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A new type of square reinforced concrete frame column with a hollow section and spiral stirrups at the section corners is proposed. To investigate its seismic performance, three full-scale columns of this type and one full-scale conventional solid column were designed and tested under a quasi-static load. The failure mode, load-bearing, deformation, and energy-dissipation capacities of the proposed column were evaluated and compared with those of the solid column. The effects of the cavity ratio and axial load on the seismic performance were investigated. Furthermore, a refined finite element numerical simulation method for the proposed column was developed and validated.

Full-scale Experimental and Numerical Investigations on Seismic Performance of Square RC Frame Columns with Hollow Sections