Investigation on the seismic behavior of single story concrete frames equipped with metallic yielding dampers


Dept. of Civil Engineering, Sharif University of Technology, Tehran, Iran


Two one-story, single-span concrete frames with different bay to height ratios (B/H1) are considered in order to evaluate the vulnerability of concrete structures equipped with metallic yielding elements (YE) against earthquakes. The nature of damages in structures is based on the rate of absorbed energy. Therefore, investigating the behavior of structures based on energy concept is considered as one of the most important methods toward the designed structures against earthquake load. It is required to concentrate the absorbed energy in some yielding elements, in order to reduce and/or avoid damages the main elements. One powerful technique to retrofit existing structures and seismically design new concrete structures is the use of metallic yielding dampers. The metallic dampers function similar to a fuse by deforming during earthquake, which subsequently can be replaced with new ones. In this study, parametric studies based on static analysis are carried out to determine the best place and angle of these elements in the frames. Furthermore, the responses of these frames against three earthquakes are presented and the comparison of results is performed. It is revealed that yielding element can dissipate up to 60 percent of earthquake energy in a concrete reinforced structure.