Experimental studies on shear stiffness of soil under external loading conditions

Calculation of foundations using elastic models simplifies the calculation of loads and impacts on foundations. However, in some cases they can significantly distort the real deformations, foundation efforts and in some cases cause their damage. In practice, designing and calculating foundations using these models, there are cases of excessively high concentrations of bending moments and shear forces, which requires a high percentage of reinforcement in these nodes. Sometimes, for example, with distributed loads, with the real presence of such efforts, calculations performed on models with a bedding coefficient show, on the contrary, their absence. The type of the adopted model and the rigidity of the foundation structures have a significant impact on the calculated deflection of the beam. The value of the adopted values of the model parameters also has a great impact on the calculation results. Calculation models in the area of contact with the soil base, the reactive pressure of the foundation P (x) linearly depends on the coefficient of local soil compression C1 and the shear resistance of the soil C2.

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