Collapse performance of eccentrically braced frames affected by ground motion with pulse Available to Purchase

Many countries that faced a problem with earthquakes give attention to earthquake-resistant structures. Various types of lateral load resisting systems are required to overcome the problem, such as moment resisting frame (MRF), eccentrically braced frame (EBF), and also concentrically braced frame (CBF). These types of lateral load resisting system produce unique seismic responses after experiencing the earthquake ground motion, which could be contained a pulse effect. Ground motion with pulse effect was recorded in the station only if the near-fault earthquake occurred. Commonly, forward directivity (FD) and fling-step (FS) pulse effects were marked in the ground motion record from this type of earthquake. The FD and FS ground motions have produced a significant effect to the building structures. However, it was not clear how the FD and FS ground motion were affecting the seismic collapse performance of EBF combined with MRF. Therefore, this study has investigated the collapse performance of EBF applied between two MRFs. Thousands of nonlinear time history analyses were conducted to define the intensity measure (IM) that could produce the collapse state. The result indicates that FS is more destructive to EBF in comparison with FS. The IM of FS for probability of collapse of EBF could differ by 16.7% when it is compared with IM of FD.