Effect of Different Friction Pendulum Bearings on Seismic Behavior of Structures

Yıl 2022, Cilt: 10 Sayı: 4, 1826 - 1837, 25.10.2022

Muhamad Zulfakar Ali İhsan Karakaş

Öz

In this study, time-history dynamic analyses of a structure isolated with friction pendulum bearings with different friction surface number were carried out and the effects of friction surface number on the seismic behavior of the structure were investigated. For this purpose, a five-story frame structure isolated with friction pendulum bearings with single, double and three friction surfaces were modeled using three-dimensional elements with the help of the ABAQUS finite element program. Dynamic analyses were carried out taking into account an earthquake record for seismically isolated and fixed- based structures. Structural responses such as maximum story relative displacements, story accelerations and column base shear forces were compared for different isolators and fixed-base case to investigate the effects on the earthquake behavior of the structure. According to the results obtained, it was observed that the reactions in isolated structures decreased significantly compared to structures with fixed-base. When the isolators with different number of friction surfaces were compared, it was concluded that the pendulum isolator with three friction surfaces performed better than the other isolators for all considered reactions.

Anahtar Kelimeler

Seismic isolation, Friction pendulum bearing, Finite element model, Friction surface

Farklı Sürtünmeli Sarkaç Tipi İzolatörlerin Yapı Sismik Davranışına Etkileri

Öz

Bu çalışmada farklı sürtünme yüzeyi sayısına sahip sarkaç tipi izolatörler kullanılarak deprem yalıtımı sağlanan bir yapının zaman tanım alanında dinamik analizleri gerçekleştirilerek sürtünme yüzeyi sayısının yapı davranışı üzerindeki etkileri incelenmiştir. Bu amaçla beş katlı basit bir yapı ile birlikte tek, çift ve üç sürtünme yüzeyli sarkaç izolatörler ABAQUS sonlu eleman programı yardımıyla üç boyutlu elemanlar kullanılarak modellenmiştir. Dinamik analizler sismik yalıtımlı ve ankastre mesnetli yapılar için bir deprem kaydı dikkate alınarak gerçekleştirilmiştir. Maksimum kat göreli yer değiştirmeleri, kat ivmeleri ve kolon taban kesme kuvvetleri gibi yapı tepkileri farklı izolatör tipleri ve ankastre mesnetli durum için karşılaştırılarak yapının deprem davranışı üzerindeki etkileri incelenmiştir. Elde edilen sonuçlara göre izolatörlerin kullanıldığı yapılarda oluşan tepkilerin ankastre mesnetli yapılara göre önemli oranlarda azaldığı görülmüştür. Farklı sürtünme yüzeyi sayısına sahip izolatörler karşılaştırıldığında ise tüm bu tepkiler için üç sürtünme yüzeyli sarkaç izolatörün diğer izolatörlerinden daha iyi performans gösterdiği sonucuna varılmıştır. 

Anahtar Kelimeler

Deprem yalıtımı, Sürtünmeli sarkaç izolatör, Sonlu eleman modeli, Sürtünme yüzeyi

Kaynakça

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