SEISMIC PERFORMANCE OF WALL-COLUMN TYPE SHEAR ENERGY-DISSIPATION DEVICES WITH COMMON STEEL PLATE

A new-style wall-column type shear energy-dissipation device (WCSED) is proposed in this paper. The device consists of two large common steel plates welded at upper and bottom areas as the restraining components, and one annealed common steel plates located in the middle area as the energy-dissipation component. Quasi-static tests were conducted on eight full-scale WCSED specimens with different stiffening ribs. The hysteretic curves, load-carrying capacity, and ductility of the test specimens were investigated to evaluate the seismic performance. The results show that the presented energy-dissipation device has large initial stiffness, high load-carrying capacity and excellent dissipation capacity. Changing the pattern and size of stiffening ribs can improve the load-carrying capacity and stiffness of the device, and also postpone and reduce the pinching effect. When the specimens lose the load-carrying capacity, the phenomenon such as fatigue cracking on some local areas divided by the stiffing ribs, out-of-plane buckling as a whole, or split cracks at the corner of the annealed steel plates can be observed on the annealed steel plates in the middle of specimens.