The Interlayer Performance Of Yong And Old Concrete Linked By Reinforced Bar

The rehabilitation and strengthening of concrete structure is a major concern in many projects. The study of adhesive performance of young and old concrete has far-reaching meaning for the repair structure.Where the shoe pinches of the repair success is all right combination of young and old concrete. Presently, most of the researches inside and outside country made the two into one to against force through felt. In practice, however, it can't obtain ideal bond capacity only depend on adherence. Thus, this paper bring forward a young method to make up the lack of felt capacity—use mechanical joint element to link young and old concrete.In this article, we discussed adhesive mechanism of this method. Analyze the models of the whole new concrete sample, young and old concrete adhesive sample and young and old concrete adhesive sample linked by reinforced bar. We also made up finite element models of the cement concrete pavement. We got the findings as follow mentioned.1. When differences of the strength of concrete are in the tolerance of the standard and differences of E of concrete is small. The split strength of the young and old concrete can be calculated by formulation of the whole concrete.2. Contrast the three different models of split specimen. We got that the reinforced bar can increased the split stress in the interlayer significantly.3. Contrast the result of the ANSYS model and the experimental result. We present the load transfer behavior of the young and old concrete and behavior of the reinforced bar.4. A finite element model of the cement concrete pavement with different amount of reinforced bar was derived. We analyses the result of different models under the moving load.