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Shock and Vibration
Volume 2017 (2017), Article ID 9850915, 12 pages
https://doi.org/10.1155/2017/9850915
Research Article

Shake Table Study on the Effect of Mainshock-Aftershock Sequences on Structures with SFSI

Department of Civil and Environmental Engineering, The University of Auckland, 20 Symonds Street, Auckland, New Zealand

Correspondence should be addressed to Xiaoyang Qin; zn.ca.inudnalkcua@900niqx

Received 10 July 2017; Accepted 19 September 2017; Published 23 October 2017

Academic Editor: Ivo Caliò

Copyright © 2017 Xiaoyang Qin and Nawawi Chouw. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Observations from recent earthquakes have emphasised the need for a better understanding of the effects of structure-footing-soil interaction on the response of structures. In order to incorporate the influences of soil, a laminar box can be used to contain the soil during experiments. The laminar box simulates field boundary conditions by allowing the soil to shear during shake table tests. A holistic response of a structure and supporting soil can thus be obtained by placing a model structure on the surface of the soil in the laminar box. This work reveals the response of structure with SFSI under mainshock and aftershock earthquake sequences. A large (2 m by 2 m) laminar box, capable of simulating the behaviour of both dry and saturated soils, was constructed. A model structure was placed on dry sand in the laminar box. The setup was excited by a sequence of earthquake excitations. The first excitation was used to obtain the response of the model on sand under the mainshock of an earthquake. The second and third excitations represented the first and second aftershocks, respectively.