Development of Ductile Bridge Columns with Enhanced Flexural and Shear Incore Zone
Project/Area Number |
21360212
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
MATSUZAKI Hiroshi 東京工業大学, 大学院・理工学研究科, 助教 (10506504)
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Project Period (FY) |
2009 – 2011
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Project Status |
Completed (Fiscal Year 2011)
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Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2010: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2009: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
|
Keywords | 防災 / 構造工学・地震工学 / 耐震 / 減災 / 自然災害 |
Research Abstract |
Based on a series of shake table experiments for a full-size bridge column using E-Defense, it was found that crushed core concrete spilled out from steel cage under extreme excitations. Such a failure model was first identified based on a full-model column excitation. It is anticipated that this failure modes accelerate degradation of column failure. Since such a scale-effect has not been sufficiently studied in the past due to limitation of large experimental facilities, the scale effect on the failure mechanism at the plastic hinge was investigated in this study. Four 5/36 geometrical scale models which were design and constructed as close to the full-size model as possible were exposed to the same response displacement and varying axial load after they were scaled-down based on the similarity law. It was found that both 1) an evaluation of sectional areas of deformed bars which have difference diameters and shape of surface deformation and 2) the maximum aggregate size were important for identifying the scale effect. It was found that progress of damage was faster in the full-size model that the scaled models though the flexural capacity can be well predicted by the scaled-model. Since the level of excitation to the full-size column by E-Defense was not extreme enough to develop collapse, it was found based on the study that under extremely strong excitation, the scaled models have a large limitation for predicting the failure mechanism of full-size columns.
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Report
(4 results)
Research Products
(39 results)
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[Journal Article] Seismic Performance of a Bridge Column Based on E-Defense Shake-Table Excitations2011
Author(s)
Kawashima, K., Zafra, R., Sasaki, T., Kajiwara, K., M.Nakayama
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Journal Title
Proc.Performance Based Seismic Engineering Workshop, Bled, Slovenia
Volume: 4
Pages: 1-10
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[Journal Article] Seismic Performance of a Full-Size Polypropylene Fiber Reinforced Cement Composite Bridge Column Based on E-Defense Shake Table Experiments2011
Author(s)
Kawashima, K., Zafra, R., Sasaki, T., Kajiwara, K., M.Nakayama
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Journal Title
Proc.8th International Conference on Urban Earthquake Engineering, Tokyo, Japan
Volume: 8
Pages: 1117-1124
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[Journal Article] 現在の技術基準で設計したRC橋脚の耐震性に関する実大震動台実験及びその解析2010
Author(s)
川島一彦, 佐々木智大, 右近大道, 梶原浩一, 運上茂樹, 堺淳一, 幸左賢二, 高橋良和, 矢部正明, 松崎裕
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Journal Title
土木学会論文集A
Volume: Vol.66, No.1
Pages: 324-343
NAID
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[Presentation] Fill-scale Shake Table Experimental Program of Reinforced Concrete Bridge Columns using E-Defense, Proc2011
Author(s)
Kawashima, K., Sasaki, T., Zafra, R., Kajiwara, K., Ukon, H. and Nakayama, M
Organizer
3rd Asia Conference on Earthquake Engineering
Place of Presentation
Bangkok, Thailand
Year and Date
2011-12-01
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