• Title, Summary, Keyword: Anchorage

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Improvement Plans for Anchorage at Yeosu·Kwangyang Port (여수·광양항 정박지 개선방안에 관한 연구)

  • Lee, Hong-Hoon
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.23 no.1
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    • pp.17-25
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    • 2017
  • Relocation and expansion of existing port facilities are necessary given this increase in marine traffic volume and the presence of larger entering vessels. Therefore, this study focused on anchorage among water facilities, and examined the degree of harmony between anchorage and other water facilities at Yeosu Kwangyang Port. The number of anchoring vessels in relation to anchorage over the past 5 years, total anchored hours by anchorage-years, average number of simultaneously anchored vessels by anchorage-years, maximum number of simultaneously anchored vessels by anchorage, and maximum size of anchored vessels by anchorage have been surveyed. The minimum anchorage radius has been calculated according to the designated anchorage capacity according to anchorage. Finally, improvement plans for Yeosu Kwangyang Port's anchorage have been suggested, including relocating of Yeosu no. 2 anchorage, expanding of Kwangyang no. 1 ~ 5 anchorage, relocating of Kwangyang no. 8 ~ 9 anchorage, and repealing of Kwangyang no. 11 anchorage.

A Study on the Method of Representing Anchorage Using Occupancy Rate - Simulation Based on Ulsan E Anchorage - (정박지 점유율을 이용한 집단 정박지 면적 제시 방법 연구 - 울산항 E 정박지를 대상으로 시뮬레이션 -)

  • Park, Jun-Mo
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.22 no.2
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    • pp.167-173
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    • 2016
  • This study aims to present methodology for determining the appropriate anchorage area through the simulation reproduces the maritime transport environment, and analysis of the adequacy of anchorage applied at Ulsan E anchorage, suggests the formula of anchorage occupancy rater per hour and necessary anchorage area for this purpose. And configured simulation algorithm and modeling using MATLAB program, and applied Ulsan E anchorage, compared anchorage area with anchorage occupancy rate per hour. As a result, E1 necessary anchorage is 1.41 times, E2 necessary anchorage is 0.90 times and E3 necessary anchorage is 0.96 times compared to total anchorage area. If the result of adequacy analysis of anchor area reflect anchorage design criteria, it is determined to be helpful for the safety of the vessel using the anchorage.

A Basic Study on the Demand Analysis of Waiting Anchorage using Anchorage Capacity Index (정박지 용량지수를 활용한 대기정박지 수요 분석에 대한 기초 연구)

  • Kwon, Seung-Cheol;Yu, Yong-Ung;Park, Jun-Mo;Lee, Yun-Sok
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.25 no.5
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    • pp.519-526
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    • 2019
  • This study proposes a methodology for estimating the appropriate capacity of anchorage for ports requiring the establishment of waiting anchorage and then applying the methodology to the ports in Jinhae Bay to compare it with the anchorage capacity of major ports in Korea. To estimate the appropriate anchorage capacity, the "Anchorage Capacity Index" was used, which was calculated from the "Total Gross Tonnage" and "Simultaneous Anchoring Capacity". The calculations were made according to the anchorage capacity index of 0.89 of the target harbors. The adequate anchorage capacity index for the new waiting anchorage was analyzed at a level of 6.0. If the concept of anchorage capacity index suggested in this study is reflected as a new design criteria of waiting anchorage, it will be helpful for the safety of berth, safety of anchorage and effective operation of harbor.

Effect of Anchorage on Strength of Precast R/C Beam-Column Joints

  • Kim, Kwangyeon
    • Architectural research
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    • v.2 no.1
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    • pp.55-60
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    • 2000
  • Recently, there is a great demand for precast reinforced concrete (RC) construction methods on the purpose of simplicity in construction. Nishimatsu Construction Company has developed a construction method with precast reinforced concrete members in medium-rise building. In this construction method, how to joint precast members, especially the anchorage of the main bar of beam, is important problem. In this study, the structural performance of exterior joints with precast members was investigated. The parameters of the test specimens are anchorage type of the main bar of beam (U-shape anchorage or anchorage plate) and the ratio of the column axial force to the column strength. Specimens J-3 and J-4 used U-shape anchorage and the ratio of the column axial force of specimen J-4 was higher. On the other hand, specimens J-5 and J-6 used anchorage plate, and the anchorage lengths are 15d and 18d, respectively. Experimental results are summarized as follows; 1) For the joints with beam flexural failure mode, it was found that the maximum strength of specimen with anchorage plate is equal to or larger than that of specimen with conventional U-shaped anchorage if the anchorage length of more than 15d would be ensured, 2) Each specimen shows stable hysteretic curves and there were no notable effects on the hysteretic characteristics and the maximum strength caused by the anchorage method of beam main bar and the difference of column axial stress level.

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Effect of Anchorage Type of CFS on Flexural Behavior of RC Beams (탄소섬유쉬트의 정착 보강방법이 RC보의 휨거동에 미치는 영향)

  • Shin, Sung Woo;Bahn, Byong Youl;Lee, Kwang Soo;Cho, In Chol
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.2 no.2
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    • pp.202-208
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    • 1998
  • To investigae the effect of anchorage type of carbon fiber sheet (CFS) on flexural behavior of RC beams, the loading test of RC beams reinforced with CFS was conducted in variable of anchorage Type such as bolting anchorage and U type anchorage using CFS. This study can be summarized as follows ; It is confirmed experimentally that the bolting anchorage and U type anchorage with CFS is very effective to delay the bond failure and prevent the peeling of CFS. Also, the anchorage type applied with this study is very effective to improve the ductility compared with the improving of maximum flexural strength of RC beams. It is believed that the anchorage type used this study must secure the ductile capacity of above 3 for the flexural strengthening of RC beams. In the future, it is required to obtain the data about anchorage type of CFS for utilization of field work as well as investigate the ductile capacity of conventional study of anchorage type

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The Design and Construction of the Anchorage of Yi Sun-Sin Grand Bridge (이순신대교 앵커리지 설계-시공사례)

  • An, Ik-Kyun;Kim, Kyung-Taek;Seo, Young-Hwa
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.14-25
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    • 2010
  • The Yi Sun-Sin grand bridge is the suspension bridge which connects Myodo and Gwangyang. It is over the main navigation channel of Gwangyang Harbor. South anchorage(AN1, Myodo side) of the bridge is designed as rock anchored type. It sustains using the resistance of the underground rock's mass in Myodo. As this type of anchorage can minimize the exposure of the structure, It is economically efficient and environmentally friendly. North anchorage (AN2, Gwangyang side) is designed as the gravity type. This anchorage is 68 meters in diameter and use its own weight to support. Instead of normal rectangular diaphragm wall, the circular shape diaphragm wall is adopted to the north anchorage. It doesn't need to use internal temporary facilities, so it can significantly improve the constructability of the structure.

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A Improvement Plans for Anchorage at Masan Port (마산항 정박지 개선방안에 관한 연구)

  • Park, Jun-Mo;Kim, Seungyeon
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.24 no.6
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    • pp.637-645
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    • 2018
  • This study analyzes the problem of lack of anchorage caused by some anchorage closed and suggests ways to improve Masan anchorage. For this, we established the evaluation criteria, and analysed the anchorage operating rate during 5 years after estimating the capacity of barge, and suggested improvement plan after appropriateness assessment of anchorage capacity, finally verified the anchorage improvement plan. As a result of study, it is analyzed that the Masan A-2, A-4, A-6 anchorage needs to expand the anchorage due to excess the anchorage assessment criteria of 60 %. So, in order to improve the Masan anchorage, we suggested the improvement plan that extended 1.8 times by the group designated anchorage, according to integrating the A-2, A-4, A-6 anchorage and anchorage dwell time and ship type. And, the result of verification improvement plan, it is analyzed that meet the assessment criteria since decreasing the anchorage operating rate by 1/2 compared to the existing one, does not act as a risk factor in terms of maritime traffic.