Procedia Structural Integrity最新文献

{"title":"Solid finite-element modeling of prestressed beams. Part II: Concrete girder-bridge with a parabolic tendon","authors":"Marco Bonopera,&nbsp;Gianfranco De Matteis","doi":"10.1016/j.prostr.2026.06.060","DOIUrl":"10.1016/j.prostr.2026.06.060","url":null,"abstract":"<div><div>The shear deformation in prestressed concrete girder-bridges under long-age conditions was studied based on the Timoshenko theory. Their shear deformation in terms of second-order effects is usually neglected. In this second article, an additional high-fidelity solid finite-element model using the Strand7, assuming geometric nonlinearities and time-dependent post–tensioning losses, was developed to analyze such a topic. A simply supported concrete specimen composed of parabolic tendon, significant slenderness ratio and high-strength concrete was considered. Based on the comparison with static tests performed on such a member, the shear deformation should firmly be assumed for gaining proper accuracies in most structural analyses, even when the concrete girder-bridges have an important length/height ratio. Similar to the first article, the solid finite-element model was then used to determine the parameters of the magnification factor formula. Accordingly, the post–tensioning identification, based on the “static deflected shape” method, requires considering the shear effect. Finally, the compression-softening theory was confirmed for concrete girder-bridges under long-age conditions when cracking is excluded and the second-order shear effects are &lt; 10%.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 465-472"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy of X-Ray Diffraction as NDT technique for prestress force evaluation","authors":"Silvia Manarin,&nbsp;Flora Faleschini,&nbsp;Mariano Angelo Zanini,&nbsp;Carlo Pellegrino","doi":"10.1016/j.prostr.2026.06.031","DOIUrl":"10.1016/j.prostr.2026.06.031","url":null,"abstract":"<div><div>The assessment of residual prestressing force is of paramount importance for the structural safety assessment of existing post-tensioned concrete structures. In fact, the effective tension present within the prestressing reinforcement is vital for the sustained structural integrity and comprehensive functionality of prestressed concrete elements, particularly within critical infrastructure such as bridges, thereby ensuring their durability and safety under diverse loading conditions. Given the concealed and embedded configuration of prestressing tendons, they remain inaccessible through traditional direct measurement methodologies. Thus, a variety of non-destructive testing (NDT) techniques have been proposed in literature to carry direct or indirect measurements of current stress level in steel strands and wires. Notably, amongst these techniques, X-ray diffraction (XRD) has emerged as a promising tool for direct stress evaluation, notwithstanding the practical challenge inherent on-site applications. This work shows the results of a large experimental campaign, aimed at evaluating the accuracy of the method under laboratory conditions. This study utilized both single wires and seven-wire strands, which were consistently tensioned under controlled conditions. The current stress was measured with a load cell and estimated with XRD, varying the operating conditions. Results obtained from the diffractometer, when compared with known stress values, indicated adequate measurement repeatability and low discrepancy among the NDT-estimated and measured values.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 231-239"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Model-Based Learning for Multiple Bridge Monitoring in Transportation Networks: A Preliminary Study","authors":"Elisa Tomassini,&nbsp;Enrique García-Macías,&nbsp;Filippo Ubertini","doi":"10.1016/j.prostr.2026.06.038","DOIUrl":"10.1016/j.prostr.2026.06.038","url":null,"abstract":"<div><div>This work presents a novel approach to structural damage assessment designed to support network-level monitoring of bridges. The increasing deployment of permanent Structural Health Monitoring systems has led to a rapid growth in available data, offering new opportunities to develop algorithms that exploit the knowledge acquired from the analysis of real-world structures to enhance the condition assessment of other similar structures. In this context, the study introduces a model-based transfer learning methodology that enables knowledge sharing across a network of bridges by means of neural network-based surrogate models. Specifically, deep neural networks are employed to construct surrogate models, replacing traditional non-intrusive response surface models commonly used in the literature. The proposed approach allows a surrogate model trained on one bridge to be transferred and adapted to another with comparable characteristics, paving the way for typology-driven surrogate modeling. By embedding shared knowledge of damage mechanisms across structurally similar systems, the proposed framework facilitates scalable, data-informed, and model-aware monitoring strategies, contributing to more efficient infrastructure management at the network scale.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 288-295"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of seismic isolation in the retrofit of bridges in Italy","authors":"Federico Scafati,&nbsp;Chiara Ormando,&nbsp;Paolo Clemente,&nbsp;Giacomo Buffarini","doi":"10.1016/j.prostr.2026.06.004","DOIUrl":"10.1016/j.prostr.2026.06.004","url":null,"abstract":"<div><div>Seismic isolation is a suitable and consolidated technique to protect bridges against earthquakes, allowing to achieve a level of safety not possible with traditional systems. Seismic retrofitting can often be obtained by just replacing existing bearings with anti-seismic devices. In some cases, retrofitting of the vertical structures, piers, and abutments is also necessary, while deck replacement is often linked to concrete deterioration and the need to upgrade the roadway to new standards. This paper traces the development of seismic isolation in Italian bridges alongside the evolution of seismic hazard classification. Furthermore, it describes three bridges that represent typical cases in which isolation devices are installed in place of existing bearings. In the first case study high damping rubber bearings were inserted to seismically isolate a simple reinforced concrete deck. Contemporarily, a kinematic chain is realized between supported girders to improve the response to horizontal loads but keeping the static scheme unchanged for vertical loads. In the second one, double curved surface sliders were used for prestressed reinforced concrete girders and shock transmitters were introduced between adjacent spans in correspondence of the piers to connect them in seismic conditions. In the third example, new lead rubber bearings support a new continuous mixed steel-concrete deck. All bridges belong to the Italian highway network and are in high seismic areas characterized by significant peak ground accelerations. The interventions allow the structures to be conformed to current Italian standards. These are just a few examples to serve as a guide for future applications.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 25-32"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing Tunnel Asset Management through Multi-Objective Decision Support Tools","authors":"D. Di Fiore,&nbsp;L. Baccolini,&nbsp;A. Panebianco,&nbsp;A. De Marco,&nbsp;M. Mazzola,&nbsp;M. Conte","doi":"10.1016/j.prostr.2026.06.022","DOIUrl":"10.1016/j.prostr.2026.06.022","url":null,"abstract":"<div><div>The upcoming challenges in the transport infrastructures industry will surely include the maintenance and rehabilitation of the existing tunnels, furthermore, a structured and data-driven approach, aligned with best practices in Asset Management, is essential to ensure continued serviceability while operating within budgetary constraints. Autostrade per l’Italia S.p.A. manages 595 tunnels, half of which were built before 1970. In response to this scenario, the authors launched in 2023 the development of a decision support tool designed to assist in defining and optimizing tunnel maintenance strategies. The primary goal is to reduce subjectivity in the decision-making process and provide a robust, user-friendly platform that supports engineers and asset managers in planning interventions based on objective criteria. The first phase resulted in an internal prototype, that was tested through real business cases, enabling continuous refinement through feedback from daily operations.</div><div>In early 2024, the project entered its second phase with the development of four objective functions:<ul><li><span></span><span><div>1. Structural Condition (STR): current and forecasted tunnel integrity;</div></span></li><li><span></span><span><div>2. Economic Efficiency (NPV): net present value of expected benefits and costs;</div></span></li><li><span></span><span><div>3. Operational Impact (OP): implications for service continuity;</div></span></li><li><span></span><span><div>4. Sustainability (ESG): environmental, social, and governance performance.</div></span></li></ul></div><div>The tool allows for the optimization of the objective functions and the prioritization of assets that require action in the short- to medium-term, aligning with performance targets and service level agreements.</div><div>Although still under development, the initiative demonstrates a promising shift toward a more transparent, repeatable, and accountable approach to tunnel asset management. Ongoing work includes refining deterioration and cost models, enhancing ESG assessment criteria, and involving interdisciplinary experts to further strengthen the tool’s reliability and applicability across various contexts.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 159-166"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Evaluation of Prioritization Methods for Post-Tensioned Concrete Bridges According to CS 465","authors":"L. Zoccolini,&nbsp;C. Pettorruso,&nbsp;D. Rossi,&nbsp;E. Bruschi,&nbsp;V. Quaglini","doi":"10.1016/j.prostr.2026.06.023","DOIUrl":"10.1016/j.prostr.2026.06.023","url":null,"abstract":"<div><div>The assessment and management of existing post-tensioned concrete bridges remain a critical challenge in infrastructure maintenance. To address this issue, the British Standard CS465 introduces two systematic approaches to prioritize interventions based on the outcomes of risk review and assessment, namely the risk rating and mean hazard risk level score. Both methods aim to establish an objective hierarchy of urgency for remedial actions, yet they differ in formulation and sensitivity to input parameters.</div><div>This study aims to assess the robustness of the two methods by means of a practical application. A multi-span bridge comprising more than fifty spans and several hundred critical points is considered as a case study. By varying key input parameters such as the structural form, presence of vulnerable details, and structural condition, this article is meant to evaluate how either method responds to changes in risk profile. The risk rating method aggregates multiple weighted factors to yield a normalized score, while the mean hazard risk level score derives the evaluation from the average severity of identified hazards based on likelihood and consequence. The comparative analysis reveals that the risk rating approach offers a broader overview influenced by construction and contextual parameters, whereas the hazard score approach is more responsive to localized deterioration and inspection outcomes. The findings underscore the importance of method selection in resource allocation and maintenance planning.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 167-174"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Landslide-Bridge interaction risk assessment: MARIE research project","authors":"Antonio Fiorentino,&nbsp;Marco Barla,&nbsp;Lorenzo Brezzi,&nbsp;Monica Corti,&nbsp;Erica Cernuto,&nbsp;Francesca Dezi,&nbsp;Lorenzo Di Taranto,&nbsp;Angelo Doglioni,&nbsp;Fabio Gabrieli,&nbsp;Michele Gatto,&nbsp;Alessandra Insana,&nbsp;Arianna Lupattelli,&nbsp;Laura Longoni,&nbsp;Salvatore Misiano,&nbsp;Lorella Montrasio,&nbsp;Monica Papini,&nbsp;Nicola Perilli,&nbsp;Diana Salciarini,&nbsp;Nunziante Squeglia,&nbsp;Stefano Stacul,&nbsp;Paolo Simonini","doi":"10.1016/j.prostr.2026.06.097","DOIUrl":"10.1016/j.prostr.2026.06.097","url":null,"abstract":"<div><div>Following the 2018 collapse of the Morandi Bridge in Genoa, Italy, a national program was launched to identify factors that may compromise the safety and functionality of bridges. The Ministry of Infrastructure issued Guidelines for the control and supervision of road bridges and viaducts, promoting an interdisciplinary, multi-level risk assessment that covers structural, seismic, hydraulic and landslide hazards, from preliminary screening to detailed evaluation.</div><div>Since 2021, universities and research institutes grouped in the Consorzio Fabre have advanced research on landslide–bridge interaction. In this context, the MARIE project (Methodological Approaches for RIsk assessment in the framework of landslide-bridge IntEraction) unfolds through several phases, starting from case-study analyses to capture the variety of interactions between landslides and bridges. The knowledge produced supports a more effective application of the Guidelines, including proposed operating instructions to resolve interpretative ambiguities and to indicate priorities for future updates.</div><div>The Guidelines distinguish levels of knowledge, from initial Levels 1–2 to deeper stages that include “Special inspections” and Level 4, defined as complete knowledge. The project clarifies the purpose, scope and triggering conditions of Special inspections for landslide risk and outlines their expected content. It also proposes survey and testing campaigns aimed at achieving Level 4.</div><div>Activities are conducted with public authorities such as ANSFISA “Italian National Agency for the Safety of Railways and Road and Highway Infrastructure” and with infrastructure managers. The goal is to improve the safety, resilience and service life of critical assets under evolving environmental pressures by refining guideline interpretation and deployment, and by implementing innovative risk-management procedures and effective monitoring strategies. This multidisciplinary, integrated effort addresses key gaps in current practice.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 757-764"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating Computer Vision-based corrosion severity grading into time-dependent seismic risk assessment of corroded RC bridge piers","authors":"Vincenzo Mario Di Mucci,&nbsp;Andrea Nettis,&nbsp;Angelo Cardellicchio,&nbsp;Sergio Ruggieri,&nbsp;Vito Renò,&nbsp;Giuseppina Uva","doi":"10.1016/j.prostr.2026.06.067","DOIUrl":"10.1016/j.prostr.2026.06.067","url":null,"abstract":"<div><div>Bridges are critical infrastructure assets whose seismic performance is increasingly compromised by aging and corrosion of reinforced concrete elements. Existing risk assessment methods are often computationally demanding and neglect degradation effects, underestimating seismic vulnerability. This study presents a novel AI-based framework that leverages computer vision to quantify corrosion severity from inspection images and integrates time-dependent corrosion evolution laws to forecast the Mean Annual Frequency of Exceedance over the remaining service life. A custom convolutional neural network with attention mechanisms translates observed damage into probabilistic degradation parameters for steel and concrete, incorporated into nonlinear seismic analyses and fragility assessment. By considering the expected evolution of the observed corrosion state, the framework identifies the time at which reliability thresholds are exceeded. The approach provides a fast, cost-effective tool for estimating time-dependent seismic performance and residual service life of bridges characterized by corroded piers, supporting life-cycle–oriented maintenance planning and risk-informed decision-making.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 521-528"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic identification and finite element model calibration of a Gerber-type bridge","authors":"Laura Dieci,&nbsp;Giorgia Ghirelli,&nbsp;Daniele Scocciolini,&nbsp;Federico Ponsi,&nbsp;Ghita Eslami Varzaneh,&nbsp;Elisa Bassoli,&nbsp;Nicola Buratti,&nbsp;Loris Vincenzi","doi":"10.1016/j.prostr.2026.06.076","DOIUrl":"10.1016/j.prostr.2026.06.076","url":null,"abstract":"<div><div>The present paper deals with the numerical modelling and calibration of the “Ponte delle Grazie”, a concrete Gerber-type bridge located in Faenza (Italy) spanning the Lamone River. The bridge has a total length of 72 meters, a width of 13 meters, and consists of three spans, including a suspended deck segment supported by Gerber saddles. Built in 1950, the bridge was found to be in critical condition during 2017 inspections, with significant damage to the rocker bearings, Gerber saddles, and lateral girders, leading to urgent repairs. A follow-up evaluation according to Italian guidelines confirmed serious structural issues, prompting additional repairs in 2024. Consequently, a permanent monitoring system was installed that year as part of the DIGI-BRIDGE research project. To support an in-depth evaluation of the structural behavior, a finite element model of the superstructure has been developed based on the available design documents and a laser scanner survey. The model is calibrated against the modal properties identified through ambient vibration testing to ensure the numerical predictions closely match the experimental results. The calibration procedure is performed adopting an improved surrogate-assisted evolutionary algorithm, which combines the robustness of the Differential Evolution algorithm with the computational efficiency of a second-order surrogate approximation and of an effective infill sampling strategy. Results confirm the effectiveness of the calibration strategy in producing a numerical model that accurately represents the bridge actual dynamic behavior and serves as a valuable tool for further structural assessment.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 591-598"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Public oversight and infrastructure management: an analysis of decision-making criteria for intervention planning and prioritization","authors":"Giuseppe Alessandro Battista,&nbsp;Mario Graniero,&nbsp;Scilla Mangone,&nbsp;Alessio Vincenzo Lo Re,&nbsp;Franco Ciminelli,&nbsp;Giuseppe Palermo,&nbsp;Raffaele Crescitelli,&nbsp;Chiara Miccinelli,&nbsp;Sergio Schiaroli,&nbsp;Emanuele Renzi,&nbsp;Galileo Tamasi","doi":"10.1016/j.prostr.2026.06.089","DOIUrl":"10.1016/j.prostr.2026.06.089","url":null,"abstract":"<div><div>The safety of Italian road infrastructure is managed through a multilayered system involving ANSFISA and various operators. Defining consistent criteria for prioritizing inspections and interventions is a strategic necessity for both institutional oversight and maintenance planning. This study analyzes ANSFISA’s inspection planning while investigating how managers prioritize interventions on bridges, tunnels, and pavements, balancing safety with financial and operational constraints. By comparing technical guidelines, the study identifies alignments and divergences between public oversight and private asset management. A European benchmarking further explores scalable models from comparable safety agencies. Based on these findings, the research proposes a simplified methodology to support prioritization in both domains. The approach uses key indicators (risk, severity, exposure, and impact) ensuring compatibility with existing management systems and regulations. The goal is to better integrate supervisory actions with managerial planning, enhancing the effectiveness and resilience of the national road safety system.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"84 ","pages":"Pages 694-701"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148775706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}