Steel-concrete composite frame equipped with high damping rubber devices and buckling restrained braces: experimental results

In the framework of research programs sponsored by MIUR (Italian Ministry of University and Research) and Italian Civil Protection Department (ReLUIS-DPC research project), an experimental campaign was carried out on a real scale steel concrete composite frame equipped with two types of dissipation devices. The first type of device is based on High Damping Rubber (HDR) and the tests are aimed at fully investigating the deformation ratedependent and deformation amplitude-dependent behaviour of the braced structure. Free vibration tests, followed by displacement controlled cyclic tests at low frequencies and force controlled sine sweeps were performed. The second type of device is based on an elastoplastic material. In particular Buckling Restrained Braces (BRBs) were adopted with internal aluminium core. In this case, quasi-static cyclic tests were performed in order to investigate their cyclic behaviour.