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Probabilistic Assessment on the Performance of Tiered Geosynthetic Reinforced Soil Walls Using RLEM and RFEM
https://orcid.org/http://orcid.org/0000-0001-9144-2717
Geosynthetic reinforced soil (GRS) structures are constructed in the tiered configurations for various reasons, particularly reducing displacement, economic aspects, flexibility, and construction constraints. This paper aims to investigate the probabilistic stability analysis of tiered GRS walls under seismic loading conditions, considering soil spatial variability, and cross-correlation among input variables. Several sensitive and parametric analyses were used to examine the effect of uncertainties on stability indicators. In this regard, calibrated random limit equilibrium methods (RLEM) were employed to determine critical slip surface. Supplementary optimization search techniques, in conjunction with non-circular methods, are among the advantages of this investigation to improve the accuracy of determining stability indicators over the previous research. It was concluded that the GRS walls with modular concrete block facing tend to perform well under seismic loads due to their ability to reduce failure probabilities. Statistical analyses also showed that cross-correlation between cohesion and friction angle, as well as the coefficient of the variation of random variables, significantly affect the probability of failure (Pf). The results indicated that failure probability increased from zero to about 9% because of increasing the coefficient of variation from 5 to 15%, which presents a severe risk to the GRS wall's stability. Furthermore, it was determined that as the negative value of cross-correlation between soil cohesion (c) and soil friction angle (φ) increased, the probability of failure decreased. This study compared the seismic performance of tiered GRS walls using RLEM methods and the random finite-element method (RFEM). In addition, it was shown that RFEM approach results in a higher factor of safety values than circular and non-circular RLEMs, with a difference of about 6% compared to Sarma’s method.
Probabilistic Assessment on the Performance of Tiered Geosynthetic Reinforced Soil Walls Using RLEM and RFEM
https://orcid.org/http://orcid.org/0000-0001-9144-2717
Geosynthetic reinforced soil (GRS) structures are constructed in the tiered configurations for various reasons, particularly reducing displacement, economic aspects, flexibility, and construction constraints. This paper aims to investigate the probabilistic stability analysis of tiered GRS walls under seismic loading conditions, considering soil spatial variability, and cross-correlation among input variables. Several sensitive and parametric analyses were used to examine the effect of uncertainties on stability indicators. In this regard, calibrated random limit equilibrium methods (RLEM) were employed to determine critical slip surface. Supplementary optimization search techniques, in conjunction with non-circular methods, are among the advantages of this investigation to improve the accuracy of determining stability indicators over the previous research. It was concluded that the GRS walls with modular concrete block facing tend to perform well under seismic loads due to their ability to reduce failure probabilities. Statistical analyses also showed that cross-correlation between cohesion and friction angle, as well as the coefficient of the variation of random variables, significantly affect the probability of failure (Pf). The results indicated that failure probability increased from zero to about 9% because of increasing the coefficient of variation from 5 to 15%, which presents a severe risk to the GRS wall's stability. Furthermore, it was determined that as the negative value of cross-correlation between soil cohesion (c) and soil friction angle (φ) increased, the probability of failure decreased. This study compared the seismic performance of tiered GRS walls using RLEM methods and the random finite-element method (RFEM). In addition, it was shown that RFEM approach results in a higher factor of safety values than circular and non-circular RLEMs, with a difference of about 6% compared to Sarma’s method.
Probabilistic Assessment on the Performance of Tiered Geosynthetic Reinforced Soil Walls Using RLEM and RFEM
https://orcid.org/http://orcid.org/0000-0001-9144-2717
Geosynthetic reinforced soil (GRS) structures are constructed in the tiered configurations for various reasons, particularly reducing displacement, economic aspects, flexibility, and construction constraints. This paper aims to investigate the probabilistic stability analysis of tiered GRS walls under seismic loading conditions, considering soil spatial variability, and cross-correlation among input variables. Several sensitive and parametric analyses were used to examine the effect of uncertainties on stability indicators. In this regard, calibrated random limit equilibrium methods (RLEM) were employed to determine critical slip surface. Supplementary optimization search techniques, in conjunction with non-circular methods, are among the advantages of this investigation to improve the accuracy of determining stability indicators over the previous research. It was concluded that the GRS walls with modular concrete block facing tend to perform well under seismic loads due to their ability to reduce failure probabilities. Statistical analyses also showed that cross-correlation between cohesion and friction angle, as well as the coefficient of the variation of random variables, significantly affect the probability of failure (Pf). The results indicated that failure probability increased from zero to about 9% because of increasing the coefficient of variation from 5 to 15%, which presents a severe risk to the GRS wall's stability. Furthermore, it was determined that as the negative value of cross-correlation between soil cohesion (c) and soil friction angle (φ) increased, the probability of failure decreased. This study compared the seismic performance of tiered GRS walls using RLEM methods and the random finite-element method (RFEM). In addition, it was shown that RFEM approach results in a higher factor of safety values than circular and non-circular RLEMs, with a difference of about 6% compared to Sarma’s method.
Probabilistic Assessment on the Performance of Tiered Geosynthetic Reinforced Soil Walls Using RLEM and RFEM
Int. J. of Geosynth. and Ground Eng.
Nazari, Reza A. (Autor:in) / Sharafi, Hassan (Autor:in) / Jafari, Habib (Autor:in)
01.12.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Parametric seismic analysis of tiered geosynthetic-reinforced segmental retaining walls
| British Library Conference Proceedings | 2004