بررسي محل قرارگيري بادبند بر روي رفتار سازه هاي دوبلكسي (با اختلاف تراز طبقات) با توجه به پديده ستون كوتاه

Bracing Location in Duplex Structures with Stores Split Level, Considering Short Column Phenomena

Structural irregularity is an important subject that plays significant role in the analysis and investigation of structural behavior. Furthermore, it has been one of the most important factors of building failure in the previous earthquakes. According to the worldwide valid regulations, structural irregularity is divided into plan irregularity and height irregularity. The latter is divided into "stiffuess irregularity", "resistance irregularity" and "mass irregularity" based on the Iranian 2800 standard. However, there is another kind of height irregularity which is referred to in other regulation as SEOCK, because of stores split level in Duplex buildings. In this research the vibrating parameters of buildings of these kinds, including displacement changes and short column formation, are investigated. For this purpose, a 15story steel bracing building (5 different bracing models, each of which in 4 different split level state) is analyzed. Here, two states of structures, "without split level" and "with split level" are compared, by studying the vibrating parameters. Finally, the best location of brace is suggested, accordingly for reducing irregularity and controlling short column phenomena.