15.3.1

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 .

ICONS

IO = Limited Damage
LF = Controlled Damage
CP = Pre-Collapse

Three damage conditions and damage limits are defined for Ductile Elements in the Assessment and Design Based on Shaping (ŞGDT) approach . These are Limited Damage (SH), Controlled Damage (KH), and Damage Before Failure (LA) and their limit values.

Limited Damage (SH) is the case of very small amount or no inelastic (plastic) behavior in the cross section. Plastic joints behave elastic at the Limited Damage (SH) level and plastic rotation does not occur. Controlled Damage (KH) has a limited amount of inelastic behavior so that its cross-section strength is safe. Plastic joints Controlled Damage limited amount of plastic rotation at the (KH) level and minor damage to the structure occurs. Before Immigration(GÖ) damage condition is the behavior in which plastic deformations in the cross section are at an advanced level and section security is ensured. After this limit value, the plastic joint loses its carriage, passes to the collapse area and cannot provide section security. The above classifications are not valid for brittle damaged components. Ductile behavior in reinforced concrete elements is obtained under bending action. If the element exceeds the shear strength, because of the shear deformations, the section goes to the collapse region without plastic deformation and loses its bearing.

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