A finite-element model combining the frequency domain thin-layer method with paraxial boundary conditions to simulate the semi-infinite extent of a soil medium is presented in this paper. The combined numerical model is used to deal with harmonic vibrations of surface rigid foundations on non-horizontal soil profiles. The model can deal with soil media over rigid bedrock or significant depths of half-space. Structured finite elements are used to mesh simple geometry soil domains, whereas unstructured triangular mesh grids are employed to deal with complex geometry problems. Dynamic responses of homogeneous as well as layered soil profiles are simulated and validated against analytical and approximate solutions. Finally, the model is used to deal with surface ground vibration reduction, in which it is first validated against published results and then followed by an example involving a bridge.
|Number of pages||11|
|Journal||Proceedings of the Institution of Civil Engineers: Geotechnical Engineering|
|Early online date||26 Apr 2016|
|Publication status||Published - Oct 2016|
Hamdan, N., Laghrouche, O., Connolly, D., & Woodward, P. K. (2016). Modelling ground vibrations induced by harmonic loads. Proceedings of the Institution of Civil Engineers: Geotechnical Engineering, 169(5), 399-409. https://doi.org/10.1680/jgeen.15.00070