Çelik-Beton Kompozit Kat Döşemesi Yangın Dayanım Deneyi

Yıl 2017, Cilt: 28 Sayı: 3, 8007 - 8022, 29.06.0017

Serdar Selamet , Fırat Yolaçan

https://doi.org/10.18400/tekderg.307544

Cited By: 1

Öz

Bu çalışmada, Türkiye’de araştırma odaklı ilk çelik-beton kompozit kat
döşemesi yapısal yangın deneyi gerçekleştirilmiştir. Bu çalışma, Türkiye’de
gerek yangın yönetmelikleri açısından gerekse yapısal yangın konusunda teorik,
nümerik ve deneysel araştırmalardaki eksiklikleri gidermeyi amaçlamaktadır. Yüksek
katlı çelik bir yapı için tasarlanmış kompozit döşemenin iki kenarında simetrik
bir birleşim mekanizması kullanılmıştır. Yangın fırınına monte edildikten sonra
döşemenin alt yüzeyi ISO834 standart yangın eğrisiyle 105 dakika ısıtılmış ve
sonrasında 90 dakika kontrollü olarak soğutulmuştur. Deney sırasında yapının
sehim ve sıcaklık ölçümleri yapılmıştır. Alınan sonuçlar, beton döşemenin membran
davranışı göstererek yük taşıyıcı özelliğini yangın boyunca devam ettirdiğini
göstermektedir. Dolayısıyla kompozit kat döşemelerinde ikincil çelik kirişlerin
yalıtımsız kalması  önerilmektedir.  

Anahtar Kelimeler

Yangın dayanımı testi, simetrik birleşim mekanizması, yapısal yangın mühendisliği, kompozit döşeme, çelik bağlantı

Fire Resistance Test of a Steel-Concrete Floor System

Öz

This study conducts the first
research based structural fire resistance test of a steel-concrete composite
floor in Turkey. The goal of this research is to fill the knowledge gaps in the
current Turkish building code for the structural fire safety and provide valuable
insight for the development of new theoretical, computational and experimental
research. The tested composite floor is specifically designed for a high-rise
steel building. The floor is equipped with a patent pending mechanism to
provide symmetric boundary conditions on two edges. The floor is subjected to
ISO-834 standard fire curve from the bottom surface for 105 minutes followed by
90 minutes cooling. Displacement and temperature measurements show that at
elevated temperatures, the concrete slab carries the load by the tensile
membrane action without a contribution of the secondary beam. This study
suggests that secondary steel beams do not need to be fire protected as the
concrete slab is adequate to carry the gravity loading.

Anahtar Kelimeler

Fire resistance test, symmetric connection mechanism, structural fire engineering, composite floor, steel connection

Kaynakça

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