Experimental Research on Uplift Capacity of Concrete Independent Foundation Slab

Abstract:

A total of 16 concrete independent foundation slabs with different widthtoheight ratios and hypotenuse slopes were tested under uplift load, and the failure modes and uplift bearing capacities of this type of foundation slab were studied. Based on the test results, the effects of widthtoheight ratio and hypotenuse slope on uplift bearing capacity of foundation slab were also analyzed and compared. The experimental results showed that, the uplift bearing capacity decreases obviously with the increase of hypotenuse slope when the widthtoheight ratio, the size of slab and steel reinforcement are the same. In addition, the results also showed that when the hypotenuse slope and the size of slab are same, the uplift bearing capacity of foundation slab is gradually reduced with the increase of widthtoheight ratio. The results of this study can provide experimental basis for the concrete independent foundation slab in proposing the design method of uplift capacity.

Key words:concrete independent foundation slab; uplift bearing capacity; large widthtoheight ratio; hypotenuse slope; uplift test