Seismic response analysis of cable-stiffened latticed shells with buckling-restrained braces

Abstract

The dynamic response of large-span structures, such as cable-stiffened latticed shells, under seismic action is significant. This study introduces steel buckling-restrained braces (BRBs) into cable-stiffened latticed shell structures and uses small-scale shaking table experiments and finite element analysis to thoroughly investigate their impact on vibration damping performance. The accuracy of the numerical simulation methods in predicting the natural frequencies and dynamic responses of cable-stiffened latticed shells was validated by comparing the results of small-scale shaking table tests with finite element simulations. Based on the deformation characteristics of different natural modes of a cable-stiffened latticed shell, four innovative BRB arrangement methods were designed, and their vibration damping performances under three types of seismic waves were analysed. The results demonstrate that the method proposed in this study, which optimizes the BRB arrangement based on natural mode characteristics, can significantly control the displacement response of cable-stiffened latticed shell structures under seismic loads. The M2 arrangement exhibits an optimal damping effect under various seismic intensity conditions.