Abstract
The structural design of a foundation depends upon the internal stresses developed in it at various conditions of loading and support. This paper investigates the influence of flexural rigidity of the footing and shear strength of underlying soil on the internal stresses developed in the foundation, by carrying out a series of laboratory scale loading tests on model footings supported on granular soil. A flexible model footing is fabricated with GI sheet of dimension 100 × 50 × 2 mm. The flexural rigidity is increased by fixing stiffeners of 2 mm diameter steel rods. The shear strength of supporting granular soil is varied by mixing fly ash at various proportions. The load–settlement behavior and the increase in curvature of footing with applied stress for various cases are determined from laboratory scale load tests. Finite element analyses are carried out with the software PLAXIS 3D, and the results are compared with those obtained from laboratory scale load tests for validation. The internal stress in footing is determined analytically from the measured curvature in laboratory scale load tests and numerically from finite element analyses. It is observed from the results that the internal stress distribution in a foundation is considerably influenced by the flexural rigidity of the footing and shear strength of supporting soil.
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Sam, A., Arunima Anil, A., Kurian, S.A., Kabeer, S., Jayamohan, J., Pushpan, S. (2023). Influence of Flexural Rigidity of Footing and Shear Strength of Supporting Soil on Internal Stresses in Foundation. In: Muthukkumaran, K., Reddy, C.N.V.S., Joseph, A., Senthamilkumar, S. (eds) Foundation and Forensic Geotechnical Engineering . IGC 2021. Lecture Notes in Civil Engineering, vol 295. Springer, Singapore. https://doi.org/10.1007/978-981-19-6359-9_18
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DOI: https://doi.org/10.1007/978-981-19-6359-9_18
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