Crack Width Calculation Spreadsheet
Crack Width Calculation Spreadsheet Excel
. Where the bonded reinforcenlent is fixed at reasonably close centres within the tension zone (spacing ≤ 5( c + Φ/2), cf. Figure 7.2), the maximum crack spacing s r,max may be calculated as follows: s r,max = k 3 c + k 1 k 2 k 4 Φ / ρ p,eff(7.11)where: Φ is the bar diameter. Where a mixture of bar diameters is used in a section, an equivalent diameter, should be used.
C is ρ p,eff see the difference of the mean strains above k 1 is a coefficient which takes account of the bond properties of the bonded reinforcement:k 1 = 0,8 for high bond bars,k 1 = 1,6 for bars with an effectively plain surface (e.g. Prestressing tendons). K 2 is a coefficient which takes account of the distribution of strain:k 2 = 0,5 for bending,k 2 = 1,0 for pure tension.Intermediate values of k 2 should be used for cases of eccentric tension or for local areas: k 2 = ( ε 1 + ε 2)/(2 ε 1)(7.13)where ε 1 is the greater and ε 2 is the lesser tensile strain at the boundaries of the section considered, assessed on the basis of a cracked section. K 3 is a Nationally Determined Parameter, see k 4 is a Nationally Determined Parameter, see. Where the spacing of the bonded reinforcement exceeds 5( c + Φ/2) (cf. Figure 7.2), or where there is no bonded reinforcement within the tension zone, the maximum crack spacing s r,max may be calculated as follows: s r,max = 1,3( h - x)(7.14)where: h is the overall depth of the section (see ) x is the neutral axis depth of the section (see ).This application calculatesthe crack width w kfrom your inputs.Intermediate results will also be given.First, change the following option if necessary.