Shake Table Test of a Resilient High‐Rise Controlled Rocking Outrigger Core Wall System

In recent years, low‐damage seismic structural systems have attracted significant attention and have been implemented in various buildings. However, current research has predominantly focused on low‐ and mid‐rise structures. With the ongoing global urbanization, enhancing the seismic resilience of high‐rise buildings and minimizing post‐earthquake repair costs and time have become critical research focuses in earthquake engineering. In response, a novel high‐rise seismic‐resilient structural system named the controlled rocking outrigger core wall (CROCW) system was developed. CROCW consists of a self‐centering reinforced concrete rocking core wall and an outrigger truss system. The seismic behavior of the CROCW was verified from a series of shaking table tests. The tested specimen was a 1/6.5 scaled model from a 24‐storey tall building and had a height of 15.4 m and a weight of 116 t. The tested specimen was subjected to a total of 142 shaking table tests with a range of ground motions, incorporating both unidirectional and bidirectional shaking and with different combinations of energy dissipating devices. The results of the shaking table tests show that the CROCW can achieve superior performance with minor damage and no structural capacity or integrity degradation. The results from these large‐scale shake‐table tests support the viability of utilizing CROCW in high‐rise structures located in high‐seismic zones. The data collected from the shaking table test provides a rich data set needed to demonstrate seismic resilience for future low‐damage seismic design in high‐rise structures.