著者

大塚 文和 中本 壮祐 吉田 誠裕 川西 利昌 増田 光一

出版者

公益社団法人 土木学会

雑誌

土木学会論文集B3(海洋開発)

巻号頁・発行日

vol.73, no.2, pp.I_917-I_922, 2017

被引用文献数

1

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本研究は,東京湾における代表的な親水海浜であるふなばし三番瀬海浜公園の干潟域に最も大きく影響すると考えられる真間川河口前面海域の放射性物質の存在実態を,柱状採泥結果を基に3次元的に把握した.また,先の干潟域における放射線量の経年的な計測結果を通して放射線量の実態の概要を把握した.これらの結果を基に,東京湾における代表的な親水海浜であるふなばし三番瀬海浜公園の干潟域における放射線量の変動の可能性についても検討した.

著者

畔柳 昭雄 相田 康洋 増田 光一

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.87, no.796, pp.966-974, 2022-06-01 (Released:2022-06-01)

参考文献数

37

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Based on the results of the previous study on Itsukushima Shrine, we focused on the “corridor” and examined the floorboards of the corridor as a measure to mitigate the effects of waves and storm surges based on the sea conditions. The floorboards of the corridor are expected to reduce the energy of short-period transmitted waves toward the main hall. However, it is difficult to adopt the idea that the corridor was screened to reduce the wave energy.

著者

増田 光弘 南 清和 増田 光一 居駒 知樹

出版者

公益社団法人 日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 (ISSN:18803717)

巻号頁・発行日

vol.19, pp.61-68, 2014 (Released:2014-08-28)

参考文献数

13

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When the tsunami attacks in harbors, the vessels moored at a wharf may be unable to be evacuated. For example, it may happen the situations that the vessel is under cargo handling, the vessel has no crew or only foreign crew without knowledge of tsunami. In such a case, the following damages are assumed; breaking the mooring tether, grounding on a wharf, drifting to land areas and destroying buildings. This present paper describes the tsunami simulation and the motion analysis of vessel moored at a wharf using the MPS method (Moving Particle Semi-implicit method).In this research, the 3D-MPS method is applied. The chart of break of mooring tethers was created. The wave height of tsunami, draft of vessels and the relation of the break of the mooring tether were shown by the chart of break of mooring tethers. Then, the chart of break of mooring tethers is proposed for various scale of tsunami including the effect of incident angle of the mooring tether can be easily estimated against to the scale of tsunami and mooring system.

著者

増田 光弘 南 清和 増田 光一 居駒 知樹

出版者

公益社団法人 日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 (ISSN:18803717)

巻号頁・発行日

vol.25, pp.183-190, 2017 (Released:2017-09-06)

参考文献数

9

被引用文献数

1

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When tsunami attacks a harbor, the vessels moored at the wharf are exposed to a risk. For example, the following damages are assumed; breaking the mooring tether, grounding on a wharf, drifting to land areas and destroying buildings. In the previous report, the motion analysis of mooring vessels in tsunamis and the usefulness of tsunami protection measures by the install more mooring tethers (IMMT) was described using the MPS method. The incident wave angles of tsunami were used the 0 degrees (longitudinal wave) and 90 degrees (Transverse wave). For any incident angles, IMMT was effective. However, in the case of transverse wave of wave height 6.0m or more, it is possible to prevent the break of the mooring tethers, but it was confirmed that the vessels damaged by the grounding on a wharf. In the case of longitudinal wave, IMMT confirmed that it did not affect in some cases. It is influenced by the direction the mooring tether pulls. When the vessel moves, there are mooring tethers that are pulled or slacked. As a result, the mooring force does not act equally on the mooring tethers. Also, as an issue of existing papers, studies on oblique waves were not done. It is important to solve these issues.In this present paper, the influence of the oblique wave is studied. The extent of damage of longitudinal waves, transverse waves and oblique waves are compared through a numerical simulation method, the 3D MPS method. The 3D MPS method is used for numerical simulation. In this paper, quaternion is applied to the algorithm of rotational motion of the floating model. Furthermore, a more effective mooring method for longitudinal wave is proposed, and its effectiveness is demonstrated.

著者

増田 光一 有田 守 佐野 堅一 前田 久明 居駒 知樹 鈴木 圭太

出版者

Japan Society of Civil Engineers

雑誌

海岸工学論文集 (ISSN:09167897)

巻号頁・発行日

vol.45, pp.846-850, 1998

著者

惠藤 浩朗 佐藤 千昭 増田 光一 居駒 知樹 清水 研 畔柳 昭雄 山口 順子

出版者

社団法人 日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 (ISSN:18803717)

巻号頁・発行日

vol.19, pp.245-253, 2014 (Released:2014-08-28)

参考文献数

18

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An innumerable number of buildings in the coastal part of the east side of Japan were devastated by the Great East Japan Earthquake and Tsunami. Medical institutions also suffered the damage caused by tsunami, and the function to carry out the medical act has been spoiled. And the disabled concentrated on the medical institution which avoided tsunami damage. Under such circumstances, assistance from the water area began three days after the earthquake disaster, and much support supplies reached the stricken area. It was revealed that the support from the water area including the river was extremely effective against the stricken area.And then, the Tokyo Inland Earthquake disaster was assumed, floating medical support system installed in the quay of Arakawa River in Tokyo was proposed. Floating medical support system is movable; furthermore, it is built in the structural system of having very high isolation characteristics. Therefore, feasibility study such as selection of suitable setting position of this floating structure on Arakawa River, floor planning and flow planning at the time of always and a disaster, facilities and storage of various material,structural strength of the floating base, and the effects of disaster risk reduction was carried out about floating medical support system.

著者

坂井 英夫 小山 貴広 神戸 徹也 増田 光一郎 川崎 瑛生

出版者

社団法人日本化学会

雑誌

化学と教育 (ISSN:03862151)

巻号頁・発行日

vol.52, no.2, pp.89-90, 2004-02-20