Probabilistic Evaluation of Column Over-Design Factore for Fram Structures
| Project/Area Number |
10555199
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Building structures/materials
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
ONO Tetsuro Professor, Dept.of Architecture, Nagoya Institute of Technology, 工学部, 教授 (30024300)
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| Co-Investigator(Kenkyū-buntansha) |
IDOTA Hideki Associate professor, Dept.of Architccture, Nagoya Institute of Technology, 工学部, 助教授 (10203192)
ZHAO Yangang Associate professor, Dept.of Architecture, Nagoya Institute of Technology, 工学部, 助教授 (50283479)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 2000: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1999: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1998: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | frame structures / entire failure pattern / stochastic limit analysis / column over-design factor / target COF / reliability based design |
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| Research Abstract |
In the earthquake resistance design of frame structures, the mode in entire failure pattern, which allows the yielding of all the beams in flexure prior to possible yielding of columns, is generally considered to be a preferable mode. Structures are therefore generally weak-beam-strong-column designed with a column over-design factor. In reality however, the designed weak-beam-strong-column structures may not collapse according to the preferable failure mode because of the large uncertainties in the external loads and the member strengths. These uncertainties may change the column over-design factor (COF) and the structure may collapse according to some unpreferable failure modes such as the weak story mechanisms. The object of this study is probabilistic evaluation of the target values of column over-design factors for which the occurrence probability of unpreferable failure modes can be limited to within a specific tolerance. A stochastic limit analysis procedure using the Linear Programing method and the First Order Reliability Method is developed, and the likely failure modes of weak-beam-strong-column designed structures are investigated using this procedure. The target value of column over-design factor is discussed in probabilistic terms. It is found that a much higher value of column over-design factor is required in the case of uncertain loads and member strengths than is expected in deterministic cases.
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Report
(4 results)
Research Products
(10 results)
