PSI - Issue 84
Marco Givonetti et al. / Procedia Structural Integrity 84 (2026) 65–72
67
the bilinear model with hardening to the steel bars; and the Menegotto-Pinto model for prestressing steel, Menegotto and Pinto (1973).
Fig. 1. Beam cross section of the existing bridge (on the left) and Fiber discretization of the beam cross section (on the right)
Table 1. Deck properties of the case studies Deck number Span[m] Width[m] beams [-]
Beam spacing m] Cross-beams Cross-beam spacing [m]
1
27.0
12.3
3
4.50
4
9.0
2
10.0
12.0
6
2.02
5
5.0
3
20.0
12.0
6
2.02
3
5.0
4
12.0
12.3
6
2.00
3
6.0
5
28.5
11.0
4
2.75
5
6.7
6
17.0
12.3
3
4.50
3
8.5
7
23.1
12.3
3
4.50
4
7.7
8
27.0
12.3
3
4.50
4
9.0
Table 2. Material properties of the case studies
Deck number
f cd [MPa]
Reb.f yd [MPa]
Reb. f ud [MPa]
Strands f yd [MPa]
Strands f ud [MPa]
χy [1/m]
M yd [kNm]
χ u [1/m]
M Rd [kNm]
1
23.9
331.7
500.0
1400.0
1550.0
0.0060 13900
0.0380 15641
2
27.6
438.0
503.7
-
-
0.0024 1860
0.0598 2100
3
27.3
438.0
503.7
-
-
0.0018 5400
0.0425 6210
4
11.3
426.0
489.9
-
-
0.0027 2171
0.0616 2543
5
23.8
373.9
430.0
1391.3
1600.0
0.0060 18780
0.0400 21258
6
15.9
377.8
434.5
-
-
0.0015 6750
0.0380 7952
7
15.9
377.8
434.5
1256.0
1444.4
0.0056 11040
0.0394 12699
8
15.9
377.8
434.5
1256.0
1444.4
0.0062 12360
0.0399 14175
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