PSI - Issue 72

G. Gusev et al. / Procedia Structural Integrity 72 (2025) 458–463

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Fig. 1. Dependence of elastic modulus of frozen soils on the value of negative temperature at pressure 0.2 MPa. 1 - sand; 2 - dusty loam; 3 - clay.

The modeling objects are typical residential buildings presented in Figure 2. The structures are 4-storey sectional brick residential buildings. One of the houses includes two 4-storey sections with technical floors, separated by a expansion joint. The building frame is formed by load-bearing brick walls, united in a common system with prefabricated reinforced concrete floor slabs made of multi-cavity slabs. The project provides for the construction foundations in the form of a pile field united by monolithic reinforced concrete high footings. The building sections are 600 mm apart in height.

Fig. 2. Fini te element model of the system “group of buildings (1) - soil base with different moduli of elasticity (2,3)”. Line 4 - boundary of permafrost soils in the foundation.

The second house includes three 4-storey sections with technical floors separated by a expansion joint. The building frame is formed by load-bearing brick walls united in a common system with prefabricated reinforced concrete floor slabs made of multi-cavity slabs. The project also provides for the construction foundations in the form of a pile field united by monolithic reinforced concrete footings. The neighboring sections of the building are 500 mm and 600 mm apart in height. The pile foundations penetrate the thickness of non-frozen (2) alluvial soils, which thaw seasonally and rest on permafrost soil - 3 (Figure 1). It will be assumed that until the ground temperature reaches 0 g Celsius, the elastic modulus of the ground will be reduced to 0 g. Celsius, the ground elastic modulus E in the model (in the permafrost zone - Figure 1 (3)) corresponds to the values of sand - line 1 in Figure 1. Further, when the temperature reaches higher than 0 g. Celsius at a given