抄録
This report is concerned with the effects of an embedded beam on the elastic and plastic properties of framed reinforced concrete shear walls subjected to shear force. Two specimens of an identical proportion were used for the experiment, for one of which a steel beam was further embedded horizontally at the midheight location of the specimen. The effects of the embedded beam were discussed at the view-point of "Indirectly Measured Values", which were analyzed based on actually measured strains and forces, and the following results have been obtained. (1) Before cracking in the concrete wall panels, the wall panels are more or less under pure shear and the stresses of the embedded beam are negligibly small. So the existence of the embedded beam hardly influences on the behaviors of framed shear walls. (2) After cracking in the wall panels, as the embedded beam tends to prevent the peripheral frame from expansion, its tensile stress becomes fairly large. Because of these actions the shear stress distribution of column-frames with the embedded beam differs from that of the other specimen without the beam. (3) The stress-strain relationships of the peripheral steel frame acting as members of framed shear walls are evaluated as the elastic stiffnesses of the steel frame. (4) Hysteresis curves of diagonal wall members after cracking are such that under the compressive stress the curves are almost the same as that of σ-ε curve of concrete, and under tensile stress those are idealyzed into originoriented hysteresis characteristics with the tensile strength of concrete as a yielding point.
