Issue 61

M. Khalaf et alii, Frattura ed Integrità Strutturale, 61 (2022) 308-326; DOI: 10.3221/IGF-ESIS.61.21

L 2 and L 3

: Floor panels and edge secondary beams spans; (Fig. 5).

L o1 L o2 P u

: Opening length; (Fig. 5). : Opening width; (Fig. 5).

: Models design ultimate load capacity.

r o r 1 r 2 x o y o

: Opening aspect ratio or opening rectangularity; (r = L o1 /L o2 ); (Fig. 5). : Opening longitudinal orientation position; (r 1 = L o1 /L 1 ); (Fig. 5). : Opening transverse orientation position; (r 2 = L o2 /L 2 or r 2 = L o2 /L 3 ); (Fig. 5). : Opening normalized longitudinal position; (x o = d x /L 1 ; (Fig. 5). : Opening normalized transverse position; (y o = d y /L 2 ); (Fig. 5).

z : Normalized steel beam span factor; (considered section distance away from supports compared to beam span).  : Normalized composite slab effective width factor; (= b e /b*).  d : Normalized composite slab design effective width factor, (=b emin. /b*).

326