Calculation of crack width and crack spacing

Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2007

The present paper discusses crack propagation and special attention is given to how the combined effect of reinforcement and fibre bridging influences the crack spacing and width in the serviceability limit state. Two analytical approaches, for calculating the crack spacing and crack width, are presented. The first model is a modification of the conventional crack spacing model presented in Eurocode 2 and is valid for the case when cracking is caused by an external load. The second model, which is based on a bond-slip relationship and a compatibility requirement, is valid for cracking caused by restraint stresses. Moreover, in the paper some examples are provided of how the models can be used.