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.
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.
Nishida, Akemi; Mukai, Yoichi*; Hamamoto, Takuji*; Kushibe, Atsumichi*; Komuro, Masato*; Ohashi, Yasuhiro*; Obi, Hirotoshi*; Tsubota, Haruji
Proceedings of 12th International Conference on Shock and Impact Loads on Structures (SI 2017) (USB Flash Drive), p.379 - 388, 2017/06
Some design examples are presented to evaluate the shock-resistant performance of target buildings to confirm the applicability of the design criteria of AIJ guideline. Dynamic analyses are performed using SDOF model of an individual member on which an impulsive load is acting. Furthermore, analyses are performed using finite element model for the same member, and the results are compared to the results of the corresponding SDOF model for validation. Frame building structure model which is supposed to be located at the corner of a crossroad is investigated as an example. Dynamic responses and the corresponding damage states are illustrated for this building subjected to shock loads due to road vehicle crashes. As a non-structure member case, examples of window glass destruction subjected to internal and external gas explosions are presented.
Yamamoto, Yoichi; Maekawa, Keisuke; Yokota, Hideharu; Mukai, Kazuyuki*; Ishii, Keiji*
Doboku Gakkai Heisei-22-Nendo Zenkoku Taikai Dai-65-Kai Nenji Gakujutsu Koenkai Koen Gaiyoshu (DVD-ROM), p.525 - 526, 2010/09
no abstracts in English
Sugihara, Yoichiro*; Mukai, Katsuyuki*; Nunomiya, Ichiro*
PNC TJ6357 97-001, 40 Pages, 1997/03
Nishida, Akemi; Mukai, Yoichi*; Hamamoto, Takuji*
no journal, ,
In the impact load guidelines published in Japan, all descriptions of impact loads and their effects remain in deterministic expression. However, even in the Eurocode, which quickly adopted impact loads as design loads in structural design, and the ISO Standard that is currently scheduled to be published, impact load and impact resistance design are discussed on the assumption of reliability design based on probability theory. Therefore, the introduction of probabilistic viewpoints in the future of the domestic guidelines is unavoidable. In this presentation, the concept of the occurrence probability of impact load due to collision and explosion and its introduction in the ISO Standard will be introduced.
Kano, Toshiya*; Mukai, Yoichi*; Nishida, Akemi; Hamamoto, Takuji*
no journal, ,
WG4 was newly established under SC3/TC98 (Bases for design of structures) in 2015 to formulate the international standard ISO10252 for accidental actions by artifacts. Accidental action refers to an impact load that acts on the structure accidentally as a result of a collision with an automobile, a train, an aircraft, and so on or a gas explosion that occurs indoors or outdoors. Collisions of flying objects caused by tornadoes or volcanoes are also included in accidental action. The guides established in recent year, for example, the Impact Assessment Guide on Tornado for NPP, which was established in June 2013, require impact assessment for nuclear facilities caused by flying objects. This international standard presents the basic concept for calculating impact loads in these impact assessments. This presentation will introduce examples of design load for some kinds of impact action.
Mukai, Yoichi*; Nishida, Akemi; Hamamoto, Takuji*; Takeuchi, Yoshitaka*; Kano, Toshiya*
no journal, ,
The Architectural Institute of Japan (AIJ) published a book titled "Introduction to shock-resistant design of buildings" on the theme of accidental actions in Jan. 2015. In addition, based on this book, a new chapter on impact loads was added to the revised version of "Recommendations for Loads on Buildings" in March 2015. In this presentation, the outline of the "Introduction to shock-resistant design of buildings" will be outlined. And the activities by AIJ on the shock-resistant design in a concrete and rational manner after the publication of this book will be introduced.