Failure of rammed earth walls: From observations to quantifications

Bui, Tan Trung; Bui, Quoc-Bao; Limam, Ali; Maximilien, Sandrine

doi:10.1016/j.conbuildmat.2013.10.053

Cited by 117 publications

(72 citation statements)

References 21 publications

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“…This result is similar to that presented in Bui et al 2014 [9]. The friction angle of about 50° of the earthen layer ( layer =50°)…”

Section: Model Without Interfacessupporting

confidence: 81%

“…This result is also on the same order of the results of Cheah et al 2012 [11] and Bui et al 2014 [9]. The dilatancy angle of the earthen layer can be taken at  layer =12° but this parameter did not play an important role in the case of RE walls under in-plane loading.…”

Section: Model Without Interfacessupporting

confidence: 75%

“…Following previous studies (Bui et al [4], [5], [9]), the presence of an interface did not have an important influence on the behavior of walls under vertical load. Therefore, the aim of this section of the present study is firstly to confirm this point; and then, when the influence of interface parameters is showed negligible under vertical load, the parameters of the earthen layer will be identified.…”

Section: Identification Of the Earthen Layer's Parametersmentioning

confidence: 99%

“…Several investigations have recently been conducted to study the mechanical characteristics of RE by using analytical methods ( [4], [5], [6], [11], [12], [13], [21]) or by employing a numerical model ( [9], [18]). These studies assumed that the cohesion at the interface between earthen layers was perfect.…”

Section: Introductionmentioning

confidence: 99%

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Modeling rammed earth wall using discrete element method

Bui

Limam

et al. 2015

Continuum Mech. Thermodyn.

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Rammed earth is attracting renewed interest throughout the world thanks to its "green" characteristics in the context of sustainable development. Several research studies have thus recently been carried out to investigate this material. Some of them attempted to simulate the rammed earth's mechanical behavior by using analytical or numerical models. Most of these studies assumed that there was a perfect cohesion at the interface between earthen layers. This hypothesis proved to be acceptable for the case of vertical loading, but it could be questionable for horizontal loading. To address this problem, discrete element modeling seems to be relevant to simulate a rammed earth wall. To our knowledge, no research has been conducted thus far using discrete element modeling to study a rammed earth wall. This paper presents an assessment of the discrete element modeling's robustness for rammed earth walls. Firstly, a brief description of the discrete element modeling is presented. Then, thirteen parameters that were necessary for discrete element modeling were identified. The relevance of the model and the material parameters were assessed by comparing them with experimental results from the literature. The results showed that, in the case of vertical loading, interfaces did not have an important effect. In the case of diagonal loading, model with interfaces produced better results. Interface's characteristics can vary from 85% to 100% of the corresponding earthen layer's characteristics.

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“…This result is similar to that presented in Bui et al 2014 [9]. The friction angle of about 50° of the earthen layer ( layer =50°)…”

Section: Model Without Interfacessupporting

confidence: 81%

Section: Model Without Interfacessupporting

confidence: 75%

Section: Identification Of the Earthen Layer's Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling rammed earth wall using discrete element method

Bui

Limam

et al. 2015

Continuum Mech. Thermodyn.

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“…"Stabilized Rammed Earth" (SRE) is used when the composition is stabilized by cement or lime to enhanced mechanical properties and durability of the structure. Stabilization, however, has negative environmental effects such as increased embodied energy [1,5,6].…”

Section: Introductionmentioning

confidence: 99%

Reliability and Uncertainty in Analysis of Rammed Earth Walls

Kianfar¹,

Toufigh²

2017

Proceedings of the 2nd World Congress on New Technologies

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-This paper deals with reliability analysis and uncertainty of rammed earth (RE) structures as a widely used sustainable and environment-friendly structure. Due to lack of comprehensive design standards, the engineers often rely on "rule-of-thumb" methods, which leads to quite conservative or unsafe designs. In this study, uncertainty of load and resistance parameters were included in analysis of rammed earth structures. The reliability index and failure probability of RE structures were evaluated using First-OrderReliability-Method (FORM). The analysis was performed based on the different loads and resistance random variables parameters. Based on the results, the recommended wall thickness by various codes are quite conservative. On the other hands, larger wall thickness is required under severe loadings conditions. The compressive strength of unstabilized materials under severe loading conditions should be more than minimum recommended. The sensitivity analysis on the random variables indicates that the compressive strength and the environmental loads factors are the most important random variables that contribute to reliability of the structures.

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