THE EFFECT OF SLAB DISCONTINUITIES ON STRUCTURAL PERFORMANCE CAUSED BY MEZZANINE

Abstract

Slabs may contain discontinuity due to various reasons such as mezzanine. Mezzanine are widely used in our country. In this study, eigen value and static pushover analyses were made for mezzanine formed by one and two direction. Totally six different structural models were analysed separately for both X and Y direction. The periods, effective mass participation ratios, base shear force, elastic and effective rigidity and target displacement for different performance level were obtained for all structural models. Suggestions were made after comparison of all values and the interpretation of the results. The slab discontinuities and the differentiation of story heights in the building due to the mezzanine appear as risks that weaken the building defence mechanism. The study is important on behalf of asserting the interaction of two different negativity variables and revealing the effect of commonly used mezzanine levels on the structural earthquake behaviour.

Keywords

• mezzanine
• pushover
• eigen value
• irregularity
• slab discontinuity

ASMA KATIN NEDEN OLDUĞU DÖŞEME SÜREKSİZLİKLERİNİN YAPISAL PERFORMANS ÜZERİNE ETKİSİ

Öz

Döşemelerde, asma kat gibi çeşitli nedenlerden dolayı süreksizlik oluşabilir. Ülkemizde asma kat yaygın olarak kullanılmaktadır. Bu çalışmada, tek ve iki yönde oluşturulan asma kat için öz değer ve statik itme analizleri yapılmıştır. Toplam altı farklı bina modeli hem X hem de Y yönü için ayrı ayrı analizler yapılmıştır. Tüm yapısal modellerde farklı performans seviyeleri için; periyotlar, etkili kütle katılım oranları, taban kesme kuvveti, elastik ve etkili rijitlik ve hedef yer değiştirme elde edilmiştir. Tüm değerlerin karşılaştırılması ve sonuçların yorumlanmasından sonra öneriler yapılmıştır. Yapıda kullanılacak asma kat nedeniyle döşeme süreksizlikleri ve yapı içerisinde kat yüksekliklerinin farklılaşması, bina savunma mekanizmasını zayıflatan riskler olarak ortaya çıkmaktadır. Çalışma, İki farklı olumsuzluk değişkeninin etkileşimini ortaya koymak ve yaygın olarak kullanılan asma kat seviyelerinin yapısal deprem davranışı üzerindeki etkisini ortaya koymak adına önemlidir.

Anahtar Kelimeler

• Asma kat
• pushover
• öz değer
• döşeme süreksizliği
• düzensizlik

Kaynakça

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