Figure 1:
Crack in the weld between the longitudinal stiffener and the deck plate (left); original fabrication drawing of the same detail (right)
Figure 2:
Numerical model of the orthotropic deck segment of the SNP Bridge
Table 1:
Estimated loading and vehicle frequency (for the year 2020; image source: imhd.sk)
| Visualisation of the busses | Bus type | Number of vehicles per year in one direction | Estimated loading Surface load Front -> Back |
|---|---|---|---|
| Mercedes-Benz CapaCity | 59 072 | 143.8 kN/m2 |
| 100.2 kN/m2 | |||
| 115.6 kN/m2 | |||
| 115.6 kN/m2 | |||
 | Iveco Urbanway 12M | 84 765 | 158.1 kN/m2 |
| 154.2 kN/m2 | |||
 | SOR NB18 | 160 850 | 143.8 kN/m2 |
| 115.6 kN/m2 | |||
| 154.2 kN/m2 |
Figure 3:
Load placement on the bridge deck
Figure 4:
Iveco Urbanway, Passage with eccentricity +150 mm (PD), Nominal stresses in the weld of the longitudinal stiffener at mid-span (OUT – on the outer web surface, IN – on the inner web surface, N – only from axial force)
Table 2:
Stress range magnitudes and number of cycles to failure at position PD (eccentricity +150 mm) from the Iveco Urbanway bus
| Stress range [MPa] | Number of cycles to failure |
|---|---|
| 33.37 | 8 205 608 |
| 19.96 | ∞ |
| 1.66 | ∞ |
Figure 5:
Detail of the weld connection between the bridge deck plate (12 mm) and the stiffener plate (6 mm) according to detail category C2b in FprCEN/TS 1993-1-901:2025
Figure 6:
Iveco Urbanway, passage with eccentricity +150 mm (PD), Hot-spot stresses in the web of the longitudinal stiffener at mid-span
Table 3:
Stress range magnitudes and number of cycles to failure at position PD (eccentricity +150 mm) from the Iveco Urbanway bus
| Stress range [MPa] | Number of cycles to failure |
|---|---|
| 98.02 | 1 880 473 |
| 95.28 | 1 185 100 |
| 5.24 | ∞ |
Figure 7:
Detail of the connection between the longitudinal stiffener and bridge deck plate with an initiated notch
Figure 8:
Iveco Urbanway, passage with eccentricity +150 mm (PD), Notch stresses in the web of the longitudinal stiffener at mid-span