Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Constitutive models and statistical analysis of the short-term tensile response of geosynthetics after damage
Graphical abstract Display Omitted
Highlights Abrasion damage changed the shape of load vs. strain curves of the geogrid and the geocomposite. Polynomial models fitted the ultimate tensile strength better than hyperbolic-based models. Hyperbolic-based models fitted the secant stiffness better than polynomial models. Model parameter α was not a constant, as it varied according to the condition of the material. Adjustment coefficients and reduction factors were usedto predict model parameters after damage.
Abstract The objective of this research was to analyse the tensile response of three geosynthetics, to apply constitutive equations, and propose values for model parameters to represent the nonlinear behaviour of these materials in the short-term, supported by statistical analysis. Data for specimens of a nonwoven geotextile, a woven geogrid and a reinforcement geocomposite previously submitted to mechanical damage, abrasion damage, and mechanical damage followed by abrasion damage were analysed. Nonlinear regressions of the experimental results were performed to fit the load vs. strain curves to constitutive equations. For each geosynthetic, the results of damaged specimens were statistically compared to those of the undamaged ones to observe the influence of the induced damage on the tensile behaviour of the material. Experimental results were statistically compared with those obtained by the constitutive models to verify if the tensile properties and the model parameters were properly estimated. For the geotextile, significant changes in tensile properties were noticed only after sequential mechanical damage and abrasion damage. For the geogrid and the reinforcement geocomposite, abrasion damage was predominant due to considerable changes in the tensile properties and the shape of the load vs. strain curves. In general, the polynomial models fitted the ultimate tensile strength slightly better, while the hyperbolic-based models presented better approximation of the secant stiffness. For hyperbolic-based models, estimating curves for damaged materials from model parameters of undamaged specimens by applying adjustment coefficients and reduction factors allowing for damage was considered promising, with slight differences for average and median curves. Contrary to the literature, model parameter α was not a material constant, as it varied according to the material condition and the shape of the load vs. strain curve.
Constitutive models and statistical analysis of the short-term tensile response of geosynthetics after damage
Graphical abstract Display Omitted
Highlights Abrasion damage changed the shape of load vs. strain curves of the geogrid and the geocomposite. Polynomial models fitted the ultimate tensile strength better than hyperbolic-based models. Hyperbolic-based models fitted the secant stiffness better than polynomial models. Model parameter α was not a constant, as it varied according to the condition of the material. Adjustment coefficients and reduction factors were usedto predict model parameters after damage.
Abstract The objective of this research was to analyse the tensile response of three geosynthetics, to apply constitutive equations, and propose values for model parameters to represent the nonlinear behaviour of these materials in the short-term, supported by statistical analysis. Data for specimens of a nonwoven geotextile, a woven geogrid and a reinforcement geocomposite previously submitted to mechanical damage, abrasion damage, and mechanical damage followed by abrasion damage were analysed. Nonlinear regressions of the experimental results were performed to fit the load vs. strain curves to constitutive equations. For each geosynthetic, the results of damaged specimens were statistically compared to those of the undamaged ones to observe the influence of the induced damage on the tensile behaviour of the material. Experimental results were statistically compared with those obtained by the constitutive models to verify if the tensile properties and the model parameters were properly estimated. For the geotextile, significant changes in tensile properties were noticed only after sequential mechanical damage and abrasion damage. For the geogrid and the reinforcement geocomposite, abrasion damage was predominant due to considerable changes in the tensile properties and the shape of the load vs. strain curves. In general, the polynomial models fitted the ultimate tensile strength slightly better, while the hyperbolic-based models presented better approximation of the secant stiffness. For hyperbolic-based models, estimating curves for damaged materials from model parameters of undamaged specimens by applying adjustment coefficients and reduction factors allowing for damage was considered promising, with slight differences for average and median curves. Contrary to the literature, model parameter α was not a material constant, as it varied according to the material condition and the shape of the load vs. strain curve.
Constitutive models and statistical analysis of the short-term tensile response of geosynthetics after damage
Lombardi, Giovani (Autor:in) / Paula, António Miguel (Autor:in) / Pinho-Lopes, Margarida (Autor:in)
29.11.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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