Seismic performance of stabilised/unstabilised rammed earth walls

Assessing the Seismic Behavior of Rammed Earth Walls with an L-Form Cross-Section

Sustainability ◽

10.3390/su11051296 ◽

2019 ◽

Vol 11 (5) ◽

pp. 1296 ◽

Cited By ~ 3

Author(s):

Quoc-Bao Bui ◽

Tan-Trung Bui ◽

Mai-Phuong Tran ◽

Thi-Loan Bui ◽

Hoang-An Le

Keyword(s):

Cross Section ◽

Seismic Performance ◽

Seismic Behavior ◽

Rectangular Cross Section ◽

Construction Material ◽

Numerical Approach ◽

Rammed Earth ◽

3D Fem ◽

Earthquake Performance ◽

Earth Walls

Rammed earth (RE) is a construction material which is made by compacting the soil in a formwork. This material is attracting the attention of the scientific community due to its sustainable characteristics. Among different aspects to be investigated, the seismic performance remains an important topic which needs advanced investigations. The existing studies in the literature have mainly adopted simplified approaches to investigate the seismic performance of RE structures. The present paper adopts a numerical approach to investigate the seismic behavior of RE walls with an L-form cross-section. The 3D FEM model used can take into account the plasticity and damage of RE layers and the interfaces. The model was first validated by an experimental test presented in the literature. Then, the model was employed to assess the seismic performance of a L-form wall of a RE house at different amplitudes of earthquake excitations. Influences of the cross-section form on the earthquake performance of RE walls were also investigated. The results show that the L-form cross-section wall has a better seismic performance than a simple rectangular cross-section wall with similar dimensions. For the L-form cross-section wall, the damage observed concentrates essentially on the connection between two flanges of the wall.

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Experimental testing of the in-plane behavior of bearing modern rammed earth walls

Advances in Structural Engineering ◽

10.1177/1369433218764978 ◽

2018 ◽

Vol 21 (13) ◽

pp. 2045-2055 ◽

Cited By ~ 1

Author(s):

Tiegang Zhou ◽

Bo Liu ◽

Xiang Zhao ◽

Jun Mu

Keyword(s):

Energy Dissipation ◽

Seismic Performance ◽

Failure Modes ◽

Experimental Testing ◽

Mainland China ◽

Shear Capacity ◽

Rammed Earth ◽

Seismic Belt ◽

China Mainland ◽

Earth Walls

With the introduction of the modern rammed earth technique, a large number of modern rammed earth buildings were constructed in China Mainland. China has a vast territory, which faces the Circum-Pacific seismic belt on the east and the Eurasian seismic belt on the south; earthquake has constantly threatened the safety of people’s lives and property. Consequently, it is necessary to probe in the seismic performance of rammed earth buildings. Two un-stabilized rammed earth specimens, one un-stabilized rammed earth reinforced with geogrid sheets’ specimens, and four stabilized rammed earth specimens were built for obtaining a better insight on the behavior of un-stabilized rammed earth/stabilized rammed earth walls under cyclic in-plane loads. Testing results are discussed in terms of failure mode, shear capacity, hysteretic curve, stiffness degradation, and total energy dissipation to provide comparisons of the seismic performance between un-stabilized rammed earth and stabilized rammed earth specimens. Different failure modes indicated that the cohesion between particles and the bond strength between layers are the two key parameters for the shear capacity of rammed earth buildings. It is also demonstrated that stabilized rammed earth specimens have higher shear and energy dissipation capacity but weaker deformation capacity than un-stabilized rammed earth.

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Assessing the seismic performance of rammed earth walls by using discrete elements

Cogent Engineering ◽

10.1080/23311916.2016.1200835 ◽

2016 ◽

Vol 3 (1) ◽

Cited By ~ 10

Author(s):

Quoc-Bao Bui ◽

Tan-Trung Bui ◽

Ali Limam

Keyword(s):

Seismic Performance ◽

Rammed Earth ◽

Discrete Elements ◽

Earth Walls

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Assessing the in-plane seismic performance of rammed earth walls by using horizontal loading tests

Engineering Structures ◽

10.1016/j.engstruct.2017.05.027 ◽

2017 ◽

Vol 145 ◽

pp. 153-161 ◽

Cited By ~ 20

Author(s):

Ranime El-Nabouch ◽

Quoc-Bao Bui ◽

Olivier Plé ◽

Pascal Perrotin

Keyword(s):

Seismic Performance ◽

Rammed Earth ◽

Horizontal Loading ◽

Loading Tests ◽

Earth Walls

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Numerical Investigation of the In-Plane seismic Performance of Unstrengthened and TRM-Strengthened Rammed Earth Walls

International Journal of Architectural Heritage ◽

10.1080/15583058.2019.1629507 ◽

2019 ◽

pp. 1-19

Author(s):

Reza Allahvirdizadeh ◽

Daniel V. Oliveira ◽

Rui A. Silva

Keyword(s):

Numerical Investigation ◽

Seismic Performance ◽

Rammed Earth ◽

Earth Walls

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Design Optimisation Strategies for Solid Rammed Earth Walls in Mediterranean Climates

Energies ◽

10.3390/en14020325 ◽

2021 ◽

Vol 14 (2) ◽

pp. 325

Author(s):

Giada Giuffrida ◽

Maurizio Detommaso ◽

Francesco Nocera ◽

Rosa Caponetto

Keyword(s):

Energy Demand ◽

Construction Material ◽

Base Material ◽

Energy Performance ◽

Embodied Energy ◽

Rammed Earth ◽

Earth Construction ◽

Material Choice ◽

Earth Walls ◽

Raw Earth

The renewed attention paid to raw earth construction in recent decades is linked to its undoubted sustainability, cost-effectiveness, and low embodied energy. In Italy, the use of raw earth as a construction material is limited by the lack of a technical reference standard and is penalised by the current energy legislation for its massive behaviour. Research experiences, especially transoceanic, on highly performative contemporary buildings made with natural materials show that raw earth can be used, together with different types of reinforcements, to create safe, earthquake-resistant, and thermally efficient buildings. On the basis of experimental data of an innovative fibre-reinforced rammed earth material, energy analyses are developed on a rammed earth building designed for a Mediterranean climate. The paper focuses on the influences that different design solutions, inspired by traditional bioclimatic strategies, and various optimised wall constructions have in the improvement of the energy performance of the abovementioned building. These considerations are furthermore compared with different design criteria aiming at minimising embodied carbon in base material choice, costs, and discomfort hours. Results have shown the effectiveness of using the combination of massive rammed earth walls, night cross ventilation, and overhangs for the reduction of energy demand for space cooling and the improvement of wellbeing. Finally, the parametric analysis of thermal insulation has highlighted the economic, environmental, and thermophysical optimal solutions for the rammed earth envelope.

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