Bending capacity of T-shaped reinforced concrete beams subjected to high temperatures [Yüksek sicakliga maruz t-kesitli betonarme kirişlerin egilme taşima gücü]
Küçük Resim Yok
Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Fires, which cause life and material loss, result in a decrease both in strength of concrete and steel and moment capacity of reinforced concrete (RC) members. Reinforced concrete (RC) beams are also affected by heat and a decrease in the moment capacity occurs. To investigate hazardous effects of high temperature, temperature distribution, and internal forces in the investigated cross-sections are required. In the present study, the temperature acting on section surfaces is calculated by the equation given in ISO834. The temperature distribution within the section is defined using Laplace temperature transmission equation and losses in the strengths of materials are determined using the given formulation in Eurocode2. The heat conduction equation is solved by finite difference method, and the temperature distribution in small pieces inside the cross-section is obtained. The tensile and compressive forces are calculated using the decreased strengths of materials in small pieces inside the cross-section. Later, the moment capacity is calculated using equilibrium equations. Additionally, a practical method is suggested to determine temperaturedistribution in RC beams with T-section. Efficiency of the suggested practical method and negative effects of high temperature on moment capacity of beams are investigated. According to the obtained results, it is observed that the suggested practical method is quite effective to determine temperature-distribution in T-sections, and bending capacity of the cross-section decreases significantly with increasing fire exposure time.
Açıklama
Anahtar Kelimeler
Bearing moment capacity, Fire, Heat transfer, Reinforced concrete, T-shaped
Kaynak
Teknik Dergi/Technical Journal of Turkish Chamber of Civil Engineers
WoS Q Değeri
Scopus Q Değeri
Cilt
21
Sayı
2
