Annex J

(informative)

Reinforced masonry members subjected to shear loading:

enhancement of f _vd

(1) In the case of walls or beams where the main reinforcement is placed in pockets, cores or cavities filled with concrete infill as described in 3.3, the value of f _vd used to calculate V _RD1may be obtained from the following equation:

provided that f _vd is not taken to be greater than N/mm²,

where:

A _s is the cross sectional area of the primary reinforcement;

b is the width of the section;

d is the effective depth;

γ _M is the partial factor for masonry.

(2) For simply supported reinforced beams or cantilever retaining walls where the ratio of the shear span, a _v, to the effective depth, d, is six or less, f _vd may be increased by a factor, χ, where:

provided that f _vdis not taken to be greater than 1, 75/ γ _M N/mm²

The shear span, a _v, is taken to be the maximum bending moment in the section divided by the maximum shear force in the section.