ÜÇ BOYUTLU ZEMİN-YAPI SİSTEMLERİNDE AKTİF YÖNTEMLERLE TİTREŞİM İZOLASYONU SAĞLANABİLİRLİĞİNİN ARAŞTIRILMASI

Bu çalışmada, dinamik yük etkisindeki üç boyutlu bir zemin yapı sisteminin dinamik davranışı ve zemin yüzeyinde açılan çukurların titreşim yalıtımı üzerindeki etkinliği parametrik olarak incelenmiştir. Modellemede ve analizlerde Plaxis 3D programından faydalanılmıştır. Çalışmada çukurun derinliği, genişliği, uzunluğu ve yeri parametre olarak seçilmiştir. Sonuçlar zemin yüzeyinde yer değiştirmeler cinsinden, yapıda da hem yer değiştirme hem de kesit tesiri cinsinden elde edilmiştir. Çalışmadan elde edilen sonuçlar titreşim yalıtımı için en etkili parametrenin çukurun derinliği olduğunu göstermektedir. Çukur derinliği arttıkça zemin yüzeyindeki ve yapıdaki titreşimler belirgin bir şekilde azalmaktadır. Titreşim yalıtımı problemlerindeki bir diğer etkin parametre de çukurun genişliğidir. Çukurun genişliğinin artması da genlikleri önemli ölçüde azaltmaktadır. Ancak bu azalım derinlik için elde edilen sonuçlardan daha küçüktür. Elde edilen sonuçlara göre çukurun uzunluğunun, yerinin ve içinin farklı malzemelerle doldurularak kullanılmasının titreşim yalıtımı çok az etkilediği sonucuna varılmıştır.

Anahtar Kelimeler:

Zemin-Yapı Etkileşimi, Sonlu Elemanlar, Geçirgen Sınırlar, Titreşim Yalıtımı, Çukur Geometrisi

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