PSI - Issue 59

Serhii Filipchuk et al. / Procedia Structural Integrity 59 (2024) 588–594 Serhii Filipchuk / Structural Integrity Procedia 00 (2019) 000 – 000

592

5

The mathematical description of the diagram of the deformed state in PC Lear is taken as a piecewise linear function with the coordinates of the value  -  obtained on the basis of a test prism in a decrease of 28 days (Fig. 4). The format of filling in the table of characteristics of the nonlinear volumetric KE is shown in Fig. 5. Нелинейное загружение 1

Z

Y

X

Fig. 4. General deformed KE model of experimental plate.

Fig. 5. Parameters of the diagram of nonlinear deformation of a volume finite element in PC Lira.

Force impacts on a reinforced concrete slab are given in the form of an impulse impact taking into account the weight of the impacting part, the average value of the impulse force, the duration of action and the form of the impulse/impact (Table 1).

Table 1. Forms of impulse or impact 1 2

3

4

5

6

At the same time, the value of the impulse in the case of a direct impact can be determined by the formula

g m

(1)

I

(1 0 V k c +

),

=