Title:
Slab Effects on Response of Reinforced Concrete Substructures after Loss of Corner Column
Author(s):
Kai Qian and Bing Li
Publication:
Structural Journal
Volume:
109
Issue:
6
Appears on pages(s):
845-856
Keywords:
beam-column; corner; progressive collapse; reinforced concrete; slab; substructures
DOI:
10.14359/51684128
Date:
11/1/2012
Abstract:
In typical cast-in-place construction, beams, columns, and slabs act as a single structural unit. Ignoring the slab contribution to the strength and ductility of beams will result in a significant underestimation of the vertical force resistance. The influence of the slab on the strength of the floor system under imposed vertical deformation is significantly greater than that anticipated by the interpretation of the current provisions for effective slab widths acting as a flange in a T-beam analysis. Therefore, to quantify the contribution of the slab toward progressive collapse of building structures in the blast environment, two series of specimens (F and S) were tested under monotonic loading to simulate axial loading in the corner column. The experimental results highlighting the behavior, such as force-displacement responses, crack patterns, and failure mechanisms, were discussed. Comparison of the performance of these two series of specimens indicated that incorporating the reinforced concrete (RC) slab into the beam-column substructures would increase the ultimate resistance capacity by up to 63.0% and significantly reduce the likelihood of progressive collapse.