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Journal Articles

Outline of new AIJ guideline publication as "Introduction to shock-resistant design of buildings"

Mukai, Yoichi*; Nishida, Akemi; Hamamoto, Takuji*; Sakino, Yoshihiro*; Ikawa, Nozomu*; Takeuchi, Yoshitaka*; Chiba, Fumihiko*; Hori, Yoshiro*

Proceedings of 12th International Conference on Shock and Impact Loads on Structures (SI 2017) (USB Flash Drive), p.329 - 338, 2017/06

AIJ guideline against accidental actions is published as a book, "Introduction to shock-resistant design of buildings". This contains respect to objective and scope, design loads, member design, design criteria, non-structural element, progressive collapse and design examples. The objective of AIJ guideline is to minimize human and property damage in building structures against accidental actions based on the performance-based design. Target buildings for design are offices, apartments, hotels, hospitals, schools and public buildings. Structural systems of the buildings are limited to reinforced concrete and steel frame structures. In this paper, the overview of the AIJ guideline is introduced.

Journal Articles

A Round robin program of master curve evaluation using miniature C(T) specimens; First round robin test on uniform specimens of reactor pressure vessel materials

Yamamoto, Masato*; Kimura, Akihiko*; Onizawa, Kunio; Yoshimoto, Kentaro*; Ogawa, Takuya*; Chiba, Atsushi*; Hirano, Takashi*; Sugihara, Takuji*; Sugiyama, Masanari*; Miura, Naoki*; et al.

Proceedings of 2012 ASME Pressure Vessels and Piping Conference (PVP 2012) (DVD-ROM), 7 Pages, 2012/07

Master curve (MC) approach for the fracture toughness evaluation is expected to be a powerful tool to assess the structural integrity of reactor pressure vessels (RPVs). In order to get sufficient number of reliable data for the MC approach from broken halves of surveillance test specimens for RPVs, the use of miniature specimens is necessary. For this purpose, a round robin test program on the miniature compact tension specimens (Mini-CT) of 4 mm thick for the MC approach of a Japanese RPV steel has been launched with the participation of academia, industries and a research institute in Japan. The program aims to verify the reliability of experimental data from Mini-CT, and to pick out further investigation items to be solved. As the first step of this program, four institutes carried out MC testing and evaluation using common test procedure and specimens. Valid reference temperature T$$_{0}$$ was successfully obtained in each institute. However, the T$$_{0}$$ values showed large differences with maximum of 34$$^{circ}$$C. It was indicated on the reason of difference that there is a strong correlation between the T$$_{0}$$ values and loading rate, which was selected by each institute per test standard.

Journal Articles

$$^{14}$$C concentration in tree rings of beech trees living near CO$$_{2}$$ vents in the Hakkoda Cardera, Aomori, Japan

Horiuchi, Kazuho*; Chiba, Takuji*; Hoshino, Yasuharu*; Oyama, Motonari*; Tanaka, Takayuki; Amano, Hikaru*

JAEA-Conf 2010-001, p.71 - 74, 2010/03

https://jopss.jaea.go.jp/pdfdata/JAEA-Conf-2010-001.pdf

We investigated how volcanic CO$$_{2}$$ emission affects the $$^{14}$$C concentrations in tree rings of beech trees in the Hakkoda Caldera in Aomori, which is one of high emission regions of volcanic CO$$_{2}$$ in the world. There was a tendency that the obtained $$^{14}$$C concentrations were, surprisingly, quite near to the values of the concurrent atmospheric CO$$_{2}$$ and decreased from 1991 to 2001. The $$^{14}$$C concentrations in caldera are lower than those of the control samples taken from a beech living outside of the caldera. We revealed the possibility that we can solve the local dynamics of fossil CO$$_{2}$$ emission using $$^{14}$$C in tree rings. However, the maximum difference of $$^{14}$$C between inside and outside of the caldera was 14 permil. This result showed that the volcanic CO$$_{2}$$ mixed with atmospheric CO$$_{2}$$ by 4.4 ppm or less. As the trunk absorbing CO$$_{2}$$ exist in height that is several meters higher than the volcanic CO$$_{2}$$ vents, the low mixing may occur.

Journal Articles

The Present status of TIARA at JAEA-Takasaki

Saito, Yuichi; Yokota, Wataru; Nara, Takayuki; Agematsu, Takashi; Okumura, Susumu; Uno, Sadanori; Ishibori, Ikuo; Kurashima, Satoshi; Yoshida, Kenichi; Yuyama, Takahiro; et al.

Proceedings of the 8th International Workshop on Radiation Effects on Semiconductor Devices for Space Applications (RASEDA-8), p.95 - 98, 2008/12

Journal Articles

Measurement of the spin and magnetic moment of $$^{23}$$Al

Ozawa, Akira*; Matsuta, Kensaku*; Nagatomo, Takashi*; Mihara, Mototsugu*; Yamada, Kazunari*; Yamaguchi, Takayuki*; Otsubo, Takashi*; Momota, Sadao*; Izumikawa, Takuji*; Sumikama, Toshiyuki*; et al.

Physical Review C, 74(2), p.021301_1 - 021301_4, 2006/08

https://doi.org/10.1103/PhysRevC.74.021301
 Times Cited Count：43 Percentile：89.22(Physics, Nuclear)

no abstracts in English

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