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Static behavior of cob: Experimental testing and finite-element modeling
Bundesanstalt für Materialforschung und -prüfung, Germany.
University of Minho, Portugal.
University of Minho, Portugal.
RISE - Research Institutes of Sweden, Built Environment, CBI Swedish Cement and Concrete Research Institute.ORCID iD: 0000-0003-1904-7426
2019 (English)In: Journal of materials in civil engineering, ISSN 0899-1561, E-ISSN 1943-5533, Vol. 31, no 4, article id 04019021Article in journal (Refereed) Published
Abstract [en]

The aim of this paper is to implement a numerical model to reproduce the nonlinear behavior of cob walls under shear loading. Axial compression, pull-off, and diagonal compression tests were carried out to derive the mechanical parameters. In addition, the stressstrain relationships, the nonlinear behavior, and the failure modes were defined. The experimental results were then used to calibrate a finiteelement model. The material behavior was simulated through a macromodeling approach adopting the total strain rotating crack model. A sensitivity analysis was conducted to assess the effects of varying the parameters with higher uncertainty on the structural behavior. The numerical model achieved good correspondence with the experimental results in terms of simulation of the shear stress-shear strain relationship and of damage pattern.

Place, publisher, year, edition, pages
2019. Vol. 31, no 4, article id 04019021
Keywords [en]
Cob, Compression behavior, Digital image correlation, Finite-element method, Shear behavior, Compression testing, Numerical models, Sensitivity analysis, Shear strain, Shear stress, Uncertainty analysis, Diagonal compression tests, Digital image correlations, Experimental testing, Mechanical parameters, Rotating crack model, Stress-strain relationships, Finite element method
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-37750DOI: 10.1061/(ASCE)MT.1943-5533.0002638Scopus ID: 2-s2.0-85061005839OAI: oai:DiVA.org:ri-37750DiVA, id: diva2:1287478
Note

Funding details: Federación Española de Enfermedades Raras, FEDER, POCI-01-0145-FEDER-007633; Funding text 1: The authors wish to express their gratitude to Mr. André Gardei for his important support in the experimental program and to Mr. Andreas Barner and Ms. Manuela Peuschel for their support with photogrammetric analyses. This study was funded by the European Commission within the framework of the project NIKER (Grant No. 244123) dealing with improving immovable Cultural Heritage assets against the risk of earthquakes. The study was partly financed by FEDER funds through the Competitivity Factors Operational Programme (project POCI-01-0145-FEDER-007633) and by national funds through the Portuguese Foundation for Science and Technology (project PTDC/ECM-EST/2777/2014 and Grant No. SFRH/BPD/97082/2013).

Available from: 2019-02-11 Created: 2019-02-11 Last updated: 2019-03-07Bibliographically approved

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Mueller, Urs

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