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Design strength for concrete struts in cracked compression zones: the value of ν'

Eurocode 2 part 1-1: Design of concrete structures   6.5.2 (2)

The design strength for concrete struts should be reduced in cracked compression zones and, unless a more rigorous approach is used, may be calculated from Expression (6.56) (see Figure 6.24).

σRd,max = 0,6ν'fcd (6.56)


The recommended value of ν' for the calculation of the design strength for concrete struts is given by equation (6.57N).

ν' = 1 - fck/250 (6.57N)

National choice