15.2.5. Comprehensive Knowledge Level in Reinforced Concrete Buildings
15.2.5.1 - Building Geometry:If the building has reinforced concrete projects, the conformity of the existing geometry with the projects is checked with the measurements to be made. If the projects show significant differences with the measurements, the project is ignored. If there is no project, the building's load-bearing system relay will be obtained through field work. The information obtained must include the location, openings, heights, dimensions and materials of all reinforced concrete elements and partition walls on each floor. Short columns and similar negativities in the building will be recorded in the floor plan and sections. Its relationship with neighboring buildings (detached, adjacent, with / without joints) will be determined. Building geometry information should contain the details necessary to accurately describe the building mass. The foundation system will be determined with sufficient number of inspection pits to be opened inside or outside the building.
15.2.5.2 - Element Details: If the building's reinforced concrete detail projects are available, to check the compliance of the reinforcement with the project 15.2.4.2The procedures specified in will be applied in the same amount of reinforced concrete elements. In addition, the number and placement of the transverse and longitudinal reinforcement in 20% of the walls and columns and 10% of the frame beams will be determined by reinforcement detection devices. In case of inconsistency between the project and the implementation, the reinforcement realization coefficient, which expresses the ratio of the existing reinforcement in reinforced concrete elements to the reinforcement envisaged in the project, will be determined separately for walls, columns and beams. This coefficient used in determining the element capacities cannot be greater than 1. Possible reinforcement amounts will be determined by applying this coefficient to all other elements for which reinforcement has not been determined. If reinforced concrete projects or construction (application) drawings are not available, The reinforcement will be determined by stripping the concrete cover of 10% of the columns and curtains, at least two on each floor. The stripped surfaces will then be covered with high strength repair mortar. In addition, the number and placement of transverse and longitudinal reinforcement in 30% of columns and curtains whose concrete cover is not stripped and 15% of beams will be determined by reinforcement detection devices.
15.2.5.3 - Material Properties: From columns or curtains TS EN 12504-1In accordance with the conditions specified in., one concrete sample will be taken from each 400 m2, not less than three on the ground floor and not less than two on the other floors, and not less than nine in the building. 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. In the calculation of the capacities of the elements, the greater of the (mean minus standard deviation) value obtained from the samples and (0.85 times the average) value 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. The distribution of concrete strength in the building can be checked with concrete hammer readings or similar undamaged inspection tools adapted with concrete samples test results. Reinforcement class, This sample is not considered if it is lower than 75% of the mean of the remaining results. The distribution of concrete strength in the building can be checked with concrete hammer readings or similar undamaged inspection tools adapted with concrete samples test results. Reinforcement class, This sample is not considered if it is lower than 75% of the mean of the remaining results. The distribution of concrete strength in the building can be checked with concrete hammer readings or similar undamaged inspection tools adapted with concrete samples test results. Reinforcement class,As described in 15.2.5.2 , the stripped surfaces will be determined by the examination, one sample will be taken for each grade of steel (S220, S420, etc.), and the yield stress, rupture strength and deformation properties of the steel will be determined and the suitability for the project will be determined. If appropriate for the project, the characteristic yield stress of the steel used in the project will be taken as the current yield stress in the element capacity calculations. If it is not suitable, at least three more samples will be tested and the most unfavorable yield stress obtained will be taken as the current steel yield stress in the element capacity calculations. 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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