Minimum deformability design of high-strength concrete beams in non-seismic regions

Ho, J.C.M. and Zhou, K.J.H. (2011) Minimum deformability design of high-strength concrete beams in non-seismic regions. Computers and Concrete, 8 4: 445-463.

Author Ho, J.C.M.
Zhou, K.J.H.
Title Minimum deformability design of high-strength concrete beams in non-seismic regions
Journal name Computers and Concrete   Check publisher's open access policy
ISSN 1598-8198
1598-818X
Publication date 2011
Year available 2011
Sub-type Article (original research)
Open Access Status
Volume 8
Issue 4
Start page 445
End page 463
Total pages 19
Place of publication Korea, Republic of
Publisher Techno-Press
Collection year 2011
Language eng
Formatted abstract
In the design of reinforced concrete (RC) beams, apart from providing adequate strength, it is also necessary to provide a minimum deformability even for beams not located in seismic regions. In most RC design codes, this is achieved by restricting the maximum tension steel ratio or neutral axis depth. However, this empirical deemed-to-satisfy method, which was developed based on beams made of normal-strength concrete (NSC) and normal-strength steel (NSS), would not provide a consistent deformability to beams made of high-strength concrete (HSC) and/or high-strength steel (HSS). More critically, HSC beams would have much lower deformability than that provided previously to NSC beams. To ensure that a consistent deformability is provided to all RC beams, it is proposed herein to set an absolute minimum rotation capacity to all RC beams in the design. Based on this requirement, the respective maximum limits of tension steel ratio and neutral axis depth for different concrete and steel yield strengths are derived based on a formula developed by the authors. Finally for incorporation into design codes, simplified guidelines for designing RC beams having the proposed minimum deformability are developed.
Keyword Beams
Curvature
Deformability
Design aids
High Strength Concrete
High strength steel
Reinforced concrete
Rotation capacity
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Thu, 23 Oct 2014, 17:44:05 EST by Johnny Ho on behalf of School of Civil Engineering