Title: Experimental and Analytical Study on Punching Shear Strength of BubbleDecks
Author(s): Nazar K. Oukaili and Luma F. Hussein
Publication: Structural Journal
Appears on pages(s): 17-31
Keywords: BubbleDecks; concentric loads; eccentric loads; punching shear strength; self-consolidating concrete (SCC); solid decks
This paper presents an experimental and analytical investigation on the behavior of self-consolidating concrete (SCC) slabs with plastic bubbles under concentric and eccentric load. Twenty-four slabs of dimensions 1500 x 1500 mm (59 x 59 in.) with a total thickness of 100 or 130 mm (3.94 or 5.12 in.) were cast and tested. The main considered variables were: the type of specimen (solid or bubbled slabs); the diameter of the plastic spheres; concrete compressive strength; the position of the applied load relative to the longitudinal axis of the column stub; and the location of bubbles with respect to the critical shear section. The test results showed a reduction in the load capacity of the BubbleDecks compared to the reference solid slabs. ANSYS program (v15.0) was employed for analyzing the tested slabs. The analytical results showed that the general behavior of the finite element models was in good agreement with the experimental data.