本研究透過足尺梁反覆載重試驗，探討鋼筋腐蝕對於鋼筋混凝土梁耐震行為的影響。鋼筋腐蝕採用外加電流強迫腐蝕方式，除未通電的對照組試體外，共試驗四組不同通電時間的試體，每組包含兩個受相同通電時間的試體，其中一個在強迫腐蝕試驗後進行反覆載重試驗，另一個則於腐蝕試驗後敲除混凝土，以調查鋼筋腐蝕情況。本研究發現，同樣的腐蝕天數，箍筋與主筋平均損失重量約略相等，因箍筋直徑較小，所以其平均重量損失率較高，平均最大孔蝕深度也較大；梁的強度、極限位移、消能、韌性與塑性轉角隨著腐蝕程度的增加，先上升後下降；隨著腐蝕程度的增加，梁的破壞模式由撓曲破壞轉成剪力破壞；利用平均最大孔蝕深度來估計剪力強度與撓曲強度，可得令人滿意的結果。

This research investigated the seismic behavior of reinforced concrete beams with corroded steel reinforcement. Corrosion was induced using accelerated corrosion by imposing the reinforcement a constant current. Nine full-scale reinforced concrete beam specimens were constructed. One specimen was not subjected to accelerated corrosion and used as control specimen. The other eight specimens were divided into four sets. Each set had two specimens and was subjected accelerated corrosion for the same period of time. After the corrosion process, one of the specimens in each set was tested using cyclic loading, and the other one was demolished to examine the extent of corrosion. It was found that the weight loss was similar for transverse and longitudinal reinforcement. Since the diameter of the transverse reinforcement was smaller, the percentage weight loss and the maximum pit depth were larger. As the corrosion level increased, the flexural strength, ultimate drift, energy dissipation, ductility, and plastic rotation capacity of the beams first increased and then decreased. In addition, the failure mode switched from flexural failure to shear failure. It was also found that the flexural strength and shear strength can be satisfactorily predicted based on the maximum pit depth.

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