Issue 39

P. Král et alii, Frattura ed Integrità Strutturale, 39 (2017) 38-46; DOI: 10.3221/IGF-ESIS.39.05

 , 0, 2, 2 , 1, 2, 3, 1 T PR SIGF A A A F B P P BU  red X  ,

(5)

The design vector reduction was then utilized during the optimization process as it shortens the computational time and saves the hard disk space without significantly affecting the achievement of the desired results. The reduced design vector X red already included only the 9 parameters having a marked impact on the numerical simulation results. The values of the pre-optimized material parameters and objective function ( LSM ) obtained from the best random realization generated within the sensitivity analysis are presented in Tab. 2.

No.

Parameter

Unit

Sensitivity analysis

Evolutionary Algorithm

1 2 3 4 5 6 7 8 9

[Mg/mm 3 ]

RO PR

2.468  10 -9

2.400  10 -9

[-]

0.1632 3.4787 13.2501

0.1677 3.2092 13.9527

[MPa] [MPa]

SIGF

A 0 A 2

[MPa -1 ]

1.755  10 -3

1.846  10 -3

A 0 Y A 2 Y A 2 F

[MPa]

10.613

10.130

[MPa -1 ] [MPa -1 ]

5.568  10 -3 2.715  10 -3 1.5425 23.1475 49.659 80.662 170.923 232.417 372.124 527.117 3362.560 4812.750 16147.867 15205.699 16277.413 19149.825 20935.411 24486.102 28990.083 32188.319 65782.085 81950.750 10312.759

5.670  10 -3 2.820  10 -3 1.4752 22.7979 49.170 93.030 176.750 266.590 378.220 578.620 3378.180 5166.940 18220.000 17719.000 17967.000 18871.000 22450.000 26047.000 29627.000 32338.000 72755.000 88596.000

B 1 P 2 P 3 P 4 P 5 P 6 P 7 P 8 P 9

[-]

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

[MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [MPa] [kN 2 ]

P 10 BU 1 BU 2 BU 3 BU 4 BU 5 BU 6 BU 7 BU 8 BU 9

BU 10

- 6601.210 Table 2 : The resulting identified material parameter values of the K & C Concrete model, obtained from the inverse analysis. LSM

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