本研究透過全尺梁反覆載重試驗，探討橫向鋼筋腐蝕對於鋼筋混凝土梁耐震行為的影響。箍筋腐蝕方法採用外加電流電化學腐蝕方式，除未通電的對照組試體外，共試驗六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，一為全尺寸梁試體，另一為腐蝕觀察試體，其中全尺寸梁試體在強迫腐蝕試驗後進行反覆載重試驗，腐蝕觀察試體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，梁的極限強度、極限位移、消能、塑性轉角會隨著腐蝕程度的增加而下降。其中極限強度下降幅度並不顯著，而韌性則隨著腐蝕程度的增加，先微幅上升後呈現顯著下降；由於鋼筋腐蝕膨脹主要造成保護層混凝土之劣化，對核心混凝土較無影響，故腐蝕造成混凝土剪力強度之下降，並不像剪力筋之剪力強度下降來的明顯；同時考慮最小斷面積與重量損失率去估計剩餘剪力強度可得接近真實剪力強度的結果。

The seismic performance of reinforced concrete beams with corroded transverse reinforcement was examined using cyclic loading on full-scale specimens. Seven beams were constructed. One beam was used as control without corrosion. The other six beams were subjected to six different levels corrosion. The corrosion was induced by imposing a constant current on the transverse reinforcement in the potential plastic hinge region. Each corroded beam was accompanied by a specimen for corrosion observation. The specimen for corrosion observation was intended to simulate the corrosion condition of the beam. After the corrosion process, the beam was tested using cyclic loading to examine the seismic performance. The specimen for corrosion observation was demolished to investigate the corrosion condition of transverse reinforcement. Test results show that as the corrosion level increases, the failure mode changes from flexural-shear failure due to crushing of core concrete to flexural-shear failure due to fracture of transverse reinforcement. Corrosion of transverse reinforcement does not have a significant effect on the ultimate strength of the beams. However, it has a significant effect on the deformation capacity of the beams. The ultimate drift and plastic rotation capacities greatly decrease as the corrosion level increases. A shear strength model is proposed that considers the softening of cover concrete and reduction in the cross-sectional area of the transverse reinforcement due to corrosion. Comparison with the test results shows that the proposed model gives better prediction when both the minimum residual area and average corrosion weight loss of transverse reinforcement are considered in calculating the shear strength.

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