Design Principle and Calculation Method Degree of shear connection =n Eurocode 4 The resistance moment of the critical cross- section of the beam is calculated by means of rigid plastic,except that a reduced value of the compressive force in the concrete flange Nc Rigid Plastic should be used in place of the force Ncf. Theory full interaction due to 7=1,0 rigid shear connection The degree of partial interaction partial interaction characterizes the stiffness of 0,0<1<1,0 due to flexible the shear connection and the shear connection axial stiffness of the chords compared to the sum of the bending stiffness's of the single n=0,0 no interaction chords. Design Principle and Calculation Method Eurocode 4 Rigid Plastic Theory The degree of partial interaction characterizes the stiffness of the shear connection and the axial stiffness of the chords compared to the sum of the bending stiffness’s of the single chords. !"#$"" !" !ℎ!"# !"##$!%&"# = ! = !! !!" ! = 1,0 ! = 0,0 full interaction due to rigid shear connection no interaction partial interaction due to flexible shear connection 0,0 < ! < 1,0 The resistance moment of the critical cross￾section of the beam is calculated by means of rigid plastic, except that a reduced value of the compressive force in the concrete flange Nc should be used in place of the force Ncf