Sort Combination of Friction and Viscoelastic Dampers Effect on Behavior of Steel Moment Frames

Background/Objectives: In powerful earthquakes, the structure design is often such that the building is allowed an entrance into an inelastic position and as a result outbreak of persistent deformation. Therefore using appropriate energy absorption systems in structures with mal-functioned members is of high importance. Methods/Statistical Analysis: In the present research, a five-storey steel moment frame structure with the help of five different configuration modes for viscoelastic and friction dampers as connected diagonally, parallel and serially was examined. To examine the behavior of the structure, seven Accelerograms scaled by SAP were used. The structure was included in a dynamic nonlinear analysis. Findings: It was revealed that the existence of dampers causes a decrease in major responses of the structure including story displacement, story drift, story acceleration, base shear, and reduction of plastic joints function. Also, the parallel mode reflected better responses than the serial modes. Conclusion/Application: In conclusion, in this research we find that the friction damper had a better performance than the viscoelastic one due to higher stiffness.