Seismic performance and bearing capacity calculation of cross shaped concrete columns with built-in T-shaped steel and steel tubes.

Compared with the specimen with the thickness of 4 mm, the ultimate bearing capacity of the specimen with the t = 5 mm, 6 mm, 7 mm, and 8 mm increased by 1.0%, 1.7%, 2.8%, and 3.5% respectively, while the ductility showed a trend of gradual reduction, and degraded by 1.8%, 3.0%, 4.6%, and 5.8% respectively.

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