PSI - Issue 11

Massimiliano Lucchesi et al. / Procedia Structural Integrity 11 (2018) 177–184 M. Lucchesi, B. Pintucchi, N. Zani/ Structural Integrity Procedia 00 (2018) 000–000

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5. Results

5.1. Static analysis

Referring to the ULS, numerical convergence is not achieved even under the vertical loads corresponding to the structure’s current use, but only up to a scaled value equal to 80% of the overall loads. Hence, the safety requirements have not been meet, and the structure’s stability cannot be verified for the NTC code. Figs. 8 to 10 show some of the information provided by the analysis for the stated percentage of loads. Fig. 8 shows the mesh used in the deformed shape (deformations are amplified 200 times).

(a)

(b)

Fig. 8. View of the deformed mesh: (a) frontal view (b) 3D view.

Figs. 9a) and b) show a plane view of the contour map of the principal compressive stress occurring on the extrados of the lower and the upper vaults, respectively.

a)

b)

c) Fig. 9. Principal compressive stress: (a) lower vaults (b) upper vaults (c) on the average surface of the whole structure.