Investigation and Comparison of Brick Infilled Frames with Shear Walls in Elevated Concrete Structures as Shear Connective Member

In the past years, use of infilled frames had only been confined as filler and separator while its major role neglected for the amendment of vibration behavior of structures through earthquakes occurrence. Though, since 1967, some researches have been accomplished by Benjamin, Malik, Dow & Young, Zarnik, Moghaddam and Shahian et al.
that could stride fundamental steps to introduce the application of the rigidity and dynamic specifications of composite system of infilled frame-shear wall on the vibration behavior of structures through earthquakes occurrence. The researches can also be applied for the strengthening and optimization of available structures.
In this research, additionally to take into account the criteria which to be observed for executing infilled frames, four 20-story reinforced concrete buildings with bending frame system consisting shear walls and infilled frames (composite system of infilled frame-shear wall) are modeled in accordance with the Iranian common codes by ETABS (V 9.0.1) software which has the ability of modeling of historic behavior of reinforced concrete members and infilled frames Results of this research in 28 curves show that the application of composite system of infilled frame-shear wall can positively affect the dynamic behavior of the structure especially within higher stories and can distribute forces onto the stories.
Use of infilled frames within higher stories causes
to absorb lateral forces and hence those forces are less transported to the beams and columns. Accordingly, displacements are reduced within the higher stories therewith. Right in where shear wall can not reduce the displacement by its modal change, composite system of infilled frame-shear wall especially within higher stories will have an essential role for improving vibration behavior of frames.