1989 Fiscal Year Final Research Report Summary
HYBRID EXPERIMENT ON NONLINEAR EARTHQUAKE-INDUCED SOIL-STRUCTURE INTERACTION
| Project/Area Number |
62850085
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
土木構造
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
TOKI Kenzo Disaster Prevention Research Institute, Kyoto Univ., Prof., 防災研究所, 教授 (10027229)
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| Co-Investigator(Kenkyū-buntansha) |
KIYONO Junji Disas. Prev. Res. Inst., Research Assoc., 防災研究所, 助手 (00161597)
SATO Tadanobu Disas. Prev. Res. Inst., Assoc. Prof., 防災研究所, 助教授 (00027294)
IEMURA Hirokazu Faculty of Engineering, Assoc. Prof., 工学部, 助教授 (10026362)
KAMEDA Hiroyuki Disas. Prev. Res. Inst., Kyoto Univ., Prof., 防災研究所, 教授 (80025949)
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| Project Period (FY) |
1987 – 1989
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| Keywords | Hybrid Experiment / Soil-Structure System / Nonlinear Restoring Force / Foundation / Pile / Dynamic Interaction / Aseismic Design / Ultimate Intensity |
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| Research Abstract |
A hybrid study has been made of nonlinear seismic soil-structure interaction by numerical analysis of the governing differential by on-line computer. During this analysis the nonlinearity of stiffness of the system was measured experimentally by Pseudo-dynamic Test, and fed back to the computer at each successive step. The other dynamic characteristics of the system were treated analytically.
We have used seven large foundation-structure models, which are shallow foundation, embedded foundation, caison foundation, 1-pile, 2-pile, 3-pile and 9- pile models. Also different seismic input excitations were used with a variety of different maximum amplitude.
Static and dynamic mechanical characteristics of soil-structure model were determined by Static and forced vibration Dynamic Tests. Frequency dependent dynamic characteristics measured through these tests were taken into account formulating dynamic equations of motion. We developed a new time domain numerical integration scheme that is based on the Hilbert Transformation of frequency dependent dynamic characteristics of the soil-structure system. Finally, we identified hysteretic restoring force and parameters using Kalman filter technique.
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