Study Of Function Of Pipe Under Static Loading On Cast-in-Place Hollow Concrete Slab

Owing to the maturity of its technology, abundant resource of theraw materials and low cost, the reinforced concrete structure has becomethe most widely used structure form in both industrial and civilarchitectectures. With the higher and higher requirements of the buildingson the height, dead weight, room space and earthquake-resistance, andwith the development of the architectural technology, various novelmaterials and structures has emerged. As for the floor slabs, there arereinforced concrete composite floor slabs, there are reinforced concretecomposite floor slabs, cold-formed steel deck concrete floor slabs, andlong-span coreboard ect, already in use. Reported in this paper is aproblem in the floor slab with a new structure-the cast-in-place hollowslab. The structural feature of this new slab is hollow, beamless andcapless, and thus can realize long-span and light weight. But at present, inthe design of such slabs, the high strength fibre pipes are only used as ahole-forming component. While it is questioned that whether the pipescontribute to the load bearing capacity together with the concrete in theslabs. The cohesive strength between the pipe and the concrete was firstanalysed experimentally and theoretically. The disribution and themagnitude as well as the influencing factors of the cohesive stress werefound, and the relationship curve and its fitting equation of cohesivestress and slide were obtained. Finally, by the use of the general-use software ANSYS, a non-linearfinite element analysis was made, and a model for the mechanicalanalysis was established. Results were compared with the experimentaldata. The conclusions drawn from this work provides a reference forsimulation test of this structure on computers.