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Geomechanics and Engineering Volume 17, Number 1, January20 2019 , pages 11-18 DOI: https://doi.org/10.12989/gae.2019.17.1.011 |
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Footing settlement formula based on multi-variable regression analyses |
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Murat Hamderi
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| Abstract | ||
| The formulas offered so far on the settlement of raft footings provide only a rough estimate of the actual settlement. One of the best ways to make an accurate estimation is to conduct 3-dimensional finite element analyses. However, the required procedure for these analyses is comparatively cumbersome and expensive and needs a bit more expertise. In order to address this issue, in this study, a raft footing settlement formula was developed based on ninety finite element model configurations. The formula was derived using multi-parameter exponential regression analyses. The settlement formula incorporates the dimensions and the elastic modulus of a rectangular raft, vertical uniform pressure and soil moduli and Poisson\'s ratios up to 5 layers. In addition to this, an equation was offered for the estimation of average deflection of the raft. The proposed formula was checked against 3 well-documented case studies. The formula that is derived from 3D finite element analyses is useful in optimising the raft properties. | ||
| Key Words | ||
| footing; raft formula; DIANA; settlement; PLAXIS 3D | ||
| Address | ||
| Murat Hamderi: Faculty of Engineering, Turkish-German University, Istanbul, Turkey | ||