1995 Fiscal Year Final Research Report Summary
Elasto-plastic behavior of tall buildings in vortex-induced oscillations
| Project/Area Number |
06452286
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Building structures/materials
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
WADA Akira Tokyo Institute of Technology Research Laboratory of Engineering Materials Professor, 工業材料研究所, 教授 (90158684)
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| Co-Investigator(Kenkyū-buntansha) |
YAMADA Takahiro Tokyo Institute of Technology Research Laboratory of Engineering Materials Resea, 工業材料研究所, 助手 (40240022)
TAMURA Tetsuro Tokyo Institute of Technology Interdisciplinary Graduate School of Science & Eng, 大学院・総合理工学研究科, 助教授 (90251660)
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| Project Period (FY) |
1994 – 1995
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| Keywords | tall building / dynamic analysis / unstable oscillations / vortex-induced oscillation / fluid-structure interaction / elasto-plastic response / simulation / unsteady aerodynamics |
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| Research Abstract |
Recently tall buildings are designed within elasticity for the wind of the 500 years return expectation. In case that the vortex-induced oscillation occurs under stronger wind, it is important to evaluate the structual elasto-plastic stability of a tall building. Structual characteristics should be investigated for wind resistance design. A change of the natural period of the buildings and hysteresis damping have much effect on the aerodynamic forces, so we take the dangerous vibrations of tall buildings into account. The behaviors of the rectangular cylinder in vortex-induced oscillations and unstable oscillations are recorded on VTR.The process of growing vibrating response and the difference between elastic response and elasto-plastic response are investigated. The validity of the simulations is confirmed through the comparison of wind tunnel tests. As a result we understand the elasto-plastic behavior of a tall building in vortex-induced oscillations.
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