RESEARCH ON THE SEISMIC BEHAVIOR OF FACADE PANEL OF PREFABRICATED CONCRETE SHEAR WALL WITH DAMPER

U-shaped steel plate damper is a kind of bending yield energy dissipater which can adapt to large displacement. Firstly, two U-shaped steel dampers were designed and manufactured, and the quasi-static test was carried out. The results showed that the dampers had good and stable energy dissipation capacity and deformation capacity. Based on this, in order to study the effect of the facade panel with damper on the seismic behavior of the main structure, a full-scale prefabricated concrete shear wall specimen with this kind of panel was designed and fabricated. Precast concrete sandwich panel was used for facade panel, and double-row reinforcement was employed to connect the top of the panel with the coupling beam, avoiding the plastic hinge region. U-shaped steel plate dampers were connected with the foundation at the bottom of the panel by bolts. Quasi-static test was carried out for the specimen, and the test results indicated that the U-shaped steel plate dampers yielded first when the displacement was quite small, then plastic hinges appeared successively at the root of wall and the end of coupling beam, and finally, the concrete in the plastic hinge area crushed; the beam hinge mechanism could be achieved; the U-shaped steel plate dampers had ideal crawler rolling deformation manner which could meet the expectation; the hysteresis loop of the specimen was relatively full, and the specimen had good energy dissipation and deformation capacity.