노인과 소아 급성 충수염에 관한 임상적 고찰

성기태,홍기웅,이용창,박용철 대한외과학회 1981 Annals of Surgical Treatment and Research Vol.23 No.2

RC로 구속된 조적조 벽체의 전단강도에 관한 실험적 연구

성기태,김경태 忠州大學校 2005 한국교통대학교 논문집 Vol.40 No.2

In order to investigate the effect of the height of application point of lateral loads and reinforcing steel bars in walls and columns in improving the seismic behavior of confined concrete block masonry walls, an experimental research program is conducted. A total of four one-half scale specimens are tested under repeated lateral loads. Specimens are tested to failure with increasing maximum lateral drifts while a vertical axial load was applied and maintained constant.The constant vertical axial stresses applied are 0, 0.84 and 1.80MPa, while the amount of reinforcements in horizontal and vertical directions are 0%, 0.08% and 0.18% respectively. Test results obtained for each specimen include cracking patterns, load-deflection data, and strains in reinforcement and walls in critical locations. Analysis of test data showed that above parameters generate a considerable effect on the seismic performance of confined concrete block masonry walls.

基礎-地盤 相互作用계의 묻힘效果에 대한 硏究

成基泰,孫榮浩 충주대 산업과학기술연구소 1995 産業科學論文集 Vol.3 No.-

The dynamic interaction system of foundation - soil is analyzed in semi-infinite soil medium and embedded 2-D foundation which subjected to elastic wave. This analysis offered theoretical basis in the interaction system of soil-structure that can be certainly accompanied in seismic analysis of structure. Inducing the theory which can be considered embedment effect of foundation, stiffness ratio of incidence and wave tenth of incident wave, this study practiced numerical analysis which are based on this theory. The results of this study are summarized as follows. First, Using the BEM in semi-infinite soil medium, wave reflection phenomena, occured by discretization as FEM, was removed in fictitious boundary. Second, Radiation damping was taken into account automatically due to use of the fundamental solution. Third, Using FEM in foundation, the analysis of dynamic interaction is possible by applying this study's theory and the course of numerical analysis in foundation which consist in a stratified structure.

에폭시 콘크리트를 사용한 조립식 교량 상판 연결부의 피로거동에 과한 실험적 연구

成基泰,李丞鏞 충주대 산업과학기술연구소 2000 産業科學論文集 Vol.8 No.-

열화손상이 발생된 교량 상판의 보수를 위해서는 교통흐름의 지체, 대중의 불편함 및 경제적인 손실이 불가피하다. 그러므로, 교통량이 적은 시간대에 신속하게 교량 상판을 보수 또는 교체할 수 있는 공법의 적용이 바람직하다. 이러한 공법 중의 하나가 조립식 교량 상판을 현장에서 에폭시 콘크리트로 연결하는 방법이다. 따라서, 본 연구는 이 방법을 사용하였을 때 에폭시 콘크리트 연결부의 역학적 특성과 이상 유무를 파악할 목적으로 실험적 연구를 실시하였다. 그 결과, 조립식 교량 상판의 에폭시 콘크리트 연결부는 최대 설계활하중을 초과하는 반복하중이 작용하여도 충분한 피로강도를 갖고 있음을 알 수 있었다. 또한, 연결부 경계면의 분리나 철근 겹이음부의 미끄러짐은 나타나지 않아 조립식 상판 콘크리트와 에폭시 콘크리트는 일체로 거동함을 확인할 수 있었다. Rehabilitation of the deteriorated bridge decks causes travel delay, public inconvenience and economic loss. Therefore, it is desirable to adopt deck replacement techniques that allow repair work to be completed rapidly during the periods of low traffic volume. Precast deck method using epoxy concrete is satisfactory for that purpose. The experimental study is performed to investigate the mechanical behavior and safety of precast deck joints using epoxy concrete. The results show that epoxy concrete joints in precast deck have a sufficient fatigue strength under the cyclic load beyond maximum design live load. And the interface between epoxy concrete and precast concrete is not separated, so it is concluded that precast concrete and epoxy concrete behavior like one material.

養生條件이 콘크리트强度에 미치는 影響에 關한 硏究

成基泰 忠州大學校 1982 한국교통대학교 논문집 Vol.15 No.2

Curing means the Iast stage of work under the stage execution of work to make Concrete, and it needs a definite period of time of curing to get Concrete needed. Moreover nowadays because we faces the problems of the reduction of constructive terms, rationalization of execution, the process of its manufactures, and its economic gains, We must investigate thoroughly from a new point of view upon consideration of the above matters. Therefore this report is to study on the Influence on the strength of concrete under the curing condition in that light. As we added overload in the earlier time, it didn't make crack of breaking at once, the deflection by creep brought about crack. We observing the influence of freezing on the strength of concrete, the curing under atmosphere showed lower strength from 61% to 70% under the water ouring. The rapid change of temperature and cooling were due to crack on the surface.

部分 Prestressed Concrete 휨部材의 균열에 관한 硏究

成基泰 충주대학교 1993 한국교통대학교 논문집 Vol.27 No.-

The extensive use of high strength prestressing steel requires an evalution of crack width development in prestressed concrete structures. The object of this research is to experimentally investigate the cracking behavior on the partially investigate the cracking behavior on the partially prestressed concrete T-beams and to compare the test results with the formula presented for the prediction of the maximum flexural crack spacing and width in members with reinforcing and prestrssing. The test results indicate that the effect of prestressing on the control of creack width is clear under service load, but increment of crack width is rapid as the degree of prestress is high. The formula for the prediction of creack width in reinforced concrete members without prestressing is used with some modification. Numerical comparisons of the test results and Nawy and Huang formula for the prediction of crack width in prestressed concrete members indicate more satisfactory agreement than the formula for the prediction of crack width in reinforced concrete members with some modification.

비균질 점탄성 지반에서의 지진파 소산

성기태 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.2

Scattering waves by a cylindrical alluvial embedded in a layered half-space is investigated by using the combination of the boundary integral representation and the finite element method. the surface displacement due to incident plane harmonic body waves propagating at an arbitrary angle to the axis of the cylindrical valley are evaluated numerically for two semi-elliptical valleys. The presence of the layer is found to have a strong effect on the amplification of the surface displacements in some cases. Effects of the existence of a compliant bedrock and the subsurface inhomogeneous on the site amplification and the seismic response of rigid strip footings are analyzed using boundary elements in a plane strain model for zoned viscoelastic media. Semielliptical soil deposits having several aspect ratio and boudless horizontal layers are assumed in the context of a parametric study. Several different values for the bedrock compliance and the foundation embedment are considered. The kinematic interaction of embedded foundations is shown to be very sensitive to the width fo the alluvial deposit. It is also shown that, as a genaral rule, the site amplification and the seismic response of foundations decrease with bedrock flexibility. Results for the diffraction of waves by an elastic cylinder included in a complete space are also presented.

특허정보(特許情報)에서의 우선권(優先權)

성기태,Seong, Gi-Tae 한국과학기술정보연구원 과학기술정보센터 1979 Journal of Information Science Theory and Practice Vol.12 No.3

고강도 콘크리트 부재의 전단거동 연구

성기태 忠州大學校 1999 한국교통대학교 논문집 Vol.34 No.2

The purpose of this study is to evalute the validity the known design propisons of shear strength for high-strength concrete members experimentally thought the experimental inestigation, the following conclusions are drawn; 1.For the members wiehout trausverse reinforcement, but for the members with transberse reinforcement, the safety factors caloulated by the present code provisions and modified compression field theory, are decresed if the comoressive strength of concrete is increased. According to this result, the design provision of present code is found to be unconservative for the high-strength concreate members 2.For the members without transverse reinforceemnt, the diagonal cracks are propagated very rapifly, but that with transverse reinforcement they are controlled by transverse reinforcement, so we can conclude that the size effect and unstable crack propagation can be ignored for the high-strength concrete members with thansverse reinforcement. 3.The inclination of shear crack is investigated by modified compression field theory and non-linear Finite Element Method Most of them show good agreement with observed data. Yet the modified compression field thoery tends to underestimate crack inclinations, because it underestimates the effect of aggregate interlock and strut-and-tie action due to the small shear span of this test specimens.

콘크리트 교량의 건전도 및 손상평가에 관한 기초적 연구

成基泰,金容道 충주대학교 산업대학원 1999 大學院論文輯 Vol.1 No.-

Most of existing reinforced concrete bridges was built with cement concrete. Almost every structures have more or less damaged because of various reasons such as material used, construction methods, conditions when constructed, structure and external load condition, water guality, and management methods. The damaged structres have posed huge problem in effectively managing and maintaining the system and damaged to repair and reinforce before use in season. Criterion for repairing and reingforcing material, selection methods,and evaluation methods for repaired and reinforced structures do not exit. In addition,existing and materials for repair and reinforcement are too difficult or expensive to apply to bridges structures. In this paper, Data are collected and analyzed to existing reinforced bridges,sprcific topics that were studied are as follow; 1. Evaluation of damaged bridges. 2. Examination of damaged structures. 3. Suggestions.