Abstract

In this paper, a sand deposit with liquefaction potential was simulated in FLAC using Finn constitutive model. Equivalent loads of 5, 10, 15 and 20-story buildings were applied to the deposit. As a cyclic loading, acceleration time history of Bam earthquake was used. To examine pore water pressure variations in the soil mass during the earthquake loading, parameter r_u (pore water pressure ration, which equals pore water pressure increment divided by the initial mean effective stress in the soil mass) was defined for the software by a Fish function. Static analyses show that by increasing the applied loading due to building construction, the values of effective and shear stress increase and it generally can be a factor to influence liquefaction potential. Furthermore, dynamic analyses show that there is a shallow longitudinal area beneath 15 and 20-story buildings in which liquefaction potential increases due to high confining effective stress.

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