Numerical analysis of an elastomeric bearing pad by hyperelastic models

Abstract

Elastomeric bearing pads are responsible for transfering loads at the junction between beams and columns of bridges and viaducts, providing restrict freedom of movement in the superstructure. The elastomeric material of bearing pads is a synthetic rubber reinforced with carbon black particles and subjected to a process of vulcanization, also represented by hyperelastic material models based on strain energy density functions. The objective of the present paper is to use the finite element analysis software Abaqus® to select the most appropriate hyperelastic model, as well as its constants, applying them to a bearing pad installed in an existing viaduct, evaluating its behavior and the displacements resulting from the application of usual loads. A data fitting procedure is performed through the finite elements analysis software to obtain the Neo-Hooke, Arruda-Boyce and Yeoh model constants. The proposed methodology presents results that are coherent when compared to technical specification limits for available bearing pads products.