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18.104.22.168 Design of rebar spacing
Design of rebar spacing
In the Longitudinal Reinforcement tab of window 1.4 Reinforcement, a rebar spacing of a = 100 mm has been specified for both reinforcement directions by using the [Rebars] button.
The maximum rebar spacing max sl,-z,φ1 is determined by interpolation according to EN 1992-1-1, Table 7.3N for the existing tension stress σs,-z,φ1 = 208.18 N/mm2 and the crack width wk = 0.3 mm.
Analogously, the maximum bar spacing for the direction φ2 is determined from the existing tension stress σs,-z,φ2 = 167.09 N/mm2 as max sl,-z,φ2 = 291.1 mm.
The existing rebar spacing sl,exist,-z,φ1 = 100 mm available for the reinforcement direction φ1 is smaller than the maximum allowable rebar spacing max sl,max,-z,φ1 = 240 mm.
Therefore, the following check criterion applies for the reinforcement direction φ1: