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Consider the figure above:
When we write the horizontal equilibrium in point A, we have :
When we write the vertical equilibrium in point A, we have :
In the limit state, the value Fep is limited by the capacity of the endplate :
| b | the width of the endplate |
| t | the thickness of the endplate |
| fy | the yield strength |
| γM0 | the partial safety factor for resistance of cross-section to overall yielding |
Out of the vertical and horizontal equilibrium, and the value for Fep in the limit state, we can calculate the maximum force Ffl,right and Ffl,left. These values will result in the design resistance of endplate in compression Fc,ep,Rd for both sides.
Minimum of the above resistance and resistance of "Beam flange and web in compression" component is then being used for the calculation of bending moment resistance Mj,Rd for such connection.