Seismic response of displacing and non-displacing retaining systems: new insights
Abstract
This Thesis aims to clarify the Soil Retaining Wall Interaction (Chapter 1) by numerically and analytically examining the seismic response of: (a) Four different types of retaining walls, initially introduced in the centrifuge experiments of Sitar and co-workers; and (b) Three simple gravity wall formats of 12 m and 6 m height, which retain horizontal backfill sand soil. The numerical analyses performed here utilize the Simplified Constitutive (Si Co) plastic model of Anastasopoulos et al. (2011), as described in Chapter 2. The dynamic performance of this soil model is verified numerically against the centrifuge experimental results of Mikola & Sitar (2013) and Wagner & Sitar (2016a), as depicted in the same chapter. An extensive numerical parametric study on gravity walls subjected to seismic excitation is presented, exploring the role of parameters such as: the peak acceleration of the Gabor motion [PGA = 0.2 g, 0.4 g, 0.6 g] in Chapter 4,the period of the Gabor motion [TP = 0.25 s, ...
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