Probabilistic Seismic Demand Assessment of chevron bracing Steel Moment Frames with TADAS damper

Document Type : Research Article


Department of Civil Engineering, Maybod Branch, Islamic Azad University, Maybod, Iran


In this paper, the seismic performance of concentrically braced steel frames equipped with TADAS damper has been investigated with emphasis on earthquake uncertainties. For this purpose, first, relying on laboratory and finite element results, the behavioral model of TADAS damper has been presented and verified. Afterwards, adopting the TADAS damper connection model and non-linear conditions, two-dimensional moment frames were used with 4 m floor height and length of different spans in FEMA P695 regulations and also 10 records were used that have the highest PGA in FEMA P695. To reflect the uncertainties associated with earthquakes, the incremental dynamic analysis procedure was performed.The procedure outcomes, which consist of more than2500nonlinear dynamic analyzes, Thus, nonlinear dynamic analysis of the studied structures was performed and the results of these analyzes were used to estimate the performance of the frames in terms such “limit-state frequencies”, “seismic demand hazard curve”. The results may be used in comparing the studied structures with similar other structures and also as a crisis to the prescriptions issued by design guidelines for the structures under consideration and reveal the difference between the collapse behaviors of low and high-rise structures.


Main Subjects

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