Sun, Jul 3, 2022
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Professor, Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran. , tehranizadeh@aut.ac.ir
Abstract: (155 Views)
In this paper, the seismic performance of a five-story steel structure with the dual system as a lateral load resisting system including the moment-resisting frame and the concentrically braced frame is evaluated under near-field ground motion records with and without pulses. This paper aims to evaluate the pulses’ effects on the probability of the collapse, global damage index, the annual and 50-years collapse risk of the structure with such dual systems which has been less considered in previous research works. To this end, incremental dynamic analyses are performed and to determine the probability that the studied structure will exceed a specific damage state, fragility functions are developed. The golobal damage index of the structure is also computed and a full assessment of the collpase risk of the structure is carrieded out subjected to the near-field ground motion records with and without pulses. Finally, It is concluded that the probability of the collapse, global damage index, the annual and 50-years collapse risk of the structure subjected to the ground motions with pulses is higher than the ground motions without pulses. For the pulse periods which are larger than two times the period of the first mode of the structure, the intensification occurs due to the equalization of the increased period of the first mode of the structure and the period of the pulse.
Keywords: MRF-CBF dual system, Near-field ground motions, Collapse fragility curve, Incremental dynamic analyses, Global damage index, Pulse period
Type of Study: Research |
Subject:
Special
Received: 2022/02/25 | Revised: 2022/03/18 | Accepted: 2022/03/19 | ePublished ahead of print: 2022/06/6
Received: 2022/02/25 | Revised: 2022/03/18 | Accepted: 2022/03/19 | ePublished ahead of print: 2022/06/6
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Journal of Numerical Methods in Civil Engineering © 2016 by K. N. Toosi University of Technology is licensed under Creative Commons Attribution 4.0 International License
Journal of Numerical Methods in Civil Engineering © 2016 by K. N. Toosi University of Technology is licensed under Creative Commons Attribution 4.0 International License
Journal of Numerical Methods in Civil Engineering
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