Evaluation of bearing capacity and energy absorption of high- rise steel frames reinforced by viscous dampers

Development and improvement of the process of design and implementation of high-rise structures with special attention to reducing seismic damage is one of the most important issues studied by researchers. In this regard, steel structures along with viscous dampers are among the structural systems that have attracted the attention of many researchers today. Also in the field of passive control of structures, one of the most powerful tools are viscous dampers that are used to absorb earthquake energy and its loss to reduce the response of the structure. Therefore, the purpose of this study is to investigate the effect of this structural system on the response of 12, 22 and 32 story high-rise structures against seismic loads. To investigate this issue, in this study, a numerical model of viscous damper was first created using Abaqus software and validation of finite element response was performed accordingly. Then, the effect of acceleration of Bam and Tabas earthquakes on the behavior of this structural system was modeled separately and the results including hysteresis diagrams, time history of energy absorption and structural stress were discussed. The results, on average for the three structures in question, showed a 22% increase in energy absorption and a 13% increase in bearing capacity of high-rise steel structures after the application of viscous dampers..‎