In New Zealand, the annual generation of approximately 6.5 million end-of-life tires has become a growing concern due to their problematic disposal practices. Despite the relatively small volume, official estimates have indicated a recovery rate of around 30% in recent decades. Therefore, recognizing recycled tire materials as a valuable source of high-quality and sustainable resources is paramount in this context. Previous studies have reported that incorporating recycled rubber aggregates into concrete can create an environmentally friendly composite, potentially enhancing the seismic performance of concrete members. Despite significant progress in recent years, there are still significant gaps in our understanding of the mechanical behavior of the material. This research investigates the effects of rubber aggregates in concrete, focusing on two main aspects: the stress-strain response and the cyclic shear strength of rubberized concrete columns.