Stiffening ribbed hollow pipe cast-in-place reinforced concrete girderless floor is a new style hollow girderless floor system. Model experimental research on simply-supported floor has been done on this new kind of floor system. The experiment results show that the floor system has the mechanical property of high bearing capacity,big rigidity and good tensility. A theoretical method is presented that the stiffening ribbed hollow pipe girderless floor can be analyzed by converting it equivalently to orthotropic solid slab. It is indicated that the method is correct and reasonable according to the contrast of theoretical calculated results and experimental measured results. The theoretical results coincide with the measured results well.
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