There are, however, three schools of thought regarding the distribution
of applied shear between the chord members at an opening.
The first, as proposed by Lorensten [21], assumes that the
compression chord carries the total shear and the tension chord
merely acts as a link carrying no shear. This is probably true when
the opening is near the bottom. The second proposal by Nasser et
al. [14] and Ragan and Warwaruk [22], distributes the total shear
between the chord members in proportion to their cross-sectional
areas. The third, suggested by Barney et al. [12], distributes the
shear force in proportion to the flexural stiffness of the chord
members. Accordingly:
There are, however, three schools of thought regarding the distribution
of applied shear between the chord members at an opening.
The first, as proposed by Lorensten [21], assumes that the
compression chord carries the total shear and the tension chord
merely acts as a link carrying no shear. This is probably true when
the opening is near the bottom. The second proposal by Nasser et
al. [14] and Ragan and Warwaruk [22], distributes the total shear
between the chord members in proportion to their cross-sectional
areas. The third, suggested by Barney et al. [12], distributes the
shear force in proportion to the flexural stiffness of the chord
members. Accordingly:
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