upon which large axial load is applied. The impact of steel base to the bearing strength may be various such as to the loaded areas, strength of concrete, shape of base, and steel reinforcing bars. Entire strength of the building is transferred to the reinforced concrete footing through the baseplate. However, in the case of utilizing the baseplate with low bending strength or thin baseplate, it will be hard to estimate the accurate bearing strength upon the concrete footing due to the problem of bending occurrence by which loaded area becomes smaller than baseplate. Therefore, in the reported research, the variation of the bearing strength was analyzed by altering the thickness of steel baseplate and the appropriate estimation method of bearing strength was suggested comparing with the results of other researches.
崔文植 大韓神經精神醫學會 1979 신경정신의학 Vol.18 No.1
In August 1978, in order to determine the prevalence rate and ecological aspects of schizophrenia, manic-depressive illness, epilepsy, and general paresis, this survey was conducted using the census visit method in Juk-Wang Myun where the total population was 7,216 persons. Followings are the results obtained. 1. The prevalence rates for schizophrenia, manic depressive illness, epilepsy and general parsis were 0.15%, 0.013%, 0.19%, and 0.00% respectively. 2. Four-fifths of the schizophrenic(81.8%) and about half of the epileptics (57.1%) had suffered for more than five years. 3. In schizophrenics, the divorced and the separated in both sexes are 45.5%. 4. In therapy, 57.1% of epileptics take anticonvulsants while 54.6% of schizophrenics have not been treated with modern methods or else left alone without custodial cares.
최문식,김보영 단국대학교 2000 論文集 Vol.35 No.-
To study on the shear lag effect in the block shear rupture of joints under tension force, in this report analyzed the research results on block shear rupture of H-shape. CT-shape and L-shape. When computing the block shear internal force in the joints under tension force, by comparing the block shear equations of the Limited State Design criteria. AISC(which do not include the shear lag) with Epstein's equations(which do), the results on the propriety of shear lag reduction coefficient are as follows. 1) Block shear equations of the LRFD(1993) of the AISC do not include the shear lag in the joints under tension force. In the study results, the professional factors of H-shape, CT-shape and L-shape are 1.07, 0.96 and 0.97. Therefore the results show that the block shear equations of the LRFD(1993) of the AISC are not appropriate. 2) In the LRFD(1993) of the AISC and the Limited State Design criteria, when real block shear rupture length and the smaller value of the two reduction coefficient are applied, CT-shape's and L-shape's professional factor is 1.04 and H-shape's is 1.17. Therefore, applying the reduction coefficient to the block shear equation under tension force is quite appropriate for the CT-shape and L-shape. For the H-shape, the results show that a little excessive but safe. 3) In the Adidam and Epstein's equation(1992), when real block shear rupture length and the larger value of the two reduction coefficient are applied, CT-shape's professional factor is 0.98, L-shape's is 1.03, and H-shape's is 1.07. Therefore, it is thought that applying the reduction coefficient is necessary in the block shear equation under tension force and it should be corrected when applying the U factor. 4) From the above results, when computing the block shear internal force, it is thought that reduction coefficient for the shear lag should be considered.
600N급 TMC후판강재를 적용한 기둥과 보 용접접합부의 인성평가
이철제,김종락,김종성,최문식 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
This paper aimed to evaluate the toughness of the 600N class TMC column to beam steel welded joint which subjected to cyclic loading. The specimens were designed as a unit frame of tall building's middle-storeys, and cross type weld connection, 600N class TMC steel were used for column and SM490 for beam. Two tests were carried out. Two specimens were considered to have the same structural property and ductile capacity. The specimen adapted scallop type showed the same toughness value as the speciment used non-scallop type.
인장력을 받는 CT형강 고력볼트 접합부의 감소계수 U값에 관한 연구
윤성호,김진숙,김원식,신영록,김보영,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
The purpose of this experimental study is to investigate the validity of code equation and table to calculate the reduction coefficient for effective net area in the limit state design code of steel structure and offer the basic research data for the effective net area of tee shape members in tension. The experimental tests were performed by loading the specimens through the flange with high strength bolt. Length of connection, number of bolt and the eccentricity are the parameters in test. According to result, the failure loads in test is less than predicted loads and it well showed when the predicted loads are based on reduction coefficient of the table in code. The lateral buckling of stem occurred in the members with big eccentricity and it reduce the failure loads. Therefore, we thought that an additional tests and research on the factors of effective net area is required.
김곤호,김건우,김영우,최영도,김종식,김상진,한승희,홍문표 漢陽大學校 工學技術硏究所 1998 工學技術論文集 Vol.7 No.1
Abstract- In a plasma source ion implantation, the target is successively biased by negative voltage pulses with an intrinsic finite rise time, resulting in the time-dependent sheath formation around the target. Measurement of time-dependent sheath during the pulse rise show the ion matrix sheath development which is in proportion to square root of time and pulse rise rate over plasma density but independent of the ion mass.
고강도 콘크리트(80MPa이상)를 이용한 콘크리트충전강관구조 적용을 위한 기초물성 연구
이장환,강용학,정근호,김진호,정상진,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
One of the most important reasons that CFT is used in many conditions is by using that we can achieve the effect, which reduce the section of the member. This research purpose to find the most ideal composition, which is achieved by the investigation in the concrete's property of matter like ability of Slump, Slump Flow, Air content, Bleeding, and Settlement when the high strength of concrete which is over 80MPa is used m the CFT column.
인장력을 받는 ㄷ형강 고력볼트 접합부의 감소계수 U값에 관한 연구
김진숙,표영석,나승욱,신영록,김보영,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
The purpose of this paper is to examine the influence of reduction coefficient according to the limit state design of steel structures in the bolted joints of tension members. It was carried out the tensile testing about high strength bolted connections performed in structural steel channels. Considered parameters are the number and row of bolts, the connection length, connection eccentricity of the specimen. The test results showed that failures generally came (a) classic net section, (b) block shear failures. We found that the professional factor, obtained by calculating the test failure load divided by the nominal specification strength, is lower than 1.00. We thought that the reason was the moment produced by eccentric loading depends upon the connection geometry as well as the rotational stiffness of the connection.
서중조건하에서의 콘크리트 충전 강관 기둥의 시공을 위한 실험적 연구
이장환,강용학,정근호,김진호,최문식,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
The basic Physical properties, Slump, Slump flow, Air content, Bleeding, and Settlement of concrete was investigated to test Characteristic of Setting and to evaluate the relation between Model specimen and Heat of hydration for construction Over the High Temperature(CFT). The objective of this study is to take the partial core after the cementation of Model specimen, test the compression intensity and analyze the relation to Test piece.