Seismic Flexural Strength of Reinforced Concrete Columns Corroded by Saline Soil

To study the seismic flexural strength of reinforced concrete (RC) column in saline soil environment, 14 inverted T-shaped RC bridge pier columns were designed and fabricated. The electrochemical corrosion test and low-cycle repeated loading test were carried out on the specimens. The damage form of the studied specimens was observed, and effects of axial compression ratio and corrosion rate on the seismic flexural strength is studied. The theoretical model of seismic flexural strength is established. The results show that when the axial compression ratio is constant, the corrosion rate of the specimen is larger and the seismic flexural strength is smaller. When the corrosion rate is constant and the axial compression ratio is within a certain range, the seismic flexural strength of the specimen increases as the axial compression ratio increases. In addition, the accuracy of the theoretical model is verified by comparing with the test results. The study results provide a reference for seismic design of columns in saline soil environment.