Análise de métodos analíticos de blocos rígidos sobre duas estacas e as tensões limites das regiões nodais

Abstract

The pile caps are of great importance for the balance of structure and among the main difficulties for the dimensioning is the fact that there is no consonance when dealing with the model of dimensioning and behavior of these elements, which leaves various gaps on the considerations that should be made in the dimensioning, generating discrepancies, for example, the values of the compression stress in the connecting rod and the steel area value. This research led to an analytical study, compared to previous experimental tests by Delalibera (2006) and Munhoz (2014), using national and international standard codes, with the objective of evaluate the stress limits in nodal regions. Faced with this, we observe the spanish standard code has bigger evaluation forces and Santos (2013), ABNT NBR 6118 (2014) and CEB (1990) minors. Another important factor was the discrepancy of the values of the resulting of traction of the theoretical and experimental tie rods, where it presented variations according to the pile cap, but in all cases there was conservatism of the analytical methods, which may be related to the influence of the secondary reinforcement, confinement and the contribution of the tensile strength of the concrete.