Experimental Research On Prestressed Concrete Slabs With Openings

With the appearance of intelligentized architecture, concrete slabs with openings are used in architectural structure, through which all kinds of accessory facilities are installed such as ventilation ducts, pipeline of heat, water and electric supply, automatic producing line system and intelligent pipeline system etc. They make it possible to lower the height of architectural structure and to lighten weight of it, so as to achieve good economic and social benefits. The exist of openings will change slabs' mechanical behavior. So the right disposal around of openings is indispensable step of engineering practice. Based on the predecessors' work, this paper organized the following work centered around experimental research on and theoretical analysis of prestressed concrete slabs with openings:Firstly, the writer performed experiment with three slabs with openings, and made comparison with predecessors' work. Secondly, the writer carried out the calculation on prestressed concrete slabs with openings by yield line theory and got the changes of limit load of openings of different size, different place. Then the writer finished elastic and nonlinear analysis to slabs with different openings and different boundary by finite calculation. And the writer made comparison to all dates and got the change rule of the stress , displacement , limit load and crack of slabs with openings where changing the each parameter. Finally, the writer brought forward reasonable advice to engineering design of prestressed slabs with opening and all these advice is very important to the engineering practice of structures with openings.