Issue 50

F. Jafari et alii, Frattura ed Integrità Strutturale, 50 (2019) 209-230; DOI: 10.3221/IGF-ESIS.50.18 216 Figure 6 : Building and panel details (steel frame dimension, b) concrete and insulting layers, c) steel mesh, d) steel building with insulting layers, e) concrete and steel mesh, f) steel building with sandwich panels. The characteristic of steel was entered into ABAQUS and stress-strain curve was used to show steel plastic behavior. Concrete damage plasticity was used to model a concrete plate. Here, a stress - strain curve for compressive and tensile behavior of concrete was calculated [24–25]. This model was also able to define the failure behavior of the concrete in the software. Meshing part In this part, the structured meshing technique was employed for meshing all part. By this technique, ABAQUS /CAE choose square mesh regularly for solid part geometry. The advantage of this method is that this type of mesh creates small boundaries to the mesh seeding to make sure that the opposite sides of the rectangular parts have the equal numbers of seeds. In this study, the frame was cut to different rectangular parts; the approximately global size of meshing was chosen 0.23. Since smaller mesh sizes were also examined in this structure, the obtained results were not affected by mesh downscaling. Output part The measure of displacement was computed in different points of the building and compared for different samples. For investigating the effect of sandwich panel behavior on the steel building frames, different numbers of panels in each frame were applied (three panels on the right side and two on the left) and displacement and acceleration at various points of the frame were evaluated. 8 points were considered as follows, points 1-2 in concrete layers, points 3-4 in upper points of steel frame columns, points 5-6 in panels and points 7-8 in the support conditions. The coordinate of the points are presented in Tab. 2. In this step, step panel and set tools were employed to obtain output value (acceleration, stress, displacement and base shear).