| Project/Area Number |
62045035
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| Research Category |
Grant-in-Aid for Overseas Scientific Survey.
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| Allocation Type | Single-year Grants |
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| Section | University-to-University Cooperative Research |
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| Research Institution | Nihon University |
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Principal Investigator |
IROBE Makoto Professor College of Science & Technology, Nihon University, 理工学部, 教授 (30058698)
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| Co-Investigator(Kenkyū-buntansha) |
HAROLD Hamad ハワイ大学, 土木工学科, 教授
SHIRAI Nobuaki Assistant Professor College of Science & Technology, Nihon University, 理工学部, 専任講師 (90060144)
ADACHI Hiromi Professor College of Science & Technology, Nihon University, 理工学部, 教授 (40059928)
ISHIMARU Shinji Professor College of Science & Technology, Nihon University, 理工学部, 教授 (50059573)
SATO Toshio Professor College of Science & Technology, Nihon University, 理工学部, 教授 (10058688)
HAMADA Harold Professor Department of Civil Engineering, University of Hawaii
ハロルド ハマダ ハワイ大学, 土木工学科, 教授
中西 三和 日本大学, 理工学部, 助手 (40147690)
柳沼 善明 日本大学, 理工学部, 専任講師
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| Project Period (FY) |
1987 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 1989: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1988: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1987: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | Reinforced Concrete Pier / Aseismic Design Code / Aseismic Performance / Pseudo-Dynamic Test / Reinforced Concrete Column / Constitutive Law of Concrete / Cyclic Loading |
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| Research Abstract |
This research group was composed of 7 professors in Nihon University and 1 professor in University of Hawaii. Their activities as shown in the following were continued from 1987 to 1990.
1. The state-of-the-art of several subject areas related to aseismic research performed at universities and research organizations in Japan and United States was inspected. This includes a comparison between seismic design codes of both countries, overviews of laboratry testing methods simulating the structural response to earthquake inputs and of the numerical modelling concerning the hysteretic behavior of RC structures, and a survey of the seismic isolation device and practice in US.
2. The static and pseudo-dynamic tests for two kinds of scale models of an existing tall pier on a highway in Japan were conducted with the aim of comparison between the ductilities of brigde piers on the basis of design codes for concrete bridge in the two countries.
3. The earthquake response spectra obtained from the typical earthquake motions in the both countries were compared to investgate the characteristics of the ground motions. The spectra were calculated for the single-degree-of-freedom system with the bilinear hysteresis considering responses of RC structures with passively controled devices.
4. The nonlinear behavior of RC member under random cyclic loading were analytically and experimentally investigated. In the analytical study an effective numerical method was presented using the endochronic theory for the material constitutive law, and methodologically the lamination of one dimensional finite element model. In the experimental study it was verified that the similitude law is valid even in the plastic range of material under a certain circumstances. Additionally the effect of loading rate in the dynamic model tests was discussed and considered with the comparison of the dynamic test result to the static one.
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