Seyed Farid GHAHARİ, Mehmet ÇELEBİ, Hamed EBRAHİMİAN, Barbaros CETİNER, Ertugrul TACİROGLU

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Köprü Yapılarının Eş Zamanlı Sistem ve Girdi Tanılaması

Bu makale, deprem kayıtlarını kullanarak köprü yapılarının sistem tanılaması için yeni bir yöntem sunmaktadır. Köprüler, genellikle yapısal elemanlarının geniş mesafelere yayılmasından ötürü, diğer yapılara nispeten yer hareketlerinin uzamsal değişkenliğine daha hassastırlar. Bu nedenle, özellikle temelleri değişik zemin türlerine oturan uzun ve çok kolonlu köprülerin simülasyonlarında kullanılacak nitelikte yer hareketi kayıtlarının ölçümü karmaşık bir süreçtir. Bilhassa hem eylemsizlik hem de kinematik Zemin-Yapı Etkileşimi etkilerinin yaygın olduğu durumlarda, köprü Temel Girdi Hareketlerinin doğrudan ölçümü mümkün olmayabilir. Bu çalışmada, uzamsal olarak seyrek bir şekilde ölçülmüş sismik yapı davranış kayıtlarını kullanarak eş zamanlı sistem ve girdi tanılaması sağlayan yeni bir yöntem önerilmektedir. Önerilen metodun teyidi ve gerçek ölçekte problemlere uygulanabilirliğini doğrulamak adına, yöntem Golden Gate Köprüsü'ne uygulanmış ve elde edilen sonuçlar mevcut veriler ile karşılaştırılmıştır.
Anahtar Kelimeler:

Golden Gate Köprüsü, Kuvvetli Yer Hareketi, Temel Giriş Hareketleri, Zemin-Yapı Etkileşimi

Joint System-Input Identification of Bridge Structures

This paper presents a novel framework for system identification of bridge structures using recorded earthquake data. Bridge structures are prone to spatial variability of ground motions because they extend over relatively long distances. So, input motion measurement is a challenging task, especially for long bridges with multiple piers. Moreover, direct measurement of the bridge Foundation Input Motions (FIMs) may not be possible due to both inertial and kinematic Soil-Structure Interaction (SSI) effects. In this study, we propose a joint system-input identification solution using sparsely measured earthquake-induced responses. We verify this method and its applicability for real scale problems using simulated data obtained from the Golden Gate Bridge.
Keywords:

Golden Gate Bridge, Strong Ground Motion, Foundation Input Motions, Soil-Structure Interaction,

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Türk Deprem Araştırma Dergisi-Cover
  • Başlangıç: 2019
  • Yayıncı: Afet ve Acil Durum Yönetimi Başkanlığı (AFAD)
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