Development and Application of a Construction Method for Simply Joining RC Shear Walls to a Frame of CFT Columns and Steel Beams
By T. Sugiyama, S. Amou, Y. Kimura and J. Toyama
Concrete Journal, Vol.64, No.6, Jun. 2026
- Synopsis
- A new structural method for directly joining CFT columns and RC shear walls was proposed, and its structural performance was experimentally verified. Conventionally, a method in which RC columns are cast around the perimeter of CFT columns has been commonly used; however, this has presented problems such as excessive cross-sectional enlargement and reduced constructability. In the proposed method, RC shear walls are connected through headed studs arranged on the surfaces of the CFT columns, thereby establishing a rational stress transfer mechanism. Results of frame tests on walls without openings and with openings confirmed that the CFT columns and RC shear walls behaved integrally, and that existing evaluation methods for shear walls in RC structures can be applied. Application of this method to the basement frame of a super-high-rise project confirmed that improved constructability can be achieved. This method will continue to be developed and applied as an effective structural system that achieves both constructability and seismic performance.
- Keywords:
- CFT, Reinforced concrete, Shear wall, SC beam, Composite structure, Headed stud
