Issue 50

F. Jafari et alii, Frattura ed Integrità Strutturale, 50 (2019) 209-230; DOI: 10.3221/IGF-ESIS.50.18 215 M ODELS IN THE BUILDING WITH ABAQUS Part and material he considered building was of steel and had two stories. The peripheral panels comprised of two shotcrete concrete layers and an insulating middle layer, for which the physical properties are presented in Tab. 1. This study aimed to analyze the sandwich panel dynamic seismic behavior. For this purpose, the acceleration was entered into support conditions in X and Y direction and the results showed that all of the samples could completely withstand all the loading cycles. Fig. 5 presents the ground acceleration records applied into the structure and Fig. 5 presents the structure mesh and the columns coordinate. Figure 5: the structure mesh and location of the points. For all steel frames, concrete panel, insulting layers were modeled using element type of Solid Homogeneous (S4R), and wire was modeled using wire element (Beam type).The Young's modulus and Poisson’s ratio for steel, polystyrene, concrete and brick materials, with respect to its characteristic strength, were assumed according experimental research and these values was entered into ABAQUS (property panel). Concrete layers were used for the walls, which was connected to the insulting layers. Stress-strain curve was used to show material’s plastic behavior. The compressive strength of the concrete was 28-63 MPa and tensile strength is 2.8-4.7 MPa. Concrete damage plasticity was used to model plasticity behavior of concrete. In this section, stress-strain curve for compressive and tensile behavior of concrete was obtained according to Hsu et al [21]. Connections and boundary condition Concrete panels were used as out layers panels, which were connected to the polystyrene plate. In order to this aim, using Tie connection in constrain part, according to the previous researchers for composite material [17-18]. After joining these two panels, ABAQUS assume them as composite pieces which have both features (concrete and polystyrene). Using sandwich panel makes acceleration more uniform in both building side. For instance, the acceleration of brick panel in the right side is 1.47 more than the left side; however, by the use of sandwich panel this ratio is reaching to 0.7. Fig. 6a displays the dimension of main steel frame, the height of frame is 8.9, and the width is equal to 6.4. Fig. 6b shows the sandwich panel dimension, which was perched in the steel frame. Fig.6c shows steel mesh dimension, which was embalmed in the concrete part. Different parts of steel building were merged together in the right place. After that, insulting layers merge to steel frame and property panel was checked in order to allocate the steel to frame, and also polystyrene to insulting layers. Finally, the concrete panels were paste to the insulting layers by the use of Tie connection. As a result each element plays a special role with maintaining own characteristic in the frame. T