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IN-PLANE BEHAVIOUR OF EARTHEN MATERIALS: A NUMERICAL COMPARISON BETWEEN ADOBE MASONRY, RAMMED EARTH AND COB
- Source :
- Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015).
- Publication Year :
- 2017
- Publisher :
- Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2017.
-
Abstract
- The paper presents a comparison between different numerical modelling approaches aiming to simulate the in-plain behaviour of three types of earthen materials, namely adobe masonry, rammed earth and cob. For this purpose, uniaxial and diagonal compression tests were carried out, which allowed determining important mechanical parameters, such as compressive strength, Young's modulus, Poisson's ratio, shear strength and shear modulus. Furthermore, the tests allowed assessing the level of non-linear behaviour of the respective stress-strain relationships as well as the failure modes. The experimental results were then used for the calibration of numerical models (based on the finite element method) for simulating the non-linear behaviour of the earth materials under in-plane shear loading. Both macro- and micro-modelling approaches were considered for this purpose. The procedures adopted for model calibration established the reliability of various modelling strategies for the different loading conditions. The simplified approach based on macro-modelling shows a satisfactory accuracy and low computational costs. The results reproducing the uniaxial compression are in good correspondence with the post-elastic behaviour observed in the experimental campaign. The micro-modelling approach adopted to reproduce the shear behaviour, even with higher computational cost, represents a suitable tool to predict the adobe masonry and rammed earth collapse mechanisms.<br />This study was partially funded by European Commission within the framework of the project NIKER (grant number 244123) dealing with improving immovable Cultural Heritage assets against the risk of earthquakes. The study was also partly financed by FEDER funds through the Competitivity Factors Operational Programme (project POCI-01-0145-FEDER007633) and by national funds through Portuguese Foundation for Science and Technology (project PTDC/ECM-EST/2777/2014 and grant SFRH/BPD/97082/2013). The authors wish to acknowledge Mr. André Gardei and Mr. Jürgen Kuhn for their support in samples preparation and tests setup.<br />info:eu-repo/semantics/publishedVersion
- Subjects :
- Architectural engineering
business.industry
Adobe
0211 other engineering and technologies
Foundation (engineering)
020101 civil engineering
02 engineering and technology
engineering.material
Masonry
0201 civil engineering
Cultural heritage
Rammed earth
In plane
Digital Image Correlation
Finite Element Method
021105 building & construction
Compression Behaviour
Earthen Materials
engineering
Geotechnical engineering
European commission
Shear Behaviour
business
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
- Accession number :
- edsair.doi.dedup.....ae0406146d757b489ffbd16e76e22156