Centrifuge study on the response of surface foundations subjected to strike-slip faulting on dense sand
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Date
2022Type
- Conference Paper
ETH Bibliography
yes
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Abstract
The present paper presents the key outcomes of a centrifuge study on the response of surface foundations resting on dense sand and subjected to a propagating strike-slip fault rupture. With the aid of a specially designed three-section split-box container, a series of centrifuge model tests were performed to identify the key mechanisms that govern fault rupture-soil-foundation-structure interaction. Firstly, a free-field (without foundation) fault rupture propagation test was conducted and used as reference for the following four fault rupture-foundation interaction tests. In the latter, the location, surcharge load, aspect ratio and rigidity of a surface foundation positioned at the ground surface were varied. The centrifuge tests revealed the complex three-dimensional (3D) fault rupture pattern developing in dense sand when sheared and its surficial manifestation termed Riedel (R) shears. A surface foundation when intersected by an R shear exhibits primarily fault-parallel horizontal displacement and rotation with respect to the vertical axis, with the other 3D response components being less pronounced. The foundation kinematic constraint is shown to control the response, by altering the shear stresses at the soil-foundation interface and the soil underneath. Show more
Publication status
publishedEditor
Book title
10th International Conference on Physical Modelling in Geotechnics (ICPMG2022)Pages / Article No.
Publisher
Korean Geotechnical SocietyEvent
Subject
Centrifuge; Surface foundations; Strike-slip faulting; Riedel shears; Soi-structure interaction; Soil-structure interactionOrganisational unit
09569 - Anastasopoulos, Ioannis / Anastasopoulos, Ioannis
02607 - Institut für Geotechnik / Institute for Geotechnical Engineering
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ETH Bibliography
yes
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