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Geomechanics and Engineering Volume 11, Number 6, December 2016 , pages 805-820 DOI: https://doi.org/10.12989/gae.2016.11.6.805 |
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A study on the liquefaction risk in seismic design of foundations |
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Saeid Ardeshiri-Lajimi, Mahmoud Yazdani and Arya Assadi-Langroudi
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| 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 are aimed to improve the current computer-aided seismic foundation design that relies on ground | ||
| Key Words | ||
| liquefaction; dynamic; finite difference; effective stress; surcharge; non-linear; carbon | ||
| Address | ||
| (1) Saeid Ardeshiri-Lajimi, Mahmoud Yazdani: School of Civil and Environmental Engineering, Tarbiat Modares University, Iran; (2) Arya Assadi-Langroudi: School of Architecture, Computing and Engineering, University of East London, England, UK. | ||