Seismic Distress and Slope Instability of Municipal Solid Waste Landfills

Zania, Varvara; Tsompanakis, Yiannis; Psarropoulos, Prodromos N.

doi:10.1080/13632460701574605

Cited by 10 publications

(6 citation statements)

References 23 publications

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“…It has also been shown by Zania et al [20] that non-linear behaviour of waste material introduces an additional uncertainty in the evaluation of the dynamic response and stability of waste landfills, mainly due to the wide disperse of the proposed modulus reduction and damping increase curves. However, the potential non-linear material behaviour of the waste mass has not been taken into account in this work aiming to focus on the geometric non-linearity imposed by the low shear strength interface.…”

Section: Outline Of the Numerical Modellingmentioning

confidence: 94%

Base sliding and dynamic response of landfills

Zania

Psarropoulos

Tsompanakis

2010

Advances in Engineering Software

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Section: Outline Of the Numerical Modellingmentioning

confidence: 94%

Base sliding and dynamic response of landfills

Zania

Psarropoulos

Tsompanakis

2010

Advances in Engineering Software

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“…Most of available Newmarkian models, e.g., decoupled models [Makdisi and Seed, 1978;Bray and Rathje, 1998;Rathje and Bray, 1999;Baziar and Jafarian, 2006;Zania et al, 2008] and coupled stick-slip models [Lin and Whitman, 1983;Bray, 1999, 2000;Zania et al, 2010] estimate displacements by hypothesizing a constant inclination for failure surface. Accordingly, they neglect the decrease in the inclination of the Downloaded by [Chulalongkorn University] at 08:51 27 December 2014 sliding soil mass during its downward-stabilizing motion, which is observable in reality [Stamatopoulos, 1996;Chlimintzas, 2003;Stamatopoulos et al, 2011].…”

Section: Literature Reviewmentioning

confidence: 99%

Decoupled Solution for Seismic Permanent Displacement of Earth Slopes Using Deformation-Dependent Yield Acceleration

Baziar

Rezaeipour

Jafarian

2012

Journal of Earthquake Engineering

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The Newmarkian sliding block analogy has been broadly used to evaluate earthquake-induced displacements of natural and man-made earth slopes. However, several modifications have been proposed by researchers to improve the analytical basis of this analogy. In this article, an analytical procedure is proposed to study interactive effect of downward-stabilizing-movement and seismic response of sliding mass through a decoupled procedure. A generalized single degree of freedom (SDOF) system with distributed mass and stiffness is employed to obtain system response, while the sliding mass is considered as a perfect flexible chain moving along the planes with gradually gentler inclinations. The results show that effect of the proposed modification is significant for period ratios (i.e., fundamental period of system to mean period of input motion) close to one, mainly in the case of small slippage lengths. Analyses using harmonic input motion indicate that time interval between initiation and stoppage of sliding phase is lower for smaller sliding length. Accordingly, lower displacements are obtained for smaller sliding lengths. The analyses representing the effect of acceleration coefficient ratio (i.e., the ratio of yield acceleration to maximum horizontal equivalent acceleration, ACR) show that at lower values of ACR, higher contributions of downward-movement are involved in computed displacements. Whereas, as the value of ACR gets larger, this effect is minimized, i.e., the proposed method tends to imitate the conventional decoupled procedure wherein the permanent displacements tend toward zero. Further studies revealed that as period ratio increases (no larger than one) the order of period ratio contribution increases as well, resulting in smaller permanent displacements, while the effect of downward-movement decreases as period ratio becomes larger than one.

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“…The probabilistic calculations involved on the development of the fragility curves, especially if dynamic analyses had to be performed, are extremely time-consuming. Thus, in the current investigation pseudostatic analyses are conducted, in which the required numerical analyses are performed using a FOR-TRAN code developed by the authors [13]. The code utilizes the simplified Bishop method for slope stability analysis under dry conditions using circular failure surfaces within the body of the embankment, and is capable of randomly modifying the mechanical and geometrical characteristics of the model, as well as the acting pseudostatic horizontal acceleration values throughout the probabilistic analyses via the MCS method.…”

Section: Seismic Slope Stabilitymentioning

confidence: 99%