Çelik fiberli betonarme kirişte akustik emisyon aktivitelerinin Ib değeri analizi ile değerlendirilmesi

Year 2019, , 309 - 318, 26.03.2019

Sena Tayfur Ninel Alver Selçuk Saatcı

https://doi.org/10.17341/gazimmfd.416493

Abstract

Yapılarda meydana gelen hasarların belirlenmesinde birçok tahribatsız muayene yöntemi kullanılmaktadır. Bu yöntemlerden biri olan Akustik Emisyon (AE) ile elde edilen veriler çeşitli algoritmalarla analiz edilerek malzemedeki hasarların oluşum zamanı, yeri, türü gibi önemli bilgiler elde edilebilmektedir. Sinyal veya parametre bazlı olan bu algoritmalardan biri de Ib değeri analizidir ve AE aktivitelerinin şiddet dağılımını ölçeklendirerek aktivitelerin büyüklüğüne göre çatlak oluşumları veya mevcut çatlakların gelişimi hakkında bilgi sahibi olmaya yaramaktadır. Bu çalışmada beton matrisine eklenen çelik fiberin varlığının Ib değerlerine etkisini araştırmak amacıyla biri referans, diğeri çelik fiberli üretilen iki betonarme kiriş basit eğilme altında test edilmiş ve AE ile izlenmiştir. Deneyler sonunda elde edilen AE parametreleri çözümlenmiş, genlik değerlerine Ib değeri analizi uygulanmış ve bu parametreler birbirleriyle ilişkilendirilmiştir. Ayrıca çelik fiberin varlığının kirişin davranışına ve Ib değeri dağılımına etkisi incelenmiştir.  

Keywords

çelik fiberli betonarme kiriş, hasar tespiti; akustik emisyon; Ib değeri

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