Abstract
The macroscopic Poisson ratio and elastic moduli of the cast-in-place hollow-core slab are researched in this paper. At first, the formulas for computing the Poisson’s ratio of cast-in-place hollowed slabs with bilateral ribs are deduced by theoretical means. Then, based on the characteristics of stress distribution, an effective sectional area method is proposed for computing both the bending and axial compressive elastic moduli of cylindrical hollow-core slabs at the transverse section, in which the boundary of the effective area is suggested to be at a radial distance with its vertical slope angle α0 =22.5° . Relevant formulas for computational purposes are also proposed. At last, the shear modulus of cylindrical hollow-core slab at the transverse section is proposed to be computed considering the bending-shear deformation of the varying rib and face sheets at a periodic segment, and relevant formulas for curved sides beam are also deduced. In the course of the study, the so-called transverse-rib-effec...
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