10B. DIMENSIONING PART 2/4

CHAPTER 10B 'DIMENSIONING' 61 3.4 Parameters In the "Parameters" option The choice is made of the type of analysis from which the intensities are derived. • If the analysis is pushover, you select the performance level against which to perform the checks. The intensive quantities correspond to the inelastic step for which the displacement of the control node is equal to targeted movement of the S.E. (A-DL , B-SD , C-NC). • If the analysis is elastic, select the asterisks (****) (the selection of the performance level for the elastic analysis has already been done in the parameters of the analysis scenario). The check is done for all combinations of the analysis and the result is the worst depletion ratio. 3.5 Check Then, the "Check" option checks the nodes as a whole, but only for the current level. The planned checks are carried out: Diagonal tensile cracking Under the combination of: a) the average shear stress τj , b) the normal stress σc=νtopfc caused by the axial load of the overlying column, the tensile cracking strength is calculated: Where , the percentage of horizontal connectors parallel to the vertical plane of the stress tj, reduced to the surface of the vertical cross-section of the node. Failure from diagonal grief The compressive strength of the concrete, as reduced by any transverse tensile deformations, is calculated: Where n= 0.6(1-fc/250), the reduction factor of the uniaxial compressive strength due to transverse tensile deformations.