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Torsion resistance verification
Explanation

Torsion is defined as the application of a twisting moment on the longitudinal axis of a prismatic piece. The following image shows the application of the strut and tie method to the torsion. This model will give us an idea of ​​the efforts/forces that appear in the concrete and what type of reinforcement will be needed. Explanation: Read more Calculation process
 Geometric characteristics Height (h) (mm): Width (b) (mm): Distance from the bottom face to the center of the reinforcement (R1) (mm):
 Concrete characteristics Concrete compressive characteristic strength (fck) (MPa): Concrete partial factor:
 Steel characteristics Steel yield limit (fyk) (MPa): Steel partial factor:
 Loads Torsional moment (kN.m): Normal force(kN) (Compression +): Fill in only for the calculation of the compression strut resistance and for the calculation of the shear-torsion interaction Vertical shear force (Following h)(kN): Fill in only for the interaction Torsion-Shear
 Longitudinal reinforcement (Only for the concrete shear resistance - Interaction torsion shear Lower reinforcement (A1) (mm^2): Fill in only to calculate the interaction with the shear force, to calculae the concrete shear resistance
 Capacity of the concrete struts calculation factors and the additional longitudinal required reinforcement Cracked concrete reduction factor (V1) (The EC-2 recommended value is automatically proposed): State of stress in the compression chord coefficient (α cw) (EC-2 calculated coefficient, it is conservative to consider it equal to 1): cot(θ) (1 ≤ cot(θ)≤ 2.5) :
Display torsion concrete resistance Results: Ratio of torsion concrete resistance Automatic calculation after introducing all the input data Additional longitudinal reinforcerment needed for the torsion Automatic calculation after introducing all the input data Ratio of the strut in compression Automatic calculation after introducing all the input data
Display torsion-shear interaction formulas Results of the interaction torsion-shear: Ratio of torsion concrete resistance Automatic calculation after introducing all the input data Ratio of the strut in compression considering the shear interaction Automatic calculation after introducing all the input data
Display torsion and shear reinforcement calculation formulas Shear reinforcement required: Torsion transversal reinforcement required Automatic calculation after introducing all the input data Shear transversal reinforcement required Automatic calculation after introducing all the input data