Research On Reinforced Concrete Slabs Strengthened With Stranded Wires

This dissertation has managed to explore a new strengthening technique, which utilizes stranded wire and anti-corrosion polymer mortar in order to increase the ultimate strength and other performances. Stranded wire can be gotten from steel wire factories and anti-corrosion mortar may be made by common polymer additive and cement mortar, so strengthening manipulation is facilitated and structure performances under service loads is fairly improved.The flexural experiment had been carried out according to simple-supported strengthened slabs and compared slab, which is not loaded before reinforcement. At the prerequisite of rational new concrete cover thickness and reliable anchorage between stranded wires and the mortar, ample results are obtained including load-bearing capacity, deflection and the distribution of cracks, etc.Based on experiment results and theoretical hypotheses on concrete, the fact that how many stranded wires would be rational is acquired. At the same time, making use of the contents on the failure morphology under different forms of loading, the formulae on bending moment-curvature and flexural strength are presented.Referring to concrete stiffness theory and the code for design of concrete structures, the dissertation has also suggested the calculation method on the stiffness of strengthened slab. In addition, the deflection formula is given. In the all, all of them can be referred when the technique is put into practice.As the complement to the research, the effect to secondary loaded slab should be considered. Following that, the methods on the strengthened slab's strength and stiffness have been concluded, which will be useful for research and application.