When dealing with scenarios involving substantial vertical loads coupled with significant rotational angles, rubber bearings present distinct disadvantages compared to pot bearings. In such cases, elastomeric bearings necessitate expansive bearing surfaces to ensure consistent compression between the bearing and pier contact surfaces. This not only increases the bearing’s footprint but also leads to uneven stress distribution on the piers, potentially causing localized damage due to highly concentrated stresses.
As David J. Lee suggests, pot bearings emerge as a superior alternative under these demanding conditions. Their design, featuring a confined elastomer pad encased in a steel pot, allows them to accommodate high vertical loads and substantial rotations without the drawbacks associated with rubber bearings. Pot bearings distribute stress more evenly, mitigating the risk of pier damage and ensuring a safer, more resilient structure.