Joint System-Input Identification of Bridge Structures

Abstract

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

Project Number

Sözleşme No: 1014-963 ve Destek No: 65A0450

Köprü Yapılarının Eş Zamanlı Sistem ve Girdi Tanılaması

Abstract

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.

Keywords

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

Supporting Institution

Kaliforniya Jeolojik Araştırma Kurumu ve Kaliforniya Eyaleti Ulaşım Dairesi Başkanlığı

Project Number

Sözleşme No: 1014-963 ve Destek No: 65A0450

Thanks

Yazarlar, UCLA Dijital Araştırma ve Eğitim Enstitüsü'nden Dr. D'Auria'ya, buradaki analizlerin UCLA Hoffman bilgisayar kümesi üzerinden yapılmasına yardımcı olduğu için teşekkür eder. Bu yazıda sunulan çalışmalar, kısmen Kaliforniya Jeolojik Araştırma Kurumu (Sözleşme No: 1014-963) ve Kaliforniya Eyaleti Ulaşım Dairesi Başkanlığı (Destek No: 65A0450) tarafından finanse edilmiştir. Bu çalışmada ifade edilen görüşler, bulgular, sonuçlar veya tavsiyeler yazarlara aittir ve destekleyen kurumların görüşlerini yansıtmaz.

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