PSI - Issue 62

Raffaella Romanello et al. / Procedia Structural Integrity 62 (2024) 990–997 G. Miceli, R. Romanello, S. Lorefice, S. Massacci. / Structural Integrity Procedia 00 (2019) 000–000

997

8

Fig. 8. Structural element profile sections – Example reinforcements (in blue)

14. Results, pre- and post-project All pre-project verifications were run on all sections of the various structural types and for all studded connections. For the unverified sections, post-project verifications were run following the design of the reinforcements. We give below a table of results for all sections of the various groups with maximum IR max, AO and highest percentage of elements present, leaving out singular cases:

STRUCTURAL ELEMENTS

ID

IR max AO

IR PO

STRUCTURAL ELEMENTS

ID

IR max AO

IR PO

Lower beams Upper beams Diagonals

LB UB D

1.196 2.302 3.906 1.076 2.519 1.140

0.913 0.828 0.862 0.861 0.900 0.936

Covering cross beams Railway deck stringer Road deck stringers Covering stringers Lower cross-bracings Upper cross-bracings

CCB RAS ROS

0.721 0.742 1.110 1.061 1.929 1.063

- -

0.905 0.623 0.886 0.831

Uprights

U

CS

Railway deck cross beams Road deck cross beams

RACB ROCB

LCB UCB

Note that the higher IR indices are due to buckling of the diagonals and horizontal out-of-plane loading, which were not considered in the design of the bridge at the time. References - D.M. 17 Gennaio 2018: Norme Tecniche per le Costruzioni 2018. - Circolare 21 gennaio 2019 n. 7/C.S.LL.PP.: Istruzioni per l’applicazione delle "Norme Tecniche per le Costruzioni" di cui al D.M. 17/01/2018. - CNR-DT 207/2008: Istruzioni per la valutazione delle azioni e degli effetti del vento sulle costruzioni. - RFI DTC SI PS MA IFS 001 E: "Manuale di progettazione delle opere civili - parte II – sezione 2 - Ponti e strutture" del 31/12/2020 . - Pipinato, A., Pellegrino (2018): Extending the lifetime of steel truss bridges by cost-efficient strengthening interventions. Structure and Infrastructure Engineering . - Pipinato, A., Pellegrino, C., & Modena, C. (2012): Assessment procedure and rehabilitation criteria for the riveted railway Adige Bridge. Structure and Infrastructure Engineering.