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32 R E L A S T ® D E S I G N M A N U A Lv Ed v Rd c 0 75 Nmm² 0 55 Nmm² *EN 1992-1-1 6 4 3 2b 137% Additional reinforcement is needed k max * v Rd c 1 40 * v Rd c *EN 1992-1-1 6 4 3 2b 1 40 * 0 55 Nmm 2 0 76 Nmm 2 v Ed k max * v Rd c 0 75 Nmm² 0 76 Nmm² *Z-15 1-345 3 2 2 4 98% Additional reinforcement is not possible Punching Shear verification n i 1 12 Number of screws in the 1st ring around the column *By Iteration s r 190 mm *By Iteration Asw i n * π 4 * d k 1 2 *Z-15 1-345 3 2 2 6 12 * π 4 * 14 8 mm 2 2064 mm 2 0 3d 78 3 mm 1 5d 391 5 mm Number of rings of screws between 0 3d 1 5d n i 2 Asw 1 5d n i * Asw i *Z-15 1-345 3 2 2 6 2 * 2064 mm 2 4129 mm 2 Asw 1 5d min Asw i Asw 1 5d 1 5 * d * s r *Z-15 1-345 3 2 2 6 min 2064 mm² 4129 mm² 1 5 * 261 mm * 190 mm 2004 mm 2 f ywd ef min 5 5 * k max γ s * d d k 1 0 5 * f ywd *Z-15 1-345 3 2 2 6 min 5 5 * 1 4 1 15 * 261 mm 14 8 mm 0 5 * 434 78 Nmm² 118 08 Nmm² v Rd cs 0 75 * v Rd c + 1 5 * d s r * Asw * f ywd ef * 1 u 1 * d *Z-15 1-345 3 2 2 5 0 75 * 0 55 Nmm² + 1 5 * 261 mm 190 mm * 2004 mm² * 118 08 Nmm² * 1 4379 mm * 261 mm 0 84 Nmm² v Ed v Rd cs 0 75 Nmm² 0 84 Nmm² *Z-15 1-345 3 2 2 4 89% 4 DESIGN EXAMPLES PUNCHING SHEAR REINFORCEMENT