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Effects of near-fault records characteristics on seismic performance of eccentrically braced frames
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 Title & Authors
Effects of near-fault records characteristics on seismic performance of eccentrically braced frames
Eskandari, Reyhaneh; Vafaei, Davoud;
 Abstract
In this paper the effects of fling-step and forward-directivity on the seismic performance of steel eccentrically braced frames (EBFs) are addressed. Four EBFs with various numbers of stories (4-, 8-, 12- and 15-story) were designed for an area with high seismic hazard. Fourteen near-fault ground motions including seven with forward-directivity and seven with fling-step effects are selected to carry out nonlinear time history (NTH) analyses of the frames. Furthermore, seven more far-field records were selected for comparison. Findings from the study reveal that the median maximum links rotation of the frames subjected to three set of ground motions are in acceptable range and the links completely satisfy the requirement stated in FEMA 356 for LS performance level. The arrival of the velocity pulse in a near-fault record causes few significant plastic deformations, while many reversed inelastic cycles result in low-cycle fatigue damage in far-fault records. Near-fault records in some cases are more destructive and the results of these records are so dispersed, especially the records having fling-step effects.
 Keywords
seismic performance;eccentrically braced frame;near-fault earthquake;fling-step;forward-directivity;
 Language
English
 Cited by
1.
Influence of concurrent horizontal and vertical ground excitations on the collapse margins of non-ductile RC frame buildings,;;;

Structural Engineering and Mechanics, 2016. vol.59. 4, pp.653-669 crossref(new window)
1.
A review of research on steel eccentrically braced frames, Journal of Constructional Steel Research, 2017, 128, 53  crossref(new windwow)
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Influence of concurrent horizontal and vertical ground excitations on the collapse margins of non-ductile RC frame buildings, Structural Engineering and Mechanics, 2016, 59, 4, 653  crossref(new windwow)
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