U Biçimli İki Farklı Tip Metalik Sönümleyicinin Eksenel Kuvvet Altında Yapısal Davranışı ve İki Yeni Metalik Sönümleyici Tasarımı

Yıl 2022, Cilt: 38 Sayı: 3, 602 - 619, 30.12.2022

Enes Yurteri Oğuz Düğenci

Öz

Deprem etkilerine karşı sismik sönümleyici kullanımı, yapıları bu tip etkilerden korumada yenilikçi ve etkili bir yöntemdir. Yapı güvenliğini sağlayan ve yapım maliyetini düşüren bu sönümleyiciler gerek kullanım yeri gerekse üretildikleri malzeme bakımından çok çeşitlidir. Bunlardan biri olan metalik sönümleyici sistemler, kararlı histeretik davranışa sahip olmaları, sıcaklıktan ve yükleme hızından bağımsız pozitif davranış göstermeleri ve diğer sönümleme sistemlerine göre çok düşük maliyetli olmaları nedeniyle tercih edilen sönümleme sistemleridir. Bu çalışma, iki farklı U şeklinde metalik sönümleyici sistemini (H tipi- yatay kalınlıklı ve V tipi- düşey kalınlıklı) geliştirmeyi ve eksenel doğrultuda yük taşıma kapasitelerinin belirlenmesini amaçlamaktadır. Öncelikle tek parçalı biçimde metalik sönümleyicilerde modellemeler yapılmıştır. Sönümleyici parçalarının kalınlık, kol uzunluğu, kol genişliği ve toplam derinlik parametreleri değişken tutularak 228 farklı geometride sonlu elemanlar modeli oluşturulmuştur. Modelleme sonucu elde edilen histeretik özellikleri kıyaslanmış ve optimum boyutlar belirlenmiştir. Her iki tip sönümleyici tipinden ideal ölçülerle iki farklı U biçimli dört parçalı bütünleşik metalik sönümleyiciler dizayn edilmiş ve yapısal performansları ortaya konulmuştur. Yeni tip sönümleyicilerin literatürdeki diğer sönümleyiciler ile yapısal parametrelerinin karşılaştırılması yapılmıştır.

Anahtar Kelimeler

Metalik sönümleyiciler, Histeretik davranış, Sonlu elemanlar yöntemi, Sismik kontrol sistemleri, Eksenel yükleme

Kaynakça

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