RC Deep Beam Deflection Calculations
RC Deep Beam Deflection Calculations
(OP)
Hi Guys
I am using a wall as a deep beam and engaging the slabs as flanges. Is the theory the same for longterm deflection calculations for a deep beam as it is for a shallow flexural member (span/depth=2 ; span/thickness=40). I can find plenty of information regarding the flexural and shear strength but can't find much information dealing with deflections.
Regards
I am using a wall as a deep beam and engaging the slabs as flanges. Is the theory the same for longterm deflection calculations for a deep beam as it is for a shallow flexural member (span/depth=2 ; span/thickness=40). I can find plenty of information regarding the flexural and shear strength but can't find much information dealing with deflections.
Regards






RE: RC Deep Beam Deflection Calculations
RE: RC Deep Beam Deflection Calculations
A quick search over the internet for deflection of deep concrete beams: The summary from the paper by Prabhat Kumar "Short term deflection of deep beams" published by ACI Journal August 1978 - Deflection of deep beam is considerably larger than that predicted by use of simple beam deflection formula with fully cracked section moment of inertia. The paper gives expressions for predicting deflections.........
RE: RC Deep Beam Deflection Calculations
RE: RC Deep Beam Deflection Calculations
RE: RC Deep Beam Deflection Calculations
I dont know if any FEA plate elements or such would give you an accurate stress distribution, but applying a long term factor to such a model may provide reasonable deflection results.
I think it comes down to figuring out and upper and lower bound to the solution in order to get a good understanding of what may occur.