Empirical ground-motion models (GMMs) and associated correlations for cumulative absolute velocity, Arias intensity, and significant durations calibrated on Iranian strong motion database

被引:0
作者
Mehran Davatgari-Tafreshi
Sanjay Singh Bora
机构
[1] The University of Memphis,Department of Civil Engineering
[2] Institute of Geological and Nuclear Science (GNS),undefined
来源
Bulletin of Earthquake Engineering | 2023年 / 21卷
关键词
Ground-motion models; Duration; Arias intensity; Cumulative absolute velocity; Correlations; Iranian plateau;
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摘要
This study presents empirical ground-motion models (GMMs) for estimating Arias intensity (IA), cumulative absolute velocity (CAV) and significant ground-motion duration (D5–75 and D5–95), calibrated on Iranian strong motion database. The dataset consists of 1749 (with two horizontal components) acceleration motion time-series originated from 566 events with moment magnitude (Mw) 3–7.5 range and recorded at 338 stations in the distances range up to 200 km. Common functional forms were adopted for all four models to facilitate easy comparison of derived model parameters and model predictions. Residual distributions and their unbiased variation with predictor variables Mw, hypocentral distance (Rhypo), time-averaged shear-wave velocity in the top 30 m (VS30) indicated robustness of the derived models. This study also examines residual correlations between different pairs of ground-motion intensity measures (GMIMs). The correlations were analysed separately for between-event (δBe\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\delta B}_{e}$$\end{document}) and within-event (δWSes\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\delta WS}_{es}$$\end{document}) component of the residuals. The correlation of δBe\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\delta B}_{e}$$\end{document} between: (1) IA and the two duration measures (D5–75 and D5–95), (2) CAV and the two duration measures were found depending upon the event magnitude (strongest for Mw > 6). Similarly, the correlation of δWSes\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\delta WS}_{es}$$\end{document} between: (1) IA and the two duration measures, (2) CAV and the two duration measures were observed depending upon source-to-site distance (strongest for Rhypo < 50 km). Furthermore, a relatively stronger negative correlation of δWSes\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\delta WS}_{es}$$\end{document} was observed between CAV and station-specific attenuation parameter (κ0) (mainly at softer soil sites) in comparison to that between IA and κ0.
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页码:4139 / 4166
页数:27
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  • [1] Afshari K(2016)Physically parameterized prediction equations for significant duration in active crustal regions Earthq Spect 32 2057-2081
  • [2] Stewart JP(2014)Predictive models for horizontal and vertical conditional mean response spectra at multiple damping levels derived for Europe and the Middle East Bull Earthq Eng 12 517-547
  • [3] Akkar S(2010)The variability of ground-motion prediction models and its components Seismol Res Lett 81 794-801
  • [4] Sandıkkaya MA(2014)NGA-west2 database Earthq Spect 30 989-1005
  • [5] Ay BO(1984)A model for the shape of the Fourier amplitude spectrum of acceleration at high frequencies Bull Seism Soc Am 74 1969-1993
  • [6] Al Atik L(2022)Application of a multi-objective optimization model for the design of piano key weirs with a fixed dam height Can J Civ Eng 49 1764-1778
  • [7] Abrahamson N(2020)Ground motion prediction equations for significant duration using the kik-net database Earthq Spect 37 903-217
  • [8] Bommer JJ(2005)A vector-valued ground motion intensity measure consisting of spectral acceleration and eplison Earthq Eng Struct Dyn 34 1193-1883
  • [9] Scherbaum F(2007)Probabilistic structural response assessment using vector-valued intensity measures Earthq Eng Struct Dyn 36 1861-317
  • [10] Cotton F(2008)Correlation of spectral acceleration values from NGA ground motion models Earthq Spectra 24 299-156