چكيده به لاتين
numerous methods have been poposed for improring the behaviors of concrete structures up to the present time which have their own adrantage and disadvantages. One of the most recent methods is using steel shear walls wich is a state of the art method. Therefore in this dissertantion following the analysis and design the frames undergo nonlinear static push_over analysis using abaqus softwar complying with the regulation and the response factor will be measured. The impact of the thickness and slenderness of the steel sheets are investigated. The finite element results indicate increasing the thickness of the steel sheet promotes the system behavior in the elastic area, but it does not show adequate response in nonlinear region. At nonlinear area the ultimate resistence is increased 27% and by gradually adding the thickness os the sheet, the resistance increase rate is decreased and drop to approximately 10%. Therefore, with increase in plate thickness, although the ultimate strength of the system increase, but its increased rate in thinner thickness follows whit better increased rate. In addition in the sheet thickness of 12mm the energy absorbtion rate is 72% but in the sheet thickness of 20mm this rate is 59%. In energy absorbance, its not the case that sheet thickness increase will always cause the increase in the energy absorbance rate. Therefore optimized sheet thickness should be utilized. These results indicate that the steel sheet thickness increase will lead to the ultimate improvement and increase in the ultimate stiffness and resistance, but energy absorbance, flexibility and system response factor will be decreased. In the lower thickness the response factor is 8 and in higher thickness the response factor is 2.8.
Keywords: Steel shear wall، steel sheet، absorbing energy، Dilatability ،Behavior factor.
