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Angle between concrete compression strut and beam axis

Angle between concrete compression strut and beam axis perpendicular to the shear force can be calculated automatically or input by user in SEN depending on parameter Type calculation/input angle of compression strut. This parameter can be changed in Concrete setting (if 1D concrete member data is not defined) or in 1D concrete member data. There are the following options:

Auto - angle of compression strut is calculated automatically as minimal value between θ_min and θ_max to condition according to equation 6.29 in EN 1992-1-1

where

T_Ed	the design torsional moment
T_Rd,max	the design torsional resistance moment
V_Ed	the design resultant of shear forces
V_Rd,max	design value of the maximum shear force which can be sustained by the member, limited by crushing of the compression struts

User(angle) - angle of compression strut be input directly by the user as an angle. If the inputted value is outside of the interval θ_min and θ_max , the minimal or maximum value is taken into account for calculation
User(cotangent) - angle of compression strut be input directly by the user as cotangent of the angle. If the inputted value is outside of the interval θ_min and θ_max , the minimal or maximum value is taken into account for calculation.

Minimal and maximal angle of compression strut is parameter of national annex and can be edit in Manager of national annex

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