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\i Long-term Behaviour of Railway Transitions under Dynamic Loading\i0 . Eds. Manuel A. G. Silva, and Paul H\'f6lscher. Universidade Nova de Lisboa. Lisbon, 2013.\par \par \i Modelling dynamic superficial excitation of subsoil (in Portuguese)\i0 . Eds. Bil\'e9 J. P. Serra. Instituto Superior T\'e9cnico da Universidade T\'e9cnica de Lisboa. Lisbon, 2005.\par \par Varandas, J. N., and J. P. Bil\'e9 Serra \i Relat\'f3rio 151/97 - NF, Equipamento para realiza\'e7\'e3o dos ensaios segundo as normas ASTM D 4253-93 e D 4254-91\i0 . Lisbon: LNEC - Laborat\'f3rio Nacional de Engenharia Civil, 1997.\par \par Dimitrovov\'e1, Z., and J. N. Varandas. "Critical velocity of a load moving on a beam with a sudden change of foundation stiffness: Applications to high-speed trains." \i Computers & Structures\i0 . 87 (2009): 1224-1232.\par \par Varandas, J. N., P. H\'f6lscher, and M. A. G. Silva. "Dynamic behaviour of railway tracks on transitions zones." \i Computers & Structures\i0 . 89 (2011): 1468-1479.\par \par Varandas, J. N., A. Paix\'e3o, E. Fortunato, P. H\'f6lscher, and R. Cal\'e7ada. "Numerical Modelling of Railway Bridge Approaches: Influence of Soil Non-Linearity." \i International Journal of Railway Technology\i0 . 3.4 (2014): 73-95.\par \par Varandas, J. N., P. H\'f6lscher, and M. A. G. Silva. "Settlement of Ballasted Track Under Traffic Loading. Application to Transition Zones." \i Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit\i0 . 228.3 (2014): 242-259 .\par \par Varandas, J. N., A. Paix\'e3o, and E. Fortunato. "A study on the dynamic train-track interaction over cut-fill transitions on buried culverts." \i Computers & Structures\i0 . 189 (2017): 49-61.\par \par Varandas, J. N., P. Holscher, and M. A. G. Silva. "Three-dimensional track-ballast interaction model for the study of a culvert transition." \i Soil Dynamics and Earthquake Engineering\i0 . 89 (2016): 116-127.\par \par Bil\'e9 Serra, J. P., and J. N. Varandas. "Estimativa da Curva de Dispers\'e3o de Rayleigh por Sobreposi\'e7\'e3o Modal." \i Congreso de M\'e9todos Num\'e9ricos en Ingenieria \i0 . Granada, Spain 2005. \par \par Dimitrovov\'e1, Z., J. N. Varandas, and M. A. G. Silva. "Ground Vibrations Induced by High-Speed Trains in Regions with Sudden Foundation Stiffness Change." \i Proceedings of the 11th International Conference on Civil, Structural and Environmental Engineering Computing\i0 . St. Julians, Malta 2007. \par \par Varandas, J. N., R. Silva, M. A. G. Silva, N. Lopes, and P. H\'f6lscher. "The Impact of Rail Corrugation on the Degradation of Ballast." \i Proceedings of the First International Conference on Railway Technology: Research, Development and Maintenance\i0 . Ed. J. Pombo. Las Palmas de Gran Canaria, Spain: Civil-Comp Press,  2012. 543-546.\par \par Varandas, J. N., and J. P. Bil\'e9 Serra. "Modela\'e7\'e3o da excita\'e7\'e3o superficial do terreno e sua utiliza\'e7\'e3o na estimativa de perfis de m\'f3dulos de corte atrav\'e9s da an\'e1lise espectral de ondas de superf\'edcie." \i 6\'ba Congresso Nacional de Sismologia e Engenharia S\'edsmica\i0 . Guimar\'e3es, Portugal 2004. \par \par Varandas, J. N., A. Paix\'e3o, E. Fortunato, P. Holscher, and R. Cal\'e7ada. "Non-linear Elastic Behaviour of Unbound Aggregates in FEM representing Railway Transition Zones." \i Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance\i0 . Ajaccio, France: Civil-Comp Press,  2014. \par \par Dimitrovov\'e1, Z., J. N. Varandas, J. R. Almeida, and M. A. G. Silva. "Sensitivity Analysis of Track Vibrations due to Vertical Stiffness Variation in High-Speed Railways." \i Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN\i0 . Rethymno, Crete 2007. \par \par Varandas, J. N., P. H\'f6lscher, and M. A. G. Silva. "A Settlement Model for Ballast at Transition Zones." \i Proceedings of the Tenth International Conference on Engineering Computational Technology\i0 . Eds. B. H. V. Topping, J. M. Adam, F. J. Pallar\'e9s, R. Bru, and M. L. Romero. Valencia, Spain: Civil-Comp Press,  2010. \par \par }