How to determine a reinforced concrete cross-section stiffness (or young's modulus)?
How to determine a reinforced concrete cross-section stiffness (or young's modulus)?
(OP)
I came across a problem while modeling my structure in tricalc. The deflection on one of the slabs is too big, unless i place a beam with high stiffness adjacent to it.
I'm trying to solve this by using a steel beam, but, since I cant mesh together the beam with the slab for modeling reasons, i'm using a reinforced concrete beam instead, with a high height. To make sure my steel beam will work as the concrete beam I have there, they both need the same stiffness (and i'm not yet sure that's enough by itself). However I can't find the stiffness of the concrete beam.
I tought of using elastic equations, and reverse the beam deflection to get is stiffness using the following:
deflection = 5*load*span^4/(384 * stiffness)
But this feels like cheating. So am I missing something basic here? Or is there a way to find the concrete beam stiffness? (I could assume that it was not reinforced, but that would give me a smaller stiffness than the real one)
Thanks in advance
I'm trying to solve this by using a steel beam, but, since I cant mesh together the beam with the slab for modeling reasons, i'm using a reinforced concrete beam instead, with a high height. To make sure my steel beam will work as the concrete beam I have there, they both need the same stiffness (and i'm not yet sure that's enough by itself). However I can't find the stiffness of the concrete beam.
I tought of using elastic equations, and reverse the beam deflection to get is stiffness using the following:
deflection = 5*load*span^4/(384 * stiffness)
But this feels like cheating. So am I missing something basic here? Or is there a way to find the concrete beam stiffness? (I could assume that it was not reinforced, but that would give me a smaller stiffness than the real one)
Thanks in advance






RE: How to determine a reinforced concrete cross-section stiffness (or young's modulus)?
RE: How to determine a reinforced concrete cross-section stiffness (or young's modulus)?
RE: How to determine a reinforced concrete cross-section stiffness (or young's modulus)?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: How to determine a reinforced concrete cross-section stiffness (or young's modulus)?
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