Analysis of Brick-wall Structural Behavior under Compression in Its Plane

The paper presents the attempt of description an orthotropic material model, which takes into account the changes of the material parameters, depending on the load direction. The analyzes are carried out for masonry structures in numerical models consisting of uniformly material with the averaged properties. The use of material is only possible if the material model describes the sensitivity of material strength which depends on principal stress direction. This model sensitivity will be presented in stress-space by boundary surface changes. This paper shows the changes path of the boundary surface due to direction loads on the layered structures.