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3 results on '"Davide Messina"'

1. Experimental Application of the Italian Bridge Guidelines to a Stock of Prestressed Concrete Bridges

Author

Andrea Floridia, Davide Messina, Dario Panarelli, Antonino Recupero, Pier Paolo Rossi, and Nino Spinella

Subjects
bridges, viaducts, prestressed concrete girders, bridge guidelines, level of defectiveness, case studies, Technology
Abstract

This study applies the first three levels of analysis outlined in the recent Italian Bridge Guidelines to a stock of prestressed concrete bridges located along the highways connecting the cities of Palermo, Messina and Catania in Sicily, south of Italy. The examined levels of analysis include census, visual inspection and determination of the structural–foundational and seismic Classes of Attention of bridges and viaducts. Data of the census and visual inspection activities were gathered using a custom-made web application. The details, the methodologies and all the features implemented in the web platform were illustrated and discussed. Furthermore, the collected data were described and critically analyzed, offering insights into the strength and limitations of each of the three examined levels of analysis of the Italian Bridge Guidelines. Finally, based on the detected defects and their numerousness with respect to the total number of assessed bridges, the authors proposed a straightforward and practical methodology for prioritizing any subsequent repairing intervention on specific groups of bridges.

Published
2024
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2. Quality control and safety assessment of prestressed concrete bridge decks through combined field tests and numerical simulation

Author

Dario De Domenico, Davide Messina, and Antonino Recupero

Subjects
Quality control, Building and Construction, Bridges, Global safety factor, Viaducts, Safety assessment, Architecture, Load-bearing capacity, Nonlinear analysis, Partial factor method, Prestressed concrete bridge decks, Push-down curves, Safety, Risk, Reliability and Quality, Civil and Structural Engineering
Published
2022
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3. A Combined Experimental-Numerical Framework for Assessing the Load-Bearing Capacity of Existing PC Bridge Decks Accounting for Corrosion of Prestressing Strands

Author

Antonino Recupero, Dario De Domenico, and Davide Messina

Subjects
Technology, Serviceability (structure), Computer science, Bridge (nautical), Article, law.invention, nonlinear static analysis, operational modal analysis, Prestressed concrete, bridges, law, Girder, General Materials Science, Concrete degradation, Microscopy, QC120-168.85, corrosion, structural health monitoring, business.industry, prestressed concrete bridge decks, dynamic identification, corroded strands, structural vulnerability assessment, QH201-278.5, Structural engineering, Engineering (General). Civil engineering (General), Finite element method, TK1-9971, Operational Modal Analysis, Descriptive and experimental mechanics, Electrical engineering. Electronics. Nuclear engineering, Structural health monitoring, TA1-2040, business
Abstract

Bridges constitute important elements of the transportation network. A vast part of the Italian existing infrastructural system dates to around 60 years ago, which implies that the related bridge structures were constructed according to past design guidelines and underwent a probable state of material deterioration (e.g., steel corrosion, concrete degradation), especially in those cases in which proper maintenance plans have not been periodically performed over the structural lifetime. Consequently, elaborating rapid yet effective safety assessment strategies for existing bridge structures represents a topical research line. This contribution presents a systematic experimental-numerical approach for assessing the load-bearing capacity of existing prestressed concrete (PC) bridge decks. This methodology is applied to the Longano PC viaduct (southern Italy) as a case study. Initially, natural frequencies and mode shapes of the bridge deck are experimentally identified from vibration data collected in situ through Operational Modal Analysis (OMA), based on which a numerical finite element (FE) model is developed and calibrated. In situ static load tests are then carried out to investigate the static deflections under maximum allowed serviceability loads, which are compared to values provided by the FE model for further validation. Since prestressing strands appear corroded in some portions of the main girders, numerical static nonlinear analysis with a concentrated plasticity approach is finally conducted to quantify the effects of various corrosion scenarios on the resulting load-bearing capacity of the bridge at ultimate limit states. The proposed methodology, encompassing both serviceability and ultimate conditions, can be used to identify critical parts of a large infrastructure network prior to performing widespread and expensive material test campaigns, to gain preliminary insight on the structural health of existing bridges and to plan a priority list of possible repairing actions in a reasonable, safe, and costly effective manner.

Published
2021

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