Structural dynamics and earthquake engineering paper
Tsang, H-H, Xu, B-Q, Wilson, JL, Lo, SH 2014, 'Effects of boundary conditions on modelling ground vibrations induced by high-speed train', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 937-942. ISBN: 9780994152008.
High-speed trains generate significant vibrations in the ground, which could induce excessive responses in both buried and above-ground structures. However, accurate predictions of the characteristics of ground and structural responses to train-induced vibrations remain a major challenge. Essentially, the absorbing boundary condition has significant effects on the dynamic response behaviours of wave-soil-structure interaction in unbounded media. An in-house 2-D finite element model has been developed for time-domain simulation of stress wave propagation and dynamic responses of structures with the use of different boundary conditions. Convolutional perfectly matched layer (CPML) model has been shown as an effective absorbing boundary condition for modelling train-induced vibrations in a truncated domain.