Ultimate Strength of Ribbed Slab Composite Beams with Web Openings

Ultimate strength prediction of steel–concrete composite cellular beams with PCHCS

“…On the other hand, considering composite cellular beams, the studies dated back to the early 2000s. In the literature there are studies considering composite beams with only a rectangular web opening with solid [32][33][34][35][36][37][38][39] or composite slabs [13,[37][38][39][40][41][42][43][44][45][46][47][48], and composite plug systems with perforated beams [52][53][54][55][56]. In the latter case, one of the benefits is that WPB and VM cannot be achieved as the thin-walled perforated section with large closely spaced web opening is partially encased by concrete (one opening every other metal deck rib) which also acts as a shear connector with the concrete passing through.…”

Buckling and post-buckling analyses of composite cellular beams

“…In the case of composite cellular beams, due to the compressed cellular beam flange being restrained by the concrete slab, the ultimate strength of these structures occur through the association of the failure mechanisms of the cellular beams, in this case VM or WPB, with the mechanisms of the concrete slab, i.e. cracking or crushing [4][5][6][7][8]. VM occurs when the tees reach the yield strength, caused by the combination of normal and tangential stresses.…”

“…There are studies on composite beams with only a rectangular web opening, considering solid [19][20][21][22][23][24][25][26] or composite slabs [4,5,[32][33][34]6,7,11,[27][28][29][30][31]. The present paper focuses on studies of composite cellular beams, which are recent; mainly those initiated in the 2000s.…”

“…12 eff w w l t   (7) In which leff is the effective length of web-post, bw is the width of the web post, Do is the opening diameter, χ is the reduction factor,  is the reduced slenderness factor, λw is the web slenderness ratio and fcr,w is the critical stress at web post. Thus, the vertical shear strength can be calculated (Eq.…”

Analysis of Steel Bridges With Rectangular Web Openings: Finite Element Investigation

“…They recommended the geometry and arrangement of web openings as well as reinforcement. Park et al [10] have investigated the ultimate shear strength of ribbed slab composite beams with web openings. They found that the maximum shear capacity is approximated as the sum of the individual shear capacity of the steel beam and the concrete slab.…”