Quasi-static test of full-scale structure on precast shear walls with annular closed reinforcements

In order to study the seismic behavior of precast shear walls with annular closed reinforcements, a three-story full-scale model is built in laboratory for an elastic quasi-static test. This paper introduces five kinds of working condition, including crack appears, crack developments, crack widely, vertical cracks and the limit state, then its corresponding loading is gotten. The quasi-static test loading-displacement is analyzed to research the stiffness degradation, hysteretic curve and so on. The result shows that the positive and negative stiffness is nearly equal, the stiffness decays quickly under cyclic loading, but with the cyclic number increasing, the stiffness change is slow. The hysteretic curves analysis shows that energy dissipation phenomenon of each layer is obvious, the ductility coefficient is larger. It can be seen from the strain curve of the reinforcements that connection form such as connection of annular closed reinforcements can pass external loading well. The above results show that this new building system has a very good ductility, so the structure of the overall seismic performance is good.