Application of the new Italian assessment guidelines to a 1960s prestressed concrete road bridge

Fox, Matthew J.; Furinghetti, Marco; Pavese, Alberto

doi:10.1002/suco.202200884

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…Some common elements are present in the selected case study bridges. All considered bridges were built between 1960 and 1973, like most of the existing bridges in the country [27]. All the considered bridges are beam bridges.…”

Section: Characteristics Of the Case Studiesmentioning

confidence: 99%

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Numerical Assessment of the Seismic Vulnerability of Bridges within the Italian Road Network

Furinghetti,

Reale,

Fox

et al. 2023

Applied Sciences

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The safety of existing bridges represents a serious problem in Italy since these structures are fundamental for the national transportation system and, at the same time, can be subject to significant deterioration phenomena linked to the fact that the construction period typically dates back to the 1960s. This study involves the seismic analysis of five case study bridges belonging to the Italian Road Network. Using nonlinear time–history analysis with sets of code-spectrum compatible ground motions, analytical fragility curves have been constructed for each of the five bridges. The results obtained interpreting the analytical fragility curves agree with the fact that the seismic behavior of existing bridges can be problematic and that higher seismicity can be associated with more detrimental behavior. In particular, the results reveal that in regions with higher seismicity, the main problems in bridges are related to bearings and connecting elements located in the piers. Five case studies have also been analyzed to determine the Structural and Foundational Class of Attention and Seismic Class of Attention, following the approach proposed by the 2020 Italian Guidelines. In this way, it is possible to compare two different assessment approaches with different safety levels. The results obtained with the two approaches are in good agreement considering bridges in high seismicity regions, while the procedure of the Guidelines could lead to not reflecting the seismic behavior of bridges when the seismicity of the area is lower.

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Section: Characteristics Of the Case Studiesmentioning

confidence: 99%

“…Most of the existing Italian bridges have been built around 50-60 years ago [27], mainly using R.C. or prestressed concrete [53].…”

Section: Main Issues Of Existing Bridgesmentioning

confidence: 99%

Numerical Assessment of the Seismic Vulnerability of Bridges within the Italian Road Network

Furinghetti,

Reale,

Fox

et al. 2023

Applied Sciences

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“…The objective of this study was to provide a method to streamline the evaluation procedure for assessing the condition of existing bridges and make it available to managing entities. Additionally, a research study by Fox et al [12] critically analysed the guidelines to identify aspects that may require modification. This study was conducted during the experimental phase of the guidelines when they were applied to monitor the condition of existing bridges under the supervision of the High Council of Public Works.…”

Section: Introductionmentioning

confidence: 99%

Level 3 Assessment of Highway Girder Deck Bridges according to the Italian Guidelines: Influence of Transverse Load Distribution

Santarsiero,

Albanese,

Picciano

et al. 2023

Buildings

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The Italian Ministry of Infrastructure and Transportation adopted the guidelines on risk classification and management, safety assessment and monitoring of existing bridges through the Decree No. 578 dated 17 December 2020. This document must be used by all managing entities to prevent damage due to a lack of maintenance to these crucial components of the infrastructure system. The approach of the guidelines for existing bridges is developed across six levels, ranging from Level 0 to Level 5. The research work presented in this article is focused on Level 3, which pertains to preliminary assessments conducted on existing bridges. Through an automated procedure, the preliminary verification is performed by comparing bending and shear stress generated by traffic load schemes extracted from previous standards with the ones based on the current code. These loads are applied to a series of girder deck models, selected through a statistical study conducted on a database of bridges. Performance indices are derived from the comparison to evaluate the adequacy of previously designed and constructed structures by applying the load models specified in the current regulations for designing new bridges. The analysis results highlight a performance gap, which varies depending on the standard code at hand.

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“…Considering the case of the Italian road network, most of the bridges have been built around the middle of the last century and have reached or exceed their design life. The degradation in the properties of bridges has played a key role in some collapse events that occurred in recent years [4]. The rise in frequency of bridge collapses is a clear indicator of the effects of aging, with eventual lack of maintenance [5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Force Response of Bearing Devices for Bridge Structures

Furinghetti,

Reale,

Fox

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Bridge structural systems are often represented by high risk levels, from several standpoints. The strategic role they generally play in the infrastructure network leads to significant exposure characteristics, with a resulting high risk level. Even though the seismic action is not always a key issue for a considered bridge, excessive horizontal loading may lead to unexpected failures at specific local levels. Among all the possible structural elements, bearing devices can represent in some case the most vulnerable component of the overall system, which can cause sudden and brittle collapses, at ultimate conditions. In this work the behavior of bearing devices for bridge structural systems has been analyzed, by comparing the outcomes of experimental campaigns to numerical parameters, commonly adopted in analytical simulations. Then, some case study structures have been modeled, in order to carry out a parametric study, with varying mechanical properties, and consequently accounting for the effect of aging on the force response of the single devices. Special attention has been focused on the displacement at the bearing locations, rather than the internal forces of piers, and results have been normalized with respect to the mean values for the assumed mechanical properties.

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Application of the new Italian assessment guidelines to a 1960s prestressed concrete road bridge

Cited by 7 publications

References 9 publications

Numerical Assessment of the Seismic Vulnerability of Bridges within the Italian Road Network

Numerical Assessment of the Seismic Vulnerability of Bridges within the Italian Road Network

Level 3 Assessment of Highway Girder Deck Bridges according to the Italian Guidelines: Influence of Transverse Load Distribution

Analysis of the Force Response of Bearing Devices for Bridge Structures

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