• Journal of the Korean Geosynthetics Society
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• v.8 no.2
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• pp.21-29
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• 2009

The connection strength between wall facing and geosynthetics should be evaluated by experimental method in the design of reinforced earth wall. However, the evaluation result of connection strength using the typical design method, FHWA(1996) and NCMA(1997), is excessively because of a safety factors. Therefore, this study is conducted in connection strength test between wall facing and geosynthetics, then the test result is applied to the design case by NCMA, FHWA and Soong & Koener(1997). The results confirmed that the evaluation method by Soong & Koener, which is used ultimate connection strength by connection strength test in allowable connection strength, is satisfied with stable in design.

• Land and Housing Review
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• v.6 no.1
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• pp.21-29
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• 2015

Coupling beams posses proper strength, stiffness and ductility capacities to resist efficiently under seismic loads. The strength, stiffness and ductility capacities for special diagonally reinforced concrete coupling beam with a span-to-depth ratio 2.0 or less is higher than those of coupling beam with conventionally reinforced concrete coupling beam. However, diagonally reinforced detailing creates major construction problem. In this study, design alternatives for diagonally reinforced concrete coupling beams were experimentally investigated. The results show that angle reinforced coupling beam(specimen SA) exhibited a better stable behavior in comparison with non-diagonally coupling beams(specimens SB-series) and sustained corresponding drift ratio, peak-to-peak stiffness and cumulative dissipated energy in comparison to diagonally coupling beam(specimen CA).

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1334-1340
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• 2004

Existing of angle assembly and angle beam joint examination with steel pole and steel beam of assembly existing anglerather then excellent enumerate, joint of beanding moment examination and economical existing show, in the futher, angle beam rather then steel I beam with all change.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.04a
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• pp.229-232
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• 2008

Researches on the steel-concrete composite girder filled with plain concrete have been being actively performed on the grounds that this type of girder has constructional, structural and aesthetical benefits. As a part of studies on the characteristics of inner shear connections in the concrete-filled steel-concrete composite girder with plain concrete, the confinement effect on the stiffness of inner shear connections was examined in this study. In the case of concrete-filled steel-concrete composite girder, it can be expected that the stiffness of shear connections may be increased in comparison with the case not confined. Therefore, the experimental studies were performed with the confinement effect as a parameter, and the results are discussed in this paper.

• Journal of the Korean Geosynthetics Society
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• v.6 no.1
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• pp.27-32
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• 2007

This paper describes the applicability of geogrid with I-type coupling system, which permits vertical displacement on back fill ground of the reinforced retaining wall and also minimize the damage between block and geogrid. The improvement of coupling method allowed the reduction of approximately 700 mm in the existing geogrid, and as a result, the tensile strength at the coupling joint showed approximately 53% of the maximum tensile strength. It is expected from the laboratory investigations that the coupling strength of geogrid with the combination of in-situ supporting material should be predominant in the field condition.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2001.11a
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• pp.46-52
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• 2001

본 연구에서는 롤러로 지지된 슬래브 구조물인 연결통로 구조물에 대한 구조해석을 수행하여, 고정하중(사하중)과 활하중 작용시 대상구조물에 발생되는 최대 변위 및 최대 단면력을 해석하였으며, 극한강도설계법에 의하여 극한강도 및 설계강도를 비교·검토함으로써 대상 연결통로 구조물의 안전성을 평가하였다. 구조해석시 대상구조물을 3차원 뼈대 요소 및 shell 요소로 형상화하여 모델링하였으며, 현재 가장 널리 사용되고 있는 범용 구조해석 프로그램인 SAP 2000 Nonlinear에 의해 구조해석을 수행하였다.(중략)

• Journal of Korean Society of Steel Construction
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• v.13 no.6
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• pp.621-629
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• 2001

This study consists of static and fatigue tests to evaluate the behavior on the field splice joint of longitudinal rib in orthotropic steel deck specimens. Specifically, static and influence surface tests are performed for the stress distribution at the scallop area and high-strength bolt connection of longitudinal rib to examine the existence of handhole cover plate and the effect of eccentric loads. The ultimate strength of the field splice joint of longitudinal rib is obtained. In fatigue tests, cracks are observed at the scallop in the lower level test and the catastrophic failure of longitudinal rib is occurred following the failure of handhole cover plate in the higher level test. This study gives a basis for the better understanding of the field splice joint of longitudinal rib.

• Proceedings of the KIEE Conference
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• 2003.07d
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• pp.2516-2518
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• 2003

본 논문은 고차 뉴런의 문제점으로 지적되고 있는 뉴런이 방대하게 증가하는 문제를 해결하고자, 최적의 뉴런을 생성하고 생성되어진 고차 뉴런 중 일정 비율로 뉴런의 연결강도를 도태시켜 감에 따라 네트워크상에 나타나는 특성을 비교하였다. 본 논문은 고차 뉴런을 이용한 Kohonen의 자기 조직화 맵의 고차 뉴런부에 일정 비율로 연결강도를 도태한 후 인식률을 얻는 형태로 시뮬레이션을 하였다. 특히, 종래 형태의 고차 뉴런을 이용한 Kohonen 자기 조직화 맵의 알고리즘을 변형없이 사용하였으며 중복되는 뉴런을 최대한 억제하기 위해 2차 뉴런만을 생성한 네트워크 구조 위에 입력 데이터의 특징을 유지하고 고차 뉴런의 특징을 더욱 활성화하기 위해 일정한 양의 연결강도를 도태시킴으로써 출력면에서 국소집중 반응에 의한 정확한 인식률 향상 등을 조사하는 시뮬레이션을 하였다. 본 제안 모델의 특성을 살펴보기 위해 60개의 데이터로 이루어진 금속 소나 음데이터와 암석 소나 음 데이터를 이용하여 금속인지 암석인지를 판별하는 시뮬레이션을 하였다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.26 no.4
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• pp.309-318
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• 2013

Abutment-to-pile connection in an integral abutment bridge is vulnerable to lateral displacement induced by thermal movement of the superstructure. However, previous researches have merely focused on the connection. In order to improve the performance of the connection, new abutment-to-pile connection designs were proposed based on quasi-static nonlinear finite element model. The reinforcement detail specified in PennDOT DM4 and HSS tube were barely effective in controlling crack growing but spiral rebar effectively performed to delay crack growth as well as absorbing energy capacity. However, it was found that delaying cracking and strengthening the connection also caused the high lateral load in superstructures. Consequently, shape of HP pile were modified to introduce plastic hinge of the HP pile for reducing the lateral load in superstructures. Connections with modified HP pile significantly prevented crack propagations under the lateral displacement.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.110-113
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• 2010

해양플랜트 구조물은 대양에서 파력을 비롯한 바람 등과 같이 자연에 의해 발생하는 다양한 외력을 구조물 사용기간 동안 지속적으로 랜덤하게 받게 되므로 이로 인한 피로현상이 발생하게 된다. 특히 용접부로 이루어진 격점부는 복잡한 기하형상의 영향으로 피로에 대해 취약구조가 되므로 피로강도향상은 해양플랜트 구조의 안전성에 중요한 요인이 된다. 본 연구에서는 격점부에 대한 구조상세에 관련한 설계기준 및 평가방법을 조사하였으며, 고정식 Jacket 구조물을 대상으로 프레임요소를 사용하여 구조해석을 실시하여 공용하중에 대한 구조거동을 분석하였다. 또한 격점부의 강도평가방법 및 연결부 피로강도를 개선하기 위하여 프레임요소의 구조해석을 토대로 복잡한 기하형상을 가진 KT형 관이음부(Tubular Joints)에 대해 상세해석을 실시하였다.