Comparação entre métodos de cálculo para blocos sobre estacas: desenvolvimento de software

Abstract

This work develops a tool for the analysis of pile caps using the Strut-and-Tie Model. It investigated the model`s brief history, its fundamental concepts - such as the lower-bound theorem of plasticity-the structural regions that necessitate the method, and the contributions from pile cap tests. Moreover, the evolution of the model and the introduction of new concepts were presented, including various types of struts, the dispersion of the stress field near the pillar and pile, and the effect of concrete confinement. The study also researched the essential geometric parameters for constructing the pile cap, aiming to enhance the efficiency of the pile group effect, ensure the element functions as a rigid boby, obtain consistent reactions in the piles, and effectively transmit the load from the pillar to the piles. The research further encompasses the normative limits in Brazil and different calculation models employed in the technical field. The proposed tool demonstrates the flexibility to test and compare various models and criteria, which are vital for addressing diverse design situations. The software validation was conducted through the reproduction of calculated examples documented in the technical literature. The results were consistent with the referenced materials, and the differences observed were discussed, reflecting the distinct premises of each methodology. The study concludes that its primary goal has been achieved, offering a valuable tool to test and compare the different applications of the strut-and-tie model, adaptable to various technical criteria, with the potential to positively impact the educational milieu. Keywords: Pile Cap, Strut-and-Tie Model, Analysis, Design, Software, 3D Modeling.