In order to carry out linear performance analysis in existing structures , the conditions specified in TBDY 15.5.3 and calculated by impact/capacity ratios (ECO) must be met. If any of the application conditions of linear performance analysis is not met, one of the nonlinear methods should be chosen.
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ICONS
BYS = Building Height Class
EKO = Impact / Capacity ratio
R a = Earthquake Load Reduction Coefficient
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The ECO value is the ratio of the internal force value consisting of vertical loads and earthquake loads ( loading conditions ) taken as R a = 1 to the cross-sectional capacity calculated by considering the Knowledge Level Coefficient and Available Material Strengths . Therefore, ECO values depend on the reinforcement placement of the sections, material strength and internal strength value. In order for the ECO value used in the control of the application limits of linear calculation methods to be calculated correctly, the reinforcement placement, material strength and information level coefficient of the existing structure must be selected correctly. An example of TBDY 15.5.3.1 Linear Calculation Method Application Limits Control report is shown in the sample report below.
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