2011 年 18 巻 72 号 p. 72_29-72_41
This experimental study is a part of the investigation on the seismic design method for Double Tubes Hybrid System (DTHS) for buildings. This structural system consists of RC core walls as the interior tube, and the exterior frames composed of RC short columns and RC spandrel walls as the exterior tube. The RC core walls are designed as the Energy Dissipation Structural Walls (EDSW), which are composed of RC coupled shear walls linked by short steel H-shaped beams as the energy dissipation devices. The hysteretic behavior of EDSW as the core tube has been experimentally investigated and reported elsewhere. It is clarified that EDSW behave in a very ductile manner under cyclic lateral loading, and have an ample energy dissipation capacity.
The exterior frame is made of RC spandrel walls and RC short columns. We call such a new constructional system frame as the Spandrel Wall Frame (SWF). We focus on the behavior of SWF in this paper, so that an experimental study is carried out on the SWF specimens. With respect to the RC short columns, we introduce steel Tube jacketing Reinforced Concrete (TRC) columns instead of the ordinary RC columns. The study was programmed to investigate the elasto-plastic behavior of SWF specimens under horizontal cyclic loads. The elasto-plastic behavior of the SWF showed sufficient deformability and horizontal force carrying capacity as the exterior tube of DTHS buildings.