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논문 기본 정보

자료유형
학술저널
저자정보
Mehr, Nasim Partovi (Faculty of Civil Engineering, Amirkabir University of Technology [Tehran Polytechnic]) Khoshnoudian, Faramarz (Faculty of Civil Engineering, Amirkabir University of Technology [Tehran Polytechnic]) Tajammolian, Hamed (Faculty of Civil Engineering, Yazd University)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제20권 제6호
발행연도
2017.1
수록면
641 - 656 (16page)

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The effects of vertical component of earthquakes on torsional amplification due to mass eccentricity in seismic responses of base-isolated structures subjected to near-field ground motions are studied in this paper. 3-, 6- and 9-story superstructures and aspect ratios of 1, 2 and 3 have been modeled as steel special moment frames mounted on Triple Concave Friction Pendulum (TCFP) bearings considering different period and damping ratios. Three-dimensional linear superstructures resting on nonlinear isolators are subjected to both 2 and 3 component near-field ground motions. Effects of mass eccentricity and vertical component of 25 near-field earthquakes on the seismic responses including maximum isolator displacement and base shear as well as peak superstructure acceleration are studied. The results indicate that the effect of vertical component on the responses of asymmetric structures, especially on the base shear is significant. Therefore, it can be claimed that in the absence of the vertical component, mass eccentricity has a little effect on the base shear increase. Additionally, the impact of this component on acceleration is remarkable so the roof acceleration of a nine-story structure has been increased 1.67 times, compared to the case that the structure is subjected to only horizontal components of earthquakes.

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