Civil Engineering Association

Buckling-restrained braces for seismic upgrading

Buckling-Restrained Braces (BRBs) are a relatively recent development in the field of seismic resistant steel
structures. BRBs can be considered a structural system much more efficient than classic concentric braces (CCBs) to resist earthquakes because they exhibit an almost symmetric load-deformation behaviour and larger energy absorption capacity. Results of an experimental campaign consisting of full scale tests on two reinforced concrete (RC) buildings equipped with BRBs are presented and discussed. The experimental activity led to develop a novel “all-steel” BRB, which has been specifically designed for seismic upgrading of RC buildings, without interference with their functions and aesthetics. Indeed, the main characteristic of the novel braces is the possibility to hide them within the space between the two panels of masonry infill walls commonly used for claddings of RC buildings.

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Apache