Experimental Study of the Seismic Performance of L-Shaped Columns with 500 MPa Steel Bars

Table 5

Curvature ductility of L-shaped columns.

Specimen	𝑙𝑝/m	𝜑𝑦/m^−1	𝜑𝑢/m^−1	𝜃𝑝/rad	𝜇𝜙
L60L	0.150	0.04265	0.2860	0.03650	6.71
L60S	0.175	0.03584	0.1371	0.01773	3.83
L75L	0.125	0.03706	0.2651	0.02851	7.15
L75S	0.150	0.03050	0.1256	0.01427	4.12
L90L	0.125	0.03710	0.2020	0.02061	5.44
L90S	0.150	0.03555	0.1234	0.01318	3.47
L60-400	0.130	0.03015	0.1890	0.02065	6.27

Data in the table are test results loading in the positive direction; webs of L-shaped columns were under compression at that time. 𝑙_𝑝 of specimen L60-400 is calculated by Zahn equation.