In the performance analysis of existing buildings, three damage cases and damage limits are defined at the section level for ductile elements. These are Limited Damage (IO), Controlled Damage (LF) and Pre-Collapse Damage (CP) states and their limit values. Performance evaluation of existing structures is made according to the damage areas of the sections. Damage zones of critical sections are defined as Limited Damage Zone, Significant Damage Zone , Advanced Damage Zone and Collapse Zone.
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In the picture below, the areas where plastic hinges are formed and the damage conditions are shown for an example structure. Here plastic hinges shown in green are in theLimited Damage Zone (IO) , plastic hinges in blue are in the Significant Damage Zone (BH) , plastic hinges in yellow are in the Advanced Damage Zone (IH) and plastic hinges in red are in the Failure Zone Calculated in ( GB) .
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In the picture below, the damage conditions resulting from the plastic hinge distributed plastic behavior model in which the curtains are defined are shown for an example structure. Here , the elements shown in pink mean that they green are calculated in the limited damage zone , the plastic hinge Limited Damage Zone (IO) and the elements shown in blue are in the Significant Damage Zone (BS) . The elements shown in yellow mean that they are calculated in the advanced damage zone, Advanced Damage Zone (IH) and the plastic hinge elements shown in red are calculated in the collapse zone Failure Zone (SW) .
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