FRP筋混凝土梁撓曲行為探討

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鄭曳辰(zheng ye) 查詢紙本館藏

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土木工程學系

論文名稱

FRP筋混凝土梁撓曲行為探討
(Analytical Study on Flexural Behavior of FRP Reinforced Concrete Beams)

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摘要(中)

本研究將使用分層(layer-by-layer)斷面彎曲曲率分析方法，模擬FRP筋混凝土梁彎曲與曲率之曲線，藉此了解FRP筋梁之撓曲行為。文中，亦以實驗與模擬結果進行比對。實驗試體共有十一根梁，和其他文獻試體進行模擬分析，藉此比較鋼筋梁與FRP筋梁受撓曲破壞下，其撓曲行為的不同。實驗結果發現，FRP筋滑移問題較普通鋼筋明顯，會影響預測FRP筋梁之彎矩與曲率的準確性。

摘要(英)

The target of the research is to study the flexural behavior of FRP reinforced concrete beams by means of sectional analysis and experimental verification. The sectional analysis is made via layer-by-layer method. The experimental work is provided to verify the availability of the traditional section analysis. Eleven reinforced concrete beams reinforced with FRP and steel bars are tested. The predict specimens included test beams by flexural failure in the study and other beams in references. The comparison between tested and predicted results on flexure behavior was made. The results show that the FRP bars slip effect is more obvious than steel bars, which may affect the accuracy of prediction.

關鍵字(中)

★ 握裹滑移
★ 撓曲
★ FRP筋
★ layer-by-layer斷面分析

關鍵字(英)

★ bond slip
★ flexure
★ FRP bars
★ layer-by-layer sectional analysis

論文目次

一、前言…………………………………………………………………1
二、文獻回顧……………………………………………………………2
2-1 FRP筋混凝土梁之撓曲行為預測……………………………2
2-2 FRP筋壓力貢獻………………………………………………5
2-2-1直接軸壓試驗…………………………………………5
2-2-2 使用於構件的抗壓貢獻………………………………6
2-3 ACI-440在FRP筋伸展長度規定 …………………………8
三、撓曲行為預測模型建立 …………………………………………10
3-1 分層斷面彎矩曲率模型 ……………………………………10
3-2 握裹滑移模型 ………………………………………………13
四、FRP筋梁實驗 ……………………………………………………15
4-1 試體製作 ……………………………………………………15
4-1-1材料性質測驗 …………………………………………15
4-1-1-1混凝土…………………………………………15
4-1-1-2 鋼筋直接拉力試驗 …………………………15
4-1-1-3 #7CFRP筋拉力試驗 …………………………16
4-1-2 試體梁詳圖說明………………………………………17
4-2 試驗設置………………………………………………………19
4-3 試驗結果………………………………………………………20
4-4 試驗結果與初期預測比較……………………………………22
4-4-1 RC梁行為 ………………………………………………22
4-4-2 FRP筋梁行為……………………………………………23
4-4-2-1 FRP筋混凝土梁壓力破壞試體 ………………23
4-4-2-2 FRP筋混凝土梁拉力破壞試體 ………………26
4-5 FRP筋壓筋貢獻 ……………………………………………28
五、量測與預測結果比較與討論 ……………………………………29
5-1 FRP筋梁設計理念……………………………………………29
5-2 試體主筋握裹滑移評估………………………………………31
5-3 FRP筋滑移模式探討 …………………………………………33
5-3-1實驗數據統計……………………………………………33
5-3-2滑移模式擬略……………………………………………34
5-3-3 其他實驗數據驗證 ……………………………………37
六、結論 ………………………………………………………………38
6-1結論 ……………………………………………………………38
6-2建議 ……………………………………………………………39參考文獻 ………………………………………………………………40

參考文獻

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Plastics (FRP) Bars,” West Virginia University, U.S.A., PhD thesis, 292 pp., 1990.
10. Kobayashi, K., and Fujisaki, T., “Compressive Behavior of FRP Reinforcement in Non-Prestressed Concrete Member”, Proceedings of the second International RILEM Symposium on Non-metallic (FRP) Reinforcement for Concrete Structure, pp. 267-274, Ghent, Belgium, 1995.
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14. Paramanantham, N., “ Investigation of the Behavior of Concrete Columns Reinforced with Fiber Plastic Rebar”, MS thesis, Lamar University, U.S.A., 183 pp., 1993.
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16. CNS 560 A2006，鋼筋混凝土用鋼筋規範，經濟部國家標準檢驗局，民國95年。
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18. Houssam A., Toutanji, and Mohamed Saafi, “Flexural Behavior of Concrete Beams Reinforced with Glass Fiber-Reinforced Polymer (GFRP) Bars”, ACI Structural Journal, Vol. 97, No.5, pp712-719 , 2000.
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指導教授

王勇智(Yung-Chih Wang)

審核日期

2010-7-15

推文