1990 Fiscal Year Final Research Report Summary
Experimental Study on Structural and Human Responses to Long Period and Large Amplitude Horizontal Motion
| Project/Area Number |
61420036
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
建築環境・環境工学
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| Research Institution | Hosei University |
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Principal Investigator |
GOTO Takeshi Hosei University, Department of Architecture, Professor., 工学部, 教授 (80112978)
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| Co-Investigator(Kenkyū-buntansha) |
NOGUCHI Kenichi Taisei Corporation, Dep. of Technology development, Chief of asection., 技術部・法政大学研究員, 係長
FURUKAWA Nobuhisa Hosei University, Department of Architecture, Assistant, 工学部, 助手 (10120833)
TSUBOI Yoshitaka Hosei University, Department of Architecture, Associate Professor., 工学部, 助教授 (20105860)
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| Project Period (FY) |
1986 – 1989
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| Keywords | Long period / Large amplitude / Horizontal motion / Structural frame / First natural period / Structural response / Human response / Motionsickness |
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| Research Abstract |
A multi-axis motion base was established on the basis of Private University Research Facilities Subsidy of the ministry of Education in fiscal year 1985. This research is composed of two parts which were done by using the motion base.
In Part l experimental and theoretical studies on the structural frame models subjected to long period horizontal motion were carried out, and the results of the experiments and the analyses conducted among the models are discussed. The following are the types of the models.
1) A column with one end fixed and the other free formed from aluminum box section. 2) a 3-story frame supported by four columns consisting of aluminum angle section. 3) a 18-story rigid frame supported by six columns consisting of light gauge steel box section.
Theoretical results by mode-superposition method and linear acceleration method were comparted with experimental results. The experimental values of acceleration response ampltude in the neighborhood of the first natural frequency were smaller than those of calculations.
In part 2 experimental study was carried out in order to understand both the subjective and the objective responses to the tall building motion, while concentrating particularly on the concept of habitability from view point of the environmental engineering. The items considered in part 2 are as follows : Subjective responses ; 1) Perception threshold, 2) feelings of hindrance and uneasiness, 3) the difficulty of maintaining one's balance on one foot while standing, 4) work efficiency (i. e. the amount of spilt water during the process of pouring water into a bottle), and 5) onset of motion sickness. Objective responses ; 6) the swinging states of a pendant light, 7) the sloshing of bath-tub water, 8) movement of furniture and fixtures, and 9) the behavior of small articles on a desk.
One of condcusions is that clear motionsickness begins to occur at around 10 cm/sec sec in acceleration. And the other items above mentioned are discussed.
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