著者

南波 宏介 白井 孝治 坂本 裕子

出版者

公益社団法人 土木学会

雑誌

構造工学論文集 A (ISSN:1881820X)

巻号頁・発行日

vol.63A, pp.1163-1176, 2017 (Released:2018-06-08)

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In the case of impact analysis to verify structural integrity of existing steel structures of nuclear power plants (NPPs) against tornado missiles, one of the strain-base criteria regarding aircraft impact on NPPs described by US Nuclear Energy Institute is currently used. However, the technical bases for this methodology are not disclosed. In this report, to clarify a way to decide the response values and the penetration conditions for a steel plate when a tornado missile crashes steel plate and verify an accuracy of design methodologies, impact tests with the pipe shaped missile of 50mm diameter and 4mm wall thickness were executed at impact velocity 49m/s.

著者

南波 宏介 吉田 篤

出版者

公益社団法人 土木学会

雑誌

構造工学論文集 A (ISSN:1881820X)

巻号頁・発行日

vol.67A, pp.849-863, 2021 (Released:2021-04-16)

参考文献数

26

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The development of a large cube container for low-level radioactive waste is necessary in order to ensure the efficient disposal of radioactive waste. Because waste disposal facilities are required to undergo a safety assessment in case of severe accidents, such a disposal container needs to be tested for impact resistant performance. In this study, a pre-simulation for a cube container previously designed, was carried out in order to decide the test conditions. The drop test conducted, used a full-scale container at its corner edge orientation. During the test, the lid bolts broke and the lid fell out. Taking into consideration these results, as well as the numerical analyses, the study proposes a container structure with improved impact resistant performance.

著者

岸 徳光 三上 浩 南波 宏介 BHATTI Abdul Qadir

出版者

土木学会

雑誌

応用力学論文集 (ISSN:13459139)

巻号頁・発行日

vol.8, pp.471-480, 2005-08

被引用文献数

2

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In order to establish a simple and rational impact response analysis method for lightweight shear-failure type Reinforced Concrete (RC) beams with stirrup, three-dimensional elasto-plastic finite element analysis was conducted for total fourty-seven RC beams under falling-weight impacting. Here, tensile strength of concrete was assumed as 1/16th of compressive one. An applicability of the proposed analysis method was confirmed by comparing with the experimental results of fourteen beams. From this study, following results were obtained: 1) impact response waves and crack patterns can be rationally predicted by using proposed analysis method, and 2) ultimate shear capacity of the RC beams under impact loading can be rationally predicted by means of the proposed numerical analysis method considering a safety margin of 15 %.