Many transportation infrastructures all around the world are facing new challenges in terms of ageing and loss performance. The infrastructural asset managers required to perform scrupulous control health condition over time execute maintenance works. In this context, digital twin models should have a key role simplify speed up procedures for proper maintenance. This paper discusses advantages developing management infrastructures, with focus on bridges. particular, dynamic tests performed...

Modal shapes derived from Operational Analysis (OMA) lack normalization with respect to masses, hindering direct estimation of effective mass or modal participation factors. The mass-change method is suitable solve this issue since it proposes an experimental derivation scaling factors for modes based on OMA results in different load conditions. However, the case bridges, application challenging, as significant static masses are required deck loaded To address challenge, trucks can be used...

The optimal sensor placement is a critical aspect in the structural health monitoring of structures, as number and layout sensors directly impact quality usefulness collected data. When developing system, it paramount importance to use minimum gain maximum amount information. However, case limited sensors, their location on structure becomes crucial. This study aims assess potential several methods for development cost-efficient well-dimensioned dynamic systems be implemented wide range...

This paper presents the results and interpretations of static dynamic tests that were executed on a newly built cable-stayed steel-concrete composite bridge during final proof testing. A brief description structure, testing methodology, used instrumentation are presented. Then, test widely discussed interpreted in order to evaluate performance also understand usefulness each performed framework. All collected experimental data compared numerical ones obtained through refined finite element...

Vibrations are an issue of increasing importance in current footbridge design practice. More sophisticated footbridges with spans and more effective construction materials result lightweight structures a high ratio live load to dead load. As this trend, many have become susceptible vibrations when subjected dynamic loads. The most common loads on footbridges, other than wind loading, pedestrian-induced footfall forces due the movement people. This paper concerns experimental numerical...

Europe faces many problems connected to ageing infrastructure which was built in the second half of 20th century. Bridges are one crucial elements these infrastructures. In recent years, European countries have witnessed failures bridges across continent. For example, collapse Viadotto Polcevera Genoa caught attention society regarding its tragic consequences. Therefore, engineers must deal with assessment existing is essential for proper decision-making. Condition rating systems vary from...

Abstract Ambient vibration tests and operational modal analysis are commonly adopted worldwide to identify the dynamic behaviour of structures because they offer several advantages such as use portable light equipment, possibility be performed without interruptions structure serviceability, ambient noise globally excite construction. also usually in structural health monitoring systems control changes over time. In this paper identification two multi‐span simply supported prestressed RC deck...

Taking into account the long-term behavior of concrete, a model for analyzing shear-lag effect in composite beams with flexible shear connection is proposed. By assuming slab loss planarity described by fixed warping function, linear kinematics beam expressed means four unknown functions: vertical displacement whole cross section; axial displacements concrete and steel beam; intensity (shear-lag function). A variational balance condition imposed virtual work theorem three-dimensional bodies,...

This paper analyses the observational damage from post-earthquake investigations carried out on churches of Marche Region struck by 2016 Central Italy seismic sequence. Such activity seriously damaged many historical buildings and particularly churches, due to their intrinsic inability develop an efficient box-like resisting mechanism. After mainshocks, teams structural engineers were involved in assessment evaluation usability. Collected data are processed this work give insight into...

The seismic assessment of existing bridges is the utmost importance to characterise main structural deficiencies, estimate risk, prioritise retrofit interventions, or losses and repair costs in case earthquakes. above tasks require information on damage mechanisms likely occur as well extent over structure. Such types are generally not provided by classical fragility analysis, which mainly focused evaluation global performance bridge. In this paper, a systematic probabilistic methodology for...

Masonry buildings constitute a great Italian historical and cultural heritage, but they were also severely damaged by earthquakes over the centuries. Therefore, to assess their structural seismic performance, it is crucial gain refined trustworthy numerical model adopting updating techniques, sometimes based on artificial intelligence algorithms. This article deals with development of finite element an church that account for presence both damage securing systems. The performed particle...

In 2022, the Italian Government introduced innovative regulations for evaluating and monitoring existing bridges viaducts, tackling issues related to risk classification, safety assessment, monitoring. These employ a multilevel approach bridge inspections, assessments procedures. The guidelines have garnered international acclaim their forward-thinking approach. This paper proposes comprehensive study concerning whole process proposed in new guidelines, using case constituted by two...

This study explores the transverse response of bridge piers in riverbeds under a multi-hazard scenario, involving seismic actions and scoured foundations. The combined impact scour on foundations’ stability dynamic stiffness soil–foundation systems makes bridges more susceptible to earthquake damage. While previous research has extensively investigated this issue for founded piles, work addresses less explored but critical scenario shallow foundations, typical existing bridges. A...

This paper describes three novel displacement-based formulations for the analysis of composite beams with a flexible connection which is capable deforming along longitudinal axis member as well vertically, i.e. transverse to interface connection. For completeness, analytical model forms basis proposed modelling technique presented in both its weak and strong forms. The finite element are derived tested using different structural systems; their nodal freedoms include vertical axial...