A Study on the liquefaction risk in seismic design of foundations

Article


Ardeshiri-Lajimi, Saeid, Yazdani, Mahmoud and Assadi Langroudi, A. 2016. A Study on the liquefaction risk in seismic design of foundations. Geomechanics and Engineering. 11 (6), pp. 805-820.
AuthorsArdeshiri-Lajimi, Saeid, Yazdani, Mahmoud and Assadi Langroudi, A.
Abstract

A fully coupled non-linear effective stress response finite difference (FD) model is built to survey the counter-intuitive recent findings on the reliance of pore water pressure ratio on foundation contact pressure. Two alternative design scenarios for a benchmark problem are explored and contrasted in the light of construction emission rates using the EFFC-DFI methodology. A strain-hardening effective stress plasticity model is adopted to simulate the dynamic loading. A combination of input motions, contact pressure, initial vertical total pressure and distance to foundation centreline are employed, as model variables, to further investigate the control of permanent and variable actions on the residual pore pressure ratio. The model is verified against the Ghosh and Madabhushi high acceleration field test database. The outputs of this work is aimed to improve the current computer-aided seismic foundation design that relies on ground’s packing state and consistency. The results confirm that on seismic excitation of shallow foundations, the likelihood of effective stress loss is greater in deeper depths and across free field. For the benchmark problem, adopting a shallow foundation system instead of piled foundation benefitted in a 75% less emission rate, a marked proportion of which is owed to reduced materials and haulage carbon cost.

JournalGeomechanics and Engineering
Journal citation11 (6), pp. 805-820
ISSN2005-307X
2092-6219
Year2016
PublisherTechno-Press
Accepted author manuscript
Digital Object Identifier (DOI)doi:10.12989/gae.2016.11.6.805
Publication dates
Print21 Jul 2016
Publication process dates
Deposited13 Sep 2016
Accepted21 Jul 2016
Copyright information© 2016 Techno-Press
LicenseAll rights reserved (under embargo)
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