Numerical Modeling of the Interaction of Subsoil and Reinforced Concrete Slab

Abstract:

The influence of the physically-nonlinear behavior of the structure and interaction between the upper structure and foundation are the aspects which influence the results of the subsoil-structure interaction analysis. The aim of the application of computational model is to determine the most apposite distribution of stress and deformation due the contact stress in the footing bottom. This contact stress is especially dependent to the load. It also depends on the subsoil stiffness, upper structure stiffness and foundation stiffness too. Numerical analyses of contact task were made with FEM. The test sample for the task was a reinforced concrete foundation slab model loaded during experimental loading test. The subsoil is heterogeneous. Its properties are different from the idealized behavior of the linear elastic isotropic homogeneous material. Application of inhomogeneous half-space allows better capture the subsoil behavior because of increasing modulus of deformability with increasing depth of subsoil model. Results of FEM analyses were also confronted with the values measured during the experiment.

• Periodical: Solid State Phenomena (Volume 249)
• Pages: 290-295
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.249.290
• Online since: April 2016
• Authors: Jana Vaskova*, Radim Čajka
• Keywords: 3D Finite Elements, FEM, Foundation Structure, Interaction Models, Soil-Structure Interaction

References

[1] Aboutalebi, M., Alani, A., Rizzuto, J., Beckett, D. (2014).

[2] Alani, A., Aboutalebi, M. (2012) Analysis of the subgrade stiffness effect on the behaviour of ground-supported concrete slabs. Structural Concrete. 2012, roč. 13, č. 2, s. 102-108. DOI: 10. 1002/suco. 201100043.

DOI: 10.1002/suco.201100043

[3] Beckett, D. (1989) Comparative tests on plain, fabric reinforced and steel fibre-reinforced concrete ground slabs, Concrete (London), Volume 24, No. 3. (1989).

DOI: 10.1016/0010-4361(90)90353-x

[4] Huang, X., Liang, X., Liang, M., Deng, M., Zhu, A., Xu, Y., Wang, X., Li, Y. (2013).

[5] Cajka, R., Krivy, V., Sekanina, D. (2011).

[6] Buchta, V., Mynarcik, P. (2014) Experimental testing of fiber concrete foundation slab model, 3rd International Conference on Civil Engineering and Transportation, ICCET 2013Applied Mechanics and Materials. Volume 501-504, pp.291-293, (2014).

DOI: 10.4028/www.scientific.net/amm.501-504.291

[7] Janulikova, M. (2014).

[8] Mynarcik, P. (2015) The Subsidence Analysis of Experimental Post-Tensioned Concrete Slab Model in the Course of the Static Load Test, Applied Mechanics and Materials, Vols 744-746, pp.1556-1559, (2015).

DOI: 10.4028/www.scientific.net/amm.744-746.1556

[9] Halvonik, J., Fillo, L. (2013) The Maximum Punching Shear Resistance of Flat Slabs, Procedia Engineering, Vol. 65, 2013, pp.376-381.

DOI: 10.1016/j.proeng.2013.09.058

[10] Cajka, R., Labudkova, J. (2013).

[11] Cajka, R., Labudkova, J. (2014) Dependence of deformation of a plate on the subsoil in relation to the parameters of the 3D model. International Journal of Mechanics, Volume 8, Pages 208-215, 2014, ISSN: 1998-4448.

[12] EN 1992-1-1: Eurocode 2: Design of concrete structures - Part 1-1: General rules - Part 1-1: General rules and rules for buildings, (2004).

DOI: 10.3403/03178016