If the level of knowledge obtained from the buildings for which performance analysis will be made is limited according to TBDY 15.2.4 , the knowledge level coefficient is taken as 0.75. Information level coefficients are used to calculate the capacity of reinforced concrete members in the performance analysis (linear or non-linear) of existing buildings.
15.2.4. Limited Knowledge Level in Reinforced Concrete Buildings
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15.2.4.3 - Material Properties: From columns or curtains on each floor TS EN 12504-1At least three concrete samples will be taken in accordance with the conditions specified in. The strength values obtained by testing the cores whose length and nominal diameter are equal to each other and 100 mm can be used to determine the current strength of concrete without applying any coefficient. In converting the test results obtained from cores with different length / diameter ratios, appropriate conversion coefficients should be taken as basis. If the total number of samples is three, the lowest compressive strength obtained from the samples will be taken as the current concrete strength without statistical evaluation. If the number of samples is more than three, the greater of the (mean minus standard deviation) value and (0.85 times average) value obtained from the samples will be taken as the current concrete strength. It will be checked whether the smallest value is a statistically deviating result by evaluating the difference between the smallest value and the average of the remaining results among the test results of a group of concrete samples. For this purpose, when evaluating the sample results in the group, if the lowest single value is lower than 75% of the average of the remaining results, this sample is not considered. Reinforcement classAs described in 15.2.4.2 , the stripped surfaces will be determined by visual inspection, the characteristic yield stress of the steel of this class will be taken as the current steel strength. In this examination, the elements with corrosion in the reinforcement will be marked in the plan and this will be taken into account in the element capacity calculations.
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