Percorrer por autor "Valente, R."
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- Geosynthetics for sustainable cities: 3D models and mechanical damagePublication . Paiva, Lucas; Lopes, Margarida Pinho; Valente, R.; Paula, António MiguelGeosynthetics for sustainable cities: 3D models and mechanical damage.
- Geosynthetics for sustainable cities: 3D numerical models and mechanical damagePublication . Paiva, Lucas; Paula, António Miguel; Lopes, Margarida Pinho; Valente, R.Geotechnical works play a major role on the infrastructure development. Geosynthetics are the most efficient, cost-effective and environmentally- friendly solution to a variety of geotechnical structures (e.g., roadways, foundations, retaining walls). Thus, improving the design methods of geosynthetics can increase safety and reduce infrastructure costs (GDS goal 9).
- Geosynthetics for sustainable cities: 3D numerical models and mechanical damagePublication . Paiva, Lucas; Paula, António Miguel; Lopes, Margarida Pinho; Valente, R.Geotechnical works play a major role on the infrastructure development. Geosynthetics are the most efficient, cost-effective and environmentally- friendly solution to a variety of geotechnical structures (e.g., roadways, foundations, retaining walls). Thus, improving the design methods of geosynthetics can increase safety and reduce infrastructure costs (GDS goal 9).Verify if constitutive models and parameters replicate the response of real structures. Improve the existing models with nonlinear & time- dependent constitutive models
- Topology optimization of a junction in a biaxial geogrid under in-isolation tensile loadingPublication . Paiva, L.; Pinho-Lopes, Margarida; Valente, R.; Paula, António MiguelThe finite element method is a powerful tool that can be used to analyse problems including complex geometries and material properties. In this study, the generalpurpose finite element software ABAQUS was used to investigate the load-strain response of a biaxial geogrid under in-isolation tensile loading. A 3D model was developed, accounting for different thickness of geogrid elements and their nonlinear response. Then, TOSCA module was used to investigate an alternative design of a junction profile. The geogrid was submitted to uniaxial and biaxial tensile loading, simulating a wide-width tensile test and a biaxial wide-width tensile test. Validation was performed by comparing the numerical model with experimental data. Optimization results showed that it was possible to reduce the junction volume profile by 53% with a compromise of 3% in maximum bearing capacity.