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Effect of rotational components of strong ground motions on behavior of high-rise buildings with outrigger and belt-truss system
The point movement is defined by six components (3 translational and 3 rotational). In earthquake ground motion, the transitional components are effortlessly measurable by a motion recording device, while the rotational components are not straightforwardly available. It has been a long time since ground motion records are recognized to have six-components; be that as it may, this truth is ordinarily ignored within the seismic design and seismic assessment of the structures. In this study, a 60-story steel structure (high-rise building) with bracing core, outrigger and belt truss system in different heights of the structure is subjected to three-component and six-component nonlinear time history analysis from far fault ground motions, near fault ground motions with forwarding directivity and near fault ground motions with fling step. This study shows that six-component analysis can increase the responses of the structure in comparison with three-component analysis. The effect of rotational components on the responses is negligible more in near fault ground motions in comparison with far fault ground motions (except drift and acceleration). Furthermore, the effect of the rotational components on the drift ratio index is more in comparison with near fault ground motions and with fling step (approximately 15% increase).
Effect of rotational components of strong ground motions on behavior of high-rise buildings with outrigger and belt-truss system
The point movement is defined by six components (3 translational and 3 rotational). In earthquake ground motion, the transitional components are effortlessly measurable by a motion recording device, while the rotational components are not straightforwardly available. It has been a long time since ground motion records are recognized to have six-components; be that as it may, this truth is ordinarily ignored within the seismic design and seismic assessment of the structures. In this study, a 60-story steel structure (high-rise building) with bracing core, outrigger and belt truss system in different heights of the structure is subjected to three-component and six-component nonlinear time history analysis from far fault ground motions, near fault ground motions with forwarding directivity and near fault ground motions with fling step. This study shows that six-component analysis can increase the responses of the structure in comparison with three-component analysis. The effect of rotational components on the responses is negligible more in near fault ground motions in comparison with far fault ground motions (except drift and acceleration). Furthermore, the effect of the rotational components on the drift ratio index is more in comparison with near fault ground motions and with fling step (approximately 15% increase).
Effect of rotational components of strong ground motions on behavior of high-rise buildings with outrigger and belt-truss system
Asian J Civ Eng
Khodaparast, Afshin (author) / Tavakoli, HamidReza (author) / Khosravi, Hor (author) / Rajabnejad, Hamid (author)
Asian Journal of Civil Engineering ; 22 ; 1639-1653
2021-12-01
15 pages
Article (Journal)
Electronic Resource
English
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