• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2002.05a
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• pp.131-134
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• 2002

원래 오감은 말 그대로 각 감각이 개별적으로 존재하는 것이 아니라 다섯 개의 감각이 때로는 겹치고 보완하고 서로 상승하기도 하면서 우리의 감성구조를 보다 입체적으로 구성한다. 따라서 사람들은 뭔가를 판단할 때 오감을 총동원하게 된다. 그러나 일반적으로 디자인이나 제품개발을 하기 위해 사용하는 의미분별척도는 사물의 성질이나 모양을 묘사하는 이미지 형용사를 사용하기 때문에 이런 감성구조를 파악하기에는 많은 한계를 가질 수 밖에 없다. 본 연구에서는 형용사 이미지어에 의존하는 의미분별척도법(SD법)의 한계를 밝히고, 형태, 색채, 음감, 미감, 후각, 촉감과 같은 오감 정보의 관련기호분석을 바탕으로 보다 입체적으로 감성구조를 파악할 수 있는 감성척도를 개발하였다.

• Journal of the Korea Concrete Institute
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• v.19 no.2
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• pp.225-231
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• 2007

In the recent construction industry, FRP is highly interesting in strengthening members of structures because it has superior material properties. This paper is an experimental study on the structural behavior of reinforced concrete beam when in using various amount of CFRP and the ductility of beams using various type of CFRP. In the experiment, when it makes an experiment using various amount of CFRP, strengthening width is more efficient than strengthening layer. The failure of CFRP strengthened beams presented brittle modes with having flexural failures. Also, It represented that most of beams classify brittle failure in the side of energy ratio. Energy ratio of CFRP sheet comparing with CFRP plate exceeds overall 50% and it represents about 70% in case of beams without strengthening layer.

• Magazine of the Korea Concrete Institute
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• v.10 no.2
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• pp.119-126
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• 1998

본 연구는 철근비와 보강판비를 조정한 보강철근비를 변수로 탄소섬유쉬트 접착된 철근콘크리트 보에 대하여 그 변형특성과 강도특성 및 파괴모드를 실험적으로 고찰한 것이다. 철근비와 보강판비가 증가할수록 최대내력은 증가하는 경향을 보이지만 탄소섬유쉬트의 겹수가 증가할수록 철근비 증가의 경우와는 달리 에너지흡수능력이 저하된다. 철근비와 보강판비에 따른 파괴모드를 구분하고 시험결과와 비교, 고찰하였던 바 파괴모드와 연성의 측면에서 보강철근비 е의 한계값을 0.87 max으로 제안하였다．탄소섬유쉬트와 철근콘크리트 보의 합성작용이 철근항복이후까지 유지되어 비선형적인 거동을 보임으로써 구조적거동이 양호하게 나타나는 것으로 입증되었다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.7A
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• pp.503-510
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• 2003

In CDMA cellular system, because all users share the frequency resource the signals of other user becomes interference which influences the communication quality. The system capacity defined the number of connected users within a cell is determined by the amount of interference, therefore the exact estimation of interference is important to system performance evaluation. In this paper, we propose an approximated function which calculates other cell interference in terms of Riemann-Zeta function in CDMA cellular systems, and compare with simulation results in other to verify its usefulness. The upper and lower bounds of system capacity calculated with the proposed approximated function gives almost alike result with the simulation. The proposed interference bounds are useful to calculate system capacity and to evaluate some algorithm in a hierarchical cellular systems where various propagation environments are mixed.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.69-72
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• 2008

Bridge bearings are devices absorbing the displacements of the superstructure. Elastomeric bearings used generally as bridge bearings absorb the displacements of the superstructure using their rubber characteristics. Elastomeric bearings should make sure their shear fatigue performance not to impede the durability of bridge system. In this paper shear fatigue tests were performed and stiffness were measured through the shear fatigue tests. Tests results show the measured stiffness of elastomeric bearings have no specific tendency. This paper found that elastomeric bearings show bad shear performance or fail early if elastomeric bearings are manufactured with a doublefold elastomeric layer.

• Journal of the Society of Disaster Information
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• v.10 no.3
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• pp.388-395
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• 2014

In this paper, usability and use force on the structure and does not have a big impact on the development of existing materials developed using materials to their full impact/blast resistant Complex configuration on the panel that can be implemented. Each material of the characteristics so that they can exert in layers of layer formed panels in layers. Structure of the general structure is to keep strength and endurance, maintenance and minimize the damage can be utilized for knee brace to do basic research, for creating the panel.

• Magazine of the Korea Concrete Institute
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• v.10 no.5
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• pp.151-158
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• 1998

최근 들어 구조물을 보강하는 방법으로 강판 또는 섬유쉬트를 외부에 부착시키는 공법이 많이 사용되고 있다. 섬유쉬트 중에서 가장 널리 사용되는 것은 탄소섬유쉬트이지만, 성능면에서 뒤지지 않고 가격면에서는 오히려 유리한 아라미드섬유쉬트에 관한 연구는 전무한 실정이다. 본 연구에서는 아라미드섬유쉬트로 휨보강한 RC보의 파괴양상 및 강도성능, 변형성능을조사하고, 여섯 개의 보강변수에 대한 보강효과를 조사하였다. 인장철근비, 보강길이, 보강겹수, 앵커볼트 정착 유무가 각각 다른 16개의 실험체와 밑면 마감처리 및 부재손상 여부가 다른 2개의 실험체, 그리고 이들 보강 실험체의 비교 근거가 되는 비보강 실험체 2개를 실험하여 그 특성을 연구하였다. 실험결과, 보강성능과 파괴양상에 가장 큰 영향을 미치는 변수는 보강길이로 나타났다. 보강겹수도 어느 정도의 영향을 미치는 것으로 나타났으나 그외 다른 변수들의 영향은 미비한 것으로 판단된다.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2005.05a
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• pp.234-238
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• 2005

One approach to testing the suitability of a adhesive joint for a particular application is to build and test to destruction of a representative sample of the joint. The nondestructive test will not measure strength directly but will measure a parameter which can be correlated to the strength. It is therefore, essential that a suitable nondestructive test is chosen and its results are correctly interpreted. In this paper, typical ultrasonic signal analysis in adhesive joints are evaluated together with interface stress from the result of finite element analysis.

• Journal of the Korean Society for Advanced Composite Structures
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• v.2 no.3
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• pp.36-41
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• 2011

This study proposes a experimental method to evaluate bonding strength of FRPs used for retrofitting concrete structures. Specimens are designed so that debonding failure of FRPs can be induced from reinforced concrete beams retrofitted with two layers of carbon and glass FRPs. And three-point loading tests are performed to see if debonding failure with proper debonding strength is observed from the specimens. The test results show that the tested beams are failed due to debonding of FRPs, therefore, the proposed test method is capable of evaluating debonding strength of FRPs using relatively small normal strength concrete beams.

• Magazine of the Korea Concrete Institute
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• v.10 no.6
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• pp.345-352
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• 1998

Compressive strength of concrete compression members strengthend with carbon fiber laminate(CFL) were studied from the test results. Test parameters are spacing, thickness, width, ply and spliced length of carbon fiber laminates. Specimens strength with sheets failed with sudden tensile rupture of the laminate, which indicate very brittle failure mode. Test result shows that closer spacing and to increas thickness of CFL is more effective. But strengthening ratio with 1-ply CFL is more effective than that of specimen with 2-ply CFL. Compressive strength capacity of specimen splied 24cm shows almost similar strength to that of non-spliced specimen. The ultimate load carrying of specimen strengthened with CFL ranges 1.11~1.86 times of that of non-strengthened specimen.