Parametric study of seismic performance of structures with multiple rocking joints

摘要

Research has demonstrated that base rocking lateral force resisting systems have excellent seismic performance which has resulted in their implementation in practice. However, such systems are limited in height because of force demands that are amplified by higher-mode effects. The use of multiple rocking joints, together with energy dissipation, has been proposed to mitigate higher-mode effects in rocking systems. Previous research has shown that placing a second rocking joint at the mid-height of a rocking steel braced frame, combined with the utilization of energy dissipation devices, is effective in reducing the effects of higher modes in rocking steel frames.