چكيده به لاتين
Abstract
Iran's susceptibility to occurrences of strong motion earthquakes requires the scientific community to pay special attention to the design and construction of earthquake resistant structures in order to save the humane and national assets of the country for the years to come. To prevent the massive destruction and losses caused by lateral loads due to strong ground shakings, special lateral load resisting systems must be designed and constructed. One of the most effective and up-to date systems of such, is the steel plate shear walls with coupling. For this purpose, the seismic behavior of several moment resisting frames in 3, 6, 9 and 12 stories employing this combinatorial lateral load resisting system has been investigated in this study. The software’s ABAQUS and SAP2000 have been used for this purpose. At first, the optimum mesh size for the numerical modeling of the system was obtained and the models were constructed accordingly. To examine the impact of the frame size in steel plate shear wall with coupling, different number of bays was used for the samples. Then, for verification of the analysis results, the hysteresis analysis was performed on the numerical model identical to the experimental model and the results indicated a good agreement between the two. At this stage, all the other numerical models were constructed and hereinafter the Push-over analysis was performed on all the frames. Therefore, the relative contribution of the frames and the web shear plates to the energy dissipation and initial stiffness was determined for each of the frames of the four sample models. Moreover, the structure behavior coefficient of all the frame samples was calculated. It was observed that more than fifty percent of the initial stiffness was due to the steel plates and their role in energy dissipation was significant for all the frame samples. It is recommended that this system to be used in seismic prone regions as a special lateral load resisting system because of its excellent ductile behavior and high energy absorbing capacity.
Keywords: Steel plate shear wall with coupling; Hysteresis analysis, Pushover analysis; Initial stiffness; Energy dissipation; Structure behavior coefficient
