Comparação entre dados experimentais e teóricos de lajes maciças armadas em uma direção

Abstract

In this work, the behavior of solid slabs subjected to simple bending was studied, focusing on the comparison between experimental and normative values. In this sense, nine slabs, with thicknesses varying between 8, 11 and 14 cm and with reinforcement varying between only the bottom, only the top and both top and bottom, were subjected to a load distributed in a range that was 45° away from the centers of the supports, thus inducing their rupture by cutting force. Force and displacement data from the tests were obtained in order to compare with the normative results. The standards used were ABNT NBR6118:2014 and ACI318-19, both focused on concrete structures. The verification of shear force, punching and bending of the slabs was carried out. In the end, when the experimental and theoretical results were compared, it was observed that, even not considering the safety coefficients in the equations, the rupture force was higher than the normative values, thus verifying all the support and safety that the standards bring. It is concluded that the thickness of the slab increases its resistance as a whole and the use of inferior reinforcement is crucial in the elements.