Comparison of dynamic responses of an embankment dam based on equivalent linear and nonlinear methods

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Abstract

Usually permanent displacements of slopes are calculated by combination of Newmark method and linear or equivalent linear dynamic analysis. In these analyses, calculating the real acceleration is impossible, because the real acceleration of sliding block should not be more than yield acceleration (Kc), otherwise values of displacements will be insignificant. Therefore permanent displacements are usually calculated based on unreal accelerations in linear analysis. On the other hand in nonlinear analyses the acceleration of sliding blocks will not be more than Kc and permanent displacements occur during analysis. In this paper, this paradox is compared in the dynamic analyses of Alborz embankment dam against Maximum Credible Earthquake motion. Although maximum permanent displacements in these two methods of analyses are nearly equal (1.55 m and 1.5 m), but maximum crest accelerations are very different.

Original languageEnglish
Title of host publication12th International Conference on Computer Methods and Advances in Geomechanics 2008
Pages2628-2635
Number of pages8
Volume4
Publication statusPublished - 01 Dec 2008
Externally publishedYes
Event12th International Conference on Computer Methods and Advances in Geomechanics 2008 - Goa Marriott Resort, Goa, India
Duration: 01 Oct 200806 Oct 2008
https://web.archive.org/web/20081224120706/http://www.12iacmag.com/ (Conference website)

Conference

Conference12th International Conference on Computer Methods and Advances in Geomechanics 2008
Abbreviated titleGeomechanics in the Emerging Social and Technological Age
CountryIndia
CityGoa
Period01/10/0806/10/08
OtherThe IACMAG conference series has covered computer methods, material modeling and testing, applications to a wide range of geomechanical problems, and recent advances in various areas that may not necessarily involve computer methods. The first conference in this series was held at Waterways Experiment Station, Vicksburg, (USA)-1972, and the subsequent were held in Blacksburg (USA)-1976, Aachen (Germany)-1979, Edmonton (Canada)-1982, Nagoya (Japan)-1985, Innsbruck (Austria)-1988, Cairns (Australia)-1991, Morgantown (USA)-1994, Wuhan (China)-1997, Tucson (USA)-2001, and Turin (Italy)–2005. The 12th Conference (1 to 6 October 2008, to be held in Goa, India) will address recent developments and relevant issues in computer methods, constitutive models and applications to different areas of Geomechanics, and emerging and important topics, and future needs, documented case studies with integration of theory, laboratory and field tests, and validation procedures. This will be consistent with the continuing theme of IACMAG conferences and the International Journal of Geomechanics, namely Fundamentals through Applications. The special theme for the 12th International Conference has been chosen as Geomechanics in the Emerging Social & Technological Age. The conference will endeavor to stress on problems raised by the present day society due to rapid industrialization and globalization, in addition to the objectives covered by the previous conferences. The conference aims to focus on some very recent and emerging trends in geomechanics such as mechanics of unsaturated soils, micromechanics, nanomechanics, bio-geo interface, infrastructure geomechanics and geomechanics for ancient monuments.
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  • Cite this

    Roosta, R. M. (2008). Comparison of dynamic responses of an embankment dam based on equivalent linear and nonlinear methods. In 12th International Conference on Computer Methods and Advances in Geomechanics 2008 (Vol. 4, pp. 2628-2635)