Fragility analysis of steel MRFs: Effects of frequency-content components of near-fault pulse-like ground motions and setbacks

Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 3655-3666
Author(s):  
Sima Mashhadi ◽  
Farshad Homaei ◽  
Azita Asadi ◽  
Hamed Tajammolian
Keyword(s):  
Ground Motions ◽  
Fragility Analysis ◽  
Frequency Content ◽  
Near Fault ◽  
Steel Mrfs

Seismic fragility analysis of a CANDU type NPP containment building for near-fault ground motions

2006 ◽  
Vol 10 (2) ◽  
pp. 105-112 ◽  
Author(s):  
In-Kil Choi ◽  
Young-Sun Choun ◽  
Seong-Moon Ahn ◽  
Jeong-Moon Seo
Keyword(s):  
Ground Motions ◽  
Fragility Analysis ◽  
Seismic Fragility ◽  
Near Fault

Fragility analysis of tall pier bridges subjected to near-fault pulse-like ground motions

2019 ◽  
Vol 16 (8) ◽  
pp. 1082-1095 ◽  
Author(s):  
Xu Chen ◽  
Jianzhong Li ◽  
Zhongguo Guan
Keyword(s):  
Ground Motions ◽  
Fragility Analysis ◽  
Near Fault

Effects of Fling Step and Forward Directivity on Seismic Response of Buildings

2006 ◽  
Vol 22 (2) ◽  
pp. 367-390 ◽  
Author(s):  
Erol Kalkan ◽  
Sashi K. Kunnath
Keyword(s):  
Seismic Response ◽  
Ground Motions ◽  
High Amplitude ◽  
Moment Frames ◽  
Steel Moment Frames ◽  
Damage Potential ◽  
Near Fault ◽  
Forward Directivity ◽  
Fling Step ◽  
Far Fault

This paper investigates the consequences of well-known characteristics of near-fault ground motions on the seismic response of steel moment frames. Additionally, idealized pulses are utilized in a separate study to gain further insight into the effects of high-amplitude pulses on structural demands. Simple input pulses were also synthesized to simulate artificial fling-step effects in ground motions originally having forward directivity. Findings from the study reveal that median maximum demands and the dispersion in the peak values were higher for near-fault records than far-fault motions. The arrival of the velocity pulse in a near-fault record causes the structure to dissipate considerable input energy in relatively few plastic cycles, whereas cumulative effects from increased cyclic demands are more pronounced in far-fault records. For pulse-type input, the maximum demand is a function of the ratio of the pulse period to the fundamental period of the structure. Records with fling effects were found to excite systems primarily in their fundamental mode while waveforms with forward directivity in the absence of fling caused higher modes to be activated. It is concluded that the acceleration and velocity spectra, when examined collectively, can be utilized to reasonably assess the damage potential of near-fault records.

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