Im Glas-und Fassadenbau nutzt man Silikonklebstoffe, um Glas mit metallischen Profilen oder Halterungssystemen lasttragend zu verbinden. Meist werden zusätzlich mechanische Sicherungssysteme eingesetzt und/oder die Klebfugen überdimensioniert, da Langzeiterfahrungen fehlen oder Restriktionen durch Richtlinien und Normen bestehen, die hohe pauschale Sicherheitsfaktoren nach sich ziehen. Um diese Hindernisse zu überwinden und zukünftig Klebfugen und Sicherungselement zu reduzieren, sind integrierte Sensoren und Monitoringverfahren erforderlich, die den Dehnungs-und Schädigungszustand der Klebung erfassen. Im Beitrag werden die Möglichkeiten der Integration und Nutzung faseroptischer Sensoren zur Zustandserfassung von Silikonklebverbindungen vorgestellt. Diesbezüglich werden die eingesetzten faseroptischen Messtechniken und das methodische Vorgehen sowie Ergebnisse an Kleinteilproben und einem Demonstrator diskutiert.Measuring methods of structural silicone bonded joints with fibre-optic sensors. In glass and facade construction, silicone adhesives are used to connect glass to metal profiles or mounting systems in a load-bearing manner. In this case, however, additional mechanical safety systems are usually used and/or the glued joints are oversized, because of a lack of long-term experience or there are restrictions by guidelines and standards that result in high general safety. In order to overcome these obstacles and to reduce the number of glued joints and securing elements in the future, embedded sensors and measuring methods are required for monitoring the deformation and damage status of the joints. In the article, the possibilities and challenges of in the adhesive embedded fibreoptic sensors for condition monitoring of the silicone joints are presented. In this regard, the used fiber-optic measurement techniques and the methodical approach as well as results from laboratory samples and a demonstrator are discussed.
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