نوع مقاله : مقاله پژوهشی
نویسندگان
دانشکده مهندسی عمران، دانشگاه تبریز، تبریز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Seismic fragility curves serve as tools that relate earthquake damage to its intensity. These curves specify the probability of exceeding certain limit states associated with the considered damage measures as a function of the seismic intensity measure parameter. Among the engineering demand parameters that can be a measure of the damage of structural and nonstructural components as well as the comfort of the occupants, are the interstory drifts and the absolute floor accelerations. The aim of this paper is to derive and evaluate structural and nonstructural fragility curves of steel building frames equipped with buckling-restrained braces (BRBs) at different damage states based on the above two engineering demand parameters. For this purpose, incremental dynamic analysis (IDA) of the finite element model of a ten-story building frame under 44 FEMA-P695 far-field earthquake records has been used in OpenSees software with Python interpreter (OpenSeesPy). Comparing the fragility curves of the frame model without BRBs and with BRBs showed that the addition of buckling-restrained braces to steel building frames significantly reduces the probability of damage to structural and drift-sensitive nonstructural components in all four damage states (slight, moderate, extensive, and complete); but it does not have a positive effect on the seismic fragility of acceleration-sensitive nonstructural components. Based on the results of this study, it is possible to quantitatively evaluate the effect of buckling-restrained braces on the probability of damage of structural and nonstructural components of steel buildings at different damage states.
کلیدواژهها [English]
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