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http://dx.doi.org/10.12989/sem.2011.40.4.541

Concurrent flexural strength and deformability design of high-performance concrete beams  

Ho, J.C.M. (Department of Civil Engineering, The University of Hong Kong)
Zhou, K.J.H. (Department of Civil Engineering, The University of Hong Kong)
Publication Information
Structural Engineering and Mechanics / v.40, no.4, 2011 , pp. 541-562 More about this Journal
Abstract
In the design of earthquake resistant reinforced concrete (RC) structures, both flexural strength and deformability need to be considered. However, in almost all existing RC design codes, the design of flexural strength and deformability of RC beams are separated and independent on each other. Therefore, the pros and cons of using high-performance materials on the flexural performance of RC beams are not revealed. From the theoretical results obtained in a previous study on flexural deformability of RC beams, it is seen that the critical design factors such as degree of reinforcement, concrete/steel yield strength and confining pressure would simultaneously affect the flexural strength and deformability. To study the effects of these factors, the previous theoretical results are presented in various charts plotting flexural strength against deformability. Using these charts, a "concurrent flexural strength and deformability design" that would allow structural engineers to consider simultaneously both strength and deformability requirements is developed. For application in real construction practice where concrete strength is usually prescribed, a simpler method of determining the maximum and minimum limits of degree of reinforcement for a particular pair of strength and deformability demand is proposed. Numerical examples are presented to illustrate the application of both design methods.
Keywords
beams; curvature; deformability; high-strength concrete; reinforced concrete; rotation capacity;
Citations & Related Records
Times Cited By KSCI : 44  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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