Modified Newmark Model for Seismic Displacements of Compliant Slopes

Kramer, Steven L.; Smith, Matthew W.

doi:10.1061/(asce)1090-0241(1997)123:7(635)

Cited by 180 publications

(49 citation statements)

References 22 publications

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“…The first approach treats the slope as a deformable media and calculates the time history of the sliding block accordingly. This approach is called decoupled approach after Kramer and Smith (1997). The second approach is on direct application of the Makdisi and Seed charts.…”

Section: Simplified Methods Of Seismic Analysismentioning

confidence: 99%

Application of advanced bounding surface plasticity model in static and seismic analyses of Zipingpu Dam

Kan

Taiebat

2016

Can. Geotech. J.

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Application of advanced bounding surface plasticity model in static and seismic analyses of Zipingpu Dam AbstractThe strong ground motion of the Wenchuan earthquake that hit the Zipingpu Dam in China in 2008 has provided an excellent benchmark to study the behaviour of large modern rockfill dams subjected to seismic loading. The performance of the dam during construction and prior to and after the earthquake loading has been recorded with good accuracy, and provides a reliable database to examine the reliability of available constitutive models and numerical methods in predicting the static and dynamic behaviour of embankment dams. In this paper, an advanced bounding surface plasticity model has been used in a series of numerical analyses to study the static and dynamic behaviour of Zipingpu Dam. The model can take into account particle breakage that may occur in monotonic and cyclic loading of rockfill materials. The material parameters required for the model are calibrated based on the results of available monotonic and cyclic triaxial tests. In the numerical procedure, the staged construction of the dam and the subsequent impounding of the reservoir are simulated, followed by dynamic loading. At each stage, the results of the numerical analysis are compared with in situ monitoring records of the dam. The results of the numerical simulation and the displacements measured after the earthquake are also compared with those estimated by two simplified engineering procedures that are routinely used in practice. The effectiveness and applicability of the simplified procedures to such a large dam subjected to an earthquake with a long duration is also discussed. procedures to such a large dam subjected to an earthquake with a long duration is also discussed.

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Section: Simplified Methods Of Seismic Analysismentioning

confidence: 99%

Application of advanced bounding surface plasticity model in static and seismic analyses of Zipingpu Dam

Kan

Taiebat

2016

Can. Geotech. J.

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“…The method of dynamic slope stability analysis developed by Newmark (1965) and its variations and extensions are widely used in standard engineering practice and described by numerous writers (e.g., Seed 1979;Wilson and Keefer 1983;Finn et al 1997;Rathje 1998;Kramer and Smith 1997;Kramer and Lindwall 2004;Pradel et al 2005;Bray and Travasarou 2007). The Newmark analogy of a sliding block on a sloping plane combines two sets of data: (1) a critical acceleration, a c , at which the slope would reach its ultimate strength and (2) an acceleration time history at the site.…”

Section: Comparison With Engineering Techniquesmentioning

confidence: 99%

Application of an Anisotropic Constitutive Model for Structured Clay to Seismic Slope Stability

Taiebat

Kaynia

Dafalias

2011

J. Geotech. Geoenviron. Eng.

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The anisotropic nature of response and degradation of shear strength from the undisturbed condition to the remolded state are two fundamental and challenging aspects of response in some clay deposits. This paper presents a comprehensive, yet flexible and practical, version of the SANICLAY model and its application to a seismic slope-stability problem. The model is based on the well-known isotropic modified Cam-Clay model with two additional mechanisms to account for anisotropy and destructuration. The model has been efficiently implemented in a three-dimensional (3D) continuum, coupled, dynamic, finite-difference program. The program has been used to analyze the seismic response of clay slopes to gain better insight into the role of the previously mentioned parameters in real applications. Different aspects of the model, including anisotropy and destructuration, and their effects on the earthquake-induced strains and deformations in the slope have then been explored and presented. By providing a link between the model parameters and the soil's undrained shear strength, which is a well-known engineering parameter, a benchmark comparison has been made between the results of the present advanced model and those of an engineering approach. To this end, a modified Newmark sliding-block analysis has been used, in which the yield acceleration is gradually reduced as block sliding progresses during the earthquake. It is observed that although the two analyses display the same trends, the modified Newmark sliding-block method provides conservative results compared with those obtained from the developed simulation model.

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“…The behavior of embankment dams under earthquake shaking has been studied by many researchers [5][6][7][8][9][10][11][12][13]. Park and Kim [14] and Kim et al…”

Section: -Introductionmentioning

confidence: 99%

A regression-based approach to predict crest settlement of embankment dams under earthquake shaking

2018

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Settlement of the embankment dams are among the major damages caused by earthquakes, eventually leading to dam instability. Therefore, accurate assessment of the seismic settlement of embankment dams is of particular concern. This study aims to evaluate the settlement of embankment dams subjected to earthquake loads using regression-based methods. A wideranging real data on crest settlement of embankment dams caused by earthquakes was analyzed.Yield acceleration of dam (a y ), maximum horizontal earthquake acceleration (a max ), fundamental period of dam body (T d ), predominant period of earthquake (T p ), and earthquake magnitude (M w ) were considered as the most influential parameters affecting the seismic crest settlement of embankment dams. Using support vector regression (SVR) method as well as multiple linear regression (MLR) method, two models were developed to estimate earthquake induced settlement of embankment dams. Subsequently, sensitivity analysis was conducted in order to assess the behavior of the proposed models under different conditions. Finally, the accuracy of the proposed models was compared with the existing relationship for estimation of earthquake induced crest settlement of embankment dams. Although both MLR-and SVR-based models have an acceptable accuracy in estimation of the crest settlement of embankment dams under earthquake loading, the SVR-based model has a higher accuracy.

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Modified Newmark Model for Seismic Displacements of Compliant Slopes

Cited by 180 publications

References 22 publications

Application of advanced bounding surface plasticity model in static and seismic analyses of Zipingpu Dam

Application of advanced bounding surface plasticity model in static and seismic analyses of Zipingpu Dam

Application of an Anisotropic Constitutive Model for Structured Clay to Seismic Slope Stability

A regression-based approach to predict crest settlement of embankment dams under earthquake shaking

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