Viga de concreto armado com razão l/h = 2: estudo comparativo como viga e viga-parede

Abstract

The present work makes a comparison on the calculation and detailing of reinforcement in the tensioned tie of a wall of a raised reservoir. The dimensions of the span (l) and height (h) of the wall under study refer to a ratio l/h = 1.96, which classifies it as a beam-wall according to the definitions of ABNT NBR 6118:2014, which establishes that beams with l/h ratio ≥ 2.0 they are classified as common beams (isostatic or continuous). Due to the fact that the l/h ratio is very close to the limit of 2.0, a comparative study based on three different calculation processes was motivated: a) simplified process as a beam-wall; b) conventional process as beam (due to the proximity of l/h to the limit value); c) using finite element analysis software (FEM). Disregarding the concept of minimum reinforcement, for the three calculation processes used for the wall under study, it is concluded that the simplification traditionally used to calculate the reinforcement of tie rods in wall beams leads to values very close to those obtained by modeling and analysis refined through the Finite Element Method.