Prestressed concrete composite beam with extended distance of eccentricity

摘要

So that the subject innovation is to bias the neutral axis of the beam cross-section towards the compression flanges, depending on the cross-sectional position of the composite beam will increase the bending moment due to the PSC long steel material of tensile flange efficiently, the eccentric distance to the neutral axis from the PSC tendons formed in the tensile flange in order to extend and expand the compression flange cross-sectional area than the tensile flange area (ratio eccentricity ratio of 0.42 or more of hyeonggo for eccentricity), compressed inside the compression flange to resist the increased compressive stress, the stress of a compression flange due to the eccentricity of the extension It relates to a composite beam which PSC forming a reinforcing material, to a PS composite beam's eccentric distance is extended that it is possible to optimize the cross-section of the composite beam to be economically constructed as a bridge between the middle finger.