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Dr. Taha Awad Allah El-Sayed Ibrahim :: Publications:

Title:
EFFECT OF STRUCTURE STIFFNESS ON STRESSES DISTRIBUTION UNDER THE FOUNDATION
Authors: N R El-Sakhawy , M E El Kilany , T A El-SAYED , A I El-Dosoky
Year: 2017
Keywords: Stresses distribution, modulus of sub grade reaction "Ks", structural analysis, SAP2000, foundation analysis, beam depth and slab thickness.
Journal: International Conference on Advances in Structural and Geotechnical Engineering
Volume: Not Available
Issue: Not Available
Pages: 1-14
Publisher: ICASGE’17
Local/International: International
Paper Link:
Full paper TAHA AWAD ALLAH EL-SAYED IBRAHIM_Paper_12.pdf
Supplementary materials Not Available
Abstract:

Foundation response is a complex interaction of the foundation itself, the superstructure, and the soil. That interaction may continue for a long time until final equilibrium is established between the superimposed loads and the supporting soil reactions. In many projects, designers of superstructure simulate soil as springs with subgrade reaction which mean that soil is one layer with liner reaction. This simulation neglects settlement of soil, types and properties of soil layers, underground water table and surrounded structures. The same happened in preparing the soil investigation and the soil report for any project which take only the loads transferred from the structure or assumed uniform distribution and do not take into consideration the effect of structure elements stiffness. This paper presents a study to evaluate the effect of various factors on the stresses distribution under the foundation and on columns loads such as Soil type (modulus of subgrade reaction), Footing depth, Superstructure stiffness (slabs thickness-beams depth) and Number of stories. Numerical analyses were carried out in more than 300 model adapting three dimensional finite element software program (SAP2000 version 16). The study concluded that the columns loads can be redistributed by controlling the relative stiffness between columns – slabs, columns – beams and columns – raft to achieve uniform stresses distribution under the foundation.

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