http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
均質 異方性板에서 龜裂先端 附近의 變位場을 利用한 應力擴大係數 決定에 관한 硏究
陳致燮,崔顯泰,李弘柱 부산대학교 공과대학 1991 工大論文集 Vol.42 No.-
Wood, laminates, reinforced concrete, and some special types of metals systems with controlled grain orientation are often orthotropic and at least rectilinearly anisotropic from point to point, if regarded as homogeneous media. Orthotropic bodies where a crack is not associated with a plane of elastic symmetry may be conveniently treated as a crack problem in a generally anisotropic body. At this work, approach for the determination of the stress intensity factors (SIF) of the homogeneous anisotropic plate using displacement field of near the crack tip is presented. Calculated values are in good agreement with the others.
陳致燮 부산대학교 공과대학 1984 硏究報告 Vol.27 No.-
The effects of solid diaphragms in single-cell curved box-girder bridge examples are studied by using the finite element method of analysis. Composite steel-concrete sections as well as concrete sections of girders are introduced at different span lengths and the effects of diaphragms on the behaviour of the curved box-girder bridge are studied and some recommendations for bridge design are given.
陳致燮,嚴宗煜 부산대학교 공과대학 1986 硏究報告 Vol.32 No.-
A general finite element program is developed to analyze the three dimensional structures connected to plates, with the skewed supprot. In 3-dimensional structures such as folded-plate and shell structures, the element will be subject, generally, both to bending and in-plane forces. In the division of the structure into flat elements, 8 node isoparametric plane stress element and plate bending element are combined with 6th degree of freedom (in-plane rotation) at each node. In the cases of the skewed supprot which is brought out by a special geometry in structures and outer geographical conditions, the technique of the transformation matrices is extended in this program. It is proved that this developed program is more efficient than general package program SAPV-2.
주물공장에서 배출되는 플라이애시를 이용한 시멘트 벽돌의 강도특성에 관한 실험적 연구
진치섭,김희성,신동익 부산대학교 1995 生産技術硏究所論文集 Vol.48 No.-
본 연구는 주물공장 플라이애시의 물리적·화학적 특성을 규명하고 이를 이용한 시멘트 벽돌의 강도 특성을 실험적으로 규명하는 것이다 특히, 주물공장 플라이애시의 성분 분석 결과 분말도가 일반 화력발전소 플라이애시에 비해 3.5배 정도 크게 측정되었다. 이러한 물리적 성질의 차이가 포졸란 활성도와 워커빌리티에서 일반 플라이애시와 서로 다른 메카니즘을 갖게 된다. 시멘트 벽돌은 플라이애시를 시멘트 용적의 0 %, 5 %, 10 %, 15 %, 20 %, 25 %, 30 %, 35 %, 40 %, 45%, 50 % 만큼씩 대체한 각각의 경우에 대해 제작하여 치수, 흡수율 및 압축강도를 측정하였으며 측정 결과 플라이애시를 시멘트 용적의 45 % 까지 대체하여도 KS 규격에서 정한 시멘트 기준치를 만족하는 것을 알 수 있었다. This study dealt with the strength characteristics of cement bricks using casting foundry fly ash. For this purpose, fly ash was sampled Young-Hwa casting foundry and analyzed for physical and chemical properties. As analyzed results of fly ash, fineness of casting foundry fly ash was 3.5 times as much as that of thermoelectric power plant station. Because of this difference, it is expected that pozzolanic activity of concrete using fly ash of casting foundry will be different from another fly ash. Cement Bricks were tested to evaluate brick performance when 0 to 50 percent of the portland cement by volume was replaced with fly ash of casting foundry As a result, we found that the absorption and strength of bricks using casting foundry fly ash were over KS criterion when the fly ash replaced 5∼45 % of volume of cement.
陳致燮,張炳淳,崔顯泰 부산대학교 공과대학 1983 硏究報告 Vol.26 No.-
The majority of bridge decks built today has come form of skew, taper or curve. Because of the increasing restriction on available space for traffic schemes and also due to the increasing speed of the traffic, the alignment of a transportation system can seldom be adjusted for the purpose of reducing the skew or complexity of the bridges. Fortunately this increasing demand for high skew bridges has been accompanied by the development of computer aided methods of analysis. In this paper, a solution scheme is developed by 8-noded isoparametric finite element, and used Mindlin plate in the formulation of the plate bending element. Due to skew, some of the nodes are defined with respect to their local axes, so equilbrium equation which was originally given in global axes must convert by some sort of transformation process. Using above process, supprots of skew decks are appraised eastly and properly. The size of skew effects depend upon the angle of skew, the ratio of width to span, etc. The special characteristics which skew has a considerable effect on the deck's behaviour are as follows. (1) According to increase the angle of skew, maximum principal bending moment, from midpoint at free edge, to obtuse corner. (2) Variation in direction of maximum principal bending moment across width, from near parallel to span at free edge, to near orthogonal to abutment in central regions. (3) Hogging moments near obtuse corner. (4) High reactions and shear forces near obtuse corner. (5) Low reactions and possibly uplift in acute corner. The authors feel that the present approach provides a flexible tool for the analysis of skew bridges.