In the frame-shear wall high-rise building, it is necessary to design a special cantilever structure to connect shear wall with two mutually perpendicular frame beams when they do not intersect. In the paper an innovative simplified approach to design special cantilever structure with steel reinforced concrete is presented, which includes two steps as design of feasible steel structure and design of reinforced concrete based on structural analysis and optimization. The demonstrated design idea and design method provide valuable reference for innovative design of complex cantilever structure of shear wall corner with frame beams.

When the shear wall and two orthogonal frame beams cannot intersect, a special steel reinforced concrete (SRC) cantilever structure was designed. The cyclic load test on 1:2 scale model was completed and the hysteretic loop, the ductility coefficient, the strength reduction coefficient and the equivalent viscous damping coefficient were obtained, showing that the SRC cantilever structure has agreeable seismic performance. The cracks generated by cyclic load are obliquely intersected with the frame beam, demonstrating that the SRC cantilever structure fails due to combined shear, bending and torsion.