Abstract The analysis of the mechanical behaviour of a reinforced concrete tie subjected to a monotonic loading in the stabilized cracking stage is performed here by way of a theoretical general model that considers the effect of the so-called Goto cracks (secondary cracks). It is shown, in particular, that the average bond stress along the transmission length depends not only on the concrete strength as assumed by the fib Model Code for Concrete Structures 2010, but also on reinforcement ratio and bar diameter. In this regard, tabulated theoretical values of the average bond stress are proposed as a function of the aforementioned parameters. Moreover, the secondary cracks reduce the effect of tension stiffening on the relative mean strain. On the basis of the main results obtained with the general model, some improvements are suggested for the calculation methods proposed by fib Model Code 2010 and Eurocode 2 concerning the average value of the bond stress and taking into account the influence of the secondary cracks on the mean deformation. Chv Config Serial Number. An improved calculation method is therefore performed. Finally, the theoretical results of crack spacing and crack width obtained with the general and improved methods are compared with experimental data obtained from extensive research on RC ties.

EUROCODE 2 WORKED EXAMPLES. For writing a Eurocode, like EC-2. EXAMPLE 7.3 EVALUATION OF CRACK AMPLITUDE. Visual Acuity Chart Software Download. Coherent check of the crack width of bridge deck slabs under permanent loads. 2 Theoretical model. 2.1 Reinforced tie behaviour. The loading and unloading response of a reinforced tie is shown in figure 2. Strains, the crack width wper (see figure 3) can be calculated for the different unloading regimes (see figure 6).