Response of the Flat Reinforced Concrete Floor Slab with Openings under Cyclic In-Plane Loading

Table 5

Effect of different opening shapes.

Opening shape	Lateral load-carrying capacity (kN)	Lateral displacement (mm)	Stiffness (kN/mm)
Rectangular	64.82	3.30	19.53
Elliptical	72.62	3.37	21.50
Circular	73.77	3.53	22.49
L-shaped	55.77	3.43	17.06
Cross	68.12	2.71	20.93
T-shaped	55.60	3.25	20.75