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

Year 2018, Volume: 13 Issue: 2, 108 - 121, 22.04.2018

Oğuz Akın Düzgün , Ahmet Şahin Zaimoğlu

Abstract

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.

Keywords

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

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