Modulus of Elasticity of Concrete Query
Modulus of Elasticity of Concrete Query
(OP)
Good morning. I just want to know if the formula in aashto lrfd 2012 for elasticity of concrete which is Ec=0.043*wc^1.5*f'c^0.5 is for plain concrete only. The wc for normal weight concrete suggested by aashto is 2320kg/m^3 but for reinforced concrete we used 24kN/m^3 >> 2447.48kg/m^3. Is it right to substitute 2447.48kg/m^3 to wc and use the formula to calculate the elasticity of reinforced concrete. We will use the computed elasticity for our bridge global model in staad and my boss said that we should use 2447.48kg/m^3 to compute for the elasticity but I didn't think it is right. Please let me know if my boss' approach is right and kindly explain why. Thank you!






RE: Modulus of Elasticity of Concrete Query
Dik
RE: Modulus of Elasticity of Concrete Query
The 24 you use is to calculate the self weight of the concrete and that has to allow for the higher density of the reinforcement in it. If it is very heavily reinforced, you should use a higher number than 24!
RE: Modulus of Elasticity of Concrete Query
RE: Modulus of Elasticity of Concrete Query
Dik
RE: Modulus of Elasticity of Concrete Query