Keson yanaşma yapılarının dinamik davranışı

Keson tip yanaşma yapılarının stabiliteleri (dayanımları) yer değiştirmeler göz önüne alınarak iki farklı durum için incelenmiştir: Birinci durumda, farklı frekanslara sahip döngüsel yükleme keson tip yanaşma yapısına uygulanmış ve yapı üzerindeki yatay deplasmanlar (hasar) ölçülmüştür sonrasında döngüsel yükleme sonucunda oluşan hasar görmüş kesit her deneyden sonra onarılarak deneyler benzer şekilde gerçekleştirilmiştir;ikinci durumda, birinci durum için kullanılan döngüsel yükleme yapıya peş peşe ve yapı onarılmadan uygulanmış ve yapı üzerindeki yer değiştirmeler ölçülmüştür. Her iki durum için yapılan deneyler tamamlandıktan sonra, ölçülen yer değiştirmeler karşılaştırılmıştır. Deney sonuçlarına göre aynı döngüsel yükleme için ikinci durumdaki yer değiştirmelerin birinci durumda ki yer değiştirmelerden daha az olduğu görülmüştür. Ayrıca, birinci durum için beton ve anroşman arasındaki anlık dinamik sürtünme katsayısı deney sonuçları kullanılarak hesaplanmıştır. Anlık dinamik sürtünme katsayısı ile statik sürtünme katsayısı arasındaki oranın 1 değeri etrafında salındığı görülmüştür. Rölatif ivme değerlerinin iki kere integrasyonu ile hesaplanan yer değiştirmeler ve deneyler sırasında ölçülen yer değiştirmeler arasında iyi bir uyum bulunmaktadır.

Anahtar Kelimeler:

keson, deprem, sürtünme katsayısı, stabilite, , yer değiştirme

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