2002 Fiscal Year Final Research Report Summary
Study on Relative Motions and Interactions between Separate Structures subjected to Earthquake
| Project/Area Number |
12650564
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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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 |
KASAI KAZUHIKO Tokyo Institute of Technology, Materials & Structures Lab., Professor, 応用セラミックス研究所, 教授 (10293060)
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| Co-Investigator(Kenkyū-buntansha) |
OOKI Yoji Tokyo Institute of Technology, Materials & Structures Laboratory, Research Associate, 応用セラミックス研究所, 助手 (20323842)
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| Project Period (FY) |
2000 – 2002
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| Keywords | EARTHQUAKE / POUNDING / IMPACT FORCE / ADJACENT BUILDING / BRIDGE DECKS / SEPARATION DISTANCE / SLIDING SEAT LENGTH / STEPPING COLUMN SYSTEM |
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| Research Abstract |
In recent years, there has been increased awareness of the potential impact of buildings during moderate to strong earthquakes due to insufficient separation distance. Pounding can occur between the two buildings adjacent to each other, or between the segments of a building connected via an expansion joint or a bridge component. Another problem is falling of a bridge, which is supported by two separate structures developing relative motion. Accordingly, the objectives of the present research are; 1) to find necessary separation distance to preclude pounding or sliding seat length to prevent falling of a bridge structure, and 2) to quantify the effect of impact when a portion of the structure pounds at its boundary.
For objective 1), we proposed the use of the "spectral difference (SPD) rule" combined with elastic response spectrum, in order to approximate peak inelastic relative displacement of the two buildings. Buildings are either steel or R.C. structures. The method is validated and various trends discussed by using numerous code-compatible building pairs and 33 earthquakes. The method is also extended to a case where seismic wave against each structure has a certain amount of time lag.
For objective 2), we studied effect on performance of structures using stepping column system. In the system, the column base is allowed to uplift or stand on the ground alternatively. An analytical model for analyzing structure using stepping column system is established, in which the upper structure is modeled as a cantilever with lumped mass at top. The stepping column is modeled by a gap element that can develop an impact force. General form of cyclic force-deformation behavior of the structure is derived, and it is used to study dynamic effects of pounding of column base. The hysteresis behavior obtained directly from the model is confirmed in good agreement with numerical experiments.
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Research Products
(5 results)
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[Journal Article] JSSI Manual for Building Passive Control Technology. Part-7 Stepping Column System2004
Author(s)
Tran T.B., Kasai, K., Sato, T., Oohara, K., Shao, L.
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Journal Title
Proceedings of 13th World Conference on Earthquake Engineering, Vancouver, Canada
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Development of Passive Controlled Structure Using Re-use Element (Part 9) Investigation in SDOF Model.2004
Author(s)
Tran, T., Kasai, K., Sato, T., Kawaguchi, A., Terada, T., Minowa, C., Taga, K., Shao, L.
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Journal Title
Summaries of Technical Papers of Annual Meeting, AIJ B2
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Development of Passive Controlled Structure Using Re-use Element (Part 4) Effect of Dampers in Stepping Column System2003
Author(s)
Tran, T., Kasai, K., Sato, T., Kawaguchi, A., Terada, T., Minowa, C., Taga, K., Shao, L.
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Journal Title
Summaries of Technical Papers of Annual Meeting, AIJ B2
Pages: 697-698
Description
「研究成果報告書概要(欧文)」より
