Document Type : Research Article
Authors
1 Department of Civil Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran
2 Department of Civil Engineering, Sistan and Baluchestan University, zahedan, Iran
3 Department of Civil Engineering, Engineering Faculty, Garmsar Branch, Islamic Azad University, Garmsar, Iran
Abstract
In recent years, with the advancement of technology related to structural computations and the significant increasing in knowledge and experience about the seismic behavior of structures, the study of their failure rate has become more serious, so it is necessary to define damage indices (DIs) are those that express amount of failure quantitatively and qualitatively. In many cases, Damage indices are dimensionless parameters, the range of which is usually between zero for no damage state and one for the structural collapse, and the values between these two indices are shown different damage states.
In this study, in order to evaluate and prioritize damage indices, four types of irregular intermediate ductility steel moment-resisting frame structure (mass irregularity) with 2, 5, 8 and 12-story were designed in Etabs software and then nonlinear dynamic time history analysis has been performed under far-fault earthquakes using SeismoStruct software so the parameters needed to obtain structural damage indices such as local indices like local indices: interstory drift, maximum roof displacement, banon failure, kinematic, banon normalized cumulative rotation, cumulative plastic rotation, ductility and park-ang and also global indices: park-ang, energy, roufaiel and meyer, papadopoulos, sozen, rosenblueth, ductility, hysteretic energy, Park-Ang and base shear, banon failure (weighted index) and interstory rotation have been derived, calculated and prioritized.
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