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Journal Articles

Design loads and structural member modelling to shock-resistant design of buildings

Ikawa, Nozomu*; Mukai, Yoichi*; Nishida, Akemi; Hamamoto, Takuji*; Kano, Toshiya*; Ota, Toshiro*; Nakamura, Naohiro*; Komuro, Masato*; Takeuchi, Masato*

Proceedings of 12th International Conference on Shock and Impact Loads on Structures (SI 2017) (USB Flash Drive), p.259 - 268, 2017/06

Accidental actions on building structures involve impact and explosion loads. The design loads due to impact are determined by experiment data, impact simulation and energetics approach. These loads are presented in the form of load-time (F-t) curves caused by collision and explosion. It is assumed that the structure is rigid and immovable and that impacting body absorbs all the energy (i.e., hard impact condition is supposed), because this assumption gives conservative results in general. Responses of individual structural members directly-subjected to an impulsive load are evaluated. These responses are classified into three types; impulsive response, dynamic response, and quasi-static response. The maximum responses are basically estimated by direct integration method with a single-degree-of-freedom (SDOF) model. The procedure of the SDOF modelling based on the classification of types of members and failure modes is proposed in AIJ guideline.

Journal Articles

Design examples

Nishida, Akemi; Ohashi, Yasuhiro*; Obi, Hirotoshi*; Takeuchi, Yoshitaka*; Kano, Toshiya*; Ryuzaki, Hibiki*; Ota, Toshiro*; Kishi, Tokumitsu*; Komuro, Masato*; Nakamura, Naohiro*

Kenchikubutsu No Taishogeki Sekkei No Kangaekata, p.161 - 202, 2015/01

Though design guidelines for earthquake and wind loads are specified for buildings, the guideline for impulsive load as explosion and impact is not specified yet in architectural field. This document corresponds to Chapter 8 of the book titled "Introduction to Shock-Resistant Design of Buildings" which made towards the impact design guideline. Some design examples are presented to illustrate the applicability of the tentative guideline for impulsive loads. Two buildings - a steel frame and a reinforced concrete frame building structures - located at the corner of a crossroads are selected. Dynamic responses and the corresponding damage states are illustrated for the cases of two buildings subjected to impact loads due to road vehicle crashes, internal and external explosions. The idea has been shown in this document are those that can be applied to nuclear facilities.

Journal Articles

Study of neutron capture reactions using the 4$$pi$$ Ge spectrometer

Harada, Hideo; Goko, Shinji*; Kimura, Atsushi; Ota, Masayuki*; Oshima, Masumi; Kitatani, Fumito; Toh, Yosuke; Furutaka, Kazuyoshi; Kin, Tadahiro; Koizumi, Mitsuo; et al.

Journal of the Korean Physical Society, 59(2), p.1547 - 1552, 2011/08

 Times Cited Count:8 Percentile:53.36(Physics, Multidisciplinary)

For the improvement of the accuracy on the neutron capture cross sections, a 4$$pi$$ Ge spectrometer was developed. The 4$$pi$$ Ge spectrometer is a unique tool due to its superior energy resolution for studying properties on neutron capture reactions, not only capture cross sections but also resonance identification, $$gamma$$-ray intensity distribution, and spin-parity assignment. For example, its performance on the resonance identification was demonstrated using a $$^{rm nat}$$Ag sample. On the measurement of a $$gamma$$-ray intensity distribution for each resonance, the results of $$^{238}$$U will be shown. Using the 4$$pi$$ Ge spectrometer, the measurements of neutron capture cross sections were started at the J-PARC/MLF/ANNRI. The preliminary results on the measurements of neutron capture cross sections will be discussed mainly based on measurements of neutron capture cross sections for $$^{241}$$Am, together with related techniques.

Journal Articles

The JT-60 tokamak machine

Ota, Mitsuru; Abe, Tetsuya; ; Ando, Toshiro; Arai, Takashi; *; Hiratsuka, Hajime; ; Hosogane, Nobuyuki; ; et al.

Fusion Engineering and Design, 5, p.27 - 46, 1987/00

 Times Cited Count:5 Percentile:51.41(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Design and fabrication of the JT-60 graphite wall

Yamamoto, Masahiro; Shimizu, Masatsugu; Arai, Takashi; Nakamura, Hiroo; Ando, Toshiro; Ogiwara, Norio; Takatsu, Hideyuki; *; Okubo, Minoru; ; et al.

Nihon Genshiryoku Gakkai-Shi, 29(7), p.634 - 641, 1987/00

 Times Cited Count:0 Percentile:0.02(Nuclear Science & Technology)

no abstracts in English

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