Ground motion rotation for mainshock-aftershock sequences: Necessary or not?

Weiping Wen; Duofa Ji; Changhai Zhai

doi:10.1016/j.soildyn.2019.105976

Ground motion rotation for mainshock-aftershock sequences: Necessary or not?

Weiping Wen
, Duofa Ji^*
, Changhai Zhai

^*Corresponding author for this work

School of Civil Engineering

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

This manuscript studies the effects of rotating mainshock-aftershock (MSAS) sequences to different orientations on the seismic performance of structures. A total of 222 recorded MSAS ground motions are additionally rotated the given angle away from the fault-parallel direction. Four different engineering demand parameters (EDPs) are used to quantify the seismic performance. The results indicate that the aftershock would change the critical angle of ground motions with respect to the mainshock, and the change in the critical angle can exceed 30°. The effect of ground motion rotation is significant for MSAS sequences, and can exceed 25% for all EDPs considered. The effects of aftershocks on the maximum and median EDPs over all rotation angles are generally comparable. Rotating MSAS sequences into the critical angle is necessary for seismic design and performance evaluation.

Original language	English
Article number	105976
Journal	Soil Dynamics and Earthquake Engineering
Volume	130
DOIs	https://doi.org/10.1016/j.soildyn.2019.105976
State	Published - Mar 2020

Keywords

Aftershock
Critical angle
Engineering demand parameter
Ground motion rotation

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10.1016/j.soildyn.2019.105976

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@article{a3b3edbdaa6440e4ac274fe9e5339f41,

title = "Ground motion rotation for mainshock-aftershock sequences: Necessary or not?",

abstract = "This manuscript studies the effects of rotating mainshock-aftershock (MSAS) sequences to different orientations on the seismic performance of structures. A total of 222 recorded MSAS ground motions are additionally rotated the given angle away from the fault-parallel direction. Four different engineering demand parameters (EDPs) are used to quantify the seismic performance. The results indicate that the aftershock would change the critical angle of ground motions with respect to the mainshock, and the change in the critical angle can exceed 30°. The effect of ground motion rotation is significant for MSAS sequences, and can exceed 25\% for all EDPs considered. The effects of aftershocks on the maximum and median EDPs over all rotation angles are generally comparable. Rotating MSAS sequences into the critical angle is necessary for seismic design and performance evaluation.",

keywords = "Aftershock, Critical angle, Engineering demand parameter, Ground motion rotation",

author = "Weiping Wen and Duofa Ji and Changhai Zhai",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = mar,

doi = "10.1016/j.soildyn.2019.105976",

language = "英语",

volume = "130",

journal = "Soil Dynamics and Earthquake Engineering",

issn = "0267-7261",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Ground motion rotation for mainshock-aftershock sequences

T2 - Necessary or not?

AU - Wen, Weiping

AU - Ji, Duofa

AU - Zhai, Changhai

PY - 2020/3

Y1 - 2020/3

N2 - This manuscript studies the effects of rotating mainshock-aftershock (MSAS) sequences to different orientations on the seismic performance of structures. A total of 222 recorded MSAS ground motions are additionally rotated the given angle away from the fault-parallel direction. Four different engineering demand parameters (EDPs) are used to quantify the seismic performance. The results indicate that the aftershock would change the critical angle of ground motions with respect to the mainshock, and the change in the critical angle can exceed 30°. The effect of ground motion rotation is significant for MSAS sequences, and can exceed 25% for all EDPs considered. The effects of aftershocks on the maximum and median EDPs over all rotation angles are generally comparable. Rotating MSAS sequences into the critical angle is necessary for seismic design and performance evaluation.

AB - This manuscript studies the effects of rotating mainshock-aftershock (MSAS) sequences to different orientations on the seismic performance of structures. A total of 222 recorded MSAS ground motions are additionally rotated the given angle away from the fault-parallel direction. Four different engineering demand parameters (EDPs) are used to quantify the seismic performance. The results indicate that the aftershock would change the critical angle of ground motions with respect to the mainshock, and the change in the critical angle can exceed 30°. The effect of ground motion rotation is significant for MSAS sequences, and can exceed 25% for all EDPs considered. The effects of aftershocks on the maximum and median EDPs over all rotation angles are generally comparable. Rotating MSAS sequences into the critical angle is necessary for seismic design and performance evaluation.

KW - Aftershock

KW - Critical angle

KW - Engineering demand parameter

KW - Ground motion rotation

UR - https://www.scopus.com/pages/publications/85075111591

U2 - 10.1016/j.soildyn.2019.105976

DO - 10.1016/j.soildyn.2019.105976

M3 - 文章

AN - SCOPUS:85075111591

SN - 0267-7261

VL - 130

JO - Soil Dynamics and Earthquake Engineering

JF - Soil Dynamics and Earthquake Engineering

M1 - 105976

ER -

Ground motion rotation for mainshock-aftershock sequences: Necessary or not?

Abstract

Keywords

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