• 한국가시화정보학회지
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• 제13권2호
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• pp.28-32
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• 2015

Blood flow simulations in an realistic carotid bifurcation model with considering wall compliance were carried out to investigate the effect of wall elasticity on the wall shear stress and wall solid stress. Canonical waveforms of flow rates and pressure in carotid arteries were imposed for boundary conditions. Compared to a rigid wall model, we found an increased recirculation region at the carotid bulb and an overall reduction of wall shear stress in a compliant model. Additionally, there was appreciable change of flow rate and pressure wave in longitudinal direction. Both solid and wall shear stress concentration occur at the bifurcation apex.

• 한국지반환경공학회 논문집
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• 제14권9호
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• pp.39-47
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• 2013

Local deformations in back filling materials of two sands and one glass bead with different particle shapes behind a rigid retaining wall were studied. Two kinds of boundary conditions were compared: active wall translation and active rotation of the wall about its toe. Effect of the speed of active wall translation was also investigated. The digital image correlation method was used to analyze local deformation developments inside the materials. Test results showed that particle shape and density mainly influence the inclination angle and width of the shear band. The general shear band pattern is strongly dependent on the wall movement mode, while it was little influenced by particle shape. Within a limited range of wall speed in this study, shear band became wider and local deformation became larger with increase of wall speed.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 학회창립 10주년 기념 1999년도 가을 학술발표회 논문집
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• pp.411-414
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• 1999

Five reinforced concrete rigid frame and masonry infilled wall and cut off type masonry infilled wall were constructed and tesed during vertical and cycle loads simultaneously. Experimental programs were accomplished to evaluate the structural performance of test spcimens, such as the hysteretic behavior, the maximum horizontal strength, crack propagation, and ductility etc. Test variables are hoop reinforcement ratio and masonry infilled wall with on without. All the specimens were modelling in one-third scale size.

• 대한기계학회논문집
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• 제3권4호
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• pp.181-184
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• 1979

Three-dimensional potential flow due to the translation of a sphere touching a rigid plane wall or a free wall is investigated by use of tangent sphere coordinates. Exact expressions for the velocity potential are derived in integral formes. Added mass and lift force on the sphere are also calculated.

• 한국전산구조공학회논문집
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• 제26권1호
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• pp.19-28
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• 2013

전단벽-골조 구조시스템의 구조적인 거동은 휨거동하는 전단벽과 전단거동하는 골조의 상호작용에 의하여 결정된다. 이러한 전단벽-골조 구조물의 거동특성을 효과적으로 고려하기 위하여 선행 연구에서는 2차원 T형 강체를 사용한 단순 해석모델을 제안하였다. 본 논문에서는 이를 바탕으로 편심코어를 가진 전단벽-골조 구조물에 대한 효율적인 해석모델을 제안한다. 2차원 등가모델을 3차원으로 확장하여 비틀림 거동을 고려할 수 있도록 하였고, 그 결과 제안하는 등가모델이 편심코어를 가지는 전단벽-골조 구조물에도 적용가능 하도록 하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 추계 학술논문 발표대회
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• pp.43-47
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• 2008

CWSII method was developed to overcome the problems of frequent occurrence in the application of existing downward construction methods, especially in the case of using slurry wall instead of SCW or CIP as a retaining wall. By the improvements in connecting steel beams with the wall, CWSII method is able to ensure the settlement of a steel beam and the diaphragm effect of a slab while reducing the degree of difficulty and the term of works and the cost of construction. As the desired results, CWS method can be applied as a practical downward construction method regardless of the type of retaining wall. In this paper, besides the concept and features of CWSII method, it can be seen that the method can provide reliable and economical performances by comparing with existing methods.

• 한국지반신소재학회논문집
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• 제11권4호
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• pp.27-35
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• 2012

국내에 적용되고 있는 블록식 보강토 옹벽의 전면벽체는 보강재의 고정 및 뒷채움재의 유실방지 역할을 하지만, 벽체에 작용하는 하중에 대한 역학적 기능은 부족하다. 보강토체를 구성하는 벽체에 휨 및 전단에 대한 저항 성능을 부여하기 위하여 개발된 강성벽 일체형 보강노반은 다양한 장점에도 불구하고, 기존 공법과 비교하여 경제성 및 시공성 측면에서 단점이 부각되어 현장에의 적용은 미루어져 왔다. 본 연구에서는 강성벽 일체형 보강노반의 국내 적용성 향상을 목적으로 강성벽의 성능은 확보하면서 경제성 및 시공성을 향상시키기 위한 보강재 연직 배치 간격 및 길이 변화가 보강토체 전체의 거동에 미치는 영향을 평가하였다. 이를 위하여 강성벽을 갖는 1/10 축소모형 보강토체 및 높이 3m의 실내 실대형 시험체를 조성하고, 모사 열차하중 하에서의 변형 특성을 평가하였다. 시험 결과 비록 짧은 보강재를 사용함에도 불구하고 강성벽 보강노반에서 벽체 수평 발생변위 및 침하는 허용한계 수준 이하이었으며, 보강재 연직 배치간격이 30cm에서 40cm로 증가하여도 사용성 측면에서의 성능 수준에는 큰 변화가 없는 것을 확인할 수 있었다.

• Steel and Composite Structures
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• 제10권6호
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• pp.489-500
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• 2010

The rigid connections of I-beams to Rectangular Hollow Sections (RHS) in steel structures usually behave as semi-rigid connection. This behavior is directly related to the column face deformation. The deformation in the wall of RHS column in the connection zone causes a relative rotation between beam end and column axis, which consequently reduces the rigidity of beam-column connection. In the present paper, the percentages of connection rigidity reduction for serviceability conditions are evaluated by using the finite element analysis. Such percentages for RHS columns without internal stiffeners are considerable, and can be calculated from presented graphs.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1999년도 봄 학술발표회 논문집
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• pp.295-302
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• 1999

This paper is the experimental and analytic of reinforced concrete hemisphere dome under vertical load. It is described that when the reinforced concrete hemispherical dome supported on cylindrical wall is loaded vertically, how the opening part of dome will behave mechanically The experimental and analytic model is a Hemispherical dome with opening and the meridian angle of opening is 76$^{\circ}$at the center of sphere under concentrated load around the opening, but this is reinforced by a ring is sufficient stiffness. The diagrams of crack development are represented to understand the behavior of the reinforced concrete hemispherical dome. The method of crack analysis will be applied the rigid element spring model. The rigid element spring model is a new discrete element analysis, each divided element is assumed by rigid elements without deformation which is interconnected with elasto-plastic spring system.

• 한국소음진동공학회논문집
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• 제27권1호
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• pp.94-99
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• 2017

Breaking the rigid connection between the two faces of the wall can significantly improve the sound transmission loss of the wall. This is usually achieved by resiliently mounting the gypsum board on one of the two faces of the wall using resilient channel. Resilient channel with less stiffness than that of air cavity could move the resonance frequency of the light-weight wall. So we can get higher sound transmission loss at low frequencies for light-weight wall using resilient channel. It's sound transmission loss is 17 dB higher than that of single stud wall, and 5 dB higher than that of double stud wall.