• Title/Summary/Keyword: 어항

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방파제케슨에 사용하는 신형식 푸팅구조의 역학적 특성과 구조해석

  • 한국어항협회
    • 어항어장
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    • s.2
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    • pp.86-127
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    • 1988
  • 버트리스 푸팅 케슨(Buttress footing caisson) 및 상형 푸팅 케슨의 역학특성을 해명하고 구조설계법을 검토할 목적으로 재하실험을 실시했다. 재하실험에는 배근의 제약등을 고려해서 실구조물의 1/4정도의 대형모형공시체를 사용해서 푸팅부를 중심으로 해석하기위해 푸팅에 선분포하중을 재하했다. 유한요소법에 따른 선형구조해석을 실시하여 변위, 단면력과 한계상황설계법에서의 산정식에서 얻어진 단면내력과를 비교하여 동설계법의 케슨구조물에 대한 적용성에 관하여 고찰했다. 이 보고로써 얻어진 주요한 결론은 아래와 같다. (1) 재하실험에 의하면 버트리스 푸팅공시체의 파괴형식은 버트리스부의 철근에 연한 부착할열파괴였다. 또 상형푸팅공시체에서는 푸팅부의 내면전단파괴였다. 양구조물을 설계할 때는 종래의 면외력만의 검토뿐아니라 면내력도 적절히 평가할 필요가 있다. (2) 양공시체 함께 푸팅 케슨본체와의 접합부 및 푸팅과 상자옆쪽의 벽과의 접합부에 변형이 일어나 종래의 판구조설계에서 가정하고 있는 판주변의 고정조건이 만족되지 않았다. 따라서 케슨구조물의 구조해석에서 구조전체계를 취급할 필요가 있고 부재단위에서는 단면력을 과대 또는 과소로 산정할 우려가 있다. (3) 철근강복시정도까지는 구조전체계를 모델화한 유한요소법에 의한 선형구조해석결과와 실험결과가 잘 일치했다. (4) 한계상태설계법에서의 굽음내력, 전단내력 및 구열폭의 산정식은 실험결과와 비교해서 어느쪽이나 안전측의 치를 부여했다.

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A Study of Wave Control by New Type Floating Breakwater (신형식 부방파제의 파랑제어에 관한 연구)

  • 김도삼;이광호;최낙훈;윤희면
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.16 no.1
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    • pp.1-9
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    • 2004
  • In this study, several new types of floating breakwater are proposed according to the geometry of the vertical barrier and the existence of horizontal plate, and are compared to the steel floating breakwater adopted in Won-Jun fishing port and the performance of wave control is numerically investigated by using Green function method. From the numerical results, model attached the horizontal barrier under the vertical barrier is more efficient for reflection and transmission coefficient than the steel floating breakwater in Won-Jun fishing port. It is confirmed that the transmitted waves can be controlled efficiently by optimizing the length and distance of a vertical and horizontal barriers.

A Study on the Color-Scape about Fishing Village and Harbor in Gangwon East Coast (강원 동해안 어촌어항의 경관색채에 관한 분석 연구)

  • Cho, Won-Seok;Kim, Heung-Gee
    • Journal of the Korean Institute of Rural Architecture
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    • v.9 no.2
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    • pp.121-128
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    • 2007
  • This study aims to propose directions of color-scape about fishing village and harbor in East coast. In order to offer better landscape in harbor; Namae and Sachun, such as regional atmosphere and identification are to analyze with color planning. For the quality of color-scape, natural color, regional color of harbor may be possible to work out future harbor surrounding by evaluation scale and then hue, value, chroma can be estimated systematically. This survey suggests that color of harbor is to be environmental and regional color control. We analyze that the color-scape planning through the both whole harmony and organic combination is important elements of satisfaction to the people of experience with color environments. Consequently, some proposal of color guideline by analysis of color simulation will be useful to make out preliminary design criteria in improvement of color.

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A Study on the Investigation of Color about fishing village and harbor in Gangwon East coast (강원 동해안 어촌어항의 색채 현황에 관한 조사 연구)

  • Cho, won-seok;Kim, heung-gee;Kim, jung-hyun
    • Journal of the Korean Institute of Rural Architecture
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    • v.8 no.3
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    • pp.75-82
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    • 2006
  • Recently a lot of domestic harbor and fishing village should be established by redevelopment Thus this paper is to propose directions of color design about fishing village and harbor in East coast. Above all important color-scape in harbor, such as regional atmosphere and sea-scape are to analyze color planning. The major analysis is to take basic data about color planning for marine tourism. For the feasibility of these characteristics, hue, value, chroma can be checked and design of color-scape may be possible to work out future harbor surrounding by evaluation scale. This study suggests that harbor of contemporary is to be environmental and regional color control. To this end, it shows that the color of not uniformity but combination/harmony is one of the important of satisfaction of color environments. The result of this study, analysis of color-scape about status will be useful to plan with color data in fishing village and harbor.

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A Study of Status Analysis on the Color-Scape about National Harbor Gangneung-Anmock and Coastal Street (국가어항 강릉 안목항과 해안가로의 경관색채 현황분석 연구)

  • Cho, Won-Seok;Kim, Heung-Gee;Kim, Yong-Ki
    • Journal of the Korean Institute of Rural Architecture
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    • v.10 no.1
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    • pp.59-66
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    • 2008
  • This paper analyzed the color of harbor and fishing village for the better landscape. Accordingly the aim of this study is to find out the color-scape in harbor, such as regional color and present status are to analyze with elements of design. In beginning point of development, it is to take practicable data about color planning for marine tourism. Regarding the utility of these characteristics, hue, value, chroma can be checked and design of color-scape may be possible to work out future harbor environments. This study suggests that harbor of contemporary is to be environmental harmony and regional color control. The result of this research, it is carried out that the color-scape is checked by partnership of experts, official and regional person with "agreement of landscape" to provide reasonable criteria in color surroundings. An analysis of regional color-scape is expected to use for landscape improvement of fishing village and harbor.

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Fishberry: A Remote Fishbowl Management System (원격 어항 관리 시스템)

  • Shin, Je-Woo;Cha, Hae-Wun;Kim, Byeong-Gab;Kong, Ki-sok
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.19 no.6
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    • pp.95-102
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    • 2019
  • As the number of fish keepers increases, fishbowl-related convenience products are on the rise. Existing products are not welcomed by consumers because of their lack of functions or high price. In this paper, we deal with a system that remotely controls sensors and motors of fish bowl based on Raspberry Pi and Arduino. In Android applications, you can use the following functions. firstly, feeding. Second, water changing. Third, it measures, visualizes temperature and pH values including alert function. Through the several experiments, it was verified that the system can be quickly accessed from the outside, and when it is appropriate to change water. This system allows the user to keep the fish more comfortable and safe.

A Study on Decisions of Selection Factors in the Fishing Village New-deal 300 Project Using the Analytic Hierarchy Process (계층의사분석 기법을 적용한 어촌뉴딜 300사업의 선정 결정요인 연구)

  • Kim, Dong Min;Kim, Gunwoo
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.5
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    • pp.692-699
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    • 2022
  • The fishing village new-deal 300 project covers 300 fishing villages and ports for integrated development including reforming backward facilities and utilizing regionally indigenous resources for specialized programs. An analysis was conducted to decide selection factors in the fishing village new-deal 300 project through the expert interview based on AHP(Analytic Hierarchy Process). The results of high-class appraisal items showed that the weights were ranked in the order of the development conditions and basic plan, project effects, project plan, and project execution and management. The project effect obtained 15.57 point in the AHP analysis, whereas the guideline stipulated the point as 6 point for the project effect item, The derived weights for each appraisal item in this study will hereafter be referred in determining the assessment points for the fishing village and port development projects.

Improvement for Impact Assessment of Marine Physical on the Development of Ports and Fishing Harbors in the East Coast (동해안 항만 및 어항 개발사업에 따른 해양물리학적 영향평가 개선방안)

  • Kim, In-Cheol;Kim, Gui-Young;Jeon, Kyeong-Am;Eom, Ki-Hyuk;Yu, Jun;Lee, Dae-In;Kim, Young-Tae;Kim, Hee-Jung
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.19 no.2
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    • pp.111-118
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    • 2013
  • This paper suggested the improvement of marine environmental impact assessment in eastern coast as analyzing consultation on the coastal area utilization for development of ports and fishing harbors for 3years in the east coast. The results of survey are only 3cases, 12cases and 16cases each for ocean currents, wave and sounding data. However, for development of ports and fishing harbors in eastern coast, ocean characteristics in eastern coast different than in the West Sea, South Sea is considered to marine environmental impact assessment. For development of ports and fishing harbors in east coast where the influences of ocean currents, wind-driven current and waves are dominant, the effect of the current should be considered to improve the reproducibility of tidal current. The wave should also be considered as an assessment criteria to obtain the validity of project such as harbor tranquility, functionality of breakwaters and stability. In addition, sediment inflow in river and exact water depth data of the ocean should be applied to numerical modeling and set wave-induced current to external force of sediment transport to predict the problems such as the harbor siltation and the coastal erosion considering ocean characteristics in the east coast.

Assessment and Improvement of Documentation Status on the Statements for the Sea Area Utilization Consultation according to the Project of Ports and Fishery Harbors (항만·어항개발사업의 해역이용협의서 작성실태 평가 및 개선방안)

  • Tac, Dae-Ho;Oh, Hyun-Taik;Kim, Gui-Young;Lee, Dae-In
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.21 no.4
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    • pp.361-371
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    • 2015
  • This study analyzed the 91 cases of the statements for the Sea Area Utilization Consultation according to the developmental projects of ports and fishery harbors for 2012 2014 and the status of the record of document, and suggested the improvement way to go. The marine environmental timpact assessment items both marine chemistry such as water quality, sediment and marine biology such as benthic animal, plankton, and fisheries show highly rate of site survey. But, the utilization of those data through site survey is too low, and it is necessary to adopt the QA/QC for the reliability of survey data. The items of marine physics such as tide, tidal current analyzed based on references not a site survey. However, the simulation performed actively without calibration and verification compared to the result of site survey. When the projects of port and fishery harbor perform, it is necessary to monitor the physical parameter such as wave, tide and tidal current especially. Based on the scale and the type of project, we need introduce the system of scoping for prediagnosis the key assessment items and checklists.