en Technical Note Technical Note <i><font size="1" face="TimesNewRomanPS-ItalicMT"><font size="1" face="TimesNewRomanPS-ItalicMT"><p align="left">Pullback test has no scrupulous theoretical establishment. It is based on the hypothesis that the response of</p><p align="left">the structure can be related to the response of an equivalent single degree-of-freedom (SDOF) system. This implies that</p><p align="left">the response is controlled by a single mode. In fact, the steel frame of each safe room, which is introduced within the</p><p align="left">unreinforced masonry buildings for protecting the lives of residents in catastrophic earthquake failures, contains a</p><p align="left">SDOF structural system. In pullback test, the steel frame carries its gravity load first, and then it will be pushed under</p><p align="left">an incremental lateral roof displacement pattern, which is imposed to its center of mass. This paper expresses the</p><p align="left">results of 13 pullback tests executed by the authors on the steel frames of safe rooms. The results show that pullback</p><p align="left">test is a practical method for seismic performance evaluation of safe rooms. Also the performance of these frames</p><p align="left">located in a collapsing three storey masonry building is presented with favorable conclusions. In fact, the results of</p><p align="left">pullback test of the safe room located at the ground-floor level were compared with the requirements of Iranian code</p><p align="left">for seismic resistant design and it was concluded that the steel frame had an acceptable performance against seismic</p><p align="left">effects.</p></font></font></i> earthquake, masonry building, safe room, steel frame, vibration, pullback test. 280 288 http://ijce.iust.ac.ir/browse.php?a_code=A-10-106-8&slc_lang=en&sid=1 M. Mazloom 180031947532846006105 180031947532846006105 Yes A.A. Mehrabian 180031947532846006106 180031947532846006106 No