Determination of Actual Design Moment in Ultradeep Reinforced Concrete Rafts
Publication: Practice Periodical on Structural Design and Construction
Volume 13, Issue 4
Abstract
This paper deals with determination of actual design moment in the flexural design of ultradeep reinforced concrete rafts. Due to diagonal crack in concrete, the workpoint of the internal tension-compression couple resisting the applied moment is shifted by a distance equal to the effective depth of the member. This shift in the workpoint necessitates that the design moment at a particular section shall also be shifted accordingly. The case is highlighted with the example of a deep circular raft that is acted upon by upward buoyant forces as well as downward gravity loads. Design moments in various regions of the raft increased by 1.3 to 248% after application of the moment shift rule described in the paper. The substantial increase in moment values signifies the importance of the phenomena for ultradeep reinforced concrete rafts.
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References
ABAQUS. (2005). ABAQUS theory manual, Ver. 6.5, Hibbitt, Karlsson, and Sorensen, Providence, R.I.
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© 2008 ASCE.
History
Received: Mar 27, 2007
Accepted: Nov 15, 2007
Published online: Nov 1, 2008
Published in print: Nov 2008
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P.E.
3942 Acorn Crescent, Windsor, ON N8W 5R4, Canada. E-mail: [email protected]
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.