Please wait a minute...
Shopping Cart Email List Chinese
Advanced Search Fig/Tab
Frontiers of Structural and Civil Engineering

ISSN 2095-2430

ISSN 2095-2449(Online)

CN 10-1023/X

Postal Subscription Code 80-968

2018 Impact Factor: 1.272

Featured Articles  |  Most Downloaded  |  Most Reading
Online Submission Subscribe to Our RSS Content Feed
Front Struc Civil Eng    2012, Vol. 6 Issue (1) : 44-52    https://doi.org/10.1007/s11709-012-0138-x
RESEARCH ARTICLE
Efficiency of scalar and vector intensity measures for seismic slope displacements
Gang WANG()
Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong, China
 Download: PDF(602 KB)   HTML
 Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract

Ground motion intensity measures are usually used to predict the earthquake-induced displacements in earth dams, soil slopes and soil structures. In this study, the efficiency of various single ground motion intensity measures (scalar IMs) or a combination of them (vector IMs) are investigated using the PEER-NGA strong motion database and an equivalent-linear sliding-mass model. Although no single intensity measure is efficient enough for all slope conditions, the spectral acceleration at 1.5 times of the initial slope period and Arias intensity of the input motion are found to be the most efficient scalar IMs for flexible slopes and stiff slopes respectively.

Vector IMs can incorporate different characteristics of the ground motion and thus significantly improve the efficiency over a wide range of slope conditions. Among various vector IMs considered, the spectral accelerations at multiple spectral periods achieve high efficiency for a wide range of slope conditions. This study provides useful guidance to the development of more efficient empirical prediction models as well as the ground motion selection criteria for time domain analysis of seismic slope displacements.
Keywords seismic slope displacements      intensity measures      empirical prediction     
Corresponding Author(s): WANG Gang,Email:gwang@ust.hk   
Issue Date: 05 March 2012
 Cite this article:   
Gang WANG. Efficiency of scalar and vector intensity measures for seismic slope displacements[J]. Front Struc Civil Eng, 2012, 6(1): 44-52.
 URL:  
https://academic.hep.com.cn/fsce/EN/10.1007/s11709-012-0138-x
https://academic.hep.com.cn/fsce/EN/Y2012/V6/I1/44
Fig.1  (a) Computed permanent displacements ( = 0.1 g). Insert: acceleration time history; (b) modulus ratio and damping curve for nonlinear soils
IMnamedefinitionunits
PGApeak ground accelerationmax?t|a(t)|, the maximum absolute value of the acceleration time historyg
Saspectral accelerationSa(T), peak acceleration of a single-DOF elastic oscillator with specified period T and 5% damping ratiog
ASIAcceleration spectrum intensity∫T=0.10.5sSa(T)dT, integration of Sa(T) over T= 0.1 s to 0.5 s.g
IAarias intensity [14]π2g∫0∞|a(t)|2dt, time integration of the acceleration squaredg?s
CAVcumulative absolute velocity∫0∞|a(t)|dt, time integration of the absolute value of acceleration.g?s
D5-95significant duration [15]t(0.95IA)-t(0.05IA), time used to accumulate from 5% to 95% IAs
Tmmean period [16]weighted mean period of Fourier spectrums
Tab.1  Definition of scalar
Fig.2  Seismic displacements vs. for a stiff slope ( = 0.1 g, = 0.1 s)
Fig.3  Seismic displacements vs. for a flexible slope ( = 0.1 g, = 1 s)
Fig.4  Contours of adjusted coefficients of determination for scalar
Fig.5  Contours of adjusted coefficients of determination for vector
1 Newmark N M. Effects of earthquakes on dams and embankments. Geotechnique , 1965, 15(2): 139–160
doi: 10.1680/geot.1965.15.2.139
2 Ambraseys N N, Menu J M. Earthquake-induced ground displacements. Earthquake Engineering & Structural Dynamics , 1988, 16(7): 985–1006
doi: 10.1002/eqe.4290160704
3 Jibson R W. Regression models for estimating coseismic landslide displacement. Engineering Geology , 2007, 91(2-4): 209–218
doi: 10.1016/j.enggeo.2007.01.013
4 Saygili G, Rathje E M. Empirical prediction models for earthquake-induced sliding displacements of slopes. Journal of Geotechnical and Geoenvironmental Engineering , 2008, 134(6): 790–803
doi: 10.1061/(ASCE)1090-0241(2008)134:6(790)
5 Jibson R W. Predicting earthquake-induced landslide displacements using Newmark’s sliding block analysis. Transportation Research Record , 1993, 1411: 9–17
6 Romeo R. Seismically induced landslide displacements: a predictive model. Engineering Geology , 2000, 58(3-4): 337–351
doi: 10.1016/S0013-7952(00)00042-9
7 Watson-Lamprey J, Abrahamson N. Selection of ground motion time series and limits on scaling. Soil Dynamics and Earthquake Engineering , 2006, 26(5): 477–482
doi: 10.1016/j.soildyn.2005.07.001
8 Rathje E M, Bray J D. Nonlinear coupled seismic sliding analysis of earth structures. Journal of Geotechnical and Geoenvironmental Engineering , 2000, 126(11): 1002–1014
doi: 10.1061/(ASCE)1090-0241(2000)126:11(1002)
9 Bray J D, Travasarou T. Simplified procedure for estimating earthquake-induced deviatoric slope displacements. Journal of Geotechnical and Geoenvironmental Engineering , 2007, 133(4): 381–392
doi: 10.1061/(ASCE)1090-0241(2007)133:4(381)
10 Schnabel P B, Lysmer J, Seed H B. SHAKE—A Computer Program for Earthquake Response Analysis of Horizontally Layered Sites, Earthquake Engineering Research Center, Report No. UCB/EERC-72/12. University of California, Berkeley , 1972
11 Chiou B, Darragh R, Gregor N, Silva W. NGA project strong-motion database. Earthquake Spectra , 2008, 24(1): 23–44
doi: 10.1193/1.2894831
12 Vucetic M, Dobry R. Effect of soil plasticity on cyclic response. Journal of Geotechnical Engineering , 1991, 117(1): 89–107
doi: 10.1061/(ASCE)0733-9410(1991)117:1(89)
13 Kramer S L. Geotechnical Earthquake Engineering, Prentice Hall , 1996
14 Arias A. A measure of earthquake intensity. In: Seismic Design for Nuclear Power Plants , Hansen RJ, ed. Cambridge, MA: MIT Press, 1970, 438–483
15 Kempton J J, Stewart J P. Prediction equations for significant duration of earthquake ground motions considering site and near-source effects. Earthquake Spectra , 2006, 22(4): 985–1013
doi: 10.1193/1.2358175
16 Rathje E M, Abrahamson N A, Bray J D. Simplified frequency content estimate of earthquake ground motions. Journal of Geotechnical and Geoenvironmental Engineering , 1998, 124(2): 150–159
doi: 10.1061/(ASCE)1090-0241(1998)124:2(150)
17 Travasarou T, Bray J D. Optimal ground motion intensity measures for assessment of seismic slope displacements. Pacific Conf. on Earthquake Engineering, Christchurch, New Zealand , 2003
18 Wang G. A ground motion selection and modification method capturing response spectrum characteristics and variability of scenario earthquakes. Soil Dynamics and Earthquake Engineering , 2011, 31(4): 611–625
doi: 10.1016/j.soildyn.2010.11.007
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed