Yakın-fay yer hareketi etkisindeki kablo-destekli köprülerin asinkronize dinamik analizi

Yıl 2021, Cilt: 36 Sayı: 2, 727 - 742, 05.03.2021

Kurtulus Soyluk , Hayrettin Karaca

https://doi.org/10.17341/gazimmfd.594282

Öz

Bu çalışmada, merkez açıklık uzunlukları birbirine yakın olan bir eğik
kablo askılı ve bir asma köprü sistemi dikkate alınarak asinkronize yer
hareketi durumunda söz konusu köprülerin yakın fay ve uzak fay yer hareketleri
etkisindeki davranışları belirlenmeye çalışılmıştır. Japonya’da inşa edilen
Tatara Köprüsü eğik kablo askılı köprü modeli olarak seçilirken, Türkiye’de
inşa edilen Fatih Sultan Mehmet Köprüsü asma köprü modeli olarak tercih
edilmiştir. Dikkate alınan köprü sistemlerinin üç boyutlu zaman tanım alanında
analizi, Chi-Chi depreminin yakın fay ve uzak fay yer hareketi bileşenleri için
gerçekleştirilmiştir. Çalışmadan
elde edilen sonuçlar, dalga yayılma etkisinin köprü
davranışları üzerinde karmaşık bir etkisinin olduğunu ve dalga yayılma hızına ve
dikkate alınan yapısal tepkilere bağlı olarak sismik tepkileri arttırıp
azaltabildiğini göstermektedir. Diğer taraftan merkez açıklıkları 1000 m
civarında olan ve dolayısıyla diğer yapı sistemlerine göre daha yüksek titreşim
periyotlarına sahip kablo destekli köprülerin, yakın fay yer hareketlerine
maruz kaldığında daha büyük sismik talepler gösterebileceği anlaşılmaktadır.

Anahtar Kelimeler

Eğik-kablo askılı köprü, asma köprü, yakın-fay yer hareketi, uzak-fay yer hareketi, asinkronize yer hareketi modeli

Kaynakça

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