Efficiency of Nearly Periodic Structures for Mitigation of Ground Vibration

Andersen, Lars Vabbersgaard; Peplow, Andrew; Bucinskas, Paulius

doi:10.7712/120117.5439.18112

Cited by 2 publications

(1 citation statement)

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“…More relevant for the present problem of ground vibration, Persson et al [12] studied the effect of having repeated hills and/or valleys, and Andersen [13] analysed the effect of linear arrays of rigid blocks embedded in the ground using a two-dimensional model of a periodic structure. This work was extended to three-dimensional analysis of nearly-periodic structures [14,15,16]. Furthermore, Peplow et al [17,18] established simplified modelling approach to analysis of linear arrays of blocks placed on the ground surface.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Ground Vibrations by Circular Arrays of Rigid Blocks

Andersen¹,

Peplow²,

Persson³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Pile driving and other activities in the built environment cause ground vibration at low frequencies. This may result in annoyance to people as well as damage to civil structures. It is known that masses added on the ground surface can have an impact on the vibration levels in the surrounding environment. Hence, employing a semi-analytical model for rigid blocks on the surface of a layered ground, this paper investigates whether circular arrays of such blocks can be used as a means of vibration mitigation. The frequency range 0-80 Hz is considered, since this is relevant to whole-body vibrations of humans as well as the fundamental modes of resonance in building elements, e.g., floors and walls. Two different soil profiles are analysed: a soft dry sand layer over a till half-space and a soft wet clay layer over a lime half-space. Further, three configurations of the block arrays are taken into consideration, and for the first soil profile also the height of the blocks is varied to test its influence on the insertion loss in a zone 20-40 m away from the source. The aim is to quantify the overall insertion loss that can be expected using the proposed methodology. Further, the variation in insertion loss caused by changes in the block array configuration is examined.

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