Hasil (
Bahasa Indonesia) 1:
[Salinan]Disalin!
The area of reinforcing as a percentage of the total cross-sectional area of a beam is quite small (usually 2% or less), and its effect on the beam properties is almost negligible as long as the beam is uncracked. Therefore, an approximate calculation of the bending stresses in such a beam can be obtained based on the gross properties of the beam’s cross section. The stress in the concrete at any point a distance y from the neutral axis of the cross section can be determined from the following flexure formula in which M is the bending moment equal to or less than the cracking moment of the section and Ig is the gross moment of inertia of thecross section:f = MyIgSection 9.5.2.3 of the ACI Code states that the cracking moment of a section may bedetermined with ACI Equation 9-9, in which fr is the modulus of rupture of the concrete and yt is the distance from the centroidal axis of the section to its extreme fiber in tension. In this section, with its equation 9-10, the code states that fr may be taken equal to 7.5λ fc with fc in psi.
Sedang diterjemahkan, harap tunggu..