9. RESULTS

CHAPTER 9 "RESULTS" 33 2.5 Masonry failure criterion The new version of Scada Pro has now introduced the failure criterion Karantoni et al (1993) referring to masonry (in particular clay masonry). The stress-based check using a failure criterion is useful in cases where the provisions of EC6 and EC8-3 cannot be applied, such as: • on curved bodies • at out-of-level charging (in EC8-3) • when there is no floor baffle node WALL STRENGTH CRITERION Karantoni et al (1993) This criterion is based on the criterion proposed by Ottosen (1977) for concrete. To transform the criterion to apply to masonry, experimental data were used by calibrating certain parameters. Unfortunately, the experiments used referred to reinforced concrete structures, constituting a major reason for the accuracy of this simulation. The basic form of the criterion ( FORM 1 ) is as follows: = ∙ 2 + ∙ √ 2 + ∙ 1 − 1 (1) 2 where the parameters a, b, λ, I1 and J2 are calculated from the following data: • From the analysis --> Main trends σ1 and σ2