An analytical bond stress-slip model for a TRM composite compatible with rammed earth. (6th December 2021)

• Record Type: Journal Article
• Authors: Romanazzi, A.; Oliveira, D.V.; Silva, R.A.
• Is Part Of: Construction & building materials. Volume 310(2021)
• Publication Date: 2021-12-06
• Subjects: Rammed earth -- Analytical model -- Bond stress-slip law -- Textile reinforced mortar -- Direct boundary approach; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2021.125228
• Languages: English
• ISSNs: 0950-0618

Abstract

Graphical abstract: Highlights: Analytical approach for composite materials is implemented to a novel TRM-strengthening compatible with rammed earth. Constitutive law of interface shear stress transference predicts the overall composite load capacity. Damage arises due to friction at the interface between the components. A novel damage model describes the frictional wearing as function of the slip. The analytical approach is implemented with the damage model and validated with experimental data. Abstract: A textile reinforced mortar (TRM) compatible with rammed earth structures is proposed to mitigate their seismic vulnerability. Being TRM a composite material, defining the matrix-fibre interface relationship is fundamental to predict the performance of strengthened structures. In this framework, an existing analytical approach with a newly damage model was adapted to a specific TRM composite system that is not yet addressed in literature. Hence, an adhesion-friction law was calibrated with basis on recent experimental observations. In conclusion, the proposed algorithm reproduces adequately the elastic and nonlinear response of the matrix-fibre interface and predicts with accuracy the pull-out strength of the composite.