Investigation of Seismic Performance of Steel Structures of Moment Frames under Near and Far-Field Earthquakes by Optimizing the ADAS Damping Section at the Connection of the Structure

Abstract

In this paper, the time history analysis of the seismic performance of moment frame steel structures under near and far-field earthquake is performed by optimizing the ADAS damper cross-section at the joint connection. The research method was software and dynamic analysis of the time history of different structures. In modelling the present study, first a numerical Model was made in Abaqus software according to the experimental conditions of the reference Model, and validation was performed. Numerical Model deformation and hysteresis behaviour of the Model with a slit damper were compared with the experimental Model, and after confirming the results of different Models were analyzed. For this purpose, three types of structures with varying heights of 17.5, 35, and 52.5 meters were Modeled. In this research, dynamic analyses of time history under earthquake and Puss over were used.  The effect of damping location change at different heights of structures was investigated. The results show that in a five-story building, the use of a Slit damper in the first and second floors minimizes the amount of roof displacement of the structure by 30%. Using a Slit damper on all floors, the amount of roof displacement of the structure is reduced by 52%. In building with a height of 35 meters, the use of a Slit damper in the first and second floors reduces the amount of roof displacement of the building by 22. With the help of Slit damper on all floors, the amount of movement of the roof of the structure has been reduced by 47%. With the use of Slit damper in all floors, the amount roof displacement of the building has been reduced by 47%. In building with a height of 35 meters, the help of Slit damper on the first and second floors, the amount of roof displacement of the building by 36% and the use of Slit damper in all floors, the amount of movement of the roof of the building has decreased by 60%. As a general conclusion, the use of Slit dampers at the junction of beams to columns improves the performance of steel structures.