Finite Element Analysis of Stress-Strain State of Reinforced Concrete Pile Foundation Structures of a Residential Building under Low Temperatures Impact

The behavior of a reinforced concrete pile foundation at exceeding of permissible sizes of temperature blocks under the conditions of low temperature and on permafrost soils is considered. Materials of the building inspection are presented; the formation of cracks in foundation structures is shown. Strength calculation of the reinforced concrete pile foundation with vented under-floor space under the action of low temperature was performed in Ansys software. The stress-strain state beyond the elastic work of the structure with due regard for reducing the rigidity of the structure is analyzed with the use of the Willam-Warnke mathematical model. Dependences of strength and elastic-plastic deformation properties on the temperature are taken into account. Results of the numerical simulation are in good compliance with the inspection data and showed that the crack formation in the structures of the basement floor was caused by temperature-humidity deformations of concrete and reinforcement. The negative influence of internal angles in the plans of basement floors in the areas of niches and ledges which are concentrators of stresses and promote the crack formation in the structures is revealed. It is established that temperature stresses evident in the piles, in the abutment zones and the zones between the piles. Some recommendations on designing foundation structures in areas with low temperature are made.

T.A. NAZAROV, Bachelor,
F.F. POSELSKY, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

M.K. Ammosov North-Eastern Federal University (58, Belinsky Street, Yakutsk, 677000, Russian Federation)

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