Stress and strain in beam-wall interface in transition floor on support columns of structural masonry buildings

Resumo

This article aims to understand, through numerical modeling, the influencing parameters in the arch
effect, a phenomenon that arises in the interaction of structural masonry walls on reinforced concrete beams in
transition floor on column supports. Among the consequences of the arc effect is the migration of the acting loads
to the region close to the columns, causing stress peaks in the wall and reducing the bending moment acting in the
support beam. The finite element modeling and the properties of the materials adopted are presented. The increase
in stiffness due to the presence of the wall caused deflections in the beam of order up to 8 times smaller than
expected from the elastic line equation. In the wall, even in the most favorable situations, such as beams supported
by columns, we noticed an increase in acting stresses of up to 2.2 times. This points out that, by not considering
the arc effect, the support beam may be oversized, exposing the wall to stresses greater than those calculated.