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Experimental Shear Behaviour of Rammed Earth Strengthened with a TRM-Based Compatible Technique
Tijdschriftbijdrage - Tijdschriftartikel
Earthen constructions are spread worldwide, not only as architectural heritage but also as
new buildings, in which a total of around one fourth of the global population is estimated to live in.
Among the different raw earth techniques, rammed earth was widely used to build vernacular
dwellings in different regions. Despite the raising awareness for the high seismic hazard, recognized
seismic vulnerability and high seismic exposure associated with earthen structures, the reduction of
their seismic risk has been a topic insufficiently addressed. In general, the seismic vulnerability of
rammed earth structures is due to poor connections between structural elements (walls and floors),
high self-weight and low strength of the material. Hence, a TRM-based strengthening technique is
proposed to improve their seismic capacity. To estimate the enhancement of the in-plane
performance achieved with the TRM, an experimental program was conducted. Rammed earth
wallets were tested under diagonal compression considering their unstrengthened and strengthened
condition. The TRM strengthening was performed by embedding a glass fibre mesh (GRE) or a
nylon mesh (NRE) in a compatible earth-based mortar. In general, the proposed TRM-based
strengthening seems to improve the shear behaviour of rammed earth by enhancing the shear
strength and promoting stress distribution after cracking, while no significant influence on the shear
modulus of rammed earth seems to occur.
Tijdschrift: Key Engineering Materials
ISSN: 1662-9795
Volume: 817
Pagina's: 544 - 551
Jaar van publicatie:2019
Toegankelijkheid:Open