• 대한건축학회논문집:계획계
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• 제34권8호
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• pp.3-11
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• 2018

This study suggested practical considerations in case of planning Small-Sized Household Units of the Vertical Extension of Aged Apartment along with selecting particular Age-Apartment Complex to plan Small-Sized Household Units. Four parts of consideration; (1) Architectural planning aspects, (2) Resident aspects, (3) Structural aspects, and (4) Facility aspects were thoroughly examined to apply in the remodeling construction period. Proposals for Small-Sized Household Units, in this study, covered two different combinations. One was the combination of six equal units, the other was the combination of eleven different types of household units which reflected resident aspects in plan organizations. Plan organization proposal could be chosen and applied to Vertical Extended units by Local Government, Remodeling Association, or Constructor based on their potential residents' aspect, such as family size, life style, age, amount to income and etc. to fulfill their satisfaction. Furthermore, this study had great significance of the adequately reflecting demand on Small-Sized Household Units in Vertical Extension of Aged Apartment.

• 한국산학기술학회논문지
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• 제16권10호
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• pp.6846-6851
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• 2015

본 연구에서는 성토체의 확장에 의해 성토체 하부지반으로 전달되는 연직응력 증분량을 계산할 수 있는 식을 탄성론에 근거하여 유도하였다. 연직응력 증분량 산정식의 유도과정에서는 평면기점의 개념을 적용하여 유도과정을 단순화하였다. 연직응력 증분량 산정식에 의한 계산결과를 수치해석결과와 비교해 보았을 때 성토체 하부지반으로의 깊이가 커질수록 산정식과 수치해석결과 사이의 차이가 감소하였다. 수평방향 거리에 따른 연직응력 증분량을 수치해석결과와 산정식에 의한 결과를 통해 비교해 볼 때 대체적으로 산정식에 의해 예측된 연직응력 증분량이 수치해석에 의한 증분량보다 약간 커서 보수적인 결과를 보임을 알 수 있었다.

• 대한치과기공학회지
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• 제6권1호
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• pp.5-10
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• 1984

This experimental study was performed to investigate the effect of the wax extension method of posterior palatal seal area, introduced by Vig, on the amount of the vertical occlusal change of processed dentures. Twenty samples of maxillary wax trial dentures were constructed. Among them, the posterior palatall seal of ten samples were extended with wax over the posterior wall of the cast while that of the other ten were not. Then all were processed with self-curing resin and the amount of the vertical occlusal change was compared. The obtained result was that this method was proved to be effective in reducing the amount of the vertical occlusal change occuring in denure proccsing.

• 한국지반공학회논문집
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• 제35권12호
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• pp.35-44
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• 2019

본 연구에서는 수직증축 공동주택 하부 신설 보강말뚝의 축강성(K_vr)을 기존말뚝의 열화를 고려한 이론적인 접근과 수치해석을 통하여 산정하였다. 3차원 유한요소 수치해석을 수행하는 과정에서, 이론적인 접근과 38본의 시험 말뚝계측 결과를 통하여 제안된 열화를 고려한 기존말뚝 축강성(K_ve)의 상한 값을 적용하였다. 이를 통해, 수직증축 리모델링으로 인하여 증가된 하중을 안정적으로 지지하기 위한 신설 보강말뚝의 최소 축강성을 산정하였다. 신설 보강말뚝의 축강성 제안은 선단지지 말뚝과 마찰말뚝에 대해 수행하였고, 다양한 세장비(L/D)에 따라 제안하였다. 해석기법은 기존말뚝의 설계 당시의 양호한 상태를 고려한 말뚝지지 전면기초 거동 해석과 열화가 고려된 기존말뚝의 축강성을 적용한 말뚝지지 전면기초 거동 해석을 수행하였다. 두 해석기법에 대한 검증을 수행한 결과 말뚝지지 전면기초 거동해석이 가능한 것으로 확인되었고, 이를 통하여 기존말뚝의 열화가 발생하였을 때 선단지지 신설 보강말뚝 축강성이 44 - 67% 증가되어야 수직증축 구조물의 안정성이 확보됨을 알 수 있었다.

• 한국지반공학회논문집
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• 제35권12호
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• pp.25-33
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• 2019

본 연구에서는 수직증축 구조물의 기존말뚝의 축강성(K_ve)을 이론적인 접근과 현장 계측 결과를 바탕으로 추정하였다. 이론적인 접근에는 Randolph와 Wroth(1978)가 제안한 축강성 공식을 적용하여, 지중에 설치된 강성 및 연성말뚝의 세장비(L/D)에 따른 축강성의 범위를 도출하였다. 여기에, 1995 - 1997년 사이에 설치된 38본 말뚝의 계측된 시공 당시 축강성을 이론적으로 도출한 축강성 범위에 중첩해서 고려하였다. 이를 통하여, 노후화와 열화에 의하여 감소한 기존말뚝의 축강성의 최대값을 세장비에 따라 제안하였고, 도출된 값을 통계적인 기법을 통하여 상위 95% 값을 제안하여 신설 보강말뚝 설계 시 필요한 최소 축강성(K_vr)을 산정하는 데에 활용할 수 있도록 하였다.

• 대한안전경영과학회지
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• 제17권1호
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• pp.111-117
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• 2015

When scanning PET/CT, dose not unwrinkle gastric folds can be difficult to diagnose gastric cancer. In this study, we use an blowing agent to evaluate the extension the stomach and usefulness of it. The study enrolled 30 patients who patient with uptake in stomach between January and February 2013. Stomach extension was described as the vertical length of the Water drink group was $61.7{\pm}9.7mm$, horizontal length was $102.5{\pm}17.6mm$ and the vertical length of the Blowing agent group was $74.1{\pm}10.7mm$, horizontal length was $101.5{\pm}14.8mm$ in transverse section. Stomach extension was described as the vertical length of the Water drink group was $109.3{\pm}18.8mm$, horizontal length was $62.7{\pm}18.4mm$ and the vertical length of the Blowing agent group was $123.1{\pm}23.1mm$, horizontal length was $87.6{\pm}14.9mm$ in coronal section. Water drink group SUV decreased 35% and Blowing agent group SUV decreased 56%. Blowing agent group extension was similar or superior than water drink group. Therefore, when using a blowing agent will be able to help clinical.

• 한국구조물진단유지관리공학회 논문집
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• 제22권3호
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• pp.60-68
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• 2018

주택법에 근거하여 철근콘크리트 공동주택의 리모델링 시 최대 3개층의 수직증축 및 기존 세대수의 15%까지 증축이 가능하게 되었다. 수직증축 리모델링 가능 여부는 안전진단 기준 및 매뉴얼을 바탕으로 기울기 및 침하, 내하력, 내구성 평가 부문에 대한 조사를 통하여 평가하고 판정하도록 되어 있다. 그러나 현행 증축형 리모델링 안전진단 기준 및 매뉴얼은 재건축 안전진단 기준과 비교하여 조사대상표본 수를 증대시키는 등 보수적인 것으로 평가되고 있으며, 특히 내구성 평가 부문에 검토 및 개선이 필요한 것으로 생각된다. 따라서 본 연구에서는 수도권 지역 공동주택의 증축형 리모델링 안전진단 조사 사례에 대한 내구성 조사 항목 중 콘크리트 탄산화를 대상으로 통계적인 수법에 의해 표본 수 합리화 방안을 제시하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.452-458
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• 2007

The vertical extension of a building in general remodeling process increases both gravity and seismic loads by simply adding masses to the building. In this study, a vertical extension structural module (VESM) is proposed for enhancing seismic performance of the existing buildings by utilizing the story-increased parts. The proposed VESM is composed of steel column, steel beam, and beam-end rotational damper. The steel columns are connected to the shear walls and transfer the wall rotation in out-of plane to the steel beam, and then the beam-end rotational damper dissipates the earthquake-induced energy. Numerical analysis result from a cantilever beam of which end-rotation is restricted by rotational damper indicates that the displacement, base shear, and base overturning moment of the existing structures showing cantilever behavior can be significantly reduced by using the proposed method. Also, it is observed that friction-type rotational damper is effective than viscous one.

• 한국소음진동공학회논문집
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• 제18권6호
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• pp.589-597
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• 2008

The vertical extension of a building in general remodeling process increases both gravity and seismic loads by simply adding masses to the building. In this study, a vertical extension structural module(VESM) is proposed for enhancing seismic performance of the existing buildings by utilizing the story-increased parts. The proposed VESM is composed of steel column, steel beam, and beam-end rotational damper. The steel columns are connected to the shear walls and transfer the wall rotation in out-of plane to the steel beam, and then the beam-end rotational damper dissipates the earthquake-induced energy. Numerical analysis result from a cantilever beam of which end-rotation is restricted by rotational damper indicates that the displacement, base shear, and base overturning moment of the existing structures showing cantilever behavior can be significantly reduced by using the proposed method. Also, it is observed that friction-type rotational damper is effective than viscous one.

• Advances in Computational Design
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• 제3권2호
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• pp.201-212
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• 2018

Decrease in availability of suitable subbase and base course materials for highway construction leads to a search for economic method of converting locally available troublesome soil to suitable one for highway construction. Present study insights on evaluation of benefits of stabilization of subgrade soils in term of extension in service life (TBR) and layer thickness reduction (LTR). Laboratory investigation consisting of Atterberg limit, Compaction, California Bearing Ratio, unconfined compressive strength and triaxial shear strength tests were carried out on two types of soil for varying percentages of stabilizers. Vertical compressive strains at the top of unstabilized and stabilized subgrade soils were found out by elastoplastic finite element analysis using commercial software ANSYS. The values of vertical compressive strains at the top of unstabilized and stabilized subgrade, were further used to estimate layer thickness reduction or extension in service life of the pavement due to stabilization. Finite element modeling of the flexible pavement layered structure provides modern technology and sophisticated characterization of materials that can be accommodated in the analysis and enhances the reliability for the prediction of pavement response for improved design methodology. If the pavement section is kept same for unstabilized and stabilized subgrade soils, pavement resting on lime, fly ash and fiber stabilized subgrade soil B will have service life 2.84, 1.84 and 1.67 times than that of unstabilized pavement respectively. The flexible pavement resting on stabilized subgrade is beneficial in reducing the construction material. Actual savings would depend on the option exercised by the designer for reducing the thickness of an individual layer.