2.4.4 Shear Design

Shear Design

Shear design differs greatly in the individual standards. In the following, it is described for EN 1992-1-1.

The design of the shear force resistance is to be performed only in the ultimate limit state (ULS). The actions and resistances are considered with their design values. The general design requirement is:

$V_{Ed} \le V_{Rd }$

where

• V_Ed : design value of acting shear force (principal shear force determined by the program)
• V_Rd : design value of shear force resistance

Depending on the failure mechanism, the design value of the shear force resistance is determined by one of the following three values:

If the acting shear force V_Ed remains below the value of V_Rd,c, no calculated shear reinforcement is necessary and the check is verified.

If the acting shear force V_Ed is higher than the value of V_Rd,c, a shear reinforcement must be designed. The shear reinforcement must resist the entire shear force. The load-bearing capacity of the concrete compression strut must additionally be analyzed.

$$\begin{gathered} V_{Ed} \le V_{Rd,s } \\ {V}_{Ed} \le V_{Rd,\text{max} } \end{gathered}$$