The strut-and-tie modelling recommendations of the American Concrete Institute (ACI) 318-08 Appendix A are widely followed for the design of disturbed regions in concrete structures. In this investigation, an experimental appraisal of the ACI 318-08-recommended efficiency factors for prismatic and bottle-shaped struts has been carried out and inconsistency in the recommendations for bottle-shaped struts highlighted. It has been demonstrated that a bottle-shaped strut is in no way inferior to a prismatic strut in terms of strength and, consequently, the efficiency factor of bottle-shaped struts needs to be revised. An error in the ACI 318-08-recommended formulation for minimum effective transverse reinforcement in reinforced bottle-shaped struts is identified and corrected.
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August 2009
Research Article|
August 01 2009
An appraisal of the ACI strut efficiency factors
D.K. Sahoo;
D.K. Sahoo
Indian Institute of Technology Roorkee
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P. Bhargava
P. Bhargava
Indian Institute of Technology Roorkee
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Department of Civil Engineering, Indian Institute of Technology Roorkee, Uttarakhand, India
Publisher: Emerald Publishing
Revision Received:
October 24 2008
Received:
October 28 2008
Accepted:
October 28 2008
Online ISSN: 1751-763X
Print ISSN: 0024-9831
© 2009 Thomas Telford Ltd
2009
Magazine of Concrete Research (2009) 61 (6): 445–456.
Article history
Revision Received:
October 24 2008
Received:
October 28 2008
Accepted:
October 28 2008
Citation
Sahoo D, Singh B, Bhargava P (2009), "An appraisal of the ACI strut efficiency factors". Magazine of Concrete Research, Vol. 61 No. 6 pp. 445–456, doi: https://doi.org/10.1680/macr.2008.00112
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