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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 56
Edited by: B.H.V. Topping
Paper XI.6

Numerical Simulation for the Effect of Soil Defects on the Superstructure of Multi-Storey Frame Buildings

K.M. El Zahaby and T.T. Abdel-Fattah

Housing and Building Research Centre, Cairo, Egypt

Full Bibliographic Reference for this paper
K.M. El Zahaby, T.T. Abdel-Fattah, "Numerical Simulation for the Effect of Soil Defects on the Superstructure of Multi-Storey Frame Buildings", in B.H.V. Topping, (Editor), "Advances in Civil and Structural Engineering Computing for Practice", Civil-Comp Press, Edinburgh, UK, pp 429-436, 1998. doi:10.4203/ccp.56.11.6
This paper discusses simplified techniques simulating malfunctioning soil beneath multi-story-frame structures built on shallow foundations and its influence on the superstructure. Two main problems are studied, namely, the effect of the structure's tilting, and the loss of support due to the settlement of the soil in a specific zone underneath the foundation. The soil is represented by Winkler's model. The spring model has been used for simulating the soil beneath the strip footings. The model is further developed to represent a rigid isolated footing, together with the soil underlying it. The model is verified using an example problem. On the other hand, the structure is modelled using 3-D frame elements with adequate constraints to minimise the number of unknowns, whenever possible. The second order effects of the gravity loading are taken into consideration using iterative P-Delta analysis.

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