Lateral stability of reinforced-concrete beams with initial imperfections
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Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Ice Publishing
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The paper presents the results of an analytical study aimed at investigating the lateral stability of reinforced-concrete (RC) beams with initial geometric imperfections. Based on the experimental results in the literature, a general buckling moment expression was developed, linking the limit moment of a RC beam with an initial sweep and twist to the critical moment of its geometrically perfect configuration. This expression takes into account the initial geometric and material non-linearities of the beams, the elastic-inelastic material properties of concrete and steel, the cracking of concrete due to restrained shrinkage and in-plane flexure, and the contribution of longitudinal reinforcement to stability. The formula was applied to three standard types of Aashto I-girders to determine the critical unbraced length of each type. Finally, an analytical equation was developed for estimating the lateral deflections of RC beams with initial geometric imperfections. The limit moment and lateral deflection equations were shown to provide close and conservative estimates for RC beams.
Açıklama
Anahtar Kelimeler
beams & girders, buildings structures & design, concrete structures
Kaynak
Proceedings Of The Institution Of Civil Engineers-Structures And Buildings
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
169
Sayı
10
Künye
closedAccess
