Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental and Numerical Studies on Cohesion and Friction Angle of Rammed Earth Material
Rammed earth (RE) is a construction material which is manufactured by dynamically compacting the soil in a formwork. The RE wall is composed of several earthen layers about 12-15 cm thick. This material has been attracting numerous scientific researches because of its low embodied energy and a positive hygrothermal behavior. Several recent studies tried to identify mechanical characteristics of this material, however, there have been few studies which identified the cohesion c and friction angle φ directly by experiments. This paper presents an investigation on c and φ of RE through shear box tests (within the earthen layer). The specimens were directly taken from RE walls. Two types of specimens were taken: specimens at the upper part of the layers and specimens at the middle part of the layers. Then, the obtained experimental values were used in a numerical model (with Drucker-Prager’s criterion) to simulate pushover tests on two RE walls. The results showed the interfaces were needed to get better results. The best values identified for earthen layers were φlayer = 44° and clayer = 135kPa and the interfaces having 50-70% of the corresponding earthen layer characteristics.
Experimental and Numerical Studies on Cohesion and Friction Angle of Rammed Earth Material
Rammed earth (RE) is a construction material which is manufactured by dynamically compacting the soil in a formwork. The RE wall is composed of several earthen layers about 12-15 cm thick. This material has been attracting numerous scientific researches because of its low embodied energy and a positive hygrothermal behavior. Several recent studies tried to identify mechanical characteristics of this material, however, there have been few studies which identified the cohesion c and friction angle φ directly by experiments. This paper presents an investigation on c and φ of RE through shear box tests (within the earthen layer). The specimens were directly taken from RE walls. Two types of specimens were taken: specimens at the upper part of the layers and specimens at the middle part of the layers. Then, the obtained experimental values were used in a numerical model (with Drucker-Prager’s criterion) to simulate pushover tests on two RE walls. The results showed the interfaces were needed to get better results. The best values identified for earthen layers were φlayer = 44° and clayer = 135kPa and the interfaces having 50-70% of the corresponding earthen layer characteristics.
Experimental and Numerical Studies on Cohesion and Friction Angle of Rammed Earth Material
El-Nabouch, R. (Autor:in) / Bui, Q.-B. (Autor:in) / Perrotin, P. (Autor:in) / Plé, O. (Autor:in)
Sixth Biot Conference on Poromechanics ; 2017 ; Paris, France
Poromechanics VI ; 864-872
06.07.2017
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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