ANÁLISE DOS EFEITOS DA EXCENTRICIDADE DA REAÇÃO DA LAJE SOBRE AS PAREDES DE ALVENARIA ESTRUTURAL

Resumo

In the context of the structural masonry system, design of most current building works involve

empirical-based procedures acquired from the engineering practice and transmission from constructor-
to-constructor. This kind of approach has revealed suitable as far as small or medium buildings are

concerned, and no structural pathologies have been associated with such design methods. The current
standards recommend the use of global safety coefficients to cover all the uncertainties that are not dealt
with in detail. It is the case of the reaction efforts exerted by the slabs on the walls in structural masonry,
which are generally treated as linear load applied along the average plane of the wall. This simplification
may lead to uncontrolled approximations in the design the structural elements since it does not account
for the wall out-plane bending moment, nor the twisting moment that can possibly arise along the wall
supporting beam. This contribution aims at investigating the relevance of considering or not such efforts
by analyzing the connection between slabs, walls and beams in a structural masonry building. Emphasis
is given to the way the loads are transferred and verifying the limits arising from application of the
recommendations of the Brazilian standard regarding the effect of the eccentricity. At that respect, a
study case is studied by means of simplified normative approaches as well as by finite element
simulations to support the analysis conclusions.