Abstract:
The stiffness and strength demands of high-rise rocking wall are large, and the pre-casting and erection constructions are difficult. To mitigate the structural displacement response and the damage concentration effect, a novel structural system of continuously rocking wall-buckling restrained braced frames (CRW-BRBF) is proposed. In this system, continuously rocking wall (CRW) controls its interlayer displacement distribution pattern. The seismic action is undertaken by buckling-restrained braces (BRB), which can be regarded as the device of energy dissipation to shock absorption. As a second aseismic line, a frame is employed to bear the vertical load. Nonlinear dynamic time-history analyses under 22 ground motions are conducted in OpenSees to investigate comparatively the seismic performance of buckling-restrained braced frames (BRBF), rocking wall-buckling restrained braced frames (RW-BRBF) and CRW-BRBF. The results show that the CRW can decrease the drift concentration factor (DCF) of the BRBF. Compared with the RW-BRBF, the moment and shear force demands of the rocking wall in the CRW-BRBF are smaller.