The exact and approximate conditional spectra in the multi-seismic-sources regions

Hossein Ebrahimian; Alireza Azarbakht; Armin Tabandeh; Ali Akbar Golafshani

doi:10.1016/j.soildyn.2012.03.004

The exact and approximate conditional spectra in the multi-seismic-sources regions

Hossein Ebrahimian, Alireza Azarbakht^*, Armin Tabandeh, Ali Akbar Golafshani

^*Corresponding author for this work

Civil And Environmental Engineering

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

18 Citations (Scopus)

Abstract

The exact and two approximate conditional spectra are compared in this manuscript as a target spectrum for the purpose of ground motion selection. The considered site is a real offshore site located at South Pars Gas Field in the Persian Gulf region. This case study site is influenced by four major seismic area sources in which the deaggregation results confirm that many comparable seismic scenarios can be taken into account. Therefore, an alternative to the conventional approximate conditional spectrum is proposed that has a small deviation from the exact solution. In addition, the use of different conditioning status of the probabilistic seismic hazard deaggregation (i.e., occurrence versus exceedance of the target spectral acceleration) for calculating the exact distribution of conditional spectrum was investigated. The results show that one of the proposed approximate approaches leads to conditional distributions which provide acceptable agreement with those obtained from the exact solution.

Original language	English
Pages (from-to)	61-77
Number of pages	17
Journal	Soil Dynamics and Earthquake Engineering
Volume	39
DOIs	https://doi.org/10.1016/j.soildyn.2012.03.004
Publication status	Published - 1 Aug 2012

Funding

This research was primarily supported by the Research and Development Department of Pars Oil and Gas Company (POGC) subsidiary of National Iranian Oil Company (NIOC) under contract number 123/PT. This support is gratefully acknowledged. The authors are also very grateful to both anonymous reviewers for their valuable comments.

Keywords

conditional spectrum
nonlinear dynamic analysis
Persian Gulf region
probabilistic seismic hazard deaggregation
selection of ground motion records
dynamics
seismology
probability distributions
ground motion
seismic hazard
gas industry

Access to Document

10.1016/j.soildyn.2012.03.004

Cite this

@article{0a3ee3272eb9441baff53d5e1400afbf,

title = "The exact and approximate conditional spectra in the multi-seismic-sources regions",

abstract = "The exact and two approximate conditional spectra are compared in this manuscript as a target spectrum for the purpose of ground motion selection. The considered site is a real offshore site located at South Pars Gas Field in the Persian Gulf region. This case study site is influenced by four major seismic area sources in which the deaggregation results confirm that many comparable seismic scenarios can be taken into account. Therefore, an alternative to the conventional approximate conditional spectrum is proposed that has a small deviation from the exact solution. In addition, the use of different conditioning status of the probabilistic seismic hazard deaggregation (i.e., occurrence versus exceedance of the target spectral acceleration) for calculating the exact distribution of conditional spectrum was investigated. The results show that one of the proposed approximate approaches leads to conditional distributions which provide acceptable agreement with those obtained from the exact solution.",

keywords = "conditional spectrum, nonlinear dynamic analysis, Persian Gulf region, probabilistic seismic hazard deaggregation, selection of ground motion records, dynamics, seismology, probability distributions, ground motion, seismic hazard, gas industry",

author = "Hossein Ebrahimian and Alireza Azarbakht and Armin Tabandeh and \{Akbar Golafshani\}, Ali",

year = "2012",

month = aug,

day = "1",

doi = "10.1016/j.soildyn.2012.03.004",

language = "English",

volume = "39",

pages = "61--77",

journal = "Soil Dynamics and Earthquake Engineering",

issn = "0267-7261",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - The exact and approximate conditional spectra in the multi-seismic-sources regions

AU - Ebrahimian, Hossein

AU - Azarbakht, Alireza

AU - Tabandeh, Armin

AU - Akbar Golafshani, Ali

PY - 2012/8/1

Y1 - 2012/8/1

N2 - The exact and two approximate conditional spectra are compared in this manuscript as a target spectrum for the purpose of ground motion selection. The considered site is a real offshore site located at South Pars Gas Field in the Persian Gulf region. This case study site is influenced by four major seismic area sources in which the deaggregation results confirm that many comparable seismic scenarios can be taken into account. Therefore, an alternative to the conventional approximate conditional spectrum is proposed that has a small deviation from the exact solution. In addition, the use of different conditioning status of the probabilistic seismic hazard deaggregation (i.e., occurrence versus exceedance of the target spectral acceleration) for calculating the exact distribution of conditional spectrum was investigated. The results show that one of the proposed approximate approaches leads to conditional distributions which provide acceptable agreement with those obtained from the exact solution.

AB - The exact and two approximate conditional spectra are compared in this manuscript as a target spectrum for the purpose of ground motion selection. The considered site is a real offshore site located at South Pars Gas Field in the Persian Gulf region. This case study site is influenced by four major seismic area sources in which the deaggregation results confirm that many comparable seismic scenarios can be taken into account. Therefore, an alternative to the conventional approximate conditional spectrum is proposed that has a small deviation from the exact solution. In addition, the use of different conditioning status of the probabilistic seismic hazard deaggregation (i.e., occurrence versus exceedance of the target spectral acceleration) for calculating the exact distribution of conditional spectrum was investigated. The results show that one of the proposed approximate approaches leads to conditional distributions which provide acceptable agreement with those obtained from the exact solution.

KW - conditional spectrum

KW - nonlinear dynamic analysis

KW - Persian Gulf region

KW - probabilistic seismic hazard deaggregation

KW - selection of ground motion records

KW - dynamics

KW - seismology

KW - probability distributions

KW - ground motion

KW - seismic hazard

KW - gas industry

UR - https://www.scopus.com/pages/publications/84859736390

U2 - 10.1016/j.soildyn.2012.03.004

DO - 10.1016/j.soildyn.2012.03.004

M3 - Article

AN - SCOPUS:84859736390

SN - 0267-7261

VL - 39

SP - 61

EP - 77

JO - Soil Dynamics and Earthquake Engineering

JF - Soil Dynamics and Earthquake Engineering

ER -

The exact and approximate conditional spectra in the multi-seismic-sources regions

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this