臺灣博碩士論文加值系統

本研究透過鋼筋拉力及壓力試驗，探討鋼筋腐蝕後受拉力及壓力之影響。鋼筋腐蝕方法採用外加電流電化學腐蝕方式，共澆置6組混凝土試體，包含三組不同重量損失率，分別為10%、20%、30%，再從混凝土試體中取出腐蝕鋼筋，進行鋼筋拉力及壓力試驗，未腐蝕之鋼筋未進行混凝土澆置，即直接採取鋼筋進行試驗。
本研究目前僅試驗一組混凝土試體(10%腐蝕率)，內含縱向鋼筋及橫向鋼筋各8支。鋼筋隨機挑選未腐蝕及10%腐蝕之縱向鋼筋進行測試，試驗結果顯示，在拉力測試中腐蝕後之鋼筋極限應力及降伏應力略小於未腐蝕鋼筋，但應變相差約10%左右；在壓力測試中未腐蝕鋼筋之應力普遍大於腐蝕鋼筋。由變形曲線方面比較，未支撐長度較長之鋼筋變形亦較大。

This research uses the steel tension and compression test to investigate the effects of corrosion bars. Through use the electrochemical method to achieve the bars corrosion behavior. There are 6 groups of RC specimens. It contain three different weight loss rete are 10%, 20% and 30% respectively. Remove corrosion bars from RC specimens and do the bars tension and compression test. Then directly test none corrosion bars.
Currently, there is only one group of RC specimens (10% of the corrosion ratio) take into test, containing 8 bars for each longitudinal and transverse bar. Randomly select the bar from none corrosion and 10% of the corrosion ratio of longitudinal bar to test. As the result, the ultimate stress and yield stress of the corrosion bars is slightly less than none corrosion bar in tensile test. But the strain difference between it is approximately 10%. And the stress of none corrosion bar is generally greater than the corrosion bar in compression test. Compare the terms of the deformation curve, the deformation of longer length of the unsupported steel are also larger.

摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VI
表目錄 VII
第一章 緒論 1
1.1研究緣起與動機 1
1.2研究目的 5
第二章 文獻回顧 6
2.1腐蝕機制與原理 6
2.2鋼筋腐蝕對保護層混凝土之影響 8
2.2.1鋼筋腐蝕對核心混混凝土之影響 8
2.2.2鋼筋腐蝕對保護層混凝土之影響 10
2.3鋼筋腐蝕對鋼筋材料性質之影響 13
2.3.1通電腐蝕方法與腐蝕量預測 14
2.3.2鋼筋腐蝕對鋼筋拉力性質之影響 15
2.3.3鋼筋腐蝕對鋼筋壓力性質之影響 17
2.4鋼筋腐蝕對鋼筋握裹性質之影響 18
第三章 實驗流程 19
3.1腐蝕試體製作規劃 19
3.2試體之設計 20
3.2.1試體材料 20
3.2.2試體設計 20
3.3試體製作程序 23
3.3.1試體製作及加工程序 23
3.4試體通電加速腐蝕 26
3.5腐蝕試體架設流程 27
3.5.1試體清理 27
3.5.2試體架設及儀器設置 28
3.6試體試驗 33
3.6.1拉力試驗 33
3.6.2 壓力試驗 33
第四章 試驗結果與分析 34
4.1通電腐蝕觀測 34
4.1.1 通電與重量損失 34
4.2腐蝕鋼筋觀測 36
4.2.1 腐蝕鋼筋量測定義與計算 36
4.2.2 腐蝕鋼筋量測結果 38
4.3混凝土腐蝕裂縫觀測 40
4.3.1 腐蝕試體裂縫展開圖 40
4.3.2 腐蝕試體裂縫寬度量測 40
4.3.3 腐蝕裂縫寬度計算公式推導 41
4.4拉力試驗分析 45
4.5壓力試驗分析 47
4.5.1 壓力應力應變曲線 47
4.5.2 壓力鋼筋變形圖 49
第五章 結論與建議 54
5.1試驗分析結論 54
5.2相關建議 55
參考文獻 56
附錄A 鋼筋腐蝕後照片 59
附錄B 鋼筋受壓照片 62

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