Coupling of topographic and stratigraphic effects on seismic response of slopes through 2D linear and equivalent linear analyses

Rizzitano, S.; Cascone, Ernesto; Biondi, Giovanni

doi:10.1016/j.soildyn.2014.09.003

Cited by 73 publications

(24 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This means that the modified (spectral) pseudo-static approach can be D r a f t integrated into available limit equilibrium software providing a useful tool to examine the effect of dynamic soil characteristics (mainly plasticity index, PI in cohesive soil as it is wellknown that it has a direct impact on the degradation of the soil secant shear modulus and its damping ratio) on the shape of the seismic coefficient profile. In fact, effects of soil plasticity on the dynamic response of geotechnical system including natural and artificial slopes have been discussed in literature (Figini et al (2012); Mayoral et al (2015); Rizzitano et al (2014); Fatahi et Tabatabaiefar (2012)), and the herein-reported study extends the previous endeavors (Karray et al 2018) to examine and quantify the effect of PI on the proposed formula of seismic coefficient variation with depth using the same numerical modelling and assumptions. Same geometries and thicknesses of slopes and soil deposits have been also considered.…”

Section: Introductionmentioning

confidence: 70%

Adjustment of spectral pseudo-static approach to account for soil plasticity and zone seismicity

et al. 2019

View full text Add to dashboard Cite

The concept of the spectral pseudo-static procedure has been developed at the Université de Sherbrooke as an alternative to the conventional pseudo-static approach for the seismic stability analysis of clayey slopes. The destabilizing effect of an earthquake is approximated, in the new approach, by an inertial force that hyperbolically varies with depth while being proportional to the maximum acceleration of the seismic event. Its results have been rigorously verified against available static and dynamic laboratory tests, and have been extensively validated by a series of simulations performed using the computer code FLAC. Good agreements have been achieved between the results of the spectral pseudo-static procedure and complete numerical analyses, in terms of the computed safety factors and the critical slip surfaces. This implies that the spectral pseudo-static approach can be integrated into available limit equilibrium (LE) software providing a useful tool to examine the effect of dynamic soil characteristics on the proposed seismic coefficient profiles. The herein-reported study extends the previous endeavors to examine and quantify the effect of plasticity index (PI) (0%, 15%, 30%, 50%, and 100%) on the proposed formula of seismic coefficient profile using the same numerical modelling and assumptions. Original analyses were carried out considering earthquakes compatible with the seismicity of Quebec City (zone 4), and they have been repeated in the current study for earthquakes compatible with other regions having different seismicity (zones 2, 3, and 5). Based on the results of the current analyses, side-formulas were established between the spectral pseudo-static coefficient on ground surface for any value of soil plasticity index (PI) and the corresponding coefficient originally used in the main formula (PI = 30%).

show abstract

Section: Introductionmentioning

confidence: 70%

Adjustment of spectral pseudo-static approach to account for soil plasticity and zone seismicity

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Ashford et al (1997) firstly proposed that topographic amplification could be examined independently to the soil layer amplification. However, more recent studies (Tripe et al, 2013;Assimaki and Gazetas, 2004;Rizzitano et al, 2014;Assimaki et al, 2005;Assimaki and Jeong, 2013) showed that topographic amplification is dependent on soil layer amplification and these two phenomena cannot be examined separately. These studies also present a better representation of the recorded ground motion on site as more realistic soil conditions are considered in the more recent numerical studies.…”

Section: Background Reviewmentioning

confidence: 99%

“…These studies also present a better representation of the recorded ground motion on site as more realistic soil conditions are considered in the more recent numerical studies. Rizzitano et al (2014) showed that a smaller impedance ratio between the soil layer and bedrock results in larger interaction of soil stratigraphy and topography. This is also shown in Assimaki and Jeong (2013) and was first highlighted by Tripe et al (2013) who considered a rigid bedrock assumption in the numerical investigation of topographic effects on soil slopes.…”

Section: Background Reviewmentioning

confidence: 99%

Canyon topography effects on ground motion: Assessment of different soil stiffness profiles

et al. 2019

View full text Add to dashboard Cite

show abstract

“…In order to reduce the wave reflections a 1600 m large mesh was utilized [Amorosi et al, 2008;Rizzitano et al, 2015]. In addition, to minimize the outgoing waves from the truncated lateral sides, viscous adsorbent boundaries were introduced, based on the method described by Lysmer and Kuhlmeyer [1969].…”

Section: Two Dimensional Seismic Response Analysismentioning

confidence: 99%

Site seismic response for a strategic building in the city of Messina by two-dimensional finite element analysis

Capilleri¹,

Massimino²,

Motta³

et al. 2018

Annals of Geophysics

View full text Add to dashboard Cite

It is well recognized that local seismic effects can exert a significant influence on the distribution of damages during earthquakes. Traditionally, these effects have been studied by means of simple one-dimensional (1-D) models of seismic wave propagation which take only the influence of the stratigraphic profile and soil/bedrock properties into account on the seismic response. Conversely, local effects derived from surface topography such as ridge, cliffs etc., which are typically two-dimensional (2-D) and three-dimensional (3-D) problems, have received less attention because of computational time, lack of experimental data and the need of more refined models. It is therefore of great interest to quantitatively evaluate the relative contribution on seismic response of stratigraphic as well as of topographic effects, which can be very different depending on the specific morphological conditions and geotechnical characteristics of the site.

show abstract

Coupling of topographic and stratigraphic effects on seismic response of slopes through 2D linear and equivalent linear analyses

Cited by 73 publications

References 21 publications

Adjustment of spectral pseudo-static approach to account for soil plasticity and zone seismicity

Adjustment of spectral pseudo-static approach to account for soil plasticity and zone seismicity

Canyon topography effects on ground motion: Assessment of different soil stiffness profiles

Site seismic response for a strategic building in the city of Messina by two-dimensional finite element analysis

Contact Info

Product

Resources

About