Seismic behavior of composite shear walls failed in overturning collapse mechanism

A new type of a dual system is proposed in this paper. The structural characteristics of the system are a collapse mechanism of structural walls with hysteretic dampers and a lateral confinement method for columns. Integrated analytical and experimental studies on a prototype 12-story office building have been conducted. Four subassemblage specimens modeling essential parts of the new dual system were constructed and tested in an experimental phase of this research. This paper presents the experimental results that are compared to analytical results obtained by a method used in an analytical phase of this research. The experimental results imply that the new dual system behave in an acceptable manner during a severe earthquake from a view point of performance-based design philosophy.