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Near-fault acceleration pulses and non-acceleration pulses: Effects on the inelastic displacement ratio

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Near-fault acceleration pulses and non-acceleration pulses : Effects on the inelastic displacement ratio. / Chang, Zhiwang; De Luca, Flavia; Goda, Katsuichiro.

In: Earthquake Engineering and Structural Dynamics, 19.06.2019.

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Chang, Zhiwang ; De Luca, Flavia ; Goda, Katsuichiro. / Near-fault acceleration pulses and non-acceleration pulses : Effects on the inelastic displacement ratio. In: Earthquake Engineering and Structural Dynamics. 2019.

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@article{c7cf508efbdb4a6a96bd61296514a657,
title = "Near-fault acceleration pulses and non-acceleration pulses: Effects on the inelastic displacement ratio",
abstract = "Near-fault ground motions can impose particularly high seismic demands on the structures due to the pulses that are typically observed in the velocity time-histories. The velocity-pulses can be further categorized into either a distinct acceleration-pulse (acc-pulse) or a succession of high-frequency, one-sided acceleration spikes (non-acc-pulse).The different characteristics of velocity-pulses imply different frequency-content of the ground motions, potentially causing different seismic effects on the structures.This study aims to investigate the characteristics of the two types of velocity-pulses and their impacts on the inelastic displacement ratio (CR) of single-degree-of-freedom systems. First, a new method that enables an automated classification of velocity-pulses is used to compile a ground motion dataset which consists of 74 acc-pulses and 45 non-acc-pulses. Several intensity measures characterizing different seismological features are then compared using the two groups of records. Finally, the influences of acc-pulses and non-acc-pulses on the CR spectra are studied; the effects of pulse period and hysteretic behavior are also considered. Results indicate that the characteristics of the two types of velocity-pulses differ significantly, resulting in clearly distinct CR spectral properties between acc-pulses and non-acc-pulses. Interestingly, mixing acc-pulses and non-acc-pulses can lead to local ‘bumps’ that were found in the CR spectral shape by previous studies.The findings of this study highlight the importance of distinguishing velocity-pulses of different types when selecting near-fault ground motions for assessing then on linear dynamic response of structures.",
keywords = "near-fault ground motion, acceleration-pulse, velocity-pulse, Bouc-Wen model, inelastic displacement ratio",
author = "Zhiwang Chang and {De Luca}, Flavia and Katsuichiro Goda",
year = "2019",
month = "6",
day = "19",
doi = "10.1002/eqe.3184",
language = "English",
journal = "Earthquake Engineering and Structural Dynamics",
issn = "0098-8847",
publisher = "Wiley",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Near-fault acceleration pulses and non-acceleration pulses

T2 - Effects on the inelastic displacement ratio

AU - Chang, Zhiwang

AU - De Luca, Flavia

AU - Goda, Katsuichiro

PY - 2019/6/19

Y1 - 2019/6/19

N2 - Near-fault ground motions can impose particularly high seismic demands on the structures due to the pulses that are typically observed in the velocity time-histories. The velocity-pulses can be further categorized into either a distinct acceleration-pulse (acc-pulse) or a succession of high-frequency, one-sided acceleration spikes (non-acc-pulse).The different characteristics of velocity-pulses imply different frequency-content of the ground motions, potentially causing different seismic effects on the structures.This study aims to investigate the characteristics of the two types of velocity-pulses and their impacts on the inelastic displacement ratio (CR) of single-degree-of-freedom systems. First, a new method that enables an automated classification of velocity-pulses is used to compile a ground motion dataset which consists of 74 acc-pulses and 45 non-acc-pulses. Several intensity measures characterizing different seismological features are then compared using the two groups of records. Finally, the influences of acc-pulses and non-acc-pulses on the CR spectra are studied; the effects of pulse period and hysteretic behavior are also considered. Results indicate that the characteristics of the two types of velocity-pulses differ significantly, resulting in clearly distinct CR spectral properties between acc-pulses and non-acc-pulses. Interestingly, mixing acc-pulses and non-acc-pulses can lead to local ‘bumps’ that were found in the CR spectral shape by previous studies.The findings of this study highlight the importance of distinguishing velocity-pulses of different types when selecting near-fault ground motions for assessing then on linear dynamic response of structures.

AB - Near-fault ground motions can impose particularly high seismic demands on the structures due to the pulses that are typically observed in the velocity time-histories. The velocity-pulses can be further categorized into either a distinct acceleration-pulse (acc-pulse) or a succession of high-frequency, one-sided acceleration spikes (non-acc-pulse).The different characteristics of velocity-pulses imply different frequency-content of the ground motions, potentially causing different seismic effects on the structures.This study aims to investigate the characteristics of the two types of velocity-pulses and their impacts on the inelastic displacement ratio (CR) of single-degree-of-freedom systems. First, a new method that enables an automated classification of velocity-pulses is used to compile a ground motion dataset which consists of 74 acc-pulses and 45 non-acc-pulses. Several intensity measures characterizing different seismological features are then compared using the two groups of records. Finally, the influences of acc-pulses and non-acc-pulses on the CR spectra are studied; the effects of pulse period and hysteretic behavior are also considered. Results indicate that the characteristics of the two types of velocity-pulses differ significantly, resulting in clearly distinct CR spectral properties between acc-pulses and non-acc-pulses. Interestingly, mixing acc-pulses and non-acc-pulses can lead to local ‘bumps’ that were found in the CR spectral shape by previous studies.The findings of this study highlight the importance of distinguishing velocity-pulses of different types when selecting near-fault ground motions for assessing then on linear dynamic response of structures.

KW - near-fault ground motion

KW - acceleration-pulse

KW - velocity-pulse

KW - Bouc-Wen model

KW - inelastic displacement ratio

UR - http://www.scopus.com/inward/record.url?scp=85064683230&partnerID=8YFLogxK

U2 - 10.1002/eqe.3184

DO - 10.1002/eqe.3184

M3 - Article

JO - Earthquake Engineering and Structural Dynamics

JF - Earthquake Engineering and Structural Dynamics

SN - 0098-8847

ER -