Shake-table tests on two 40-ton reinforced concrete U-shaped walls with uniaxial and bidirectional-torsional response

Reinforced concrete (RC) structures, widely used in mid- to high-rise construction, face significant challenges related to sustainability, durability, and seismic resilience. Despite extensive experimental research on RC walls, studies specifically focusing on their torsional response remain limited. To address these gaps, the ERIES-ALL4wALL project investigates the torsional and bidirectional flexural behavior of RC U-shaped walls, a key structural feature in contemporary and future high-rise buildings. This article presents experimental findings from shake-table tests on two slender U-shaped walls, evaluating their nonlinear flexural and torsional performance under realistic seismic ground motions. Advanced instrumentation techniques—such as camera-based vibration measurements—are introduced to capture detailed performance data. The accompanying open-access data are then outlined, enabling further research and development of models to improve the resilience and sustainability of RC core walls in urban environments.