NONLINEAR BEHAVIOR OF YIELDING DAMPED BRACING FRAMES

Abstract eng:
Since the nature of earthquakes is the energy which released due to tectonic events, investigations and improvements of behavior of structures based on energy concepts have been concerned. Input energy must be dissipated in order to decrease the damage effects of earthquake, which is received by structures. For this purpose YDBF system is presented which acts as a fuse –when earthquake acts-, and because of its high ductility, the damage of fundamental elements in structures is prevented. Because of nonlinear behavior of such a system, which is based on yielding of ductile style, YDBF increases dissipated and hysteresis energy. This class of dampers often yields in high or intermediate earthquake shakes and their hysteresis loop is relatively thick and stable. In this research seven YDBF are modeled. These models with various percentages of openings are tested and the results of structural behavior due to variation of opening percentages are income.

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