Numerical simulations of soil tests emulating ground behaviour beneath super-tall building foundations

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Publication Title
Numerical simulations of soil tests emulating ground behaviour beneath super-tall building foundations

Abstract
Recently, the number of super-tall buildings has been increasing in Japan. The soil beneath such buildings undergoes significant unloading in the excavation phase followed by significant loading during construction, with the latter exceeding 1000 kN/m2 in some cases. Therefore, it has become increasingly important to consider the confining pressure dependency of the soil when predicting rebound and settlement of the bearing ground during construction. In a previous study, the authors presented a new constitutive model for soil where both the confining pressure dependency and strain dependency are considered. The stress–strain relation was defined using hyperbolic function in the deviatoric stress–strain plane, and its applicability was shown through numerical analysis of soil tests of Toyoura sand. In this work, an improved constitutive model based on modified Ramberg-Osgood (RO) model is proposed. Using the improved model, a series of soil tests on three different undisturbed samples taken from the construction site of a super-tall building is numerically simulated. The improved model is able to replicate the stress–strain relationship with a reasonable degree of accuracy.
Authors
Y. Zhou; T. Kiriyama

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

A - New developments on structural design

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