Seismic Performance Of Self-centering System With Steel Plate Shear Wall With Butterfly-shaped Links

In order to solve the problem of "moderate earthquake repair", some scholars put forward the concept of self-centering structure system, the structure under load without residual deformation, can be restored to the state before loading after the earthquake. Self-centering system with steel plate shear wall(SC-SPSW) with butterfly-shaped links is a new type of structure form design based on self-centering, post-tensioned high strength strands running parallel to the beam, energy dissipation concentrated in the steel plate shear wall, the main structure always remain elastic, Since these features of the self-centering structure determines it is a practical approach to solve "moderate earthquake repair".Finite element software ANSYS12.0 simulated the self-centering system with steel plate shear wall with butterfly-shaped links. The change of the initial value of pretension, the thickness of the steel plate shear wall, the areas of steel strand, the height and root width of butterfly-shaped column, four groups of specimens are obtained. The four groups of specimens were subjected to monotonic loading and cyclic loading, considering the influence of main structure parameters on the stiffness of the structure, reduction capacity, bearing capacity and energy dissipation ability, draw some specific conclusions, including:1) Put forward the target design and performance of SC-SPSW with butterfly-shaped links and the corresponding design method.2) The hysteretic curve of Base specimen has some pinching of, the residual inter story displacement angle is very small and the structure has good ductility, under rare earthquake, Base specimen story displacement angle can reach 3%, all specimens can reach interlayer displacement angle of more than 2%.3) Analysis results show that: Through the reasonable parameters design, meet the performance requirements of self-centering, Frame, steel strand always remain elastic, as long as the steel plate shear wall with butterfly-shaped links replacement can regain obtain all of the design features.