Experimental Study And Application Of PK Pre-stressed Concrete Composite Slab

In the practical use of composite structures, the composite slabs are being used the most extensively; therefore the systematic researches on composite slabs have a very important realistic significance. Most of the prefabricate part of actual composite slabs are flat sheet, bracings are needed in construct moment, which greatly influenced its economic effect, furthermore it will cumber the spread use of this structure.First, we make an amelioration and innovation on common composite slabs; the uppermost are listed as follows:1. The prefab motherboard is much thinner than ever.2. It has a rib.3. There are many holes at the boundary of the rib and the motherboard, in which we will make reinforcing steel bars when constructed. And the unilateralism composite slabs transform to bidirectional composite slabs, farther ameliorated the performance of composite slabs.4. The strength of felt and occlude on superposition surface are enhanced.5. No bracing is needed.The reformative composite slab intituled PK pre-stressed concrete composite slab and the paper explores the capacity, stiffness and crack of construction phase and employ phase. And the design method of PK prefab component is proposed in many applications of projects; the techniques of construction are made perfect.According to the assumed yielding line, the capacity of PK pre-stressed concrete bidirectional composite slab is analyzed by the theory of imaginary work. The result approach to which on academic of elasticity, which indicate that the method of combine assumed yield line and academic of elasticity is feasible on the PK composite slab's design. According to the model of anisotropic slab, the PK pre-stressed concrete composite slab's stiffness in natural employ phase is theoretic analysis. The analytical result approach to the test result on spot, indicate this method is feasible. Two directional stiffness of PK pre-stressed concrete composite slab gained by experiment, which make a preferable proof for the load distribution. Educible that load distribution direct ratio to the stiffness and inverse ration to the biquadrates of length. The shearing strength of composite slabs interfaces being analyzed, which accord to the result of experiment, and the shearing strength is...