Método das bielas e métodos das bielas e tirantes aplicados no dimensionamento de blocos de concreto armado

Abstract

This paper is focused on the Blevót model and the strut-and-tie model applied to reinforced concrete pile-caps. In the beginning, studies that have been developed on the field of strutand-tie models are analysed. Afterwards, the strut-and-tie model is explained, using the parameters defined by the CEB-FIP Model Code (1990). Finally, the Blévot model is also clarified, presenting information for the calculus of reinforced concrete pile-caps with two, three and four piles, subject only to patches of loading on the center top surfaces of the column. Examples of pile-caps with two, three and four piles by the Blévot model and one example of a pile-cap with two piles by the strut-and-tie model are analytically solved. The results of 90 different pile-caps calculated using the Blévot model are compared with the results achieved by applying the bending theory. The results are then presented in a spreadsheet that shows the different reinforcement areas found on the application of both methods.