Determination of Plastic Energy Demands of Reinforced Concrete Frames under Code Specific Earthquake Levels

Yıl 2015, Cilt: 5 Sayı: 2, 101 - 113, 04.05.2015

Taner Uçar , Onur Merter

https://doi.org/10.17714/gufbed.2015.05.009

Cited By: 1

Öz

Inelastic deformation and plastic energy dissipation capabilities of reinforced concrete sections without any local and total collapse have an importance for earthquake safety in order to achieve limiting damage. Calculation of plastic energy dissipation of reinforced concrete frames due to nonlinear behavior is investigated. Nonlinear static pushover analyses of three, four and five-story reinforced concrete frames designed according to requirements of Turkish Seismic Design Code are conducted and then plastic energy diagrams are generated by considering the plastic sections formed at each load increment step of pushover analysis. Modal displacement demands and corresponding plastic energy demands of the frames are determined for different earthquake levels. Therefore, the energy dissipation capabilities of reinforced concrete frames designed according to Turkish Seismic Design Code are examined. Plastic energy demand of frames vary with earthquake level.

Anahtar Kelimeler

Nonlinear Pushover Analysis; Specific Earthquake Levels; Turkish Seismic Design Code; Plastic Energy Demand; Lateral Roof Displacement Demand

Farklı Deprem Düzeyleri İçin Betonarme Çerçevelerin Plastik Enerji İstemlerinin Belirlenmesi

Öz

Betonarme kesitlerin kısmi veya toptan göçme mekanizmaları oluşmaksızın elastik ötesi şekildeğiştirme yapabilmeleri ve buna bağlı olarak plastik enerji tüketebilme yetenekleri şiddetli depremlerin daha az hasarla atlatılması bakımından önemlidir. Bu çalışmada betonarme çerçevelerde doğrusal olmayan davranış sonucu tüketilen plastik enerjinin hesaplanması araştırılmıştır. Türk Deprem Yönetmeliği’ne uygun olarak boyutlandırılan üç, dört ve beş katlı betonarme çerçevelerin statik artımsal itme analizleri gerçekleştirilmiş ve her itme adımında oluşan plastik kesitler dikkate alınarak plastik enerji diyagramları oluşturulmuştur. Çerçevelerin farklı deprem düzeyleri için doğrusal olmayan modal yerdeğiştirme istemi ve buna karşılık gelen plastik enerji istemi belirlenmiştir. Böylece yönetmelik kuralları çerçevesinde boyutlandırılan betonarme çerçevelerin plastik enerji tüketebilme yetenekleri irdelenmiştir. Sonuçlar böyle bir potansiyelin varlığını doğrulamaktadır.    

Anahtar Kelimeler

Artımsal İtme Analizi; Deprem Düzeyleri; Türk Deprem Yönetmeliği; Plastik Enerji İstemi; Tepe Yerdeğiştirme İstemi

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