活性粉混凝土補強鋼筋混凝土梁構件之研究

The Study of Reinforced Concrete Beam Retrofitted by Reactive Powder Concrete

潘偉邦(Wei-Bang Pan)

指導教授 ： 李明君

朝陽科技大學/理工學院/營建工程系/碩士(2013年)

摘要

本研究最主要目的在於利用實驗探討活性粉混凝土應用於鋼筋混凝土構件維修補強性能測試之成效，若使用活性粉混凝土作為修補材料其維修補強性能之成效良好，將可大幅降低維修補強價格與提高老舊結構物之耐久性，藉由本研究提供結構物維修補強之參考。主要研究項目歸納如下：
(1)利用基本力學試驗來評估活性粉混凝土作為修補材料之可行性。
(2)製作小尺寸鋼筋混凝土梁並使用活性粉混凝土與碳纖維貼片進行補強探討補強成效與經濟之效益。
研究結果，活性粉混凝土與普通混凝土卜松比介於0.19至0.21間，適合水泥砂漿或混凝土修補，具良好之相容性，以活性粉混凝土與碳纖維貼片補強混凝土梁構件，活性粉混凝土補強後極限載重增加35 %，碳纖維補強後極限載重56.6%，但碳纖維補強位移量只增加4mm，而使用活性粉混凝土(1%鋼纖維)補強後位移量能提升15.7mm，使用活性粉混凝土(2%鋼纖維)補強後位移量提升26.8mm，而活性粉混凝土補強混凝土試體每m2補強單價比貼覆1層碳纖維貼片低2倍，故以活性粉混凝土較碳纖維貼片有較佳之韌性與位移量及耐久性，活性粉混凝土適合應用於混凝土結構之維修補強。

關鍵字

鋼筋混凝土梁構件 ； 補強 ； 活性粉混凝土

並列摘要

The main purpose of this study is to evaluate the performance testing of reinforced concrete beam retrofitted by using reactive powder concrete. It will significantly reduce cost to maintain aged building structures and provide longer durability if the test proves great effectiveness by using reactive powder concrete to repair. Furthermore, it provides a case study in reference for structure repair. The major topics are summarized as follows:

1.The feasibility of reactive powder concrete as repairing material assessed by using basic mechanical tests.
2.Investigating the repair and cost effectiveness of reinforced concrete beams retrofitted by reactive powder concrete and carbon fiber reinforced plastic (CFRP) material.
The result showed that reactive powder concrete and ordinary concrete have Poisson’s ratio between 0.19 and 0.21, they have great compatibility. Hence, reactive powder concrete might suitable for cement mortar or concrete repair.
The ultimate load increased 35% by reactive powder concrete and it increased 56.6% by CFRP retrofitted in small-size reinforced concrete beam test.
However, the amount of displacement increased only 4 mm by CFRP retrofitted as compared with the use 1% and 2% steel fiber of reactive powder concretes increased 15.7 mm and 26.8 mm, relatively. Furthermore, the repair price on each m2 of reactive powder concrete is twice as cost effective as one layer of CFRP. Therefore, reactive powder concrete has better durability, reinforced displacement and toughness as compared to CFRP and it is suitable for concrete structure repair.

並列關鍵字

Reinforced Concrete Beam ； Reactive Powder Concrete ； Retrofitted

參考文獻

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