Reinforcing steel corrosion is one of the major cause of degradation in Reinforced Concrete (RC) construction. Corrosion is caused by the processes of carbonation and chloride attack, which results in a reduction in the structural performance of structures over time. The time-dependent corrosion process has an impact on structure safety and serviceability, and it can even lead to progressive failure. Corrosion causes reinforcing bar diameter reductions, concrete fissures, concrete cover expulsion, concrete and steel strength reductions, and the breakdown of the link between the concrete and imbedded steel. When it comes to multistory concrete buildings, corrosion is a considerably bigger issue in terms of seismic performance. As a result, accurately assessing and establishing the current corrosion degree of structural parts, as well as evaluating the local and global seismic capacity of existing corroded RC buildings, has been a major challenge around the world. The current study used a methodology in which revised properties were applied for seismic evaluation and establishing the correct restoration scheme for existing two-story RC framed buildings based on non-destructive and destructive material site as well as laboratory testing. The findings of linear seismic analysis and non-linear static pushover analysis for sound, corroded, and retrofitted buildings have been compared and analyzed and a new corrosion evaluation model is being proposed based on NDT (Non-Destructive Testing) and other established analytical models.
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