20.500.12556/DiRROS-25675 DFOS-based monitoring of prestressed concrete bridge girders preliminary results Due to bridges’ critical role in transportation networks, the assessment and maintenance of existing bridges have become a priority. Prestressed concrete bridges constitute a significant portion of Europe’s transportation network, yet many no longer meet today’s technical requirements. This is primarily due to two factors: (i) the unforeseen increase in heavy goods traffic, and (ii) insufficient experience with early reinforced and prestressed concrete construction methods, coupled with inadequate regulations, which resulted in design weaknesses and structural deficiencies. One critical failure mechanism, identified when recalculating existing bridges based on updated guidelines, is insufficient shear load-bearing capacity, which has prompted the premature demolition of numerous bridges. A thorough understanding and rigorous monitoring of shear behavior is essential since neglecting this problem could lead to notable consequences, especially for aging infrastructure. In this paper, a distributed fiber optic sensor (DFOS) based monitoring system, inspired by shear detection concepts, is tested. A decommissioned prestressed concrete bridge girder was equipped with a DFOS grid, allowing for detailed monitoring of crack width, location, and shape. Preliminary test results confirm the successful installation and early detection of cracks, highlighting the system’s potential to identify microcrack formation, monitor crack growth, and support maintenance strategies. structural health monitoring distributed fiber optic sensors microcracking crack growths load testing prestressed concrete spremljanje stanja konstrukcij porazdeljeni optični senzorji mikrorazpoke širjenje razpok obremenitveni preizkus prednapeti beton true false true Verlag der Technischen Universität Graz Angleški jezik Slovenski jezik Neznano 2026-01-27 09:09:10 2026-01-27 09:16:32 2026-01-28 04:15:02 0000-00-00 00:00:00 2025 0 0 Str. 170-177 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-09-06 624 10.3217/978-3-99161-057-1-029 265818115 256692995 //www.doi.org/10.3217/978-3-99161-057-1-029 0 789b17fa-fb57-11f0-a15d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=38961 RAZ_Lila_Kleo_2025.pdf RAZ_Lila_Kleo_2025.pdf 1 3F413C09A28EDA14B8F8BA58C853CFE4 da1b90143322cf1c2181a1bb308624305dc673238b4595980bd15b46d6de4eac 78b9d2b1-fb58-11f0-a15d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=38962 Zavod za gradbeništvo Slovenije 0 0 0