Strengthening of rammed earth structural elements. Mechanical behaviour under shear and cyclic loading

  • An experimental investigation was carried out to study the in-plane shear behaviour of rammed earth structural elements strengthened with polyester fabric strips. The original idea for the retrofitting with polyester fabric strips was to introduce a vertical element for walls in order to take up horizontal loads resulting in a shear response of the building element. It has to be considered that vertical slits into the walls for fixing the strips are points of weakness and have to be mitigated by the adhesive. In this case a base coat mortar was employed. Strengthened elements were tested to exploit the strength potential of earthen materials and to solve its lack of tensile strength, significantly improving not only strength but also ductility. As part of the study results of a testing campaign of unstrengthened structural elements were considered. Strengthened elements were tested in diagonal compression/shear and cyclic shear-compression. A unique reinforcement orientation was used.An experimental investigation was carried out to study the in-plane shear behaviour of rammed earth structural elements strengthened with polyester fabric strips. The original idea for the retrofitting with polyester fabric strips was to introduce a vertical element for walls in order to take up horizontal loads resulting in a shear response of the building element. It has to be considered that vertical slits into the walls for fixing the strips are points of weakness and have to be mitigated by the adhesive. In this case a base coat mortar was employed. Strengthened elements were tested to exploit the strength potential of earthen materials and to solve its lack of tensile strength, significantly improving not only strength but also ductility. As part of the study results of a testing campaign of unstrengthened structural elements were considered. Strengthened elements were tested in diagonal compression/shear and cyclic shear-compression. A unique reinforcement orientation was used. The results of these tests are presented in this paper and include the load-displacement behaviours, crack patterns, failure modes. The results showed that the reinforcement was the most effective under cyclic shear-compression tests, with increase in load and displacement capacity observed. Under diagonal compression the reinforcement did not likely contribute significantly to the shear resistance, due to a lack of embedment length of the strips.zeige mehrzeige weniger

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  • Miccoli et al._PROHITECH2017_1.pdf
    eng
  • Abstract_Conclusion_Strengthening of rammed earth structural elements_PROHITEC 2017.pdf
    eng
  • Deckblatt_Impressum_Inhaltsverzeichnis_PROHITEC 2017.pdf
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Metadaten
Autor*innen:Lorenzo Miccoli, U. Müller, Patrick Fontana
Persönliche Herausgeber*innen:F. M. Mazzolani, A. Lamas, L. Calado, J. M. Proenca, B. Faggiano
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):PROHITECH '17 - 3rd International Conference on Protection of Historical Constructions
Jahr der Erstveröffentlichung:2017
Verlag:IST-Press
Erste Seite:157
Letzte Seite:158
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:Diagonal compression tests; Polyester fabric strips; Rammed earth; Shear-compression tests; Strengthening
Veranstaltung:3rd International Conference on Protection of Historical Constructions (PROHITECH 2017)
Veranstaltungsort:Lisbon, Portugal
Beginndatum der Veranstaltung:12.07.2017
Enddatum der Veranstaltung:15.07.2017
ISBN:978-989-8481-58-0
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:10.08.2017
Referierte Publikation:Nein
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