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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. ‎
     
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

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