PSI - Issue 25

Domenico Ammendolea et al. / Procedia Structural Integrity 25 (2020) 454–464 Domenico Ammendolea / Structural Integrity Procedia 00 (2019) 000–000

462

9

7

6

5

4

3

2

1

40 50 60 70 80 90 0

Fig. 5. Variability of the live load multiplier as a function of the hangers slope ( α C )

a )

100 b )

2,5

80

2,0

60

1,5

40

1,0

20

0,5

100 150 200 250 300 0

100 150 200 250 300

Fig. 6. Comparison between tied arch bridges with inclined and vertical arch ribs for several bridge span lengths ( L ). (a) Variability of the critical axial force of arch ribs and (b) the volume of the material involved in the wind bracing system ( V br )

required for the traditional scheme based on vertical arches for every value of L . In particular, the material saving increases exponentially with bridge span length increments.