Cast-in place reinforced concrete stiffening ribbed hollow pipe girderless floor is a new-style reinforced concrete hollow floor system. Experimental research of simply supported slab has been done on this floor system in this paper, in order to analyze the mechanical property of the stiffening ribbed hollow pipe girderless floor, such as bearing capacity, rigidity etc. Through the experiment, the structural behaviors of stiffening ribbed hollow pipe girderless floor, including the distribution of internal force, crack, deformation,bearing capacity and failure mode have been investigated. Moreover, the slab with the hollow pipes which have the precast stiffening ribs is compared with the slab with the hollow pipes which have no the precast stiffening ribs in the experiment, and the difference of mechanical property such as the rigidity of the two sorts of slabs is analyzed. It is testified through the experiment that the stiffening ribbed hollow pipes improve the structural behavior.
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