CUED Publications database

Liquefaction induced displacement and rotation of structures with wide basements

Hughes, FE and Madabhushi, SPG (2019) Liquefaction induced displacement and rotation of structures with wide basements. Soil Dynamics and Earthquake Engineering, 120. pp. 75-84. ISSN 0267-7261

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Abstract

Earthquake induced liquefaction can cause structures with shallow foundations to experience large settlement and rotation, and can cause subsurface structures to uplift. The performance of structures with basements, which intuitively combine these two problems, is not understood. In this paper, data from three dynamic centrifuge tests on structures with wide basements are examined. The ratio of upward to downward vertical forces was varied, and a symmetric and asymmetric superstructure was tested. Digital image correlation was used to capture the soil displacements, providing novel insight into the co-seismic soil-structure interaction. The inclusion of wide basements was shown to reduce the overall settlement of structures by providing an increased uplift force during the liquefi ed period. For symmetric structures, symmetric soil displacements occurred around the basement during consecutive half-cycles of sinusoidal shaking, resulting in negligible accumulation of rotation. In contrast, significant rotation was accumulated for an asymmetric structure as a result of the P -delta effect due to the eccentric mass.

Item Type: Article
Uncontrolled Keywords: Earthquake Liquefaction Basement Displacement Rotation Centrifuge modelling
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Jan 2019 20:09
Last Modified: 24 Oct 2019 14:34
DOI: 10.1016/j.soildyn.2019.01.006