Study On Properties Of Cast-in-situ Reinforced Concrete Hollow Slab Infuenced By The Thickness Of Hollow Slab

Cast-in-situ reinforced concrete hollow slab floor system is a new floor structural system which can suit multilayer or tall buildings with big column gridding or big spaces.It can offer owners flexible spaces economically,and have a wide used foreground.Whereas,as a new technics,it's properties have not been comprehended adequately.And,it's calculating theoretics and design measures are still not consummate.Based on the contrast experiments and finite element analysis of the experimental model of cast-in-situ reinforced concrete hollow slab which is 1:4 in scale,and finite element analysis of big concrete hollow slabs,the property dissimilarity of parallel slabs and perpendicular slab and the load transfer path has been studied;The changing rule of the dissimilarity influenced by the thickness of concrete up and under the tubes has been studied.Finally,some conclusions have been made.(1) When the diameter and interval of hollow tubes and the thickness of hollow slab are not changed, with the thickness of concrete up tube becoming biger,the dissimilarity of parallel slab and perpendicular slab is becoming smaller.(2) When the diameter and interval of hollow tubes and the thickness of hollow slab are not changed,with the thickness of concrete up tube becoming biger,the deflection of hollow slab is becoming smaller.(3) When the diameter and interval of hollow tubes and the thickness of hollow slab are not changed,with the thickness of concrete up tube becoming biger,the dissimilarity of the buttress force is becoming smaller,and the ultimate load-bearing capacity is becoming biger.